
Chapter 2. Installing and Upgrading MySQL

   This chapter describes how to obtain and install MySQL. A summary
   of the procedure follows and later sections provide the details.
   If you plan to upgrade an existing version of MySQL to a newer
   version rather than install MySQL for the first time, see Section
   2.4.1, "Upgrading MySQL," for information about upgrade procedures
   and about issues that you should consider before upgrading.

   If you are interested in migrating to MySQL from another database
   system, you may wish to read Section A.8, "MySQL 5.1 FAQ ---
   Migration," which contains answers to some common questions
   concerning migration issues.

    1. Determine whether MySQL runs and is supported on your
       platform.
       Please note that not all platforms are equally suitable for
       running MySQL, and that not all platforms on which MySQL is
       known to run are officially supported by Oracle Corporation:

    2. Choose which distribution to install.
       Several versions of MySQL are available, and most are
       available in several distribution formats. You can choose from
       pre-packaged distributions containing binary (precompiled)
       programs or source code. When in doubt, use a binary
       distribution. We also provide public access to our current
       source tree for those who want to see our most recent
       developments and help us test new code. To determine which
       version and type of distribution you should use, see Section
       2.1.2, "Choosing Which MySQL Distribution to Install."

    3. Download the distribution that you want to install.
       For instructions, see Section 2.1.3, "How to Get MySQL." To
       verify the integrity of the distribution, use the instructions
       in Section 2.1.4, "Verifying Package Integrity Using MD5
       Checksums or GnuPG."

    4. Install the distribution.
       To install MySQL from a binary distribution, use the
       instructions in Section 2.2, "Installing MySQL from Generic
       Binaries on Unix/Linux."
       To install MySQL from a source distribution or from the
       current development source tree, use the instructions in
       Section 2.3, "MySQL Installation Using a Source Distribution."

    5. Perform any necessary post-installation setup.
       After installing MySQL, read Section 2.13, "Post-Installation
       Setup and Testing." This section contains important
       information about making sure the MySQL server is working
       properly. It also describes how to secure the initial MySQL
       user accounts, which have no passwords until you assign
       passwords. The section applies whether you install MySQL using
       a binary or source distribution.

    6. If you want to run the MySQL benchmark scripts, Perl support
       for MySQL must be available. See Section 2.15, "Perl
       Installation Notes."

2.1. General Installation Guidance

   The immediately following sections contain the information
   necessary to choose, download, and verify your distribution. The
   instructions in later sections of the chapter describe how to
   install the distribution that you choose. For binary
   distributions, see the instructions at Section 2.2, "Installing
   MySQL from Generic Binaries on Unix/Linux" or the corresponding
   section for your platform if available. To build MySQL from
   source, use the instructions in Section 2.3, "MySQL Installation
   Using a Source Distribution."

2.1.1. Operating Systems Supported by MySQL Community Server

   This section lists the operating systems on which MySQL Community
   Server is known to run.

Important

   Oracle Corporation does not necessarily provide official support
   for all the platforms listed in this section. For information
   about those platforms that are officially supported, see
   http://www.mysql.com/support/supportedplatforms.html on the MySQL
   Web site.

   We use GNU Autoconf, so it is possible to port MySQL to all modern
   systems that have a C++ compiler and a working implementation of
   POSIX threads. (Thread support is needed for the server. To
   compile only the client code, the only requirement is a C++
   compiler.)

   MySQL has been reported to compile successfully on the following
   combinations of operating system and thread package.

     * AIX 4.x, 5.x with native threads. See Section 2.12,
       "Installing MySQL on AIX." AIX 5.3 should be upgraded to
       technology level 7 (5300-07).

     * FreeBSD 5.x and up with native threads. See Section 2.10,
       "Installing MySQL on FreeBSD."

     * HP-UX 11.x with the native threads. See Section 2.11,
       "Installing MySQL on HP-UX."

     * Linux, builds on all fairly recent Linux distributions with
       glibc 2.3. See Section 2.6, "Installing MySQL on Linux."

     * Mac OS X. See Section 2.7, "Installing MySQL on Mac OS X."

     * Solaris 2.8 on SPARC and x86, including support for native
       threads. See Section 2.8.1, "Solaris Notes."

     * Windows 2000, Windows XP, Windows Vista, Windows Server 2003,
       and Windows Server 2008. See Section 2.5, "Installing MySQL on
       Windows."

   MySQL has also been known to run on other systems in the past. See
   Section 2.1, "General Installation Guidance." Some porting effort
   might be required for current versions of MySQL on these systems.

   Not all platforms are equally well-suited for running MySQL. How
   well a certain platform is suited for a high-load mission-critical
   MySQL server is determined by the following factors:

     * General stability of the thread library. A platform may have
       an excellent reputation otherwise, but MySQL is only as stable
       as the thread library it calls, even if everything else is
       perfect.

     * The capability of the kernel and the thread library to take
       advantage of symmetric multi-processor (SMP) systems. In other
       words, when a process creates a thread, it should be possible
       for that thread to run on a CPU different from the original
       process.

     * The capability of the kernel and the thread library to run
       many threads that acquire and release a mutex over a short
       critical region frequently without excessive context switches.
       If the implementation of pthread_mutex_lock() is too anxious
       to yield CPU time, this hurts MySQL tremendously. If this
       issue is not taken care of, adding extra CPUs actually makes
       MySQL slower.

     * General file system stability and performance.

     * Table size. If your tables are large, performance is affected
       by the ability of the file system to deal with large files and
       dealing with them efficiently.

     * Our level of expertise here at Oracle Corporation with the
       platform. If we know a platform well, we enable
       platform-specific optimizations and fixes at compile time. We
       can also provide advice on configuring your system optimally
       for MySQL.

     * The amount of testing we have done internally for similar
       configurations.

     * The number of users that have run MySQL successfully on the
       platform in similar configurations. If this number is high,
       the likelihood of encountering platform-specific surprises is
       much smaller.

2.1.2. Choosing Which MySQL Distribution to Install

   When preparing to install MySQL, you should decide which version
   to use. MySQL development occurs in several release series, and
   you can pick the one that best fits your needs. After deciding
   which version to install, you can choose a distribution format.
   Releases are available in binary or source format.

2.1.2.1. Choosing Which Version of MySQL to Install

   The first decision to make is whether you want to use a production
   (stable) release or a development release. In the MySQL
   development process, multiple release series co-exist, each at a
   different stage of maturity:

     * MySQL 5.5 is the current development release series.

     * MySQL 5.1 is the current General Availability (Production)
       release series. New releases are issued for bugfixes only; no
       new features are being added that could affect stability.

     * MySQL 5.0 is the previous stable (production-quality) release
       series. MySQL 5.0 is now at the end of the product lifecycle.
       Active development and support for this version has ended.
       Extended support for MySQL 5.0 remains available. According to
       the http://www.mysql.com/about/legal/lifecycle/, only Security
       and Severity Level 1 issues are still being fixed for MySQL
       5.0.

     * MySQL 4.1, 4.0, and 3.23 are old stable (production-quality)
       release series. Active development and support for these
       versions has ended.

   We do not believe in a complete code freeze because this prevents
   us from making bugfixes and other fixes that must be done. By
   "somewhat frozen" we mean that we may add small things that should
   not affect anything that currently works in a production release.
   Naturally, relevant bugfixes from an earlier series propagate to
   later series.

   Normally, if you are beginning to use MySQL for the first time or
   trying to port it to some system for which there is no binary
   distribution, go with the General Availability release series.
   Currently, this is MySQL 5.1. All MySQL releases, even those from
   development series, are checked with the MySQL benchmarks and an
   extensive test suite before being issued.

   If you are running an older system and want to upgrade, but do not
   want to take the chance of having a nonseamless upgrade, you
   should upgrade to the latest version in the same release series
   you are using (where only the last part of the version number is
   newer than yours). We have tried to fix only fatal bugs and make
   only small, relatively "safe" changes to that version.

   If you want to use new features not present in the production
   release series, you can use a version from a development series.
   Note that development releases are not as stable as production
   releases.

   If you want to use the very latest sources containing all current
   patches and bugfixes, you can use one of our Bazaar repositories.
   These are not "releases" as such, but are available as previews of
   the code on which future releases are to be based.

   The MySQL naming scheme uses release names that consist of three
   numbers and a suffix; for example, mysql-5.0.14-rc. The numbers
   within the release name are interpreted as follows:

     * The first number (5) is the major version and describes the
       file format. All MySQL 5 releases have the same file format.

     * The second number (0) is the release level. Taken together,
       the major version and release level constitute the release
       series number.

     * The third number (14) is the version number within the release
       series. This is incremented for each new release. Usually you
       want the latest version for the series you have chosen.

   For each minor update, the last number in the version string is
   incremented. When there are major new features or minor
   incompatibilities with previous versions, the second number in the
   version string is incremented. When the file format changes, the
   first number is increased.

   Release names also include a suffix to indicates the stability
   level of the release. Releases within a series progress through a
   set of suffixes to indicate how the stability level improves. The
   possible suffixes are:

     * alpha indicates that the release is for preview purposes only.
       Known bugs should be documented in the News section (see
       Appendix C, "MySQL Change History"). Most alpha releases
       implement new commands and extensions. Active development that
       may involve major code changes can occur in an alpha release.
       However, we do conduct testing before issuing a release.

     * beta indicates that the release is appropriate for use with
       new development. Within beta releases, the features and
       compatibility should remain consistent. However, beta releases
       may contain numerous and major unaddressed bugs.
       All APIs, externally visible structures, and columns for SQL
       statements will not change during future beta, release
       candidate, or production releases.

     * rc indicates a Release Candidate. Release candidates are
       believed to be stable, having passed all of MySQL's internal
       testing, and with all known fatal runtime bugs fixed. However,
       the release has not been in widespread use long enough to know
       for sure that all bugs have been identified. Only minor fixes
       are added. (A release candidate is what formerly was known as
       a gamma release.)

     * If there is no suffix, it indicates that the release is a
       General Availability (GA) or Production release. GA releases
       are stable, having successfully passed through all earlier
       release stages and are believed to be reliable, free of
       serious bugs, and suitable for use in production systems. Only
       critical bugfixes are applied to the release.

   MySQL uses a naming scheme that is slightly different from most
   other products. In general, it is usually safe to use any version
   that has been out for a couple of weeks without being replaced by
   a new version within the same release series.

   All releases of MySQL are run through our standard tests and
   benchmarks to ensure that they are relatively safe to use. Because
   the standard tests are extended over time to check for all
   previously found bugs, the test suite keeps getting better.

   All releases have been tested at least with these tools:

     * An internal test suite
       The mysql-test directory contains an extensive set of test
       cases. We run these tests for every server binary. See Section
       22.1.2, "MySQL Test Suite," for more information about this
       test suite.

     * The MySQL benchmark suite
       This suite runs a range of common queries. It is also a test
       to determine whether the latest batch of optimizations
       actually made the code faster. See Section 7.1.3, "The MySQL
       Benchmark Suite."

   We also test the newest MySQL version in our internal production
   environment, on at least one machine. We have more than 100GB of
   data to work with.

2.1.2.2. Choosing a Distribution Format

   After choosing which version of MySQL to install, you should
   decide whether to use a binary distribution or a source
   distribution. In most cases, you should probably use a binary
   distribution, if one exists for your platform. Binary
   distributions are available in native format for many platforms,
   such as RPM files for Linux or PKG package installers for Mac OS X
   or Solaris. Distributions also are available as Zip archives or
   compressed tar files.

   Reasons to choose a binary distribution include the following:

     * Binary distributions generally are easier to install than
       source distributions.

     * To satisfy different user requirements, we provide several
       servers in binary distributions. mysqld is an optimized server
       that is a smaller, faster binary. mysqld-debug is compiled
       with debugging support.
       Each of these servers is compiled from the same source
       distribution, though with different configuration options. All
       native MySQL clients can connect to servers from either MySQL
       version.

   Under some circumstances, you may be better off installing MySQL
   from a source distribution:

     * You want to install MySQL at some explicit location. The
       standard binary distributions are ready to run at any
       installation location, but you might require even more
       flexibility to place MySQL components where you want.

     * You want to configure mysqld to ensure that features are
       available that might not be included in the standard binary
       distributions. Here is a list of the most common extra options
       that you may want to use to ensure feature availability:

          + --with-libwrap

          + --with-named-z-libs (this is done for some of the
            binaries)

          + --with-debug[=full]

     * You want to configure mysqld without some features that are
       included in the standard binary distributions. For example,
       distributions normally are compiled with support for all
       character sets. If you want a smaller MySQL server, you can
       recompile it with support for only the character sets you
       need.

     * You have a special compiler (such as pgcc) or want to use
       compiler options that are better optimized for your processor.
       Binary distributions are compiled with options that should
       work on a variety of processors from the same processor
       family.

     * You want to use the latest sources from one of the Bazaar
       repositories to have access to all current bugfixes. For
       example, if you have found a bug and reported it to the MySQL
       development team, the bugfix is committed to the source
       repository and you can access it there. The bugfix does not
       appear in a release until a release actually is issued.

     * You want to read (or modify) the C and C++ code that makes up
       MySQL. For this purpose, you should get a source distribution,
       because the source code is always the ultimate manual.

     * Source distributions contain more tests and examples than
       binary distributions.

2.1.2.3. How and When Updates Are Released

   MySQL is evolving quite rapidly and we want to share new
   developments with other MySQL users. We try to produce a new
   release whenever we have new and useful features that others also
   seem to have a need for.

   We also try to help users who request features that are easy to
   implement. We take note of what our licensed users want, and we
   especially take note of what our support customers want and try to
   help them in this regard.

   No one is required to download a new release. The News section
   helps you determine whether the new release has something you
   really want. See Appendix C, "MySQL Change History."

   We use the following policy when updating MySQL:

     * Enterprise Server releases are meant to appear every 18
       months, supplemented by quarterly service packs and monthly
       rapid updates. Community Server releases are meant to appear
       2-3 times per year.

     * Releases are issued within each series. For each release, the
       last number in the version is one more than the previous
       release within the same series.

     * Binary distributions for some platforms are made by us for
       major releases. Other people may make binary distributions for
       other systems, but probably less frequently.

     * We make fixes available as soon as we have identified and
       corrected small or noncritical but annoying bugs. The fixes
       are available in source form immediately from our public
       Bazaar repositories, and are included in the next release.

     * If by any chance a security vulnerability or critical bug is
       found in a release, our policy is to fix it in a new release
       as soon as possible. (We would like other companies to do
       this, too!)

2.1.3. How to Get MySQL

   Check our downloads page at http://dev.mysql.com/downloads/ for
   information about the current version of MySQL and for downloading
   instructions. For a complete up-to-date list of MySQL download
   mirror sites, see http://dev.mysql.com/downloads/mirrors.html. You
   can also find information there about becoming a MySQL mirror site
   and how to report a bad or out-of-date mirror.

   Our main mirror is located at http://mirrors.sunsite.dk/mysql/.

2.1.4. Verifying Package Integrity Using MD5 Checksums or GnuPG

   After you have downloaded the MySQL package that suits your needs
   and before you attempt to install it, you should make sure that it
   is intact and has not been tampered with. There are three means of
   integrity checking:

     * MD5 checksums

     * Cryptographic signatures using GnuPG, the GNU Privacy Guard

     * For RPM packages, the built-in RPM integrity verification
       mechanism

   The following sections describe how to use these methods.

   If you notice that the MD5 checksum or GPG signatures do not
   match, first try to download the respective package one more time,
   perhaps from another mirror site. If you repeatedly cannot
   successfully verify the integrity of the package, please notify us
   about such incidents, including the full package name and the
   download site you have been using, at webmaster@mysql.com or
   build@mysql.com. Do not report downloading problems using the
   bug-reporting system.

2.1.4.1. Verifying the MD5 Checksum

   After you have downloaded a MySQL package, you should make sure
   that its MD5 checksum matches the one provided on the MySQL
   download pages. Each package has an individual checksum that you
   can verify with the following command, where package_name is the
   name of the package you downloaded:
shell> md5sum package_name

   Example:
shell> md5sum mysql-standard-5.1.46-linux-i686.tar.gz
aaab65abbec64d5e907dcd41b8699945  mysql-standard-5.1.46-linux-i686.ta
r.gz

   You should verify that the resulting checksum (the string of
   hexadecimal digits) matches the one displayed on the download page
   immediately below the respective package.

Note

   Make sure to verify the checksum of the archive file (for example,
   the .zip or .tar.gz file) and not of the files that are contained
   inside of the archive.

   Note that not all operating systems support the md5sum command. On
   some, it is simply called md5, and others do not ship it at all.
   On Linux, it is part of the GNU Text Utilities package, which is
   available for a wide range of platforms. You can download the
   source code from http://www.gnu.org/software/textutils/ as well.
   If you have OpenSSL installed, you can use the command openssl md5
   package_name instead. A Windows implementation of the md5 command
   line utility is available from http://www.fourmilab.ch/md5/.
   winMd5Sum is a graphical MD5 checking tool that can be obtained
   from http://www.nullriver.com/index/products/winmd5sum.

2.1.4.2. Signature Checking Using GnuPG

   Another method of verifying the integrity and authenticity of a
   package is to use cryptographic signatures. This is more reliable
   than using MD5 checksums, but requires more work.

   We sign MySQL downloadable packages with GnuPG (GNU Privacy
   Guard). GnuPG is an Open Source alternative to the well-known
   Pretty Good Privacy (PGP) by Phil Zimmermann. See
   http://www.gnupg.org/ for more information about GnuPG and how to
   obtain and install it on your system. Most Linux distributions
   ship with GnuPG installed by default. For more information about
   GnuPG, see http://www.openpgp.org/.

   To verify the signature for a specific package, you first need to
   obtain a copy of our public GPG build key, which you can download
   from http://keyserver.pgp.com/. The key that you want to obtain is
   named build@mysql.com. Alternatively, you can cut and paste the
   key directly from the following text:
-----BEGIN PGP PUBLIC KEY BLOCK-----
Version: GnuPG v1.4.5 (GNU/Linux)

mQGiBD4+owwRBAC14GIfUfCyEDSIePvEW3SAFUdJBtoQHH/nJKZyQT7h9bPlUWC3
RODjQReyCITRrdwyrKUGku2FmeVGwn2u2WmDMNABLnpprWPkBdCk96+OmSLN9brZ
fw2vOUgCmYv2hW0hyDHuvYlQA/BThQoADgj8AW6/0Lo7V1W9/8VuHP0gQwCgvzV3
BqOxRznNCRCRxAuAuVztHRcEAJooQK1+iSiunZMYD1WufeXfshc57S/+yeJkegNW
hxwR9pRWVArNYJdDRT+rf2RUe3vpquKNQU/hnEIUHJRQqYHo8gTxvxXNQc7fJYLV
K2HtkrPbP72vwsEKMYhhr0eKCbtLGfls9krjJ6sBgACyP/Vb7hiPwxh6rDZ7ITnE
kYpXBACmWpP8NJTkamEnPCia2ZoOHODANwpUkP43I7jsDmgtobZX9qnrAXw+uNDI
QJEXM6FSbi0LLtZciNlYsafwAPEOMDKpMqAK6IyisNtPvaLd8lH0bPAnWqcyefep
rv0sxxqUEMcM3o7wwgfN83POkDasDbs3pjwPhxvhz6//62zQJ7Q7TXlTUUwgUGFj
a2FnZSBzaWduaW5nIGtleSAod3d3Lm15c3FsLmNvbSkgPGJ1aWxkQG15c3FsLmNv
bT6IXQQTEQIAHQULBwoDBAMVAwIDFgIBAheABQJLcC5lBQkQ8/JZAAoJEIxxjTtQ
cuH1oD4AoIcOQ4EoGsZvy06D0Ei5vcsWEy8dAJ4g46i3WEcdSWxMhcBSsPz65sh5
lohMBBMRAgAMBQI+PqPRBYMJZgC7AAoJEElQ4SqycpHyJOEAn1mxHijft00bKXvu
cSo/pECUmppiAJ41M9MRVj5VcdH/KN/KjRtW6tHFPYhMBBMRAgAMBQI+QoIDBYMJ
YiKJAAoJELb1zU3GuiQ/lpEAoIhpp6BozKI8p6eaabzF5MlJH58pAKCu/ROofK8J
Eg2aLos+5zEYrB/LsrkCDQQ+PqMdEAgA7+GJfxbMdY4wslPnjH9rF4N2qfWsEN/l
xaZoJYc3a6M02WCnHl6ahT2/tBK2w1QI4YFteR47gCvtgb6O1JHffOo2HfLmRDRi
Rjd1DTCHqeyX7CHhcghj/dNRlW2Z0l5QFEcmV9U0Vhp3aFfWC4Ujfs3LU+hkAWzE
7zaD5cH9J7yv/6xuZVw411x0h4UqsTcWMu0iM1BzELqX1DY7LwoPEb/O9Rkbf4fm
Le11EzIaCa4PqARXQZc4dhSinMt6K3X4BrRsKTfozBu74F47D8Ilbf5vSYHbuE5p
/1oIDznkg/p8kW+3FxuWrycciqFTcNz215yyX39LXFnlLzKUb/F5GwADBQf+Lwqq
a8CGrRfsOAJxim63CHfty5mUc5rUSnTslGYEIOCR1BeQauyPZbPDsDD9MZ1ZaSaf
anFvwFG6Llx9xkU7tzq+vKLoWkm4u5xf3vn55VjnSd1aQ9eQnUcXiL4cnBGoTbOW
I39EcyzgslzBdC++MPjcQTcA7p6JUVsP6oAB3FQWg54tuUo0Ec8bsM8b3Ev42Lmu
QT5NdKHGwHsXTPtl0klk4bQk4OajHsiy1BMahpT27jWjJlMiJc+IWJ0mghkKHt92
6s/ymfdf5HkdQ1cyvsz5tryVI3Fx78XeSYfQvuuwqp2H139pXGEkg0n6KdUOetdZ
Whe70YGNPw1yjWJT1IhMBBgRAgAMBQI+PqMdBQkJZgGAAAoJEIxxjTtQcuH17p4A
n3r1QpVC9yhnW2cSAjq+kr72GX0eAJ4295kl6NxYEuFApmr1+0uUq/SlsQ==
=Mski

-----END PGP PUBLIC KEY BLOCK-----

   To import the build key into your personal public GPG keyring, use
   gpg --import. For example, if you have saved the key in a file
   named mysql_pubkey.asc, the import command looks like this:
shell> gpg --import mysql_pubkey.asc
gpg: key 5072E1F5: public key "MySQL Package signing key (www.mysql.c
om) <build@mysql.com>" imported
gpg: Total number processed: 1
gpg:               imported: 1
gpg: no ultimately trusted keys found

   You can also download the key from the public keyserver using the
   public key id, 5072E1F5:
shell> gpg --recv-keys 5072E1F5
gpg: requesting key 5072E1F5 from hkp server subkeys.pgp.net
gpg: key 5072E1F5: "MySQL Package signing key (www.mysql.com) <build@
mysql.com>" 2 new signatures
gpg: no ultimately trusted keys found
gpg: Total number processed: 1
gpg:         new signatures: 2

   If you want to import the key into your RPM configuration to
   validate RPM install packages, you should be able to import the
   key directly:
shell> rpm --import mysql_pubkey.asc

   If you experience problems, try exporting the key from gpg and
   importing:
shell> gpg --export -a 5072e1f5 > 5072e1f5.asc
shell> rpm --import 5072e1f5.asc

   Alternatively, rpm also supports loading the key directly from a
   URL, and you cas use this manual page:
shell> rpm --import http://dev.mysql.com/doc/refman/5.1/en/checking-g
pg-signature.html

   After you have downloaded and imported the public build key,
   download your desired MySQL package and the corresponding
   signature, which also is available from the download page. The
   signature file has the same name as the distribution file with an
   .asc extension, as shown by the examples in the following table.
   Distribution file mysql-standard-5.1.46-linux-i686.tar.gz
   Signature file    mysql-standard-5.1.46-linux-i686.tar.gz.asc

   Make sure that both files are stored in the same directory and
   then run the following command to verify the signature for the
   distribution file:
shell> gpg --verify package_name.asc

   Example:
shell> gpg --verify mysql-standard-5.1.46-linux-i686.tar.gz.asc
gpg: Signature made Tue 12 Jul 2005 23:35:41 EST using DSA key ID 507
2E1F5
gpg: Good signature from "MySQL Package signing key (www.mysql.com) <
build@mysql.com>"

   The Good signature message indicates that everything is all right.
   You can ignore any insecure memory warning you might obtain.

   See the GPG documentation for more information on how to work with
   public keys.

2.1.4.3. Signature Checking Using RPM

   For RPM packages, there is no separate signature. RPM packages
   have a built-in GPG signature and MD5 checksum. You can verify a
   package by running the following command:
shell> rpm --checksig package_name.rpm

   Example:
shell> rpm --checksig MySQL-server-5.1.46-0.glibc23.i386.rpm
MySQL-server-5.1.46-0.glibc23.i386.rpm: md5 gpg OK

Note

   If you are using RPM 4.1 and it complains about (GPG) NOT OK
   (MISSING KEYS: GPG#5072e1f5), even though you have imported the
   MySQL public build key into your own GPG keyring, you need to
   import the key into the RPM keyring first. RPM 4.1 no longer uses
   your personal GPG keyring (or GPG itself). Rather, it maintains
   its own keyring because it is a system-wide application and a
   user's GPG public keyring is a user-specific file. To import the
   MySQL public key into the RPM keyring, first obtain the key as
   described in Section 2.1.4.2, "Signature Checking Using GnuPG."
   Then use rpm --import to import the key. For example, if you have
   saved the public key in a file named mysql_pubkey.asc, import it
   using this command:
shell> rpm --import mysql_pubkey.asc

   If you need to obtain the MySQL public key, see Section 2.1.4.2,
   "Signature Checking Using GnuPG."

2.1.5. Installation Layouts

   This section describes the default layout of the directories
   created by installing binary or source distributions provided by
   Oracle Corporation. A distribution provided by another vendor
   might use a layout different from those shown here.

   Installations created from our Linux RPM distributions result in
   files under the following system directories.
   Directory            Contents of Directory
   /usr/bin             Client programs and scripts
   /usr/sbin            The mysqld server
   /var/lib/mysql       Log files, databases
   /usr/share/info      Manual in Info format
   /usr/share/man       Unix manual pages
   /usr/include/mysql   Include (header) files
   /usr/lib/mysql       Libraries
   /usr/share/mysql     Error message and character set files
   /usr/share/sql-bench Benchmarks

   On Unix, a tar file binary distribution is installed by unpacking
   it at the installation location you choose (typically
   /usr/local/mysql) and creates the following directories in that
   location.
   Directory   Contents of Directory
   bin         Client programs and the mysqld server
   data        Log files, databases
   docs        Manual in Info format
   man         Unix manual pages
   include     Include (header) files
   lib         Libraries
   scripts     mysql_install_db
   share/mysql Error message files
   sql-bench   Benchmarks

   A source distribution is installed after you configure and compile
   it. By default, the installation step installs files under
   /usr/local, in the following subdirectories.
   Directory     Contents of Directory
   bin           Client programs and scripts
   include/mysql Include (header) files
   Docs          Manual in Info, CHM formats
   man           Unix manual pages
   lib/mysql     Libraries
   libexec       The mysqld server
   share/mysql   Error message files
   sql-bench     Benchmarks and crash-me test
   var           Databases and log files

   Within its installation directory, the layout of a source
   installation differs from that of a binary installation in the
   following ways:

     * The mysqld server is installed in the libexec directory rather
       than in the bin directory.

     * The data directory is var rather than data.

     * mysql_install_db is installed in the bin directory rather than
       in the scripts directory.

     * The header file and library directories are include/mysql and
       lib/mysql rather than include and lib.

   You can create your own binary installation from a compiled source
   distribution by executing the scripts/make_binary_distribution
   script from the top directory of the source distribution.

2.2. Installing MySQL from Generic Binaries on Unix/Linux

   This section covers the installation of MySQL binary distributions
   that are provided for various platforms in the form of compressed
   tar files (files with a .tar.gz extension).

   To obtain MySQL, see Section 2.1.3, "How to Get MySQL."

   Sun Microsystems, Inc. provides a set of binary distributions of
   MySQL. In addition to binaries provided in platform-specific
   package formats, we offer binary distributions for a number of
   platforms in the form of compressed tar files (.tar.gz files). For
   Windows distributions, see Section 2.5, "Installing MySQL on
   Windows."

   If you want to compile a debug version of MySQL from a source
   distribution, you should add --with-debug or --with-debug=full to
   the configure command used to configure the distribution and
   remove any -fomit-frame-pointer options.

   MySQL tar file binary distributions have names of the form
   mysql-VERSION-OS.tar.gz, where VERSION is a number (for example,
   5.1.46), and OS indicates the type of operating system for which
   the distribution is intended (for example, pc-linux-i686).

   In addition to these generic packages, we also offer binaries in
   platform-specific package formats for selected platforms. See the
   platform specific sections for more information, for more
   information on how to install these.

   You need the following tools to install a MySQL tar file binary
   distribution:

     * GNU gunzip to uncompress the distribution.

     * A reasonable tar to unpack the distribution. GNU tar is known
       to work. Some operating systems come with a preinstalled
       version of tar that is known to have problems. For example,
       the tar provided with early versions of Mac OS X, SunOS 4.x,
       Solaris 8, Solaris 9, Solaris 10 and OpenSolaris, and HP-UX
       are known to have problems with long file names. On Mac OS X,
       you can use the preinstalled gnutar program. On Solaris 10 and
       OpenSolaris you can use the preinstalled gtar. On other
       systems with a deficient tar, you should install GNU tar
       first.

   If you run into problems and need to file a bug report, please use
   the instructions in Section 1.7, "How to Report Bugs or Problems."

   The basic commands that you must execute to install and use a
   MySQL binary distribution are:
shell> groupadd mysql
shell> useradd -g mysql mysql
shell> cd /usr/local
shell> gunzip < /path/to/mysql-VERSION-OS.tar.gz | tar xvf -
shell> ln -s full-path-to-mysql-VERSION-OS mysql
shell> cd mysql
shell> chown -R mysql .
shell> chgrp -R mysql .
shell> scripts/mysql_install_db --user=mysql
shell> chown -R root .
shell> chown -R mysql data
shell> bin/mysqld_safe --user=mysql &

Note

   This procedure does not set up any passwords for MySQL accounts.
   After following the procedure, proceed to Section 2.13,
   "Post-Installation Setup and Testing."

   A more detailed version of the preceding description for
   installing a binary distribution follows:

    1. Add a login user and group for mysqld to run as:
shell> groupadd mysql
shell> useradd -g mysql mysql
       These commands add the mysql group and the mysql user. The
       syntax for useradd and groupadd may differ slightly on
       different versions of Unix, or they may have different names
       such as adduser and addgroup.
       You might want to call the user and group something else
       instead of mysql. If so, substitute the appropriate name in
       the following steps.

    2. Pick the directory under which you want to unpack the
       distribution and change location into it. In the following
       example, we unpack the distribution under /usr/local. (The
       instructions, therefore, assume that you have permission to
       create files and directories in /usr/local. If that directory
       is protected, you must perform the installation as root.)
shell> cd /usr/local

    3. Obtain a distribution file using the instructions in Section
       2.1.3, "How to Get MySQL." For a given release, binary
       distributions for all platforms are built from the same MySQL
       source distribution.

    4. Unpack the distribution, which creates the installation
       directory. Then create a symbolic link to that directory:
shell> gunzip < /path/to/mysql-VERSION-OS.tar.gz | tar xvf -
shell> ln -s full-path-to-mysql-VERSION-OS mysql
       The tar command creates a directory named mysql-VERSION-OS.
       The ln command makes a symbolic link to that directory. This
       lets you refer more easily to the installation directory as
       /usr/local/mysql.
       With GNU tar, no separate invocation of gunzip is necessary.
       You can replace the first line with the following alternative
       command to uncompress and extract the distribution:
shell> tar zxvf /path/to/mysql-VERSION-OS.tar.gz

    5. Change location into the installation directory:
shell> cd mysql
       You will find several files and subdirectories in the mysql
       directory. The most important for installation purposes are
       the bin and scripts subdirectories:

          + The bin directory contains client programs and the
            server. You should add the full path name of this
            directory to your PATH environment variable so that your
            shell finds the MySQL programs properly. See Section
            2.14, "Environment Variables."

          + The scripts directory contains the mysql_install_db
            script used to initialize the mysql database containing
            the grant tables that store the server access
            permissions.

    6. Ensure that the distribution contents are accessible to mysql.
       If you unpacked the distribution as mysql, no further action
       is required. If you unpacked the distribution as root, its
       contents will be owned by root. Change its ownership to mysql
       by executing the following commands as root in the
       installation directory:
shell> chown -R mysql .
shell> chgrp -R mysql .
       The first command changes the owner attribute of the files to
       the mysql user. The second changes the group attribute to the
       mysql group.

    7. If you have not installed MySQL before, you must create the
       MySQL data directory and initialize the grant tables:
shell> scripts/mysql_install_db --user=mysql
       If you run the command as root, include the --user option as
       shown. If you run the command while logged in as that user,
       you can omit the --user option.
       The command should create the data directory and its contents
       with mysql as the owner.
       After creating or updating the grant tables, you need to
       restart the server manually.

    8. Most of the MySQL installation can be owned by root if you
       like. The exception is that the data directory must be owned
       by mysql. To accomplish this, run the following commands as
       root in the installation directory:
shell> chown -R root .
shell> chown -R mysql data

    9. If you want MySQL to start automatically when you boot your
       machine, you can copy support-files/mysql.server to the
       location where your system has its startup files. More
       information can be found in the support-files/mysql.server
       script itself and in Section 2.13.1.2, "Starting and Stopping
       MySQL Automatically."
   10. You can set up new accounts using the bin/mysql_setpermission
       script if you install the DBI and DBD::mysql Perl modules. See
       Section 4.6.14, "mysql_setpermission --- Interactively Set
       Permissions in Grant Tables." For Perl module installation
       instructions, see Section 2.15, "Perl Installation Notes."
   11. If you would like to use mysqlaccess and have the MySQL
       distribution in some nonstandard location, you must change the
       location where mysqlaccess expects to find the mysql client.
       Edit the bin/mysqlaccess script at approximately line 18.
       Search for a line that looks like this:
$MYSQL     = '/usr/local/bin/mysql';    # path to mysql executable
       Change the path to reflect the location where mysql actually
       is stored on your system. If you do not do this, a Broken pipe
       error will occur when you run mysqlaccess.

   After everything has been unpacked and installed, you should test
   your distribution. To start the MySQL server, use the following
   command:
shell> bin/mysqld_safe --user=mysql &

   If you run the command as root, you must use the --user option as
   shown. The value of the option is the name of the login account
   that you created in the first step to use for running the server.
   If you run the command while logged in as mysql, you can omit the
   --user option.

   If the command fails immediately and prints mysqld ended, you can
   find some information in the host_name.err file in the data
   directory.

   More information about mysqld_safe is given in Section 4.3.2,
   "mysqld_safe --- MySQL Server Startup Script."

Note

   The accounts that are listed in the MySQL grant tables initially
   have no passwords. After starting the server, you should set up
   passwords for them using the instructions in Section 2.13,
   "Post-Installation Setup and Testing."

2.3. MySQL Installation Using a Source Distribution

   Before you proceed with an installation from source, first check
   whether our binary is available for your platform and whether it
   works for you. We put a great deal of effort into ensuring that
   our binaries are built with the best possible options.

   To obtain a source distribution for MySQL, Section 2.1.3, "How to
   Get MySQL." If you want to build MySQL from source on Windows, see
   Section 2.5.10, "Installing MySQL from Source on Windows."

   MySQL source distributions are provided as compressed tar archives
   and have names of the form mysql-VERSION.tar.gz, where VERSION is
   a number like 5.1.46.

   You need the following tools to build and install MySQL from
   source:

     * GNU gunzip to uncompress the distribution.

     * A reasonable tar to unpack the distribution. GNU tar is known
       to work. Some operating systems come with a preinstalled
       version of tar that is known to have problems. For example,
       the tar provided with early versions of Mac OS X, SunOS 4.x,
       Solaris 8, Solaris 9, Solaris 10 and OpenSolaris, and HP-UX
       are known to have problems with long file names. On Mac OS X,
       you can use the preinstalled gnutar program. On Solaris 10 and
       OpenSolaris you can use the preinstalled gtar. On other
       systems with a deficient tar, you should install GNU tar
       first.

     * A working ANSI C++ compiler. GCC 3.2 or later, Sun Studio 10
       or later, Visual Studio 2005 or later, and many current
       vendor-supplied compilers are known to work.

     * A good make program. GNU make is always recommended and is
       sometimes required. (BSD make fails, and vendor-provided make
       implementations may fail as well.) If you have problems, use
       GNU make 3.75 or newer.

     * libtool 1.5.24 or later is also recommended.

   If you are using a version of gcc recent enough to understand the
   -fno-exceptions option, it is very important that you use this
   option. Otherwise, you may compile a binary that crashes randomly.
   Also use -felide-constructors and -fno-rtti along with
   -fno-exceptions. When in doubt, do the following:
CFLAGS="-O3" CXX=gcc CXXFLAGS="-O3 -felide-constructors \
       -fno-exceptions -fno-rtti" ./configure \
       --prefix=/usr/local/mysql --enable-assembler \
       --with-mysqld-ldflags=-all-static

   On most systems, this gives you a fast and stable binary.

   If you run into problems and need to file a bug report, please use
   the instructions in Section 1.7, "How to Report Bugs or Problems."

2.3.1. Source Installation Overview

   The basic commands that you must execute to install a MySQL source
   distribution are:
shell> groupadd mysql
shell> useradd -g mysql mysql
shell> gunzip < mysql-VERSION.tar.gz | tar -xvf -
shell> cd mysql-VERSION
shell> ./configure --prefix=/usr/local/mysql
shell> make
shell> make install
shell> cp support-files/my-medium.cnf /etc/my.cnf
shell> cd /usr/local/mysql
shell> chown -R mysql .
shell> chgrp -R mysql .
shell> bin/mysql_install_db --user=mysql
shell> chown -R root .
shell> chown -R mysql var
shell> bin/mysqld_safe --user=mysql &

   If you start from a source RPM, do the following:
shell> rpmbuild --rebuild --clean MySQL-VERSION.src.rpm

   This makes a binary RPM that you can install. For older versions
   of RPM, you may have to replace the command rpmbuild with rpm
   instead.

Note

   This procedure does not set up any passwords for MySQL accounts.
   After following the procedure, proceed to Section 2.13,
   "Post-Installation Setup and Testing," for post-installation setup
   and testing.

   A more detailed version of the preceding description for
   installing MySQL from a source distribution follows:

    1. Add a login user and group for mysqld to run as:
shell> groupadd mysql
shell> useradd -g mysql mysql
       These commands add the mysql group and the mysql user. The
       syntax for useradd and groupadd may differ slightly on
       different versions of Unix, or they may have different names
       such as adduser and addgroup.
       You might want to call the user and group something else
       instead of mysql. If so, substitute the appropriate name in
       the following steps.

    2. Perform the following steps as the mysql user, except as
       noted.

    3. Pick the directory under which you want to unpack the
       distribution and change location into it.

    4. Obtain a distribution file using the instructions in Section
       2.1.3, "How to Get MySQL."

    5. Unpack the distribution into the current directory:
shell> gunzip < /path/to/mysql-VERSION.tar.gz | tar xvf -
       This command creates a directory named mysql-VERSION.
       With GNU tar, no separate invocation of gunzip is necessary.
       You can use the following alternative command to uncompress
       and extract the distribution:
shell> tar zxvf /path/to/mysql-VERSION-OS.tar.gz

    6. Change location into the top-level directory of the unpacked
       distribution:
shell> cd mysql-VERSION
       Note that currently you must configure and build MySQL from
       this top-level directory. You cannot build it in a different
       directory.

    7. Configure the release and compile everything:
shell> ./configure --prefix=/usr/local/mysql
shell> make
       When you run configure, you might want to specify other
       options. Run ./configure --help for a list of options. Section
       2.3.2, "Typical configure Options," discusses some of the more
       useful options.
       If configure fails and you are going to send mail to a MySQL
       mailing list to ask for assistance, please include any lines
       from config.log that you think can help solve the problem.
       Also include the last couple of lines of output from
       configure. To file a bug report, please use the instructions
       in Section 1.7, "How to Report Bugs or Problems."
       If the compile fails, see Section 2.3.4, "Dealing with
       Problems Compiling MySQL," for help.

    8. Install the distribution:
shell> make install
       You might need to run this command as root.
       If you want to set up an option file, use one of those present
       in the support-files directory as a template. For example:
shell> cp support-files/my-medium.cnf /etc/my.cnf
       You might need to run this command as root.
       If you want to configure support for InnoDB tables, you should
       edit the /etc/my.cnf file, remove the # character before the
       option lines that start with innodb_..., and modify the option
       values to be what you want. See Section 4.2.3.3, "Using Option
       Files," and Section 13.6.2, "InnoDB Configuration."

    9. Change location into the installation directory:
shell> cd /usr/local/mysql
   10. If you ran the make install command as root, the installed
       files will be owned by root. Ensure that the installation is
       accessible to mysql by executing the following commands as
       root in the installation directory:
shell> chown -R mysql .
shell> chgrp -R mysql .
       The first command changes the owner attribute of the files to
       the mysql user. The second changes the group attribute to the
       mysql group.
   11. If you have not installed MySQL before, you must create the
       MySQL data directory and initialize the grant tables:
shell> bin/mysql_install_db --user=mysql
       If you run the command as root, include the --user option as
       shown. If you run the command while logged in as mysql, you
       can omit the --user option.
       The command should create the data directory and its contents
       with mysql as the owner.
       After using mysql_install_db to create the grant tables for
       MySQL, you must restart the server manually. The mysqld_safe
       command to do this is shown in a later step.
   12. Most of the MySQL installation can be owned by root if you
       like. The exception is that the data directory must be owned
       by mysql. To accomplish this, run the following commands as
       root in the installation directory:
shell> chown -R root .
shell> chown -R mysql var
   13. If you want MySQL to start automatically when you boot your
       machine, you can copy support-files/mysql.server to the
       location where your system has its startup files. More
       information can be found in the support-files/mysql.server
       script itself; see also Section 2.13.1.2, "Starting and
       Stopping MySQL Automatically."
   14. You can set up new accounts using the bin/mysql_setpermission
       script if you install the DBI and DBD::mysql Perl modules. See
       Section 4.6.14, "mysql_setpermission --- Interactively Set
       Permissions in Grant Tables." For Perl module installation
       instructions, see Section 2.15, "Perl Installation Notes."

   After everything has been installed, you should test your
   distribution. To start the MySQL server, use the following
   command:
shell> /usr/local/mysql/bin/mysqld_safe --user=mysql &

   If you run the command as root, you should use the --user option
   as shown. The value of the option is the name of the login account
   that you created in the first step to use for running the server.
   If you run the command while logged in as that user, you can omit
   the --user option.

   If the command fails immediately and prints mysqld ended, you can
   find some information in the host_name.err file in the data
   directory.

   More information about mysqld_safe is given in Section 4.3.2,
   "mysqld_safe --- MySQL Server Startup Script."

Note

   The accounts that are listed in the MySQL grant tables initially
   have no passwords. After starting the server, you should set up
   passwords for them using the instructions in Section 2.13,
   "Post-Installation Setup and Testing."

2.3.2. Typical configure Options

   The configure script gives you a great deal of control over how
   you configure a MySQL source distribution. Typically you do this
   using options on the configure command line. You can also affect
   configure using certain environment variables. See Section 2.14,
   "Environment Variables." For a full list of options supported by
   configure, run this command:
shell> ./configure --help

   A list of the available configure options is provided in the table
   below.

   Table 2.1. Build (configure) Reference
   Formats Description Default Introduced Removed
   --bindir=DIR User executables EPREFIX/bin
   --build=BUILD Configure for building on BUILD guessed
   --cache-file=FILE Cache test results in FILE disabled
   -C Alias for `--cache-file=config.cache'
   --config-cache
   --datadir=DIR Read-only architecture-independent data PREFIX/share

   --disable-FEATURE Do not include FEATURE
   --disable-dependency-tracking Disable dependency tracking
   --disable-grant-options Disable GRANT options
   --disable-largefile Omit support for large files
   --disable-libtool-lock Disable libtool lock
   --disable-thread-safe-client Compile the client without threads
   5.1.7
   --enable-FEATURE Enable FEATURE
   --enable-assembler Use assembler versions of some string functions
   if available
   --enable-debug-sync Compile in Debug Sync facility   5.1.41
   --enable-dependency-tracking Do not reject slow dependency
   extractors
   --enable-fast-install Optimize for fast installation yes
   --enable-local-infile Enable LOAD DATA LOCAL INFILE disabled
   --enable-shared Build shared libraries yes
   --enable-static Build static libraries yes
   --enable-thread-safe-client Compile the client with threads
   --exec-prefix=EPREFIX Install architecture-dependent files in
   EPREFIX
   -h Display this help and exit
   --help
   --help=short Display options specific to this package
   --help=recursive Display the short help of all the included
   packages
   --host=HOST Cross-compile to build programs to run on HOST
   --includedir=DIR C header files PREFIX/include
   --infodir=DIR Info documentation PREFIX/info
   --libdir=DIR Object code libraries EPREFIX/lib
   --libexecdir=DIR Program executables EPREFIX/libexec
   --localstatedir=DIR Modifiable single-machine data PREFIX/var
   --mandir=DIR man documentation PREFIX/man
   -n Do not create output files
   --no-create
   --oldincludedir=DIR C header files for non-gcc /usr/include
   --prefix=PREFIX Install architecture-independent files in PREFIX

   --program-prefix=PREFIX Prepend PREFIX to installed program names

   --program-suffix=SUFFIX Append SUFFIX to installed program names

   --program-transform-name=PROGRAM run sed PROGRAM on installed
   program names
   -q Do not print `checking...' messages
   --quiet
   --sbindir=DIR System admin executables EPREFIX/sbin
   --sharedstatedir=DIR Modifiable architecture-independent data
   PREFIX/com
   --srcdir=DIR Find the sources in DIR configure directory or ..
   --sysconfdir=DIR Read-only single-machine data PREFIX/etc
   --target=TARGET Configure for building compilers for TARGET
   -V Display version information and exit
   --version
   --with-PACKAGE Use PACKAGE
   --with-archive-storage-engine Enable the Archive Storage Engine no

   --with-atomic-ops Implement atomic operations using pthread
   rwlocks or atomic CPU instructions for multi-processor   5.1.12
   --with-berkeley-db Use BerkeleyDB located in DIR no
   --with-berkeley-db-includes Find Berkeley DB headers in DIR
   --with-berkeley-db-libs Find Berkeley DB libraries in DIR
   --with-big-tables Support tables with more than 4 G rows even on
   32 bit platforms
   --with-blackhole-storage-engine Enable the Blackhole Storage
   Engine no
   --with-charset Default character set
   --with-client-ldflags Extra linking arguments for clients
   --with-collation Default collation
   --with-comment Comment about compilation environment
   --with-csv-storage-engine Enable the CSV Storage Engine yes
   --with-darwin-mwcc Use Metrowerks CodeWarrior wrappers on OS
   X/Darwin
   --with-debug Add debug code   5.1.7
   --with-debug=full Add debug code (adds memory checker, very slow)

   --with-embedded-privilege-control Build parts to check user's
   privileges (only affects embedded library)
   --with-embedded-server Build the embedded server
   --with-error-inject Enable error injection in MySQL Server
   5.1.11
   --with-example-storage-engine Enable the Example Storage Engine no

   --with-extra-charsets Use charsets in addition to default
   --with-fast-mutexes Compile with fast mutexes enabled 5.1.5
   --with-federated-storage-engine Enable federated storage engine no
   5.1.3 5.1.9
   --with-gnu-ld Assume the C compiler uses GNU ld no
   --with-innodb Enable innobase storage engine no 5.1.3 5.1.9
   --with-lib-ccflags Extra CC options for libraries
   --with-libwrap=DIR Compile in libwrap (tcp_wrappers) support
   --with-low-memory Try to use less memory to compile to avoid
   memory limitations
   --with-machine-type Set the machine type, like "powerpc"
   --with-max-indexes=N Sets the maximum number of indexes per table
   64
   --with-mysqld-ldflags Extra linking arguments for mysqld
   --with-mysqld-libs Extra libraries to link with for mysqld
   --with-mysqld-user What user the mysqld daemon shall be run as

   --with-mysqlmanager Build the mysqlmanager binary Build if server
   is built
   --with-named-curses-libs Use specified curses libraries
   --with-named-thread-libs Use specified thread libraries
   --with-ndb-ccflags Extra CC options for ndb compile
   --with-ndb-docs Include the NDB Cluster ndbapi and mgmapi
   documentation
   --with-ndb-port Port for NDB Cluster management server
   --with-ndb-port-base Port for NDB Cluster management server
   --with-ndb-sci=DIR Provide MySQL with a custom location of sci
   library
   --with-ndb-test Include the NDB Cluster ndbapi test programs
   --with-ndbcluster Include the NDB Cluster table handler no
   --with-openssl=DIR Include the OpenSSL support
   --with-openssl-includes Find OpenSSL headers in DIR
   --with-openssl-libs Find OpenSSL libraries in DIR
   --with-other-libc=DIR Link against libc and other standard
   libraries installed in the specified nonstandard location
   --with-pic Try to use only PIC/non-PIC objects Use both
   --with-plugin-PLUGIN Forces the named plugin to be linked into
   mysqld statically   5.1.11
   --with-plugins Plugins to include in mysqld none 5.1.11
   --with-pstack Use the pstack backtrace library
   --with-pthread Force use of pthread library
   --with-row-based-replication Include row-based replication   5.1.5
   5.1.6
   --with-server-suffix Append value to the version string
   --with-ssl=DIR Include SSL support   5.1.11
   --with-system-type Set the system type, like "sun-solaris10"
   --with-tags Include additional configurations automatic
   --with-tcp-port Which port to use for MySQL services 3306
   --with-unix-socket-path Where to put the unix-domain socket
   --with-yassl Include the yaSSL support
   --with-zlib-dir=no|bundled|DIR Provide MySQL with a custom
   location of compression library
   --without-PACKAGE Do not use PACKAGE
   --without-bench Skip building of the benchmark suite
   --without-debug Build a production version without debugging code

   --without-docs Skip building of the documentation
   --without-extra-tools Skip building utilities in the tools
   directory
   --without-geometry Do not build geometry-related parts
   --without-libedit Use system libedit instead of bundled copy
   --without-man Skip building of the man pages
   --without-ndb-binlog Disable ndb binlog   5.1.6
   --without-ndb-debug Disable special ndb debug features
   --without-plugin-PLUGIN Exclude PLUGIN   5.1.11
   --without-query-cache Do not build query cache
   --without-readline Use system readline instead of bundled copy

   --without-row-based-replication Don't include row-based
   replication   5.1.7 5.1.14
   --without-server Only build the client
   --without-uca Skip building of the national Unicode collations

   Some of the configure options available are described here. For
   options that may be of use if you have difficulties building
   MySQL, see Section 2.3.4, "Dealing with Problems Compiling MySQL."

     * To compile just the MySQL client libraries and client programs
       and not the server, use the --without-server option:
shell> ./configure --without-server
       If you have no C++ compiler, some client programs such as
       mysql cannot be compiled because they require C++.. In this
       case, you can remove the code in configure that tests for the
       C++ compiler and then run ./configure with the
       --without-server option. The compile step should still try to
       build all clients, but you can ignore any warnings about files
       such as mysql.cc. (If make stops, try make -k to tell it to
       continue with the rest of the build even if errors occur.)

     * If you want to build the embedded MySQL library (libmysqld.a),
       use the --with-embedded-server option.

     * If you don't want your log files and database directories
       located under /usr/local/var, use a configure command
       something like one of these:
shell> ./configure --prefix=/usr/local/mysql
shell> ./configure --prefix=/usr/local \
           --localstatedir=/usr/local/mysql/data
       The first command changes the installation prefix so that
       everything is installed under /usr/local/mysql rather than the
       default of /usr/local. The second command preserves the
       default installation prefix, but overrides the default
       location for database directories (normally /usr/local/var)
       and changes it to /usr/local/mysql/data.
       You can also specify the installation directory and data
       directory locations at server startup time by using the
       --basedir and --datadir options. These can be given on the
       command line or in an MySQL option file, although it is more
       common to use an option file. See Section 4.2.3.3, "Using
       Option Files."

     * This option specifies the port number on which the server
       listens for TCP/IP connections. The default is port 3306. To
       listen on a different port, use a configure command like this:
shell> ./configure --with-tcp-port=3307

     * If you are using Unix and you want the MySQL socket file
       location to be somewhere other than the default location
       (normally in the directory /tmp or /var/run), use a configure
       command like this:
shell> ./configure \
           --with-unix-socket-path=/usr/local/mysql/tmp/mysql.sock
       The socket file name must be an absolute path name. You can
       also change the location of mysql.sock at server startup by
       using a MySQL option file. See Section B.5.4.5, "How to
       Protect or Change the MySQL Unix Socket File."

     * If you want to compile statically linked programs (for
       example, to make a binary distribution, to get better
       performance, or to work around problems with some Red Hat
       Linux distributions), run configure like this:
shell> ./configure --with-client-ldflags=-all-static \
           --with-mysqld-ldflags=-all-static

     * If you are using gcc and don't have libg++ or libstdc++
       installed, you can tell configure to use gcc as your C++
       compiler:
shell> CC=gcc CXX=gcc ./configure
       When you use gcc as your C++ compiler, it does not attempt to
       link in libg++ or libstdc++. This may be a good thing to do
       even if you have those libraries installed. Some versions of
       them have caused strange problems for MySQL users in the past.
       The following list indicates some compilers and environment
       variable settings that are commonly used with each one.

          + gcc 2.7.2:
CC=gcc CXX=gcc CXXFLAGS="-O3 -felide-constructors"

          + gcc 2.95.2:
CFLAGS="-O3 -mpentiumpro" CXX=gcc CXXFLAGS="-O3 -mpentiumpro \
-felide-constructors -fno-exceptions -fno-rtti"

          + pgcc 2.90.29 or newer:
CFLAGS="-O3 -mpentiumpro -mstack-align-double" CXX=gcc \
CXXFLAGS="-O3 -mpentiumpro -mstack-align-double \
-felide-constructors -fno-exceptions -fno-rtti"
       In most cases, you can get a reasonably optimized MySQL binary
       by using the options from the preceding list and adding the
       following options to the configure line:
--prefix=/usr/local/mysql --enable-assembler \
--with-mysqld-ldflags=-all-static
       The full configure line would, in other words, be something
       like the following for all recent gcc versions:
CFLAGS="-O3 -mpentiumpro" CXX=gcc CXXFLAGS="-O3 -mpentiumpro \
-felide-constructors -fno-exceptions -fno-rtti" ./configure \
--prefix=/usr/local/mysql --enable-assembler \
--with-mysqld-ldflags=-all-static
       The binaries we provide on the MySQL Web site at
       http://dev.mysql.com/downloads/ are all compiled with full
       optimization and should be perfect for most users. See Section
       2.2, "Installing MySQL from Generic Binaries on Unix/Linux."
       There are some configuration settings you can tweak to build
       an even faster binary, but these are only for advanced users.
       See Section 7.5.1, "How Compiling and Linking Affects the
       Speed of MySQL."
       If the build fails and produces errors about your compiler or
       linker not being able to create the shared library
       libmysqlclient.so.N (where N is a version number), you can
       work around this problem by giving the --disable-shared option
       to configure. In this case, configure does not build a shared
       libmysqlclient.so.N library.

     * By default, MySQL uses the latin1 (cp1252 West European)
       character set. To change the default set, use the
       --with-charset option:
shell> ./configure --with-charset=CHARSET
       CHARSET may be one of binary, armscii8, ascii, big5, cp1250,
       cp1251, cp1256, cp1257, cp850, cp852, cp866, cp932, dec8,
       eucjpms, euckr, gb2312, gbk, geostd8, greek, hebrew, hp8,
       keybcs2, koi8r, koi8u, latin1, latin2, latin5, latin7, macce,
       macroman, sjis, swe7, tis620, ucs2, ujis, utf8. (Additional
       character sets might be available. Check the output from
       ./configure --help for the current list.)
       The default collation may also be specified. MySQL uses the
       latin1_swedish_ci collation by default. To change this, use
       the --with-collation option:
shell> ./configure --with-collation=COLLATION
       To change both the character set and the collation, use both
       the --with-charset and --with-collation options. The collation
       must be a legal collation for the character set. (Use the SHOW
       COLLATION statement to determine which collations are
       available for each character set.)
       With the configure option --with-extra-charsets=LIST, you can
       define which additional character sets should be compiled into
       the server. LIST is one of the following:

          + A list of character set names separated by spaces

          + complex to include all character sets that can't be
            dynamically loaded

          + all to include all character sets into the binaries
       Clients that want to convert characters between the server and
       the client should use the SET NAMES statement. See Section
       5.1.5, "Session System Variables," and Section 9.1.4,
       "Connection Character Sets and Collations."

     * To configure MySQL with debugging code, use the --with-debug
       option:
shell> ./configure --with-debug
       This causes a safe memory allocator to be included that can
       find some errors and that provides output about what is
       happening. See MySQL Internals: Porting
       (http://forge.mysql.com/wiki/MySQL_Internals_Porting).
       As of MySQL 5.1.12, using --with-debug to configure MySQL with
       debugging support enables you to use the
       --debug-dbug="d,parser_debug" option when you start the server.
       This causes the Bison parser that is used to process SQL
       statements to dump a parser trace to the server's standard
       error output. Typically, this output is written to the error
       log.

     * To cause the Debug Sync facility to be compiled into the
       server, use the --enable-debug-sync option. This facility is
       used for testing and debugging. When compiled in, Debug Sync
       is disabled by default. To enable it, start mysqld with the
       --debug-sync-timeout=N option, where N is a timeout value
       greater than 0. (The default value is 0, which disables Debug
       Sync.) N becomes the default timeout for individual
       synchronization points.
       Debug Sync is also compiled in if you configure with the
       --with-debug option (which implies --enable-debug-sync),
       unless you also use the --disable-debug-sync option.
       For a description of the Debug Sync facility and how to use
       synchronization points, see MySQL Internals: Test
       Synchronization
       (http://forge.mysql.com/wiki/MySQL_Internals_Test_Synchronizat
       ion).
       The --enable-debug-sync and --disable-debug-sync options were
       added in MySQL 5.1.41.

     * If your client programs are using threads, you must compile a
       thread-safe version of the MySQL client library with the
       --enable-thread-safe-client configure option. This creates a
       libmysqlclient_r library with which you should link your
       threaded applications. See Section 21.9.16.2, "How to Make a
       Threaded Client."

     * Some features require that the server be built with
       compression library support, such as the COMPRESS() and
       UNCOMPRESS() functions, and compression of the client/server
       protocol. The --with-zlib-dir=no|bundled|DIR option provides
       control over compression library support. The value no
       explicitly disables compression support. bundled causes the
       zlib library bundled in the MySQL sources to be used. A DIR
       path name specifies the directory in which to find the
       compression library sources.

     * It is possible to build MySQL with large table support using
       the --with-big-tables option.
       This option causes the variables that store table row counts
       to be declared as unsigned long long rather than unsigned
       long. This enables tables to hold up to approximately
       1.844E+19 ((2^32)^2) rows rather than 2^32 (~4.295E+09) rows.
       Previously it was necessary to pass -DBIG_TABLES to the
       compiler manually in order to enable this feature.

     * Run configure with the --disable-grant-options option to cause
       the --bootstrap, --skip-grant-tables, and --init-file options
       for mysqld to be disabled. For Windows, the configure.js
       script recognizes the DISABLE_GRANT_OPTIONS flag, which has
       the same effect. The capability is available as of MySQL
       5.1.15.

     * This option allows MySQL Community Server features to be
       enabled. Additional options may be required for individual
       features, such as --enable-profiling to enable statement
       profiling. This option was added in MySQL 5.1.24. It is
       enabled by default as of MySQL 5.1.28; to disable it, use
       --disable-community-features.

     * When given with --enable-community-features, the
       --enable-profiling option enables the statement profiling
       capability exposed by the SHOW PROFILE and SHOW PROFILES
       statements. (See Section 12.4.5.33, "SHOW PROFILES Syntax.")
       This option was added in MySQL 5.1.24. It is enabled by
       default as of MySQL 5.1.28; to disable it, use
       --disable-profiling.

     * See Section 2.1, "General Installation Guidance," for options
       that pertain to particular operating systems.

     * See Section 5.5.6.2, "Using SSL Connections," for options that
       pertain to configuring MySQL to support secure (encrypted)
       connections.

     * Several configure options apply to plugin selection and
       building:
--with-plugins=PLUGIN[,PLUGIN]...
--with-plugins=GROUP
--with-plugin-PLUGIN
--without-plugin-PLUGIN
       PLUGIN is an individual plugin name such as csv or archive.
       As shorthand, GROUP is a configuration group name such as none
       (select no plugins) or all (select all plugins).
       You can build a plugin as static (compiled into the server) or
       dynamic (built as a dynamic library that must be installed
       using the INSTALL PLUGIN statement before it can be used).
       Some plugins might not support static or dynamic build.
       configure --help shows the following information pertaining to
       plugins:

          + The plugin-related options

          + The names of all available plugins

          + For each plugin, a description of its purpose, which
            build types it supports (static or dynamic), and which
            plugin groups it is a part of.
       --with-plugins can take a list of one or more plugin names
       separated by commas, or a plugin group name. The named plugins
       are configured to be built as static plugins.
       --with-plugin-PLUGIN configures the given plugin to be built
       as a static plugin.
       --without-plugin-PLUGIN disables the given plugin from being
       built.
       If a plugin is named both with a --with and --without option,
       the result is undefined.
       For any plugin that is not explicitly selected or disabled, it
       is selected to be built dynamically if it supports dynamic
       build, and not built if it does not support dynamic build.
       (Thus, in the case that no plugin options are given, all
       plugins that support dynamic build are selected to be built as
       dynamic plugins. Plugins that do not support dynamic build are
       not built.)

2.3.3. Installing from the Development Source Tree

Caution

   You should read this section only if you are interested in helping
   us test our new code. If you just want to get MySQL up and running
   on your system, you should use a standard release distribution
   (either a binary or source distribution).

   To obtain the most recent development source tree, you must have
   Bazaar installed. You can obtain Bazaar from the Bazaar VCS Web
   site (http://bazaar-vcs.org). Bazaar is supported by any platform
   that supports Python, and is therefore compatible with any Linux,
   Unix, Windows or Mac OS X host. Instructions for downloading and
   installing Bazaar on the different platforms are available on the
   Bazaar Web site.

   All MySQL projects are hosted on Launchpad
   (http://launchpad.net/). MySQL projects, including MySQL server,
   MySQL Workbench, and others are available from the Sun/MySQL
   Engineering (http://launchpad.net/~mysql) page. For the
   repositories related only to MySQL server, see the MySQL Server
   (http://launchpad.net/mysql-server) page.

   To build under Unix/Linux, you must have the following tools
   installed:

     * GNU make, available from http://www.gnu.org/software/make/.
       Although some platforms come with their own make
       implementations, it is highly recommended that you use GNU
       make. It may already be available on your system as gmake.

     * autoconf 2.58 (or newer), available from
       http://www.gnu.org/software/autoconf/.

     * automake 1.8.1, available from
       http://www.gnu.org/software/automake/.

     * libtool 1.5, available from
       http://www.gnu.org/software/libtool/.

     * m4, available from http://www.gnu.org/software/m4/.

     * bison, available from http://www.gnu.org/software/bison/. You
       should use the latest version of bison where possible. Version
       1.75 and version 2.1 are known to work. There have been
       reported problems with bison 1.875. If you experience
       problems, upgrade to a later, rather than earlier, version.
       Versions of bison older than 1.75 may report this error:
sql_yacc.yy:#####: fatal error: maximum table size (32767) exceeded
       The maximum table size is not actually exceeded; the error is
       caused by bugs in older versions of bison.

   To build under Windows you must have Microsoft Visual C++ 2005
   Express Edition, Visual Studio .Net 2003 (7.1), or Visual Studio
   2005 (8.0) compiler system.

   Once the necessary tools are installed, you must create a local
   branch of the MySQL source code on your machine:

    1. To obtain a copy of the MySQL source code, you must create a
       new Bazaar branch. If you do not already have a Bazaar
       repository directory set up, you need to initialize a new
       directory:
shell> mkdir mysql-server
shell> bzr init-repo --trees mysql-server

    2. Once you have an initialized directory, you can branch from
       the public MySQL server repositories to create a local source
       tree. To create a branch of a specific version:
shell> cd mysql-server
shell> bzr branch lp:mysql-server/5.1 mysql-5.1

    3. The initial download will take some time to complete,
       depending on the speed of your connection. Please be patient.
       Once you have downloaded the first tree, additional trees
       should take significantly less time to download.

    4. When building from the Bazaar branch, you may want to create a
       copy of your active branch so that you can make configuration
       and other changes without affecting the original branch
       contents. You can achieve this by branching from the original
       branch:
shell> bzr branch mysql-5.1 mysql-5.1-build

    5. To obtain changes made after you have set up the branch
       initially, update it using the pull option periodically. Use
       this command in the top-level directory of the local copy:
shell> bzr pull
       You can examine the changeset comments for the tree by using
       the log option to bzr:
shell> bzr log
       You can also browse changesets, comments, and source code
       online. To browse this information for MySQL 5.1, go to the
       Launchpad MySQL Server (http://launchpad.net/mysql-server)
       page.
       If you see diffs (changes) or code that you have a question
       about, do not hesitate to send email to the MySQL internals
       mailing list. See Section 1.6.1, "MySQL Mailing Lists." Also,
       if you think you have a better idea on how to do something,
       send an email message to the list with a patch.

   After you have the local branch, you can build MySQL server from
   the source code. On Windows, the build process is different from
   Unix/Linux: see Section 2.5.10, "Installing MySQL from Source on
   Windows."

   On Unix/Linux, use the autoconf system to create the configure
   script so that you can configure the build environment before
   building. The following example shows the typical commands
   required to build MySQL from a source tree.

    1. Change location to the top-level directory of the source tree;
       replace mysql-5.1 with the appropriate directory name.
shell> cd mysql-5.1

    2. Prepare the source tree for configuration.
       Prior to MySQL 5.1.12, you must separately configure the
       InnoDB storage engine. Run the following command from the main
       source directory:
shell> (cd storage/innobase; autoreconf --force --install)
       You can omit the previous command for MySQL 5.1.12 and later,
       or if you do not require InnoDB support.
       Prepare the remainder of the source tree:
shell> autoreconf --force --install
       As an alternative to the preceding autoreconf command, you can
       use BUILD/autorun.sh, which acts as a shortcut for the
       following sequence of commands:
shell> aclocal; autoheader
shell> libtoolize --automake --force
shell> automake --force --add-missing; autoconf
       If you get some strange errors during this stage, verify that
       you have the correct version of libtool installed.

    3. Configure the source tree and compile MySQL:
shell> ./configure  # Add your favorite options here
shell> make
       For a description of some configure options, see Section
       2.3.2, "Typical configure Options."
       A collection of our standard configuration scripts is located
       in the BUILD/ subdirectory. For example, you may find it more
       convenient to use the BUILD/compile-pentium-debug script than
       the preceding set of shell commands. To compile on a different
       architecture, modify the script by removing flags that are
       Pentium-specific, or use another script that may be more
       appropriate. These scripts are provided on an "as-is" basis.
       They are not officially maintained and their contents may
       change from release to release.

    4. When the build is done, run make install. Be careful with this
       on a production machine; the command may overwrite your live
       release installation. If you already have MySQL installed and
       do not want to overwrite it, run ./configure with values for
       the --prefix, --with-tcp-port, and --with-unix-socket-path
       options different from those used for your production server.

    5. Play hard with your new installation and try to make the new
       features crash. Start by running make test. See Section
       22.1.2, "MySQL Test Suite."

    6. If you have gotten to the make stage, but the distribution
       does not compile, please enter the problem into our bugs
       database using the instructions given in Section 1.7, "How to
       Report Bugs or Problems." If you have installed the latest
       versions of the required GNU tools, and they crash trying to
       process our configuration files, please report that also.
       However, if you get a command not found error or a similar
       problem for aclocal, configure, or other required tools, do
       not report it. Instead, make sure that all the required tools
       are installed and that your PATH variable is set correctly so
       that your shell can find them.

2.3.4. Dealing with Problems Compiling MySQL

   All MySQL programs compile cleanly for us with no warnings on
   Solaris or Linux using gcc. On other systems, warnings may occur
   due to differences in system include files. See Section 2.3.5,
   "MIT-pthreads Notes," for warnings that may occur when using
   MIT-pthreads. For other problems, check the following list.

   The solution to many problems involves reconfiguring. If you do
   need to reconfigure, take note of the following:

     * If configure is run after it has previously been run, it may
       use information that was gathered during its previous
       invocation. This information is stored in config.cache. When
       configure starts up, it looks for that file and reads its
       contents if it exists, on the assumption that the information
       is still correct. That assumption is invalid when you
       reconfigure.

     * Each time you run configure, you must run make again to
       recompile. However, you may want to remove old object files
       from previous builds first because they were compiled using
       different configuration options.

   To prevent old configuration information or object files from
   being used, run these commands before re-running configure:
shell> rm config.cache
shell> make clean

   Alternatively, you can run make distclean.

   The following list describes some of the problems when compiling
   MySQL that have been found to occur most often:

     * If you get errors such as the ones shown here when compiling
       sql_yacc.cc, you probably have run out of memory or swap
       space:
Internal compiler error: program cc1plus got fatal signal 11
Out of virtual memory
Virtual memory exhausted
       The problem is that gcc requires a huge amount of memory to
       compile sql_yacc.cc with inline functions. Try running
       configure with the --with-low-memory option:
shell> ./configure --with-low-memory
       This option causes -fno-inline to be added to the compile line
       if you are using gcc and -O0 if you are using something else.
       You should try the --with-low-memory option even if you have
       so much memory and swap space that you think you can't
       possibly have run out. This problem has been observed to occur
       even on systems with generous hardware configurations, and the
       --with-low-memory option usually fixes it.

     * By default, configure picks c++ as the compiler name and GNU
       c++ links with -lg++. If you are using gcc, that behavior can
       cause problems during configuration such as this:
configure: error: installation or configuration problem:
C++ compiler cannot create executables.
       You might also observe problems during compilation related to
       g++, libg++, or libstdc++.
       One cause of these problems is that you may not have g++, or
       you may have g++ but not libg++, or libstdc++. Take a look at
       the config.log file. It should contain the exact reason why
       your C++ compiler didn't work. To work around these problems,
       you can use gcc as your C++ compiler. Try setting the
       environment variable CXX to "gcc -O3". For example:
shell> CXX="gcc -O3" ./configure
       This works because gcc compiles C++ source files as well as
       g++ does, but does not link in libg++ or libstdc++ by default.
       Another way to fix these problems is to install g++, libg++,
       and libstdc++. However, do not use libg++ or libstdc++ with
       MySQL because this only increases the binary size of mysqld
       without providing any benefits. Some versions of these
       libraries have also caused strange problems for MySQL users in
       the past.

     * If your compile fails with errors such as any of the
       following, you must upgrade your version of make to GNU make:
making all in mit-pthreads
make: Fatal error in reader: Makefile, line 18:
Badly formed macro assignment
       Or:
make: file `Makefile' line 18: Must be a separator (:
       Or:
pthread.h: No such file or directory
       Solaris and FreeBSD are known to have troublesome make
       programs.
       GNU make 3.75 is known to work.

     * If you want to define flags to be used by your C or C++
       compilers, do so by adding the flags to the CFLAGS and
       CXXFLAGS environment variables. You can also specify the
       compiler names this way using CC and CXX. For example:
shell> CC=gcc
shell> CFLAGS=-O3
shell> CXX=gcc
shell> CXXFLAGS=-O3
shell> export CC CFLAGS CXX CXXFLAGS
       See Section 2.2, "Installing MySQL from Generic Binaries on
       Unix/Linux," for a list of flag definitions that have been
       found to be useful on various systems.

     * If you get errors such as those shown here when compiling
       mysqld, configure did not correctly detect the type of the
       last argument to accept(), getsockname(), or getpeername():
cxx: Error: mysqld.cc, line 645: In this statement, the referenced
     type of the pointer value ''length'' is ''unsigned long'',
     which is not compatible with ''int''.
new_sock = accept(sock, (struct sockaddr *)&cAddr, &length);
       To fix this, edit the config.h file (which is generated by
       configure). Look for these lines:
/* Define as the base type of the last arg to accept */
#define SOCKET_SIZE_TYPE XXX
       Change XXX to size_t or int, depending on your operating
       system. (You must do this each time you run configure because
       configure regenerates config.h.)

     * The sql_yacc.cc file is generated from sql_yacc.yy. Normally,
       the build process does not need to create sql_yacc.cc because
       MySQL comes with a pre-generated copy. However, if you do need
       to re-create it, you might encounter this error:
"sql_yacc.yy", line xxx fatal: default action causes potential...
       This is a sign that your version of yacc is deficient. You
       probably need to install bison (the GNU version of yacc) and
       use that instead.

     * On Debian Linux 3.0, you need to install gawk instead of the
       default mawk.

     * If you need to debug mysqld or a MySQL client, run configure
       with the --with-debug option, and then recompile and link your
       clients with the new client library. See MySQL Internals:
       Porting (http://forge.mysql.com/wiki/MySQL_Internals_Porting).

     * If you get a compilation error on Linux (for example, SuSE
       Linux 8.1 or Red Hat Linux 7.3) similar to the following one,
       you probably do not have g++ installed:
libmysql.c:1329: warning: passing arg 5 of `gethostbyname_r' from
incompatible pointer type
libmysql.c:1329: too few arguments to function `gethostbyname_r'
libmysql.c:1329: warning: assignment makes pointer from integer
without a cast
make[2]: *** [libmysql.lo] Error 1
       By default, the configure script attempts to determine the
       correct number of arguments by using g++ (the GNU C++
       compiler). This test yields incorrect results if g++ is not
       installed. There are two ways to work around this problem:

          + Make sure that the GNU C++ g++ is installed. On some
            Linux distributions, the required package is called gpp;
            on others, it is named gcc-c++.

          + Use gcc as your C++ compiler by setting the CXX
            environment variable to gcc:
export CXX="gcc"
       You must run configure again after making either of those
       changes.

2.3.5. MIT-pthreads Notes

   This section describes some of the issues involved in using
   MIT-pthreads.

   On Linux, you should not use MIT-pthreads. Use the installed
   LinuxThreads implementation instead. See Section 2.6, "Installing
   MySQL on Linux."

   If your system does not provide native thread support, you should
   build MySQL using the MIT-pthreads package. This includes older
   FreeBSD systems, SunOS 4.x, Solaris 2.4 and earlier, and some
   others. See Section 2.1, "General Installation Guidance."

   MIT-pthreads is not part of the MySQL 5.1 source distribution. If
   you require this package, you need to download it separately from
   http://dev.mysql.com/Downloads/Contrib/pthreads-1_60_beta6-mysql.t
   ar.gz

   After downloading, extract this source archive into the top level
   of the MySQL source directory. It creates a new subdirectory named
   mit-pthreads.

     * On most systems, you can force MIT-pthreads to be used by
       running configure with the --with-mit-threads option:
shell> ./configure --with-mit-threads
       Building in a nonsource directory is not supported when using
       MIT-pthreads because we want to minimize our changes to this
       code.

     * The checks that determine whether to use MIT-pthreads occur
       only during the part of the configuration process that deals
       with the server code. If you have configured the distribution
       using --without-server to build only the client code, clients
       do not know whether MIT-pthreads is being used and use Unix
       socket file connections by default. Because Unix socket files
       do not work under MIT-pthreads on some platforms, this means
       you need to use -h or --host with a value other than localhost
       when you run client programs.

     * When MySQL is compiled using MIT-pthreads, system locking is
       disabled by default for performance reasons. You can tell the
       server to use system locking with the --external-locking
       option. This is needed only if you want to be able to run two
       MySQL servers against the same data files, but that is not
       recommended, anyway.

     * Sometimes the pthread bind() command fails to bind to a socket
       without any error message (at least on Solaris). The result is
       that all connections to the server fail. For example:
shell> mysqladmin version
mysqladmin: connect to server at '' failed;
error: 'Can't connect to mysql server on localhost (146)'
       The solution to this problem is to kill the mysqld server and
       restart it. This has happened to us only when we have forcibly
       stopped the server and restarted it immediately.

     * With MIT-pthreads, the sleep() system call isn't interruptible
       with SIGINT (break). This is noticeable only when you run
       mysqladmin --sleep. You must wait for the sleep() call to
       terminate before the interrupt is served and the process
       stops.

     * When linking, you might receive warning messages like these
       (at least on Solaris); they can be ignored:
ld: warning: symbol `_iob' has differing sizes:
    (file /my/local/pthreads/lib/libpthread.a(findfp.o) value=0x4;
file /usr/lib/libc.so value=0x140);
    /my/local/pthreads/lib/libpthread.a(findfp.o) definition taken
ld: warning: symbol `__iob' has differing sizes:
    (file /my/local/pthreads/lib/libpthread.a(findfp.o) value=0x4;
file /usr/lib/libc.so value=0x140);
    /my/local/pthreads/lib/libpthread.a(findfp.o) definition taken

     * Some other warnings also can be ignored:
implicit declaration of function `int strtoll(...)'
implicit declaration of function `int strtoul(...)'

     * We have not been able to make readline work with MIT-pthreads.
       (This is not necessary, but may be of interest to some.)

2.4. Upgrading or Downgrading MySQL

2.4.1. Upgrading MySQL

   As a general rule, to upgrade from one release series to another,
   you should go to the next series rather than skipping a series. To
   upgrade from a release series previous to MySQL 5.0, upgrade to
   each successive release series in turn until you have reached
   MySQL 5.0, and then proceed with the upgrade to MySQL 5.1. For
   example, if you currently are running MySQL 4.0 and wish to
   upgrade to a newer series, upgrade to MySQL 4.1 first before
   upgrading to 5.0, and so forth. For information on upgrading to
   MySQL 5.0, see the MySQL 5.0 Reference Manual; for earlier
   releases, see the MySQL 3.23, 4.0, 4.1 Reference Manual.

   If you perform a binary (in-place) upgrade without dumping and
   reloading tables, you cannot upgrade directly from MySQL 4.1 to
   5.1. This occurs due to an incompatible change in the MyISAM table
   index format in MySQL 5.0. Upgrade from MySQL 4.1 to 5.0 and
   repair all MyISAM tables (see Section 2.4.4, "Rebuilding or
   Repairing Tables or Indexes"). Then upgrade from MySQL 5.0 to 5.1
   and check and repair your tables.

   To upgrade from MySQL 5.0 to 5.1, use the items in the following
   checklist as a guide:

     * Before any upgrade, back up your databases, including the
       mysql database that contains the grant tables. See Section
       6.2, "Database Backup Methods."

     * Read all the notes in Section 2.4.1.1, "Upgrading from MySQL
       5.0 to 5.1." These notes enable you to identify upgrade issues
       that apply to your current MySQL installation. Some
       incompatibilities discussed in that section require your
       attention before upgrading. Others should be dealt with after
       upgrading.

     * Read Appendix C, "MySQL Change History" as well, which
       provides information about features that are new in MySQL 5.1
       or differ from those found in MySQL 5.0.

     * After you upgrade to a new version of MySQL, run mysql_upgrade
       (see Section 4.4.8, "mysql_upgrade --- Check Tables for MySQL
       Upgrade"). This program checks your tables, and attempts to
       repair them if necessary. It also updates your grant tables to
       make sure that they have the current structure so that you can
       take advantage of any new capabilities. (Some releases of
       MySQL introduce changes to the structure of the grant tables
       to add new privileges or features.)

     * If you are running MySQL Server on Windows, see Section 2.5.7,
       "Upgrading MySQL on Windows."

     * If you are using replication, see Section 16.4.3, "Upgrading a
       Replication Setup," for information on upgrading your
       replication setup.

     * If you are upgrading an installation originally produced by
       installing multiple RPM packages, it is best to upgrade all
       the packages, not just some. For example, if you previously
       installed the server and client RPMs, do not upgrade just the
       server RPM.

     * As of MySQL 5.1.9, the mysqld-max server is included in binary
       distributions. There is no separate MySQL-Max distribution. As
       of MySQL 5.1.12, there is no mysqld-max server at all in
       binary distributions. They contain a server that includes the
       features previously included in mysqld-max.

     * If you have created a user-defined function (UDF) with a given
       name and upgrade MySQL to a version that implements a new
       built-in function with the same name, the UDF becomes
       inaccessible. To correct this, use DROP FUNCTION to drop the
       UDF, and then use CREATE FUNCTION to re-create the UDF with a
       different nonconflicting name. The same is true if the new
       version of MySQL implements a built-in function with the same
       name as an existing stored function. See Section 8.2.4,
       "Function Name Parsing and Resolution," for the rules
       describing how the server interprets references to different
       kinds of functions.

   You can always move the MySQL format files and data files between
   different versions on systems with the same architecture as long
   as you stay within versions for the same release series of MySQL.

   If you are cautious about using new versions, you can always
   rename your old mysqld before installing a newer one. For example,
   if you are using MySQL 5.0.13 and want to upgrade to 5.1.10,
   rename your current server from mysqld to mysqld-5.0.13. If your
   new mysqld then does something unexpected, you can simply shut it
   down and restart with your old mysqld.

   If, after an upgrade, you experience problems with recompiled
   client programs, such as Commands out of sync or unexpected core
   dumps, you probably have used old header or library files when
   compiling your programs. In this case, you should check the date
   for your mysql.h file and libmysqlclient.a library to verify that
   they are from the new MySQL distribution. If not, recompile your
   programs with the new headers and libraries.

   If problems occur, such as that the new mysqld server does not
   start or that you cannot connect without a password, verify that
   you do not have an old my.cnf file from your previous
   installation. You can check this with the --print-defaults option
   (for example, mysqld --print-defaults). If this command displays
   anything other than the program name, you have an active my.cnf
   file that affects server or client operation.

   If your MySQL installation contains a large amount of data that
   might take a long time to convert after an in-place upgrade, you
   might find it useful to create a "dummy" database instance for
   assessing what conversions might be needed and the work involved
   to perform them. Make a copy of your MySQL instance that contains
   a full copy of the mysql database, plus all other databases
   without data. Run your upgrade procedure on this dummy instance to
   see what actions might be needed so that you can better evaluate
   the work involved when performing actual data conversion on your
   original database instance.

   It is a good idea to rebuild and reinstall the Perl DBD::mysql
   module whenever you install a new release of MySQL. The same
   applies to other MySQL interfaces as well, such as PHP mysql
   extensions and the Python MySQLdb module.

2.4.1.1. Upgrading from MySQL 5.0 to 5.1

   After upgrading a 5.0 installation to 5.0.10 or above, it is
   necessary to upgrade your grant tables. Otherwise, creating stored
   procedures and functions might not work. To perform this upgrade,
   run mysql_upgrade.

Note

   It is good practice to back up your data before installing any new
   version of software. Although MySQL works very hard to ensure a
   high level of quality, you should protect your data by making a
   backup.

   To upgrade to 5.1 from any previous version, MySQL recommends that
   you dump your tables with mysqldump before upgrading and reload
   the dump file after upgrading.

   If you perform a binary (in-place) upgrade without dumping and
   reloading tables, you cannot upgrade directly from MySQL 4.1 to
   5.1. This occurs due to an incompatible change in the MyISAM table
   index format in MySQL 5.0. Upgrade from MySQL 4.1 to 5.0 and
   repair all MyISAM tables (see Section 2.4.4, "Rebuilding or
   Repairing Tables or Indexes"). Then upgrade from MySQL 5.0 to 5.1
   and check and repair your tables.

   In general, you should do the following when upgrading from MySQL
   5.0 to 5.1:

     * Read all the items in the following sections to see whether
       any of them might affect your applications:

          + Section 2.4.1, "Upgrading MySQL," has general update
            information.

          + The items in the change lists found later in this section
            enable you to identify upgrade issues that apply to your
            current MySQL installation.

          + The MySQL 5.1 change history describes significant new
            features you can use in 5.1 or that differ from those
            found in MySQL 5.0. Some of these changes may result in
            incompatibilities. See Section C.1, "Changes in Release
            5.1.x (Production)."

     * Note particularly any changes that are marked Known issue or
       Incompatible change. These incompatibilities with earlier
       versions of MySQL may require your attention before you
       upgrade.
       Our aim is to avoid these changes, but occasionally they are
       necessary to correct problems that would be worse than an
       incompatibility between releases. If any upgrade issue
       applicable to your installation involves an incompatibility
       that requires special handling, follow the instructions given
       in the incompatibility description. Often this will involve a
       dump and reload, or use of a statement such as CHECK TABLE or
       REPAIR TABLE.
       For dump and reload instructions, see Section 2.4.4,
       "Rebuilding or Repairing Tables or Indexes." Any procedure
       that involves REPAIR TABLE with the USE_FRM option must be
       done before upgrading. Use of this statement with a version of
       MySQL different from the one used to create the table (that
       is, using it after upgrading) may damage the table. See
       Section 12.4.2.6, "REPAIR TABLE Syntax."

     * After you upgrade to a new version of MySQL, run mysql_upgrade
       (see Section 4.4.8, "mysql_upgrade --- Check Tables for MySQL
       Upgrade"). This program checks your tables, and attempts to
       repair them if necessary. It also updates your grant tables to
       make sure that they have the current structure so that you can
       take advantage of any new capabilities. (Some releases of
       MySQL introduce changes to the structure of the grant tables
       to add new privileges or features.)

     * Check Section 2.4.3, "Checking Whether Tables or Indexes Must
       Be Rebuilt," to see whether changes to table formats or to
       character sets or collations were made between your current
       version of MySQL and the version to which you are upgrading.
       If so and these changes result in an incompatibility between
       MySQL versions, you will need to upgrade the affected tables
       using the instructions in Section 2.4.4, "Rebuilding or
       Repairing Tables or Indexes."

     * If you are running MySQL Server on Windows, see Section 2.5.7,
       "Upgrading MySQL on Windows."

     * If you are using replication, see Section 16.4.3, "Upgrading a
       Replication Setup," for information on upgrading your
       replication setup.

   If your MySQL installation contains a large amount of data that
   might take a long time to convert after an in-place upgrade, you
   might find it useful to create a "dummy" database instance for
   assessing what conversions might be needed and the work involved
   to perform them. Make a copy of your MySQL instance that contains
   a full copy of the mysql database, plus all other databases
   without data. Run your upgrade procedure on this dummy instance to
   see what actions might be needed so that you can better evaluate
   the work involved when performing actual data conversion on your
   original database instance.

   MySQL Enterprise MySQL Enterprise subscribers will find more
   information about upgrading in the Knowledge Base articles found
   at Upgrading
   (https://kb.mysql.com/search.php?cat=search&category=41). Access
   to the MySQL Knowledge Base collection of articles is one of the
   advantages of subscribing to MySQL Enterprise. For more
   information, see
   http://www.mysql.com/products/enterprise/advisors.html.

   The following lists describe changes that may affect applications
   and that you should watch out for when upgrading to MySQL 5.1.

   Configuration Changes:

     * Before MySQL 5.1.11, to build MySQL from source with SSL
       support enabled, you would invoke configure with either the
       --with-openssl or --with-yassl option. In MySQL 5.1.11, those
       options both have been replaced by the --with-ssl option. By
       default, --with-ssl causes the bundled yaSSL library to be
       used. To select OpenSSL instead, give the option as
       --with-ssl=path, where path is the directory where the OpenSSL
       header files and libraries are located.

   Server Changes:

     * Known issue: After a binary upgrade to MySQL 5.1 from a MySQL
       5.0 installation that contains ARCHIVE tables, accessing those
       tables will cause the server to crash, even if you have run
       mysql_upgrade or CHECK TABLE ... FOR UPGRADE. To work around
       this problem, use mysqldump to dump all ARCHIVE tables before
       upgrading, and reload them into MySQL 5.1 after upgrading.

     * Known issue: The fix for
       Bug#23491: http://bugs.mysql.com/bug.php?id=23491 introduced a
       problem with SHOW CREATE VIEW, which is used by mysqldump.
       This causes an incompatibility when upgrading from versions
       affected by that bug fix (MySQL 5.0.40 through 5.0.43, MySQL
       5.1.18 through 5.1.19): If you use mysqldump before upgrading
       from an affected version and reload the data after upgrading
       to a higher version, you must drop and recreate your views.

     * Known issue: Dumps performed by using mysqldump to generate a
       dump file before the upgrade and reloading the file after
       upgrading are subject to the following problem:
       Before MySQL 5.0.40, mysqldump displays SPATIAL index
       definitions using prefix lengths for the indexed columns.
       These prefix lengths are accepted in MySQL 5.0, but not as of
       MySQL 5.1. If you use mysqldump from versions of MySQL older
       than 5.0.40, any table containing SPATIAL indexes will cause
       an error when the dump file is reloaded into MySQL 5.1 or
       higher.
       For example, a table definition might look like this when
       dumped in MySQL 5.0:
CREATE TABLE `t` (
 `g` geometry NOT NULL,
 SPATIAL KEY `g` (`g`(32))
) ENGINE=MyISAM DEFAULT CHARSET=latin1
       The SPATIAL index definition will not be accepted in MySQL
       5.1. To work around this, edit the dump file to remove the
       prefix:
CREATE TABLE `t` (
 `g` geometry NOT NULL,
 SPATIAL KEY `g` (`g`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1
       Dump files can be large, so it may be preferable to dump table
       definitions and data separately to make it easier to edit the
       definitions:
shell> mysqldump --no-data other_args > definitions.sql
shell> mysqldump --no-create-info other_args > data.sql
       Then edit definitions.sql before reloading definitions.sql and
       data.sql, in that order.
       If you upgrade to a version of MySQL 5.0 higher than 5.0.40
       before upgrading to MySQL 5.1, this problem does not occur.

     * Known issue: Before MySQL 5.1.30, the CHECK TABLE ... FOR
       UPGRADE statement did not check for incompatible collation
       changes made in MySQL 5.1.24. (This also affects mysqlcheck
       and mysql_upgrade, which cause that statement to be executed.)
       Prior to the fix made in 5.1.30, a binary upgrade (performed
       without dumping tables with mysqldump before the upgrade and
       reloading the dump file after the upgrade) would corrupt
       tables. After the fix, CHECK TABLE ... FOR UPGRADE properly
       detects the problem and warns about tables that need repair.
       However, the fix is not backward compatible and can result in
       a downgrading problem under these circumstances:

         1. Perform a binary upgrade to a version of MySQL that
            includes the fix.

         2. Run CHECK TABLE ... FOR UPGRADE (or mysqlcheck or
            mysql_upgrade) to upgrade tables.

         3. Perform a binary downgrade to a version of MySQL that
            does not include the fix.
       The solution is to dump tables with mysqldump before the
       downgrade and reload the dump file after the downgrade.
       Alternatively, drop and recreate affected indexes.

     * Known issue: MySQL introduces encoding for table names that
       have non-ASCII characters (see Section 8.2.3, "Mapping of
       Identifiers to File Names"). After a binary upgrade from MySQL
       5.0 to 5.1 or higher, the server recognizes names that have
       non-ASCII characters and adds a #mysql50# prefix to them.
       As of MySQL 5.1.31, mysql_upgrade encodes these names by
       executing the following command:
mysqlcheck --all-databases --check-upgrade --fix-db-names --fix-table
-names
       Prior to MySQL 5.1.31, mysql_upgrade does not execute this
       command, so you should execute it manually if you have
       database or table names that contain nonalphanumeric
       characters.
       Prior to MySQL 5.1.23, the mysqlcheck command does not perform
       the name encoding for views. To work around this problem, drop
       each affected view and recreate it.
       mysqlcheck cannot fix names that contain literal instances of
       the @ character that is used for encoding special characters.
       If you have databases or tables that contain this character,
       use mysqldump to dump them before upgrading to MySQL 5.1, and
       then reload the dump file after upgrading.

     * Known issue: When upgrading from MySQL 5.0 to versions of 5.1
       prior to 5.1.23, running mysqlcheck (or mysql_upgrade, which
       runs mysqlcheck) to upgrade tables fails for names that must
       be written as quoted identifiers. To work around this problem,
       rename each affected table to a name that does not require
       quoting:
RENAME TABLE `tab``le_a` TO table_a;
RENAME TABLE `table b` TO table_b;
       After renaming the tables, run the mysql_upgrade program. Then
       rename the tables back to their original names:
RENAME TABLE table_a TO `tab``le_a`;
RENAME TABLE table_b TO `table b`;

     * Known issue: In connection with view creation, the server
       created arc directories inside database directories and
       maintained useless copies of .frm files there. Creation and
       renaming procedures of those copies as well as creation of arc
       directories has been discontinued in MySQL 5.1.29.
       This change does cause a problem when downgrading to older
       server versions which manifests itself under these
       circumstances:

         1. Create a view v_orig in MySQL 5.1.29 or higher.

         2. Rename the view to v_new and then back to v_orig.

         3. Downgrade to an older 5.1.x server and run mysql_upgrade.

         4. Try to rename v_orig to v_new again. This operation
            fails.
       As a workaround to avoid this problem, use either of these
       approaches:

          + Dump your data using mysqldump before downgrading and
            reload the dump file after downgrading.

          + Instead of renaming a view after the downgrade, drop it
            and recreate it.

     * Incompatible change: Character set or collation changes were
       made in MySQL 5.1.21, 5.1.23, and 5.1.24 that may require
       table indexes to be rebuilt. For details, see Section 2.4.3,
       "Checking Whether Tables or Indexes Must Be Rebuilt."

     * Incompatible change: MySQL 5.1 implements support for a plugin
       API that allows the loading and unloading of components at
       runtime, without restarting the server. Section 22.2, "The
       MySQL Plugin API." The plugin API requires the mysql.plugin
       table. After upgrading from an older version of MySQL, you
       should run the mysql_upgrade command to create this table. See
       Section 4.4.8, "mysql_upgrade --- Check Tables for MySQL
       Upgrade."
       Plugins are installed in the directory named by the plugin_dir
       system variable. This variable also controls the location from
       which the server loads user-defined functions (UDFs), which is
       a change from earlier versions of MySQL. That is, all UDF
       library files now must be installed in the plugin directory.
       When upgrading from an older version of MySQL, you must
       migrate your UDF files to the plugin directory.

     * Incompatible change: The table_cache system variable has been
       renamed to table_open_cache. Any scripts that refer to
       table_cache must be updated to use the new name.

     * Incompatible change: In MySQL 5.1.36, options for loading
       plugins such as pluggable storage engines were changed from
       boolean to tristate format. The implementations overlap, but
       if you previously used options of the form --plugin_name=0 or
       --plugin_name=1, you should instead use --plugin_name=OFF or
       --plugin_name=ON, respectively. For details, see Section
       5.1.3, "Server Options for Loading Plugins."

     * Incompatible change: From MySQL 5.1.24 to 5.1.31, the UPDATE
       statement was changed such that assigning NULL to a NOT NULL
       column caused an error even when strict SQL mode was not
       enabled. The original behavior before MySQL 5.1.24 was that
       such assignments caused an error only in strict SQL mode, and
       otherwise set the column to the implicit default value for the
       column data type and generated a warning. (For information
       about implicit default values, see Section 10.1.4, "Data Type
       Default Values.")
       The change caused compatibility problems for applications that
       relied on the original behavior. It also caused replication
       problems between servers that had the original behavior and
       those that did not, for applications that assigned NULL to NOT
       NULL columns in UPDATE statements without strict SQL mode
       enabled. The change was reverted in MySQL 5.1.32 so that
       UPDATE again had the original behavior. Problems can still
       occur if you replicate between servers that have the modified
       UPDATE behavior and those that do not.

     * Incompatible change: As of MySQL 5.1.29, the default binary
       logging mode has been changed from MIXED to STATEMENT for
       compatibility with MySQL 5.0.

     * Incompatible change: In MySQL 5.1.25, a change was made to the
       way that the server handles prepared statements. This affects
       prepared statements processed at the SQL level (using the
       PREPARE statement) and those processed using the binary
       client-server protocol (using the mysql_stmt_prepare() C API
       function).
       Previously, changes to metadata of tables or views referred to
       in a prepared statement could cause a server crash when the
       statement was next executed, or perhaps an error at execute
       time with a crash occurring later. For example, this could
       happen after dropping a table and recreating it with a
       different definition.
       Now metadata changes to tables or views referred to by
       prepared statements are detected and cause automatic
       repreparation of the statement when it is next executed.
       Metadata changes occur for DDL statements such as those that
       create, drop, alter, rename, or truncate tables, or that
       analyze, optimize, or repair tables. Repreparation also occurs
       after referenced tables or views are flushed from the table
       definition cache, either implicitly to make room for new
       entries in the cache, or explicitly due to FLUSH TABLES.
       Repreparation is automatic, but to the extent that it occurs,
       performance of prepared statements is diminished.
       Table content changes (for example, with INSERT or UPDATE) do
       not cause repreparation, nor do SELECT statements.
       An incompatibility with previous versions of MySQL is that a
       prepared statement may now return a different set of columns
       or different column types from one execution to the next. For
       example, if the prepared statement is SELECT * FROM t1,
       altering t1 to contain a different number of columns causes
       the next execution to return a number of columns different
       from the previous execution.
       Older versions of the client library cannot handle this change
       in behavior. For applications that use prepared statements
       with the new server, an upgrade to the new client library is
       strongly recommended.
       Along with this change to statement repreparation, the default
       value of the table_definition_cache system variable has been
       increased from 128 to 256. The purpose of this increase is to
       lessen the chance that prepared statements will need
       repreparation due to referred-to tables/views having been
       flushed from the cache to make room for new entries.
       A new status variable, Com_stmt_reprepare, has been introduced
       to track the number of repreparations.

     * Incompatible change: As of MySQL 5.1.23, within a stored
       routine, it is no longer allowable to declare a cursor for a
       SHOW or DESCRIBE statement. This happened to work in some
       instances, but is no longer supported. In many cases, a
       workaround for this change is to use the cursor with a SELECT
       query to read from an INFORMATION_SCHEMA table that produces
       the same information as the SHOW statement.

     * Incompatible change: SHOW CREATE VIEW displays view
       definitions using an AS alias_name clause for each column. If
       a column is created from an expression, the default alias is
       the expression text, which can be quite long. As of MySQL
       5.1.23, aliases for column names in CREATE VIEW statements are
       checked against the maximum column length of 64 characters
       (not the maximum alias length of 256 characters). As a result,
       views created from the output of SHOW CREATE VIEW fail if any
       column alias exceeds 64 characters. This can cause problems
       for replication or loading dump files. For additional
       information and workarounds, see Section D.4, "Restrictions on
       Views."

     * Incompatible change: Several issues were identified for stored
       programs (stored procedures and functions, triggers, and
       events) and views containing non-ASCII symbols. These issues
       involved conversion errors due to incomplete character set
       information when translating these objects to and from stored
       format.
       To address these problems, the representation for these
       objects was changed in MySQL 5.1.21. However, the fixes affect
       all stored programs and views. (For example, you will see
       warnings about "no creation context.") To avoid warnings from
       the server about the use of old definitions from any release
       prior to 5.1.21, you should dump stored programs and views
       with mysqldump after upgrading to 5.1.21 or higher, and then
       reload them to recreate them with new definitions. Invoke
       mysqldump with a --default-character-set option that names the
       non-ASCII character set that was used for the definitions when
       the objects were originally defined.

     * Incompatible change: As of MySQL 5.1.20, mysqld_safe supports
       error logging to syslog on systems that support the logger
       command. The new --syslog and --skip-syslog options can be
       used instead of the --log-error option to control logging
       behavior, as described in Section 4.3.2, "mysqld_safe ---
       MySQL Server Startup Script."
       In 5.1.21 and up, the default is --skip-syslog, which is
       compatible with the default behavior of writing an error log
       file for releases prior to 5.1.20.
       In 5.1.20 only, the following conditions apply: 1) The default
       is to use syslog, which is not compatible with releases prior
       to 5.1.20. 2) Logging to syslog may fail to operate correctly
       in some cases. For these reasons, avoid using MySQL 5.1.20.

     * Incompatible change: As of MySQL 5.1.18, the plugin interface
       and its handling of system variables was changed. Command-line
       options such as --skip-innodb now cause an error if InnoDB is
       not built-in or plugin-loaded. You should use
       --loose-skip-innodb if you do not want any error even if
       InnoDB is not available. The --loose prefix modifier should be
       used for all command-line options where you are uncertain
       whether the plugin exists and when you want the operation to
       proceed even if the option is necessarily ignored due to the
       absence of the plugin. (For a desecription of how --loose
       works, see Section 4.2.3.1, "Using Options on the Command
       Line.")

     * Incompatible change: As of MySQL 5.1.15, InnoDB rolls back
       only the last statement on a transaction timeout. A new
       option, --innodb_rollback_on_timeout, causes InnoDB to abort
       and roll back the entire transaction if a transaction timeout
       occurs (the same behavior as in MySQL 4.1).

     * Incompatible change: As of MySQL 5.1.15, the following
       conditions apply to enabling the read_only system variable:

          + If you attempt to enable read_only while you have any
            explicit locks (acquired with LOCK TABLES or have a
            pending transaction, an error will occur.

          + If other clients hold explicit table locks or have
            pending transactions, the attempt to enable read_only
            blocks until the locks are released and the transactions
            end. While the attempt to enable read_only is pending,
            requests by other clients for table locks or to begin
            transactions also block until read_only has been set.

          + read_only can be enabled while you hold a global read
            lock (acquired with FLUSH TABLES WITH READ LOCK) because
            that does not involve table locks.
       Previously, the attempt to enable read_only would return
       immediately even if explicit locks or transactions were
       pending, so some data changes could occur for statements
       executing in the server at the same time.

     * Incompatible change: The number of function names affected by
       IGNORE_SPACE was reduced significantly in MySQL 5.1.13, from
       about 200 to about 30. (For details about IGNORE_SPACE, see
       Section 8.2.4, "Function Name Parsing and Resolution.") This
       change improves the consistency of parser operation. However,
       it also introduces the possibility of incompatibility for old
       SQL code that relies on the following conditions:

          + IGNORE_SPACE is disabled.

          + The presence or absence of whitespace following a
            function name is used to distinguish between a built-in
            function and stored function that have the same name (for
            example, PI() versus PI ()).
       For functions that are no longer affected by IGNORE_SPACE as
       of MySQL 5.1.13, that strategy no longer works. Either of the
       following approaches can be used if you have code that is
       subject to the preceding incompatibility:

          + If a stored function has a name that conflicts with a
            built-in function, refer to the stored function with a
            schema name qualifier, regardless of whether whitespace
            is present. For example, write schema_name.PI() or
            schema_name.PI ().

          + Alternatively, rename the stored function to use a
            nonconflicting name and change invocations of the
            function to use the new name.

     * Incompatible change: For utf8 columns, the full-text parser
       incorrectly considered several nonword punctuation and
       whitespace characters as word characters, causing some
       searches to return incorrect results. The fix involves a
       change to the full-text parser in MySQL 5.1.12, so as of
       5.1.12, any tables that have FULLTEXT indexes on utf8 columns
       must be repaired with REPAIR TABLE:
REPAIR TABLE tbl_name QUICK;

     * Incompatible change: Storage engines can be pluggable at
       runtime, so the distinction between disabled and invalid
       storage engines no longer applies. As of MySQL 5.1.12, this
       affects the NO_ENGINE_SUBSTITUTION SQL mode, as described in
       Section 5.1.8, "Server SQL Modes."

     * Incompatible change: The structure of FULLTEXT indexes has
       been changed in MySQL 5.1.6. After upgrading to MySQL 5.1.6 or
       greater, any tables that have FULLTEXT indexes must be
       repaired with REPAIR TABLE:
REPAIR TABLE tbl_name QUICK;

     * Incompatible change: In MySQL 5.1.6, when log tables were
       implemented, the default log destination for the general query
       and slow query log was TABLE. As of MySQL 5.1.21, this default
       has been changed to FILE, which is compatible with MySQL 5.0,
       but incompatible with earlier releases of MySQL 5.1. If you
       are upgrading from MySQL 5.0 to 5.1.21 or higher, no logging
       option changes should be necessary. However, if you are
       upgrading from 5.1.6 through 5.1.20 to 5.1.21 or higher and
       were using TABLE logging, use the --log-output=TABLE option
       explicitly to preserve your server's table-logging behavior.

     * Incompatible change: For ENUM columns that had enumeration
       values containing commas, the commas were mapped to 0xff
       internally. However, this rendered the commas
       indistinguishable from true 0xff characters in the values.
       This no longer occurs. However, the fix requires that you dump
       and reload any tables that have ENUM columns containing true
       0xff in their values: Dump the tables using mysqldump with the
       current server before upgrading from a version of MySQL 5.1
       older than 5.1.15 to version 5.1.15 or newer.

     * As of MySQL 5.1.12, the lc_time_names system variable
       specifies the locale that controls the language used to
       display day and month names and abbreviations. This variable
       affects the output from the DATE_FORMAT(), DAYNAME() and
       MONTHNAME() functions. See Section 9.7, "MySQL Server Locale
       Support."

     * As of MySQL 5.1.9, mysqld_safe no longer implicitly invokes
       mysqld-max if it exists. Instead, it invokes mysqld unless a
       --mysqld or --mysqld-version option is given to specify
       another server explicitly. If you previously relied on the
       implicit invocation of mysqld-max, you should use an
       appropriate option now. As of MySQL 5.1.12, there is no longer
       any separate mysqld-max server, so no change should be
       necessary.

   SQL Changes:

     * Known issue: Prior to MySQL 5.1.17, the parser accepted
       invalid code in SQL condition handlers, leading to server
       crashes or unexpected execution behavior in stored programs.
       Specifically, the parser allowed a condition handler to refer
       to labels for blocks that enclose the handler declaration.
       This was incorrect because block label scope does not include
       the code for handlers declared within the labeled block.
       As of 5.1.17, the parser rejects this invalid construct, but
       if you perform a binary upgrade (without dumping and reloading
       your databases), existing handlers that contain the construct
       still are invalid and should be rewritten even if they appear
       to function as you expect.
       To find affected handlers, use mysqldump to dump all stored
       procedures and functions, triggers, and events. Then attempt
       to reload them into an upgraded server. Handlers that contain
       illegal label references will be rejected.
       For more information about condition handlers and writing them
       to avoid invalid jumps, see Section 12.7.4.2, "DECLARE for
       Handlers."

     * Incompatible change: The parser accepted statements that
       contained /* ... */ that were not properly closed with */,
       such as SELECT 1 /* + 2. As of MySQL 5.1.23, statements that
       contain unclosed /*-comments now are rejected with a syntax
       error.
       This fix has the potential to cause incompatibilities. Because
       of Bug#26302: http://bugs.mysql.com/bug.php?id=26302, which
       caused the trailing */ to be truncated from comments in views,
       stored routines, triggers, and events, it is possible that
       objects of those types may have been stored with definitions
       that now will be rejected as syntactically invalid. Such
       objects should be dropped and re-created so that their
       definitions do not contain truncated comments.

     * Incompatible change: Multiple-table DELETE statements
       containing ambiguous aliases could have unintended side
       effects such as deleting rows from the wrong table. Example:
DELETE FROM t1 AS a2 USING t1 AS a1 INNER JOIN t2 AS a2;
       As of MySQL 5.1.23, alias declarations can be declared only in
       the table_references part. Elsewhere in the statement, alias
       references are allowed but not alias declarations. Statements
       containing aliases that are no longer allowed must be
       rewritten.

     * Incompatible change: As of MySQL 5.1.8, TYPE = engine_name is
       still accepted as a synonym for the ENGINE = engine_name table
       option but generates a warning. You should note that this
       option is not available in MySQL 5.1.7, and is removed
       altogether as of MySQL 5.4 and produces a syntax error.
       TYPE has been deprecated since MySQL 4.0.

     * Incompatible change: The namespace for triggers changed in
       MySQL 5.0.10. Previously, trigger names had to be unique per
       table. Now they must be unique within the schema (database).
       An implication of this change is that DROP TRIGGER syntax now
       uses a schema name instead of a table name (schema name is
       optional and, if omitted, the current schema will be used).
       When upgrading from a version of MySQL 5 older than 5.0.10 to
       MySQL 5.0.10 or newer, you must drop all triggers and
       re-create them or DROP TRIGGER will not work after the
       upgrade. Here is a suggested procedure for doing this:

         1. Upgrade to MySQL 5.0.10 or later to be able to access
            trigger information in the INFORMATION_SCHEMA.TRIGGERS
            table. (This should work even for pre-5.0.10 triggers.)

         2. Dump all trigger definitions using the following SELECT
            statement:
SELECT CONCAT('CREATE TRIGGER ', t.TRIGGER_SCHEMA, '.', t.TRIGGER_NAM
E,
              ' ', t.ACTION_TIMING, ' ', t.EVENT_MANIPULATION, ' ON '
,
              t.EVENT_OBJECT_SCHEMA, '.', t.EVENT_OBJECT_TABLE,
              ' FOR EACH ROW ', t.ACTION_STATEMENT, '//' )
INTO OUTFILE '/tmp/triggers.sql'
FROM INFORMATION_SCHEMA.TRIGGERS AS t;
            The statement uses INTO OUTFILE, so you must have the
            FILE privilege. The file will be created on the server
            host. Use a different file name if you like. To be 100%
            safe, inspect the trigger definitions in the triggers.sql
            file, and perhaps make a backup of the file.

         3. Stop the server and drop all triggers by removing all
            .TRG files in your database directories. Change location
            to your data directory and issue this command:
shell> rm */*.TRG

         4. Start the server and re-create all triggers using the
            triggers.sql file:
mysql> delimiter // ;
mysql> source /tmp/triggers.sql //

         5. Check that all triggers were successfully created using
            the SHOW TRIGGERS statement.

     * Incompatible change: MySQL 5.1.6 introduces the TRIGGER
       privilege. Previously, the SUPER privilege was needed to
       create or drop triggers. Now those operations require the
       TRIGGER privilege. This is a security improvement because you
       no longer need to grant users the SUPER privilege to enable
       them to create triggers. However, the requirement that the
       account named in a trigger's DEFINER clause must have the
       SUPER privilege has changed to a requirement for the TRIGGER
       privilege. When upgrading from a previous version of MySQL 5.0
       or 5.1 to MySQL 5.1.6 or newer, be sure to update your grant
       tables by running mysql_upgrade. This will assign the TRIGGER
       privilege to all accounts that had the SUPER privilege. If you
       fail to update the grant tables, triggers may fail when
       activated. After updating the grant tables, you can revoke the
       SUPER privilege from those accounts that no longer otherwise
       require it.

     * Some keywords may be reserved in MySQL 5.1 that were not
       reserved in MySQL 5.0. See Section 8.3, "Reserved Words."

     * The BACKUP TABLE, and RESTORE TABLE statements are deprecated.
       mysqldump or mysqlhotcopy can be used as alternatives.

     * The LOAD DATA FROM MASTER and LOAD TABLE FROM MASTER
       statements are deprecated. See Section 12.5.2.2, "LOAD DATA
       FROM MASTER Syntax," for recommended alternatives.

     * The INSTALL PLUGIN and UNINSTALL PLUGIN statements that are
       used for the plugin API are new. So is the WITH PARSER clause
       for FULLTEXT index creation that associates a parser plugin
       with a full-text index. Section 22.2, "The MySQL Plugin API."

   C API Changes:

     * Incompatible change: As of MySQL 5.1.7, the
       mysql_stmt_attr_get() C API function returns a boolean rather
       than an unsigned int for STMT_ATTR_UPDATE_MAX_LENGTH.
       (Bug#16144: http://bugs.mysql.com/bug.php?id=16144)

2.4.2. Downgrading MySQL

   This section describes what you should do to downgrade to an older
   MySQL version in the unlikely case that the previous version
   worked better than the new one.

   If you are downgrading within the same release series (for
   example, from 5.0.13 to 5.0.12) the general rule is that you just
   have to install the new binaries on top of the old ones. There is
   no need to do anything with the databases. As always, however, it
   is always a good idea to make a backup.

   The following items form a checklist of things you should do
   whenever you perform a downgrade:

     * Read the upgrading section for the release series from which
       you are downgrading to be sure that it does not have any
       features you really need. See Section 2.4.1, "Upgrading
       MySQL."

     * If there is a downgrading section for that version, you should
       read that as well.

     * To see which new features were added between the version to
       which you are downgrading and your current version, see the
       change logs (Appendix C, "MySQL Change History").

     * Check Section 2.4.3, "Checking Whether Tables or Indexes Must
       Be Rebuilt," to see whether changes to table formats or to
       character sets or collations were made between your current
       version of MySQL and the version to which you are downgrading.
       If so and these changes result in an incompatibility between
       MySQL versions, you will need to downgrade the affected tables
       using the instructions in Section 2.4.4, "Rebuilding or
       Repairing Tables or Indexes."

   In most cases, you can move the MySQL format files and data files
   between different versions on the same architecture as long as you
   stay within versions for the same release series of MySQL.

   If you downgrade from one release series to another, there may be
   incompatibilities in table storage formats. In this case, use
   mysqldump to dump your tables before downgrading. After
   downgrading, reload the dump file using mysql or mysqlimport to
   re-create your tables. For examples, see Section 2.4.5, "Copying
   MySQL Databases to Another Machine."

   A typical symptom of a downward-incompatible table format change
   when you downgrade is that you cannot open tables. In that case,
   use the following procedure:

    1. Stop the older MySQL server that you are downgrading to.

    2. Restart the newer MySQL server you are downgrading from.

    3. Dump any tables that were inaccessible to the older server by
       using mysqldump to create a dump file.

    4. Stop the newer MySQL server and restart the older one.

    5. Reload the dump file into the older server. Your tables should
       be accessible.

   It might also be the case that system tables in the mysql database
   have changed and that downgrading introduces some loss of
   functionality or requires some adjustments. Here are some
   examples:

     * Trigger creation requires the TRIGGER privilege as of MySQL
       5.1. In MySQL 5.0, there is no TRIGGER privilege and SUPER is
       required instead. If you downgrade from MySQL 5.1 to 5.0, you
       will need to give the SUPER privilege to those accounts that
       had the TRIGGER privilege in 5.1.

     * Triggers were added in MySQL 5.0, so if you downgrade from 5.0
       to 4.1, you cannot use triggers at all.

     * The mysql.proc.comment column definition changed between MySQL
       5.1 and 5.5. After a downgrade from 5.5 to 5.1, this table is
       seen as corrupt and in need of repair. To workaround this
       problem, execute mysql_upgrade from the version of MySQL to
       which you downgraded.

2.4.2.1. Downgrading to MySQL 5.0

   When downgrading to MySQL 5.0 from MySQL 5.1, you should keep in
   mind the following issues relating to features found in MySQL 5.1,
   but not in MySQL 5.0:

     * Partitioning.  MySQL 5.0 does not support user-defined
       partitioning. If a table was created as a partitioned table in
       5.1 (or if an table created in a previous version of MySQL was
       altered to include partitions after an upgrade to 5.1), the
       table is accessible after downgrade only if you do one of the
       following:

          + Export the table using mysqldump and then drop it in
            MySQL 5.1; import the table again following the downgrade
            to MySQL 5.0.

          + Prior to the downgrade, remove the table's partitioning
            using ALTER TABLE table_name REMOVE PARTITIONING.

     * Event Scheduler.  MySQL 5.0 does not support scheduled events.
       If your databases contain scheduled event definitions, you
       should prevent them from being dumped when you use mysqldump
       by using the --skip-events option. (See Section 4.5.4,
       "mysqldump --- A Database Backup Program.")

     * Stored routines.  MySQL 5.1.21 added a number of new columns
       to the mysql.proc table in which stored routine definitions
       are stored. If you are downgrading from MySQL 5.1.21 or later
       to MySQL 5.0, you cannot import the MySQL 5.1 routine
       definitions into MySQL 5.0.46 or earlier using the dump of
       mysql.proc created by mysqldump (such as when using the
       --all-databases option). Instead, you should run mysqldump
       --routines prior to performing the downgrade and run the
       stored routines DDL statements following the downgrade.
       See Bug#11986: http://bugs.mysql.com/bug.php?id=11986,
       Bug#30029: http://bugs.mysql.com/bug.php?id=30029, and
       Bug#30660: http://bugs.mysql.com/bug.php?id=30660, for more
       information.

     * Triggers.  Trigger creation requires the TRIGGER privilege as
       of MySQL 5.1. In MySQL 5.0, there is no TRIGGER privilege and
       SUPER is required instead. If you downgrade from MySQL 5.1 to
       5.0, you will need to give the SUPER privilege to those
       accounts that had the TRIGGER privilege in 5.1.

2.4.3. Checking Whether Tables or Indexes Must Be Rebuilt

   A binary upgrade or downgrade is one that installs one version of
   MySQL "in place" over an existing version, without dumping and
   reloading tables:

    1. Stop the server for the existing version if it is running.

    2. Install a different version of MySQL. This is an upgrade if
       the new version is higher than the original version, a
       downgrade if the version is lower.

    3. Start the server for the new version.

   In many cases, the tables from the previous version of MySQL can
   be used without problem by the new version. However, sometimes
   changes occur that require tables or table indexes to be rebuilt,
   as described in this section. If you have tables that are affected
   by any of the issues described here, rebuild the tables or indexes
   as necessary using the instructions given in Section 2.4.4,
   "Rebuilding or Repairing Tables or Indexes."

   Table Incompatibilities

   After a binary upgrade to MySQL 5.1 from a MySQL 5.0 installation
   that contains ARCHIVE tables, accessing those tables causes the
   server to crash, even if you have run mysql_upgrade or CHECK TABLE
   ... FOR UPGRADE. To work around this problem, use mysqldump to
   dump all ARCHIVE tables before upgrading, and reload them into
   MySQL 5.1 after upgrading. The same problem occurs for binary
   downgrades from MySQL 5.1 to 5.0.

   Index Incompatibilities

   If you perform a binary upgrade without dumping and reloading
   tables, you cannot upgrade directly from MySQL 4.1 to 5.1 or
   higher. This occurs due to an incompatible change in the MyISAM
   table index format in MySQL 5.0. Upgrade from MySQL 4.1 to 5.0 and
   repair all MyISAM tables. Then upgrade from MySQL 5.0 to 5.1 and
   check and repair your tables.

   Modifications to the handling of character sets or collations
   might change the character sort order, which causes the ordering
   of entries in any index that uses an affected character set or
   collation to be incorrect. Such changes result in several possible
   problems:

     * Comparison results that differ from previous results

     * Inability to find some index values due to misordered index
       entries

     * Misordered ORDER BY results

     * Tables that CHECK TABLE reports as being in need of repair

   The solution to these problems is to rebuild any indexes that use
   an affected character set or collation, either by dropping and
   re-creating the indexes, or by dumping and reloading the entire
   table. For information about rebuilding indexes, see Section
   2.4.4, "Rebuilding or Repairing Tables or Indexes."

   To check whether a table has indexes that must be rebuilt, consult
   the following list. It indicates which versions of MySQL
   introduced character set or collation changes that require indexes
   to be rebuilt. Each entry indicates the version in which the
   change occurred and the character sets or collations that the
   change affects. If the change is associated with a particular bug
   report, the bug number is given.

   The list applies both for binary upgrades and downgrades. For
   example, Bug#27877: http://bugs.mysql.com/bug.php?id=27877 was
   fixed in MySQL 5.1.24 and 5.4.0, so it applies to upgrades from
   versions older than 5.1.24 to 5.1.24 or newer, and to downgrades
   from 5.1.24 or newer to versions older than 5.1.24.

   In many cases, you can use CHECK TABLE ... FOR UPGRADE to identify
   tables for which index rebuilding is required. (It will report:
   Table upgrade required. Please do "REPAIR TABLE `tbl_name`" or
   dump/reload to fix it!) In these cases, you can also use
   mysqlcheck --check-upgrade or mysql_upgrade, which execute CHECK
   TABLE. However, the use of CHECK TABLE applies only after
   upgrades, not downgrades. Also, CHECK TABLE is not applicable to
   all storage engines. For details about which storage engines CHECK
   TABLE supports, see Section 12.4.2.3, "CHECK TABLE Syntax."

   Changes that cause index rebuilding to be necessary:

     * MySQL 5.0.48, 5.1.21
       (Bug#29461: http://bugs.mysql.com/bug.php?id=29461)
       Affects indexes for columns that use any of these character
       sets: eucjpms, euc_kr, gb2312, latin7, macce, ujis
       Affected tables can be detected by CHECK TABLE ... FOR UPGRADE
       as of MySQL 5.1.29, 5.4.0 (see
       Bug#39585: http://bugs.mysql.com/bug.php?id=39585).

     * MySQL 5.0.48, 5.1.23
       (Bug#27562: http://bugs.mysql.com/bug.php?id=27562)
       Affects indexes that use the ascii_general_ci collation for
       columns that contain any of these characters: '`' GRAVE
       ACCENT, '[' LEFT SQUARE BRACKET, '\' REVERSE SOLIDUS, ']'
       RIGHT SQUARE BRACKET, '~' TILDE
       Affected tables can be detected by CHECK TABLE ... FOR UPGRADE
       as of MySQL 5.1.29, 5.4.0 (see
       Bug#39585: http://bugs.mysql.com/bug.php?id=39585).

     * MySQL 5.1.24, 5.4.0
       (Bug#27877: http://bugs.mysql.com/bug.php?id=27877)
       Affects indexes that use the utf8_general_ci or
       ucs2_general_ci collation for columns that contain 'ß' LATIN
       SMALL LETTER SHARP S (German).
       Affected tables can be detected by CHECK TABLE ... FOR UPGRADE
       as of MySQL 5.1.30, 5.4.0 (see
       Bug#40053: http://bugs.mysql.com/bug.php?id=40053).

2.4.4. Rebuilding or Repairing Tables or Indexes

   This section describes how to rebuild a table. This can be
   necessitated by changes to MySQL such as how data types are
   handled or changes to character set handling. For example, an
   error in a collation might have been corrected, necessitating a
   table rebuild to update the indexes for character columns that use
   the collation. (For examples, see Section 2.4.3, "Checking Whether
   Tables or Indexes Must Be Rebuilt.") It might also be that a table
   repair or upgrade should be done as indicated by a table check
   operation such as that performed by CHECK TABLE, mysqlcheck, or
   mysql_upgrade.

   Methods for rebuilding a table include dumping and reloading it,
   or using ALTER TABLE or REPAIR TABLE.

Note

   If you are rebuilding tables because a different version of MySQL
   will not handle them after a binary (in-place) upgrade or
   downgrade, you must use the dump-and-reload method. Dump the
   tables before upgrading or downgrading using your original version
   of MySQL. Then reload the tables after upgrading or downgrading.

   If you use the dump-and-reload method of rebuilding tables only
   for the purpose of rebuilding indexes, you can perform the dump
   either before or after upgrading or downgrading. Reloading still
   must be done afterward.

   To rebuild a table by dumping and reloading it, use mysqldump to
   create a dump file and mysql to reload the file:
shell> mysqldump db_name t1 > dump.sql
shell> mysql db_name < dump.sql

   To rebuild all the tables in a single database, specify the
   database name without any following table name:
shell> mysqldump db_name > dump.sql
shell> mysql db_name < dump.sql

   To rebuild all tables in all databases, use the --all-databases
   option:
shell> mysqldump --all-databases > dump.sql
shell> mysql < dump.sql

   To rebuild a table with ALTER TABLE, use a "null" alteration; that
   is, an ALTER TABLE statement that "changes" the table to use the
   storage engine that it already has. For example, if t1 is a MyISAM
   table, use this statement:
mysql> ALTER TABLE t1 ENGINE = MyISAM;

   If you are not sure which storage engine to specify in the ALTER
   TABLE statement, use SHOW CREATE TABLE to display the table
   definition.

   If you must rebuild a table because a table checking operation
   indicates that the table is corrupt or needs an upgrade, you can
   use REPAIR TABLE if that statement supports the table's storage
   engine. For example, to repair a MyISAM table, use this statement:
mysql> REPAIR TABLE t1;

   For storage engines such as InnoDB that REPAIR TABLE does not
   support, use mysqldump to create a dump file and mysql to reload
   the file, as described earlier.

   For specifics about which storage engines REPAIR TABLE supports,
   see Section 12.4.2.6, "REPAIR TABLE Syntax."

   mysqlcheck --repair provides command-line access to the REPAIR
   TABLE statement. This can be a more convenient means of repairing
   tables because you can use the --databases or --all-databases
   option to repair all tables in specific databases or all
   databases, respectively:
shell> mysqlcheck --repair --databases db_name ...
shell> mysqlcheck --repair --all-databases

2.4.5. Copying MySQL Databases to Another Machine

   You can copy the .frm, .MYI, and .MYD files for MyISAM tables
   between different architectures that support the same
   floating-point format. (MySQL takes care of any byte-swapping
   issues.) See Section 13.5, "The MyISAM Storage Engine."

   In cases where you need to transfer databases between different
   architectures, you can use mysqldump to create a file containing
   SQL statements. You can then transfer the file to the other
   machine and feed it as input to the mysql client.

   Use mysqldump --help to see what options are available.

   The easiest (although not the fastest) way to move a database
   between two machines is to run the following commands on the
   machine on which the database is located:
shell> mysqladmin -h 'other_hostname' create db_name
shell> mysqldump db_name | mysql -h 'other_hostname' db_name

   If you want to copy a database from a remote machine over a slow
   network, you can use these commands:
shell> mysqladmin create db_name
shell> mysqldump -h 'other_hostname' --compress db_name | mysql db_na
me

   You can also store the dump in a file, transfer the file to the
   target machine, and then load the file into the database there.
   For example, you can dump a database to a compressed file on the
   source machine like this:
shell> mysqldump --quick db_name | gzip > db_name.gz

   Transfer the file containing the database contents to the target
   machine and run these commands there:
shell> mysqladmin create db_name
shell> gunzip < db_name.gz | mysql db_name

   You can also use mysqldump and mysqlimport to transfer the
   database. For large tables, this is much faster than simply using
   mysqldump. In the following commands, DUMPDIR represents the full
   path name of the directory you use to store the output from
   mysqldump.

   First, create the directory for the output files and dump the
   database:
shell> mkdir DUMPDIR
shell> mysqldump --tab=DUMPDIR db_name

   Then transfer the files in the DUMPDIR directory to some
   corresponding directory on the target machine and load the files
   into MySQL there:
shell> mysqladmin create db_name           # create database
shell> cat DUMPDIR/*.sql | mysql db_name   # create tables in databas
e
shell> mysqlimport db_name DUMPDIR/*.txt   # load data into tables

   Do not forget to copy the mysql database because that is where the
   grant tables are stored. You might have to run commands as the
   MySQL root user on the new machine until you have the mysql
   database in place.

   After you import the mysql database on the new machine, execute
   mysqladmin flush-privileges so that the server reloads the grant
   table information.

2.5. Installing MySQL on Windows

   This section describes the process for installing MySQL on
   Windows.

   To run MySQL on Windows, you need the following:

     * A Windows operating system such as Windows 2000, Windows XP,
       Windows Vista, Windows Server 2003, or Windows Server 2008.
       Both 32-bit and 64-bit versions are supported.
       In addition to running MySQL as a standard application, you
       can also run the MySQL server as a Windows service. By using a
       service you can monitor and control the operation of the
       server through the standard Windows service management tools.
       For more information, see Section 2.5.5.6, "Starting MySQL as
       a Windows Service."
       Generally, you should install MySQL on Windows using an
       account that has administrator rights. Otherwise, you may
       encounter problems with certain operations such as editing the
       PATH environment variable or accessing the Service Control
       Manager. Once installed, MySQL does not need to be executed
       using a user with Administrator privileges.

     * TCP/IP protocol support.

     * Enough space on the hard drive to unpack, install, and create
       the databases in accordance with your requirements (generally
       a minimum of 200 megabytes is recommended.)

   For a list of limitations within the Windows version of MySQL, see
   Section D.7.3, "Windows Platform Limitations."

   In addition to the MySQL Server package, you may need or want
   additional components to use MySQL with your application or
   development environment. These include, but are not limited to:

     * If you plan to connect to the MySQL server via ODBC, you need
       a Connector/ODBC driver. For more information, including
       installation and configuration instructions, see Section 21.1,
       "MySQL Connector/ODBC."

     * If you plan to use MySQL server with .NET applications, you
       need the Connector/NET driver. For more information, including
       installation and configuration instructions, see Section 21.2,
       "MySQL Connector/NET."

   MySQL distributions for Windows can be downloaded from
   http://dev.mysql.com/downloads/. See Section 2.1.3, "How to Get
   MySQL."

   MySQL for Windows is available in several distribution formats,
   detailed below. Generally speaking, you should use a binary
   distribution that includes an installer. It is simpler to use than
   the others, and you need no additional tools to get MySQL up and
   running. The installer for the Windows version of MySQL, combined
   with a GUI Config Wizard, automatically installs MySQL, creates an
   option file, starts the server, and secures the default user
   accounts.

     * Binary installer distribution. The installable distribution
       comes packaged as a Microsoft Windows Installer (MSI) package
       that you can install manually or automatically on your
       systems. Two formats are available, an essentials package that
       contains all the files you need to install and configure
       MySQL, but no additional components, and a complete package
       that includes MySQL, configuration tools, benchmarks and other
       components. For more information on the specific differences,
       see Section 2.5.2, "Choosing An Installation Package"
       For instructions on installing MySQL using one of the MSI
       installation packages, see Section 2.5.3, "Installing MySQL
       with the MSI Package."

     * Standard binary distribution format packaged as a Zip file
       containing all of the necessary files that you unpack into
       your chosen location. This package contains all of the files
       in the full Windows MSI Installer package, but does not
       including an installation program.
       For instructions on installing MySQL using the Zip file, see
       Section 2.5.5, "Installing MySQL from a noinstall Zip
       Archive."

     * The source distribution contains all the code and support
       files for building the executables using the Visual Studio
       compiler system.
       For instructions on building MySQL from source on Windows, see
       Section 2.5.10, "Installing MySQL from Source on Windows."

   MySQL on Windows considerations:

     * Large Table Support
       If you need tables with a size larger than 4GB, install MySQL
       on an NTFS or newer file system. Don't forget to use MAX_ROWS
       and AVG_ROW_LENGTH when you create tables. See Section
       12.1.17, "CREATE TABLE Syntax."

     * MySQL and Virus Checking Software
       Using virus scanning software such as Norton/Symantec
       Anti-Virus on directories containing MySQL data and temporary
       tables can cause issues, both in terms of the performance of
       MySQL and the virus-scanning software mis-identifying the
       contents of the files as containing spam. This is because of
       the fingerprinting mechanism used by the virus scanning
       software, and the way in which MySQL rapidly updates different
       files, which may be identified as a potential security risk.
       After installing MySQL Server, it is recommended that you
       disable virus scanning on the main directory (datadir) being
       used to store your MySQL table data. There is usually a system
       built into the virus scanning software to allow certain
       directories to be specifically ignored during virus scanning.
       In addition, by default, MySQL creates temporary files in the
       standard Windows temporary directory. To prevent the temporary
       files also being scanned, you should configure a separate
       temporary directory for MySQL temporary files and add this to
       the virus scanning exclusion list. To do this, add a
       configuration option for the tmpdir parameter to your my.ini
       configuration file. For more information, see Section 2.5.5.2,
       "Creating an Option File."

2.5.1. Windows Installation Layout

   For MySQL 5.1 on Windows, the default installation directory is
   C:\Program Files\MySQL\MySQL Server 5.1. Some Windows users prefer
   to install in C:\mysql, the directory that formerly was used as
   the default. However, the layout of the subdirectories remains the
   same.

   For MySQL 5.1.23 and earlier, all of the files are located within
   this parent directory, using the following structure:

   Table 2.2. Installation Layout for Windows using MySQL 5.1.23 and
   earlier
   Directory         Contents of Directory
   bin       Client programs and the mysqld server
   data      Log files, databases
   Docs      Manual in CHM format
   examples  Example programs and scripts
   include   Include (header) files
   lib       Libraries
   scripts   Utility scripts
   share     Error message files

   For MySQL 5.1.24 and later, the default location of data directory
   was changed. The remainder of the directory structure remains the
   same:

   Table 2.3. Installation Layout for Windows using MySQL 5.1.24 and
   later
   Directory Contents of Directory
   bin Client programs and the mysqld server
   C:\Documents and Settings\All Users\Application Data\MySQL Log
   files, databases
   Docs Manual in CHM format
   examples Example programs and scripts
   include Include (header) files
   lib Libraries
   scripts Utility scripts
   share Error message files

2.5.2. Choosing An Installation Package

   For MySQL 5.1, there are three installation packages to choose
   from when installing MySQL on Windows:
     Packaging
   Feature Essentials Complete Zip (No-install)
   Installer Yes Yes No
   Directory-only
   MySQL Server Instance Config Wizard Yes Yes No
   Test Suite No Yes Yes
   MySQL Server Yes Yes Yes
   MySQL Client Programs Yes Yes Yes
   C Headers/Libraries Yes Yes Yes
   Embedded Server No Optional Yes
   Scripts and Examples No Optional Yes

   In the above table:

     * Yes indiciates that the component is installed by default.

     * No indicates that the component is not installed or included.

     * Optional indicates that the component is included with the
       package, but not installed unless explicitly requested using
       the Custom installation mode.

   The workflow for installing using the MSI installer is shown
   below:

   Figure 2.1. Installation Workflow for Windows using MSI
   Installation Workflow for Windows using MSI

   The workflow for installing using the MSI installer is shown
   below:

   Figure 2.2. Installation Workflow for Windows using Zip
   Installation Workflow for Windows using Zip

Note

   For the Essentials and Complete packages in the MSI installer, you
   can select individual components to be installed by using the
   Custom mode, including disable the components confiurated for
   installation by default.

   Full details on the components are suggested uses are provided
   below for reference:

     * Windows Essentials --- this package has a file name similar to
       mysql-essential-5.1.46-win32.msi and is supplied as a
       Microsoft Installer (MSI) package. The package includes the
       minimum set of files needed to install MySQL on Windows,
       including the MySQL Server Instance Config Wizard. This
       package does not include optional components such as the
       embedded server, developer headers and libraries or benchmark
       suite.
       To install using this package, see Section 2.5.3, "Installing
       MySQL with the MSI Package."

     * Windows MSI Installer (Complete) --- this package has a file
       name similar to mysql-5.1.46-win32.zip and contains all files
       needed for a complete Windows installation, including the
       MySQL Server Instance Config Wizard. This package includes
       optional components such as the embedded server and benchmark
       suite.
       To install using this package, see Section 2.5.3, "Installing
       MySQL with the MSI Package."

     * Without installer --- this package has a file name similar to
       mysql-noinstall-5.1.46-win32.zip and contains all the files
       found in the Complete install package, with the exception of
       the MySQL Server Instance Config Wizard. This package does not
       include an automated installer, and must be manually installed
       and configured.

   The Essentials package is recommended for most users. Both the
   Essentials and Complete distributions are available as an .msi
   file for use with the Windows Installer. The Noinstall
   distribution is packaged as Zip archives. To use Zip archives, you
   must have a tool that can unpack .zip files.

   When using the MSI installers you can automate the installation
   process. For more information, see Section 2.5.3.2, "Installing
   MySQL Automatically using MSI." To automate the creation of a
   MySQL instance, see Section 2.5.4.13, "Creating an Instance from
   the Command Line."

   Your choice of install package affects the installation process
   you must follow. If you choose to install either the Essentials or
   Complete install packages, see Section 2.5.3, "Installing MySQL
   with the MSI Package." If you choose to install MySQL from the
   Noinstall archive, see Section 2.5.5, "Installing MySQL from a
   noinstall Zip Archive."

2.5.3. Installing MySQL with the MSI Package

   The MSI package are designed to install and configure MySQL in
   such a way that you can immediately get started using MySQL.

   The MySQL Installation Wizard and MySQL Config Wizard are
   available in the Essentials and Complete install packages. They
   are recommended for most standard MySQL installations. Exceptions
   include users who need to install multiple instances of MySQL on a
   single server host and advanced users who want complete control of
   server configuration.

     * For information on installing using the GUI MSI installer
       process, see Section 2.5.3, "Installing MySQL with the MSI
       Package."

     * For information on installing using the command line using the
       MSI package, see Section 2.5.3.2, "Installing MySQL
       Automatically using MSI."

     * If you have previously installed MySQL using the MSI package
       and want to remove MySQL, see Section 2.5.3.3, "Removing MySQL
       Installed from the MSI Package."

   The workflow sequence for using the installer is shown in the
   figure below:

   Figure 2.3. Installation Workflow for Windows using MSI Installer
   Installation Workflow for Windows using MSI Installer

Note

   Microsoft Windows XP and later include a firewall which
   specifically blocks ports. If you plan on using MySQL through a
   network port then you should open and create an exception for this
   port before performing the installation. To check and if necessary
   add an exception to the firewall settings:

    1. First ensure that you are logged in as an Administrator or a
       user with Administrator privileges.

    2. Go to the Control Panel, and double click the Windows Firewall
       icon.

    3. Choose the Allow a program through Windows Firewall option and
       click the Add port button.

    4. Enter MySQL into the Name text box and 3306 (or the port of
       your choice) into the Port number text box.

    5. Also ensure that the TCP protocol radio button is selected.

    6. If you wish, you can also limit access to the MySQL server by
       choosing the Change scope button.

    7. Confirm your choices by clicking the OK button.

   Additionally, when running the MySQL Installation Wizard on
   Windows Vista, ensure that you are logged in as a user with
   administrative rights.

Note

   When using Windows Vista, you may want to disable User Account
   Control (UAC) before performing the installation. If you do not do
   so, then MySQL may be identified as a security risk, which will
   mean that you need to enable MySQL. You can disable the security
   checking by following these instructions:

    1. Open Control Panel.

    2. Under the User Accounts and Family Safety, select Add or
       remove user accounts.

    3. Click on the Got to the main User Accounts page link.

    4. Click on Turn User Account Control on or off. You may be
       prompted to provide permission to change this setting. Click
       Continue.

    5. Deselect or unceck the checkbox next to Use User Account
       Control (UAC) to help protect your computer. Click OK to save
       the setting.

   You will need to restart to complete the process. Click Restart
   Now to reboot the machine and apply the changes. You can then
   follow the instructions below for installing Windows.

2.5.3.1. Using the MySQL Installation Wizard

   MySQL Installation Wizard is an installer for the MySQL server
   that uses the latest installer technologies for Microsoft Windows.
   The MySQL Installation Wizard, in combination with the MySQL
   Config Wizard, allows a user to install and configure a MySQL
   server that is ready for use immediately after installation.

   The MySQL Installation Wizard uses the standard Microsoft
   Installer Engine (MSI) system is the standard installer for all
   MySQL server distributions, version 4.1.5 and higher. Users of
   previous versions of MySQL need to shut down and remove their
   existing MySQL installations manually before installing MySQL with
   the MySQL Installation Wizard. See Section 2.5.3.1.6, "Upgrading
   MySQL with the Installation Wizard," for more information on
   upgrading from a previous version.

   If you are upgrading an installation from MySQL 5.1.31 or earlier
   to MySQL 5.1.32 or later, read the notes provided in Section
   2.5.3.1.6, "Upgrading MySQL with the Installation Wizard."

   The Microsoft Windows Installer Engine was updated with the
   release of Windows XP; those using a previous version of Windows
   can reference this Microsoft Knowledge Base article
   (http://support.microsoft.com/default.aspx?scid=kb;EN-US;292539)
   for information on upgrading to the latest version of the Windows
   Installer Engine.

   In addition, Microsoft has introduced the WiX (Windows Installer
   XML) toolkit. This is the first highly acknowledged Open Source
   project from Microsoft. We have switched to WiX because it is an
   Open Source project and it allows us to handle the complete
   Windows installation process in a flexible manner using scripts.

   Improving the MySQL Installation Wizard depends on the support and
   feedback of users like you. If you find that the MySQL
   Installation Wizard is lacking some feature important to you, or
   if you discover a bug, please report it in our bugs database using
   the instructions given in Section 1.7, "How to Report Bugs or
   Problems."

2.5.3.1.1. Downloading and Starting the MySQL Installation Wizard

   The MySQL installation packages can be downloaded from
   http://dev.mysql.com/downloads/. If the package you download is
   contained within a Zip archive, you need to extract the archive
   first.

   The process for starting the wizard depends on the contents of the
   installation package you download. If there is a setup.exe file
   present, double-click it to start the installation process. If
   there is an .msi file present, double-click it to start the
   installation process.

2.5.3.1.2. Choosing an Install Type

   There are three installation types available: Typical, Complete,
   and Custom.

   The Typical installation type installs the MySQL server, the mysql
   command-line client, and the command-line utilities. The
   command-line clients and utilities include mysqldump, myisamchk,
   and several other tools to help you manage the MySQL server.

   The Complete installation type installs all components included in
   the installation package. The full installation package includes
   components such as the embedded server library, the benchmark
   suite, support scripts, and documentation.

   The Custom installation type gives you complete control over which
   packages you wish to install and the installation path that is
   used. See Section 2.5.3.1.3, "The Custom Install Dialog," for more
   information on performing a custom install.

   If you choose the Typical or Complete installation types and click
   the Next button, you advance to the confirmation screen to verify
   your choices and begin the installation. If you choose the Custom
   installation type and click the Next button, you advance to the
   custom installation dialog, described in Section 2.5.3.1.3, "The
   Custom Install Dialog."

2.5.3.1.3. The Custom Install Dialog

   If you wish to change the installation path or the specific
   components that are installed by the MySQL Installation Wizard,
   choose the Custom installation type.

   A tree view on the left side of the custom install dialog lists
   all available components. Components that are not installed have a
   red X icon; components that are installed have a gray icon. To
   change whether a component is installed, click on that component's
   icon and choose a new option from the drop-down list that appears.

   You can change the default installation path by clicking the
   Change... button to the right of the displayed installation path.

   After choosing your installation components and installation path,
   click the Next button to advance to the confirmation dialog.

2.5.3.1.4. The Confirmation Dialog

   Once you choose an installation type and optionally choose your
   installation components, you advance to the confirmation dialog.
   Your installation type and installation path are displayed for you
   to review.

   To install MySQL if you are satisfied with your settings, click
   the Install button. To change your settings, click the Back
   button. To exit the MySQL Installation Wizard without installing
   MySQL, click the Cancel button.

   After installation is complete, you have the option of registering
   with the MySQL web site. Registration gives you access to post in
   the MySQL forums at forums.mysql.com (http://forums.mysql.com),
   along with the ability to report bugs at bugs.mysql.com
   (http://bugs.mysql.com) and to subscribe to our newsletter. The
   final screen of the installer provides a summary of the
   installation and gives you the option to launch the MySQL Config
   Wizard, which you can use to create a configuration file, install
   the MySQL service, and configure security settings.

2.5.3.1.5. Changes Made by MySQL Installation Wizard

   Once you click the Install button, the MySQL Installation Wizard
   begins the installation process and makes certain changes to your
   system which are described in the sections that follow.

   Changes to the Registry

   The MySQL Installation Wizard creates one Windows registry key in
   a typical install situation, located in
   HKEY_LOCAL_MACHINE\SOFTWARE\MySQL AB.

   The MySQL Installation Wizard creates a key named after the major
   version of the server that is being installed, such as MySQL
   Server 5.1. It contains two string values, Location and Version.
   The Location string contains the path to the installation
   directory. In a default installation it contains C:\Program
   Files\MySQL\MySQL Server 5.1\. The Version string contains the
   release number. For example, for an installation of MySQL Server
   5.1.46, the key contains a value of 5.1.46.

   These registry keys are used to help external tools identify the
   installed location of the MySQL server, preventing a complete scan
   of the hard-disk to determine the installation path of the MySQL
   server. The registry keys are not required to run the server, and
   if you install MySQL using the noinstall Zip archive, the registry
   keys are not created.

   Changes to the Start Menu

   The MySQL Installation Wizard creates a new entry in the Windows
   Start menu under a common MySQL menu heading named after the major
   version of MySQL that you have installed. For example, if you
   install MySQL 5.1, the MySQL Installation Wizard creates a MySQL
   Server 5.1 section in the Start menu.

   The following entries are created within the new Start menu
   section:

     * MySQL Command Line Client: This is a shortcut to the mysql
       command-line client and is configured to connect as the root
       user. The shortcut prompts for a root user password when you
       connect.

     * MySQL Server Instance Config Wizard: This is a shortcut to the
       MySQL Config Wizard. Use this shortcut to configure a newly
       installed server, or to reconfigure an existing server.

     * MySQL Documentation: This is a link to the MySQL server
       documentation that is stored locally in the MySQL server
       installation directory. This option is not available when the
       MySQL server is installed using the Essentials installation
       package.

   Changes to the File System

   The MySQL Installation Wizard by default installs the MySQL 5.1
   server to C:\Program Files\MySQL\MySQL Server 5.1, where Program
   Files is the default location for applications in your system, and
   5.1 is the major version of your MySQL server. This is the
   recommended location for the MySQL server, replacing the former
   default location C:\mysql.

   By default, all MySQL applications are stored in a common
   directory at C:\Program Files\MySQL, where Program Files is the
   default location for applications in your Windows installation. A
   typical MySQL installation on a developer machine might look like
   this:
C:\Program Files\MySQL\MySQL Server 5.1
C:\Program Files\MySQL\MySQL Workbench 5.1 OSS

   This approach makes it easier to manage and maintain all MySQL
   applications installed on a particular system.

   In MySQL 5.1.23 and earlier, the default location for the data
   files used by MySQL is located within the corresponding MySQL
   Server installation directory. For MySQL 5.1.24 and later, the
   default location of the data directory is the AppData directory
   configured for the user that installed the MySQL application.

2.5.3.1.6. Upgrading MySQL with the Installation Wizard

   The MySQL Installation Wizard can perform server upgrades
   automatically using the upgrade capabilities of MSI. That means
   you do not need to remove a previous installation manually before
   installing a new release. The installer automatically shuts down
   and removes the previous MySQL service before installing the new
   version.

   Automatic upgrades are available only when upgrading between
   installations that have the same major and minor version numbers.
   For example, you can upgrade automatically from MySQL 5.1.34 to
   MySQL 5.1.37, but not from MySQL 5.0 to MySQL 5.1.

   In MySQL 5.1.32 and later, the EXE version of the MSI installer
   packages were removed. When upgrading an existing MySQL
   installation from the old EXE based installer to the MSI based
   installer, please keep the following notes in mind:

     * The MSI installer will not identify an existing installation
       that was installed using the old EXE installer. This means
       that the installer will not stop the existing server, or
       detect that the existing password is required before
       installing the new version. To work around this:

         1. Stop the current server manually using net stop or
            mysqladmin shutdown.

         2. Remove the existing installation manually by using the
            Add/Remove Programs control panel. This will keep the
            existing configuration and data files, as these are not
            removed automatically.

         3. Install the new version of MySQL using the MSI installer.
            When running the installation, skip updating the security
            by deselecting the checkbox on the security screen.

         4. Complete the installation, and then start the server
            again. You should be able to login with your existing
            user and password credentials.

     * You can only upgrade the version and release using the MSI
       installer. For example, you can upgrade an open source
       installation with an open source installer. You cannot upgrade
       an open source installation using the enterprise installer.

   See Section 2.5.7, "Upgrading MySQL on Windows."

2.5.3.2. Installing MySQL Automatically using MSI

   The Microsoft Installer (MSI) supports a both a quiet and a
   passive mode that can be used to install MySQL automatically
   without requireing intervention. You can use this either in
   scripts to automatically install MySQL or through a terminal
   connection such as Telnet where you do not have access to the
   standard Windows user interface. The MSI packages can also be used
   in combination with Microsoft's Group Policy system (part of
   Windows Server 2003 and Windows Server 2008) to install MySQL
   across multiple machines.

   To install MySQL from one of the MSI packages automatically from
   the command line (or within a script), you need to use the
   msiexec.exe tool. For example, to perform a quiet installation
   (which shows no dialog boxes or progress):
shell> msiexec /i /quiet mysql-5.1.39.msi

   The /i indicates that you want to perform an installation. The
   /quiet option indicates that you want no interactive elements.

   To provide a dialog box showing the progress during installation,
   and the dialog boxes providing information on the installation and
   registration of MySQL, use /passive mode instead of /quiet:
shell> msiexec /i /passive mysql-5.1.39.msi

   Regardless of the mode of the installation, installing the package
   in this manner performs a 'Typical' installation, and installs the
   default components into the standard location.

   You can also use this method to uninstall MySQL by using the
   /uninstall or /x options:
shell> msiexec /x /quiet mysql-5.1.39.msi

   To install MySQL and configure a MySQL instance from the command
   line, see Section 2.5.4.13, "Creating an Instance from the Command
   Line."

   For information on using MSI packages to install software
   automatically using Group Policy, see How to use Group Policy to
   remotely install software in Windows Server 2003
   (http://support.microsoft.com/kb/816102).

2.5.3.3. Removing MySQL Installed from the MSI Package

   To uninstall a MySQL where you have used the MSI packages, you
   must use the Add/Remove Programs tool within Control Panel. To do
   this:

    1. Right click on the start menu and choose Control Panel.

    2. If the Control Panel is set to category mode (you will see
       Pick a category at the top of the Control Panel window),
       double click on Add or Remove Programs. If the Control is set
       to classic mode, doubgle click on the Add or Remove Programs
       icon.

    3. Find MySQL in the list of installed software. MySQL Server is
       installed against major version numbers (MySQL 5.0, MySQL 5.1,
       etc.). Select the version that you want to remove and click
       Remove.

    4. You will be prompted to confirm the removal. Click Yes to
       remove MySQL.

   When MySQL is removed using this method, only the installed
   components are removed. Any database information (including the
   tables and data), import or export files, log files, and binary
   logs produced during execution are kept in their configured
   location.

2.5.4. MySQL Server Instance Config Wizard

   The MySQL Server Instance Config Wizard helps automate the process
   of configuring your server. It creates a custom MySQL
   configuration file (my.ini or my.cnf) by asking you a series of
   questions and then applying your responses to a template to
   generate the configuration file that is tuned to your
   installation.

   The complete and essential MSI installation packages include the
   MySQL Server Instance Config Wizard in the MySQL 5.1 server. The
   MySQL Server Instance Config Wizard is only available for Windows.

   The workflow sequence for using the MySQL Server Instance Config
   Wizard is shown in the figure below:

   Figure 2.4. MySQL Server Instance Config Wizard Workflow
   MySQL Server Instance Config Wizard Workflow

2.5.4.1. Starting the MySQL Server Instance Config Wizard

   The MySQL Server Instance Config Wizard is normally started as
   part of the installation process. You should only need to run the
   MySQL Server Instance Config Wizard again when you need to change
   the configuration parameters of your server.

   If you chose not to open a port prior to installing MySQL on
   Windows Vista, you can choose to use the MySQL Server Instance
   Config Wizard after installation. However, you must open a port in
   the Windows Firewall. To do this see the instructions given in
   Section 2.5.3.1.1, "Downloading and Starting the MySQL
   Installation Wizard." Rather than opening a port, you also have
   the option of adding MySQL as a program that bypasses the Windows
   Firewall. One or the other option is sufficient --- you need not
   do both. Additionally, when running the MySQL Server Config Wizard
   on Windows Vista ensure that you are logged in as a user with
   administrative rights.
   MySQL Server Instance Config Wizard

   You can launch the MySQL Config Wizard by clicking the MySQL
   Server Instance Config Wizard entry in the MySQL section of the
   Windows Start menu.

   Alternatively, you can navigate to the bin directory of your MySQL
   installation and launch the MySQLInstanceConfig.exe file directly.

   The MySQL Server Instance Config Wizard places the my.ini file in
   the installation directory for the MySQL server. This helps
   associate configuration files with particular server instances.

   To ensure that the MySQL server knows where to look for the my.ini
   file, an argument similar to this is passed to the MySQL server as
   part of the service installation:
--defaults-file="C:\Program Files\MySQL\MySQL Server 5.1\my.ini"

   Here, C:\Program Files\MySQL\MySQL Server 5.1 is replaced with the
   installation path to the MySQL Server. The --defaults-file option
   instructs the MySQL server to read the specified file for
   configuration options when it starts.

   Apart from making changes to the my.ini file by running the MySQL
   Server Instance Config Wizard again, you can modify it by opening
   it with a text editor and making any necessary changes. You can
   also modify the server configuration with the
   http://www.mysql.com/products/administrator/ utility. For more
   information about server configuration, see Section 5.1.2, "Server
   Command Options."

   MySQL clients and utilities such as the mysql and mysqldump
   command-line clients are not able to locate the my.ini file
   located in the server installation directory. To configure the
   client and utility applications, create a new my.ini file in the
   Windows installation directory (for example, C:\WINDOWS).

   Under Windows Server 2003, Windows Server 2000, Windows XP, and
   Windows Vista MySQL Server Instance Config Wizard will configure
   MySQL to work as a Windows service. To start and stop MySQL you
   use the Services application that is supplied as part of the
   Windows Administrator Tools.

2.5.4.2. Choosing a Maintenance Option

   If the MySQL Server Instance Config Wizard detects an existing
   configuration file, you have the option of either reconfiguring
   your existing server, or removing the server instance by deleting
   the configuration file and stopping and removing the MySQL
   service.

   To reconfigure an existing server, choose the Re-configure
   Instance option and click the Next button. Any existing
   configuration file is not overwritten, but renamed (within the
   same directory) using a timestamp (Windows) or sequential number
   (Linux). To remove the existing server instance, choose the Remove
   Instance option and click the Next button.

   If you choose the Remove Instance option, you advance to a
   confirmation window. Click the Execute button. The MySQL Server
   Config Wizard stops and removes the MySQL service, and then
   deletes the configuration file. The server installation and its
   data folder are not removed.

   If you choose the Re-configure Instance option, you advance to the
   Configuration Type dialog where you can choose the type of
   installation that you wish to configure.

2.5.4.3. Choosing a Configuration Type

   When you start the MySQL Server Instance Config Wizard for a new
   MySQL installation, or choose the Re-configure Instance option for
   an existing installation, you advance to the Configuration Type
   dialog.
   MySQL Server Instance Config Wizard: Configuration Type

   There are two configuration types available: Detailed
   Configuration and Standard Configuration. The Standard
   Configuration option is intended for new users who want to get
   started with MySQL quickly without having to make many decisions
   about server configuration. The Detailed Configuration option is
   intended for advanced users who want more fine-grained control
   over server configuration.

   If you are new to MySQL and need a server configured as a
   single-user developer machine, the Standard Configuration should
   suit your needs. Choosing the Standard Configuration option causes
   the MySQL Config Wizard to set all configuration options
   automatically with the exception of Service Options and Security
   Options.

   The Standard Configuration sets options that may be incompatible
   with systems where there are existing MySQL installations. If you
   have an existing MySQL installation on your system in addition to
   the installation you wish to configure, the Detailed Configuration
   option is recommended.

   To complete the Standard Configuration, please refer to the
   sections on Service Options and Security Options in Section
   2.5.4.10, "The Service Options Dialog," and Section 2.5.4.11, "The
   Security Options Dialog," respectively.

2.5.4.4. The Server Type Dialog

   There are three different server types available to choose from.
   The server type that you choose affects the decisions that the
   MySQL Server Instance Config Wizard makes with regard to memory,
   disk, and processor usage.
   MySQL Server Instance Config Wizard: Server Type

     * Developer Machine: Choose this option for a typical desktop
       workstation where MySQL is intended only for personal use. It
       is assumed that many other desktop applications are running.
       The MySQL server is configured to use minimal system
       resources.

     * Server Machine: Choose this option for a server machine where
       the MySQL server is running alongside other server
       applications such as FTP, email, and Web servers. The MySQL
       server is configured to use a moderate portion of the system
       resources.

     * Dedicated MySQL Server Machine: Choose this option for a
       server machine that is intended to run only the MySQL server.
       It is assumed that no other applications are running. The
       MySQL server is configured to use all available system
       resources.

Note

   By selecting one of the preconfigured configurations, the values
   and settings of various options in your my.cnf or my.ini will be
   altered accordingly. The default values and options as described
   in the reference manual may therefore be different to the options
   and values that were created during the execution of the Config
   Wizard.

2.5.4.5. The Database Usage Dialog

   The Database Usage dialog allows you to indicate the storage
   engines that you expect to use when creating MySQL tables. The
   option you choose determines whether the InnoDB storage engine is
   available and what percentage of the server resources are
   available to InnoDB.
   MySQL Server Instance Config Wizard: Usage Dialog

     * Multifunctional Database: This option enables both the InnoDB
       and MyISAM storage engines and divides resources evenly
       between the two. This option is recommended for users who use
       both storage engines on a regular basis.

     * Transactional Database Only: This option enables both the
       InnoDB and MyISAM storage engines, but dedicates most server
       resources to the InnoDB storage engine. This option is
       recommended for users who use InnoDB almost exclusively and
       make only minimal use of MyISAM.

     * Non-Transactional Database Only: This option disables the
       InnoDB storage engine completely and dedicates all server
       resources to the MyISAM storage engine. This option is
       recommended for users who do not use InnoDB.

   The Config Wizard uses a template to generate the server
   configuration file. The Database Usage dialog sets one of the
   following option strings:
Multifunctional Database:        MIXED
Transactional Database Only:     INNODB
Non-Transactional Database Only: MYISAM

   When these options are processed through the default template
   (my-template.ini) the result is:
Multifunctional Database:
default-storage-engine=InnoDB
_myisam_pct=50

Transactional Database Only:
default-storage-engine=InnoDB
_myisam_pct=5

Non-Transactional Database Only:
default-storage-engine=MyISAM
_myisam_pct=100
skip-innodb

   The _myisam_pct value is used to calculate the percentage of
   resources dedicated to MyISAM. The remaining resources are
   allocated to InnoDB.

2.5.4.6. The InnoDB Tablespace Dialog

   Some users may want to locate the InnoDB tablespace files in a
   different location than the MySQL server data directory. Placing
   the tablespace files in a separate location can be desirable if
   your system has a higher capacity or higher performance storage
   device available, such as a RAID storage system.
   MySQL Server Instance Config Wizard: InnoDB Data Tablespace

   To change the default location for the InnoDB tablespace files,
   choose a new drive from the drop-down list of drive letters and
   choose a new path from the drop-down list of paths. To create a
   custom path, click the ... button.

   If you are modifying the configuration of an existing server, you
   must click the Modify button before you change the path. In this
   situation you must move the existing tablespace files to the new
   location manually before starting the server.

2.5.4.7. The Concurrent Connections Dialog

   To prevent the server from running out of resources, it is
   important to limit the number of concurrent connections to the
   MySQL server that can be established. The Concurrent Connections
   dialog allows you to choose the expected usage of your server, and
   sets the limit for concurrent connections accordingly. It is also
   possible to set the concurrent connection limit manually.
   MySQL Server Instance Config Wizard: Connections

     * Decision Support (DSS)/OLAP: Choose this option if your server
       does not require a large number of concurrent connections. The
       maximum number of connections is set at 100, with an average
       of 20 concurrent connections assumed.

     * Online Transaction Processing (OLTP): Choose this option if
       your server requires a large number of concurrent connections.
       The maximum number of connections is set at 500.

     * Manual Setting: Choose this option to set the maximum number
       of concurrent connections to the server manually. Choose the
       number of concurrent connections from the drop-down box
       provided, or enter the maximum number of connections into the
       drop-down box if the number you desire is not listed.

2.5.4.8. The Networking and Strict Mode Options Dialog

   Use the Networking Options dialog to enable or disable TCP/IP
   networking and to configure the port number that is used to
   connect to the MySQL server.
   MySQL Server Instance Config Wizard: Network Configuration

   TCP/IP networking is enabled by default. To disable TCP/IP
   networking, uncheck the box next to the Enable TCP/IP Networking
   option.

   Port 3306 is used by default. To change the port used to access
   MySQL, choose a new port number from the drop-down box or type a
   new port number directly into the drop-down box. If the port
   number you choose is in use, you are prompted to confirm your
   choice of port number.

   Set the Server SQL Mode to either enable or disable strict mode.
   Enabling strict mode (default) makes MySQL behave more like other
   database management systems. If you run applications that rely on
   MySQL's old "forgiving" behavior, make sure to either adapt those
   applications or to disable strict mode. For more information about
   strict mode, see Section 5.1.8, "Server SQL Modes."

2.5.4.9. The Character Set Dialog

   The MySQL server supports multiple character sets and it is
   possible to set a default server character set that is applied to
   all tables, columns, and databases unless overridden. Use the
   Character Set dialog to change the default character set of the
   MySQL server.
   MySQL Server Instance Config Wizard: Character Set

     * Standard Character Set: Choose this option if you want to use
       latin1 as the default server character set. latin1 is used for
       English and many Western European languages.

     * Best Support For Multilingualism: Choose this option if you
       want to use utf8 as the default server character set. This is
       a Unicode character set that can store characters from many
       different languages.

     * Manual Selected Default Character Set / Collation: Choose this
       option if you want to pick the server's default character set
       manually. Choose the desired character set from the provided
       drop-down list.

2.5.4.10. The Service Options Dialog

   On Windows platforms, the MySQL server can be installed as a
   Windows service. When installed this way, the MySQL server can be
   started automatically during system startup, and even restarted
   automatically by Windows in the event of a service failure.

   The MySQL Server Instance Config Wizard installs the MySQL server
   as a service by default, using the service name MySQL. If you do
   not wish to install the service, uncheck the box next to the
   Install As Windows Service option. You can change the service name
   by picking a new service name from the drop-down box provided or
   by entering a new service name into the drop-down box.

Note

   Service names can include any legal character except forward (/)
   or backward (\) slashes, and must be less than 256 characters
   long.

Warning

   If you are installing multiple versions of MySQL onto the same
   machine, you must choose a different service name for each version
   that you install. If you do not choose a different service for
   each installed version then the service manager information will
   be inconsistent and this will cause problems when you try to
   uninstall a previous version.

   If you have already installed multiple versions using the same
   service name, you must manually edit the contents of the
   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services parameters
   within the Windows registry to update the association of the
   service name with the correct server version.

   Typically, when installing multiple versions you create a service
   name based on the version information. For example, you might
   install MySQL 5.x as mysql5, or specific versions such as MySQL
   5.1.30 as mysql50130.

   To install the MySQL server as a service but not have it started
   automatically at startup, uncheck the box next to the Launch the
   MySQL Server Automatically option.

2.5.4.11. The Security Options Dialog

   The content of the security options portion of the MySQL Server
   Instance Configuration Wizard will depend on whether this is a new
   installation, or modifying an existing installation.

     * Setting the root password for a new installation
       It is strongly recommended that you set a root password for
       your MySQL server, and the MySQL Server Instance Config Wizard
       requires by default that you do so. If you do not wish to set
       a root password, uncheck the box next to the Modify Security
       Settings option.
       MySQL Server Instance Config Wizard: Security

     * To set the root password, enter the desired password into both
       the New root password and Confirm boxes.
       Setting the root password for an existing installation
       If you are modifying the configuration of an existing
       configuration, or you are installing an upgrade and the MySQL
       Server Instance Configuration Wizard has detected an existing
       MySQL system, then you must enter the existing password for
       root before changing the configuration information.
       MySQL Server Instance Config Wizard: Security (Existing
       Installation)
       If you want to change the current root password, enter the
       desired new password into both the New root password and
       Confirm boxes.

   To allow root logins from across the network, check the box next
   to the Enable root access from remote machines option. This
   decreases the security of your root account.

   To create an anonymous user account, check the box next to the
   Create An Anonymous Account option. Creating an anonymous account
   can decrease server security and cause login and permission
   difficulties. For this reason, it is not recommended.

2.5.4.12. The Confirmation Dialog

   The final dialog in the MySQL Server Instance Config Wizard is the
   Confirmation Dialog. To start the configuration process, click the
   Execute button. To return to a previous dialog, click the Back
   button. To exit the MySQL Server Instance Config Wizard without
   configuring the server, click the Cancel button.
   MySQL Server Instance Config Wizard: Confirmation

   After you click the Execute button, the MySQL Server Instance
   Config Wizard performs a series of tasks and displays the progress
   onscreen as the tasks are performed.

   The MySQL Server Instance Config Wizard first determines
   configuration file options based on your choices using a template
   prepared by MySQL developers and engineers. This template is named
   my-template.ini and is located in your server installation
   directory.

   The MySQL Config Wizard then writes these options to the
   corresponding configuration file.

   If you chose to create a service for the MySQL server, the MySQL
   Server Instance Config Wizard creates and starts the service. If
   you are reconfiguring an existing service, the MySQL Server
   Instance Config Wizard restarts the service to apply your
   configuration changes.

   If you chose to set a root password, the MySQL Config Wizard
   connects to the server, sets your new root password, and applies
   any other security settings you may have selected.

   After the MySQL Server Instance Config Wizard has completed its
   tasks, it displays a summary. Click the Finish button to exit the
   MySQL Server Config Wizard.

2.5.4.13. Creating an Instance from the Command Line

   In addition to using the GUI interface to the MySQL Server
   Instance Config Wizard, you can also create instances
   automatically from the command line.

   To use the MySQL Server Instance Config Wizard on the command
   line, you need to use the MySQLInstanceConfig.exe command that is
   installed with MySQL in the bin directory within the installation
   directory. MySQLInstanceConfig.exe takes a number of command-line
   arguments the set the properties that would normally be selected
   through the GUI interface, and then creates a new configuration
   file (my.ini) by combining these selections with a template
   configuration file to produce the working configuration file.

   The main command line options are provided in the table below.
   Some of the options are required, while some options are optional.

   Table 2.4. MySQL Server Instance Config Wizard Command Line
   Options
   Option Description
   Required Parameters
   -nPRODUCTNAME The name of the instance when installed
   -pPATH Path of the base directory for installation. This is
   equivalent to the directory when using the basedir configuration
   parameter
   -vVERSION The version tag to use for this installation
   Action to Perform
   -i Install an instance
   -r Remove an instance
   -s Stop an existing instance
   -q Perform the operation quietly
   -lFILENAME Sae the installation progress in a logfile
   Config File to Use
   -tFILENAME Path to the template config file that will be used to
   generate the installed configuration file
   -cFILENAME Path to a config file to be generated

   The -t and -c options work together to set the configuration
   parameters for a new instance. The -t option specifies the
   template configuration file to use as the basic configuration,
   which are then merged with the configuration parameters generated
   by the MySQL Server Instance Config Wizard into the configuration
   file specified by the -c option.

   A sample template file, my-template.ini is provided in the
   toplevel MySQL installation directory. The file contains elements
   are replaced automatically by the MySQL Server Instance Config
   Wizard during configuration.

   If you specify a configuration file that already exists, the
   existing configuration file will be saved in the file with the
   original, with the date and time added. For example, the mysql.ini
   will be copied to mysql 2009-10-27 1646.ini.bak.

   The parameters that you can specify on the command line are listed
   in the table below.

   Table 2.5. MySQL Server Instance Config Wizard Parameters
   Parameter Description
   ServiceName=$ Specify the name of the service to be created
   AddBinToPath={yes | no} Specifies whether to add the binary
   directory of MySQL to the standard PATH environment variable
   ServerType={DEVELOPMENT | SERVER | DEDICATED} Specify the server
   type. For more information, see Section 2.5.4.4, "The Server Type
   Dialog"
   DatabaseType={MIXED | INNODB | MYISAM} Specify the default
   database type. For more information, see Section 2.5.4.5, "The
   Database Usage Dialog"
   ConnectionUsage={DSS | OLTP} Specify the type of connection
   support, this automates the setting for the number of concurrent
   connections (see the ConnectionCount parameter). For more
   information, see Section 2.5.4.7, "The Concurrent Connections
   Dialog"
   ConnectionCount=# Specify the number of concurrent connections to
   support. For more information, see Section 2.5.4.4, "The Server
   Type Dialog"
   SkipNetworking={yes | no} Specify whether network support should
   be supported. Specifying yes disables network access altogether
   Port=# Specify the network port number to use for network
   connections. For more information, see Section 2.5.4.8, "The
   Networking and Strict Mode Options Dialog"
   StrictMode={yes | no} Specify whether to use the strict SQL mode.
   For more information, see Section 2.5.4.8, "The Networking and
   Strict Mode Options Dialog"
   Charset=$ Specify the default character set. For more information,
   see Section 2.5.4.9, "The Character Set Dialog"
   RootPassword=$ Specify the root password
   RootCurrentPassword=$ Specify the current root password then
   stopping and/or reconfiguring an existing service

Note

   When specifying options on the command line, you can enclose the
   entire command-line option and the value you are specifying using
   double quotes. This enables you to use spaces in the options. For
   example, "-cC:\mysql.ini".

   The following command installs a MySQL Server 5.1 instance from
   the directory C:\Program Files\MySQL\MySQL Server 5.1 using the
   service name MySQL51 and setting the root password to 1234.
shell> MySQLInstanceConfig.exe -i -q "-lC:\mysql_install_log.txt" »
   "-nMySQL Server 5.1" "-pC:\Program Files\MySQL\MySQL Server 5.1" -
v5.1.39 »
   "-tmy-template.ini" "-cC:\mytest.ini" ServerType=DEVELOPMENT Datab
aseType=MIXED »
   ConnectionUsage=DSS Port=3311 ServiceName=MySQL51 RootPassword=123
4

   In the above example, a log file will be generated in
   mysql_install_log.txt containing the information about the
   instance creation process. The log file generated by the above
   example is shown below:
Welcome to the MySQL Server Instance Configuration Wizard 1.0.16.0
Date: 2009-10-27 17:07:21

Installing service ...

Product Name:         MySQL Server 5.1
Version:              5.1.39
Installation Path:    C:\Program Files\MySQL\MySQL Server 5.1\

Creating configuration file C:\mytest.ini using template my-template.
ini.
Options:
DEVELOPMENT
MIXED
DSS
STRICTMODE

Variables:
port: 3311
default-character-set: latin1
basedir: "C:/Program Files/MySQL/MySQL Server 5.1/"
datadir: "C:/Program Files/MySQL/MySQL Server 5.1/Data/"


Creating Windows service entry.
Service name: "MySQL51"
Parameters:   "C:\Program Files\MySQL\MySQL Server 5.1\bin\mysqld" --
defaults-file="C:\mytest.ini" MySQL51.
Windows service MySQL51 installed.

   When using the command-line, the return values in the following
   table indicate an error performing the specified option.

   Table 2.6. Return Value from MySQL Server Instance Config Wizard
   Value                   Description
   2     Configuration template file cannot be found
   3     The Windows service entry cannot be created
   4     Could not connect to the Service Control Manager
   5     The MySQL service cannot be started
   6     The MySQL service cannot be stopped
   7     The security settings cannot be applied
   8     The configuration file cannot be written
   9     The Windows service entry cannot be removed

   You can perform an installation of MySQL automatically using the
   MSI packe. For more information, see Section 2.5.3.2, "Installing
   MySQL Automatically using MSI."

2.5.5. Installing MySQL from a noinstall Zip Archive

   Users who are installing from the noinstall package can use the
   instructions in this section to manually install MySQL. The
   process for installing MySQL from a Zip archive is as follows:

    1. Extract the archive to the desired install directory

    2. Create an option file

    3. Choose a MySQL server type

    4. Start the MySQL server

    5. Secure the default user accounts

   This process is described in the sections that follow.

2.5.5.1. Extracting the Install Archive

   To install MySQL manually, do the following:

    1. If you are upgrading from a previous version please refer to
       Section 2.5.7, "Upgrading MySQL on Windows," before beginning
       the upgrade process.

    2. Make sure that you are logged in as a user with administrator
       privileges.

    3. Choose an installation location. Traditionally, the MySQL
       server is installed in C:\mysql. The MySQL Installation Wizard
       installs MySQL under C:\Program Files\MySQL. If you do not
       install MySQL at C:\mysql, you must specify the path to the
       install directory during startup or in an option file. See
       Section 2.5.5.2, "Creating an Option File."

    4. Extract the install archive to the chosen installation
       location using your preferred Zip archive tool. Some tools may
       extract the archive to a folder within your chosen
       installation location. If this occurs, you can move the
       contents of the subfolder into the chosen installation
       location.

2.5.5.2. Creating an Option File

   If you need to specify startup options when you run the server,
   you can indicate them on the command line or place them in an
   option file. For options that are used every time the server
   starts, you may find it most convenient to use an option file to
   specify your MySQL configuration. This is particularly true under
   the following circumstances:

     * The installation or data directory locations are different
       from the default locations (C:\Program Files\MySQL\MySQL
       Server 5.1 and C:\Program Files\MySQL\MySQL Server 5.1\data).

     * You need to tune the server settings, such as memory, cache,
       or InnoDB configuration information.

   When the MySQL server starts on Windows, it looks for option files
   in several locations, such as the Windows directory, C:\, and the
   MySQL installation directory (for the full list of locations, see
   Section 4.2.3.3, "Using Option Files"). The Windows directory
   typically is named something like C:\WINDOWS. You can determine
   its exact location from the value of the WINDIR environment
   variable using the following command:
C:\> echo %WINDIR%

   MySQL looks for options in each location first in the my.ini file,
   and then in the my.cnf file. However, to avoid confusion, it is
   best if you use only one file. If your PC uses a boot loader where
   C: is not the boot drive, your only option is to use the my.ini
   file. Whichever option file you use, it must be a plain text file.

   You can also make use of the example option files included with
   your MySQL distribution; see Section 4.2.3.3.2, "Preconfigured
   Option Files."

   An option file can be created and modified with any text editor,
   such as Notepad. For example, if MySQL is installed in E:\mysql
   and the data directory is in E:\mydata\data, you can create an
   option file containing a [mysqld] section to specify values for
   the basedir and datadir options:
[mysqld]
# set basedir to your installation path
basedir=E:/mysql
# set datadir to the location of your data directory
datadir=E:/mydata/data

   Note that Windows path names are specified in option files using
   (forward) slashes rather than backslashes. If you do use
   backslashes, double them:
[mysqld]
# set basedir to your installation path
basedir=E:\\mysql
# set datadir to the location of your data directory
datadir=E:\\mydata\\data

   The rules for use of backslash in option file values are given in
   Section 4.2.3.3, "Using Option Files."

   MySQL Enterprise For expert advice on the start-up options
   appropriate to your circumstances, subscribe to the MySQL
   Enterprise Monitor. For more information, see
   http://www.mysql.com/products/enterprise/advisors.html.

   In MySQL 5.1.23 and earlier, the MySQL installer places the data
   directory directly under the directory where you install MySQL. On
   MySQL 5.1.24 and later, the data directory is located within the
   AppData directory for the user running MySQL.

   If you would like to use a data directory in a different location,
   you should copy the entire contents of the data directory to the
   new location. For example, if you want to use E:\mydata as the
   data directory instead, you must do two things:

    1. Move the entire data directory and all of its contents from
       the default location (for example C:\Program Files\MySQL\MySQL
       Server 5.1\data) to E:\mydata.

    2. Use a --datadir option to specify the new data directory
       location each time you start the server.

2.5.5.3. Selecting a MySQL Server Type

   The following table shows the available servers for Windows in
   MySQL 5.1.20 and earlier.
   Binary Description
   mysqld-nt Optimized binary with named-pipe support
   mysqld Optimized binary without named-pipe support
   mysqld-debug Like mysqld-nt, but compiled with full debugging and
   automatic memory allocation checking

   The following table shows the available servers for Windows in
   MySQL 5.1.21 and later.
   Binary Description
   mysqld Optimized binary with named-pipe support
   mysqld-debug Like mysqld, but compiled with full debugging and
   automatic memory allocation checking

   All of the preceding binaries are optimized for modern Intel
   processors, but should work on any Intel i386-class or higher
   processor.

   Each of the servers in a distribution support the same set of
   storage engines. The SHOW ENGINES statement displays which engines
   a given server supports.

   All Windows MySQL 5.1 servers have support for symbolic linking of
   database directories.

   MySQL supports TCP/IP on all Windows platforms. MySQL servers on
   Windows support named pipes as indicated in the following list.
   However, the default is to use TCP/IP regardless of platform.
   (Named pipes are slower than TCP/IP in many Windows
   configurations.)

   Use of named pipes is subject to these conditions:

     * Named pipes are enabled only if you start the server with the
       --enable-named-pipe option. It is necessary to use this option
       explicitly because some users have experienced problems with
       shutting down the MySQL server when named pipes were used.

     * For MySQL 5.1.20 and earlier, named-pipe connections are
       allowed only by the mysqld-nt and mysqld-debug servers. For
       MySQL 5.1.21 and later, the mysqld and mysqld-debug servers
       both contain support for named-pipe connections.

Note

   Most of the examples in this manual use mysqld as the server name.
   If you choose to use a different server, such as mysqld-nt or
   mysqld-debug, make the appropriate substitutions in the commands
   that are shown in the examples.

2.5.5.4. Starting the Server for the First Time

   This section gives a general overview of starting the MySQL
   server. The following sections provide more specific information
   for starting the MySQL server from the command line or as a
   Windows service.

   The information here applies primarily if you installed MySQL
   using the Noinstall version, or if you wish to configure and test
   MySQL manually rather than with the GUI tools.

   The examples in these sections assume that MySQL is installed
   under the default location of C:\Program Files\MySQL\MySQL Server
   5.1. Adjust the path names shown in the examples if you have MySQL
   installed in a different location.

   Clients have two options. They can use TCP/IP, or they can use a
   named pipe if the server supports named-pipe connections.

   MySQL for Windows also supports shared-memory connections if the
   server is started with the --shared-memory option. Clients can
   connect through shared memory by using the --protocol=MEMORY
   option.

   For information about which server binary to run, see Section
   2.5.5.3, "Selecting a MySQL Server Type."

   Testing is best done from a command prompt in a console window (or
   "DOS window"). In this way you can have the server display status
   messages in the window where they are easy to see. If something is
   wrong with your configuration, these messages make it easier for
   you to identify and fix any problems.

   To start the server, enter this command:
C:\> "C:\Program Files\MySQL\MySQL Server 5.1\bin\mysqld" --console

   For a server that includes InnoDB support, you should see the
   messages similar to those following as it starts (the path names
   and sizes may differ):
InnoDB: The first specified datafile c:\ibdata\ibdata1 did not exist:
InnoDB: a new database to be created!
InnoDB: Setting file c:\ibdata\ibdata1 size to 209715200
InnoDB: Database physically writes the file full: wait...
InnoDB: Log file c:\iblogs\ib_logfile0 did not exist: new to be creat
ed
InnoDB: Setting log file c:\iblogs\ib_logfile0 size to 31457280
InnoDB: Log file c:\iblogs\ib_logfile1 did not exist: new to be creat
ed
InnoDB: Setting log file c:\iblogs\ib_logfile1 size to 31457280
InnoDB: Log file c:\iblogs\ib_logfile2 did not exist: new to be creat
ed
InnoDB: Setting log file c:\iblogs\ib_logfile2 size to 31457280
InnoDB: Doublewrite buffer not found: creating new
InnoDB: Doublewrite buffer created
InnoDB: creating foreign key constraint system tables
InnoDB: foreign key constraint system tables created
011024 10:58:25  InnoDB: Started

   When the server finishes its startup sequence, you should see
   something like this, which indicates that the server is ready to
   service client connections:
mysqld: ready for connections
Version: '5.1.46'  socket: ''  port: 3306

   The server continues to write to the console any further
   diagnostic output it produces. You can open a new console window
   in which to run client programs.

   If you omit the --console option, the server writes diagnostic
   output to the error log in the data directory (C:\Program
   Files\MySQL\MySQL Server 5.1\data by default). The error log is
   the file with the .err extension.

Note

   The accounts that are listed in the MySQL grant tables initially
   have no passwords. After starting the server, you should set up
   passwords for them using the instructions in Section 2.13,
   "Post-Installation Setup and Testing."

2.5.5.5. Starting MySQL from the Windows Command Line

   The MySQL server can be started manually from the command line.
   This can be done on any version of Windows.

   To start the mysqld server from the command line, you should start
   a console window (or "DOS window") and enter this command:
C:\> "C:\Program Files\MySQL\MySQL Server 5.1\bin\mysqld"

   The path to mysqld may vary depending on the install location of
   MySQL on your system.

   You can stop the MySQL server by executing this command:
C:\> "C:\Program Files\MySQL\MySQL Server 5.1\bin\mysqladmin" -u root
 shutdown

Note

   If the MySQL root user account has a password, you need to invoke
   mysqladmin with the -p option and supply the password when
   prompted.

   This command invokes the MySQL administrative utility mysqladmin
   to connect to the server and tell it to shut down. The command
   connects as the MySQL root user, which is the default
   administrative account in the MySQL grant system. Note that users
   in the MySQL grant system are wholly independent from any login
   users under Windows.

   If mysqld doesn't start, check the error log to see whether the
   server wrote any messages there to indicate the cause of the
   problem. The error log is located in the C:\Program
   Files\MySQL\MySQL Server 5.1\data directory. It is the file with a
   suffix of .err. You can also try to start the server as mysqld
   --console; in this case, you may get some useful information on
   the screen that may help solve the problem.

   The last option is to start mysqld with the --standalone and
   --debug-dbug options. In this case, mysqld writes a log file
   C:\mysqld.trace that should contain the reason why mysqld doesn't
   start. See MySQL Internals: Porting
   (http://forge.mysql.com/wiki/MySQL_Internals_Porting).

   Use mysqld --verbose --help to display all the options that mysqld
   supports.

2.5.5.6. Starting MySQL as a Windows Service

   On Windows, the recommended way to run MySQL is to install it as a
   Windows service, whereby MySQL starts and stops automatically when
   Windows starts and stops. A MySQL server installed as a service
   can also be controlled from the command line using NET commands,
   or with the graphical Services utility. Generally, to install
   MySQL as a Windows service you should be logged in using an
   account that has administrator rights.

   The Services utility (the Windows Service Control Manager) can be
   found in the Windows Control Panel (under Administrative Tools on
   Windows 2000, XP, Vista and Server 2003). To avoid conflicts, it
   is advisable to close the Services utility while performing server
   installation or removal operations from the command line.

   Before installing MySQL as a Windows service, you should first
   stop the current server if it is running by using the following
   command:
C:\> "C:\Program Files\MySQL\MySQL Server 5.1\bin\mysqladmin"
          -u root shutdown

Note

   If the MySQL root user account has a password, you need to invoke
   mysqladmin with the -p option and supply the password when
   prompted.

   This command invokes the MySQL administrative utility mysqladmin
   to connect to the server and tell it to shut down. The command
   connects as the MySQL root user, which is the default
   administrative account in the MySQL grant system. Note that users
   in the MySQL grant system are wholly independent from any login
   users under Windows.

   Install the server as a service using this command:
C:\> "C:\Program Files\MySQL\MySQL Server 5.1\bin\mysqld" --install

   The service-installation command does not start the server.
   Instructions for that are given later in this section.

   To make it easier to invoke MySQL programs, you can add the path
   name of the MySQL bin directory to your Windows system PATH
   environment variable:

     * On the Windows desktop, right-click on the My Computer icon,
       and select Properties.

     * Next select the Advanced tab from the System Properties menu
       that appears, and click the Environment Variables button.

     * Under System Variables, select Path, and then click the Edit
       button. The Edit System Variable dialogue should appear.

     * Place your cursor at the end of the text appearing in the
       space marked Variable Value. (Use the End key to ensure that
       your cursor is positioned at the very end of the text in this
       space.) Then enter the complete path name of your MySQL bin
       directory (for example, C:\Program Files\MySQL\MySQL Server
       5.1\bin), Note that there should be a semicolon separating
       this path from any values present in this field. Dismiss this
       dialogue, and each dialogue in turn, by clicking OK until all
       of the dialogues that were opened have been dismissed. You
       should now be able to invoke any MySQL executable program by
       typing its name at the DOS prompt from any directory on the
       system, without having to supply the path. This includes the
       servers, the mysql client, and all MySQL command-line
       utilities such as mysqladmin and mysqldump.
       You should not add the MySQL bin directory to your Windows
       PATH if you are running multiple MySQL servers on the same
       machine.

Warning

   You must exercise great care when editing your system PATH by
   hand; accidental deletion or modification of any portion of the
   existing PATH value can leave you with a malfunctioning or even
   unusable system.

   The following additional arguments can be used in MySQL 5.1 when
   installing the service:

     * You can specify a service name immediately following the
       --install option. The default service name is MySQL.

     * If a service name is given, it can be followed by a single
       option. By convention, this should be
       --defaults-file=file_name to specify the name of an option
       file from which the server should read options when it starts.
       The use of a single option other than --defaults-file is
       possible but discouraged. --defaults-file is more flexible
       because it enables you to specify multiple startup options for
       the server by placing them in the named option file.

     * You can also specify a --local-service option following the
       service name. This causes the server to run using the
       LocalService Windows account that has limited system
       privileges. This account is available only for Windows XP or
       newer. If both --defaults-file and --local-service are given
       following the service name, they can be in any order.

   For a MySQL server that is installed as a Windows service, the
   following rules determine the service name and option files that
   the server uses:

     * If the service-installation command specifies no service name
       or the default service name (MySQL) following the --install
       option, the server uses the a service name of MySQL and reads
       options from the [mysqld] group in the standard option files.

     * If the service-installation command specifies a service name
       other than MySQL following the --install option, the server
       uses that service name. It reads options from the [mysqld]
       group and the group that has the same name as the service in
       the standard option files. This allows you to use the [mysqld]
       group for options that should be used by all MySQL services,
       and an option group with the service name for use by the
       server installed with that service name.

     * If the service-installation command specifies a
       --defaults-file option after the service name, the server
       reads options only from the [mysqld] group of the named file
       and ignores the standard option files.

   As a more complex example, consider the following command:
C:\> "C:\Program Files\MySQL\MySQL Server 5.1\bin\mysqld"
          --install MySQL --defaults-file=C:\my-opts.cnf

   Here, the default service name (MySQL) is given after the
   --install option. If no --defaults-file option had been given,
   this command would have the effect of causing the server to read
   the [mysqld] group from the standard option files. However,
   because the --defaults-file option is present, the server reads
   options from the [mysqld] option group, and only from the named
   file.

   You can also specify options as Start parameters in the Windows
   Services utility before you start the MySQL service.

   Once a MySQL server has been installed as a service, Windows
   starts the service automatically whenever Windows starts. The
   service also can be started immediately from the Services utility,
   or by using a NET START MySQL command. The NET command is not case
   sensitive.

   When run as a service, mysqld has no access to a console window,
   so no messages can be seen there. If mysqld does not start, check
   the error log to see whether the server wrote any messages there
   to indicate the cause of the problem. The error log is located in
   the MySQL data directory (for example, C:\Program
   Files\MySQL\MySQL Server 5.1\data). It is the file with a suffix
   of .err.

   When a MySQL server has been installed as a service, and the
   service is running, Windows stops the service automatically when
   Windows shuts down. The server also can be stopped manually by
   using the Services utility, the NET STOP MySQL command, or the
   mysqladmin shutdown command.

   You also have the choice of installing the server as a manual
   service if you do not wish for the service to be started
   automatically during the boot process. To do this, use the
   --install-manual option rather than the --install option:
C:\> "C:\Program Files\MySQL\MySQL Server 5.1\bin\mysqld" --install-m
anual

   To remove a server that is installed as a service, first stop it
   if it is running by executing NET STOP MySQL. Then use the
   --remove option to remove it:
C:\> "C:\Program Files\MySQL\MySQL Server 5.1\bin\mysqld" --remove

   If mysqld is not running as a service, you can start it from the
   command line. For instructions, see Section 2.5.5.5, "Starting
   MySQL from the Windows Command Line."

   Please see Section 2.5.6, "Troubleshooting a MySQL Installation
   Under Windows," if you encounter difficulties during installation.

2.5.5.7. Testing The MySQL Installation

   You can test whether the MySQL server is working by executing any
   of the following commands:
C:\> "C:\Program Files\MySQL\MySQL Server 5.1\bin\mysqlshow"
C:\> "C:\Program Files\MySQL\MySQL Server 5.1\bin\mysqlshow" -u root
mysql
C:\> "C:\Program Files\MySQL\MySQL Server 5.1\bin\mysqladmin" version
 status proc
C:\> "C:\Program Files\MySQL\MySQL Server 5.1\bin\mysql" test

Note

   By default, mysqlshow will try to connect using the ODBC user.
   This user is not created by default. You should specify a valid
   user, or root with the right password to check the operation of
   the server.

   If mysqld is slow to respond to TCP/IP connections from client
   programs, there is probably a problem with your DNS. In this case,
   start mysqld with the --skip-name-resolve option and use only
   localhost and IP numbers in the Host column of the MySQL grant
   tables.

   You can force a MySQL client to use a named-pipe connection rather
   than TCP/IP by specifying the --pipe or --protocol=PIPE option, or
   by specifying . (period) as the host name. Use the --socket option
   to specify the name of the pipe if you do not want to use the
   default pipe name.

   Note that if you have set a password for the root account, deleted
   the anonymous account, or created a new user account, then you
   must use the appropriate -u and -p options with the commands shown
   above in order to connect with the MySQL Server. See Section
   4.2.2, "Connecting to the MySQL Server."

   For more information about mysqlshow, see Section 4.5.6,
   "mysqlshow --- Display Database, Table, and Column Information."

2.5.6. Troubleshooting a MySQL Installation Under Windows

   When installing and running MySQL for the first time, you may
   encounter certain errors that prevent the MySQL server from
   starting. The purpose of this section is to help you diagnose and
   correct some of these errors.

   Your first resource when troubleshooting server issues is the
   error log. The MySQL server uses the error log to record
   information relevant to the error that prevents the server from
   starting. The error log is located in the data directory specified
   in your my.ini file. The default data directory location is
   C:\Program Files\MySQL\MySQL Server 5.1\data. See Section 5.2.2,
   "The Error Log."

   Another source of information regarding possible errors is the
   console messages displayed when the MySQL service is starting. Use
   the NET START MySQL command from the command line after installing
   mysqld as a service to see any error messages regarding the
   starting of the MySQL server as a service. See Section 2.5.5.6,
   "Starting MySQL as a Windows Service."

   The following examples show other common error messages you may
   encounter when installing MySQL and starting the server for the
   first time:

     * If the MySQL server cannot find the mysql privileges database
       or other critical files, you may see these messages:
System error 1067 has occurred.
Fatal error: Can't open privilege tables: Table 'mysql.host' doesn't
exist
       These messages often occur when the MySQL base or data
       directories are installed in different locations than the
       default locations (C:\Program Files\MySQL\MySQL Server 5.1 and
       C:\Program Files\MySQL\MySQL Server 5.1\data, respectively).
       This situation may occur when MySQL is upgraded and installed
       to a new location, but the configuration file is not updated
       to reflect the new location. In addition, there may be old and
       new configuration files that conflict. Be sure to delete or
       rename any old configuration files when upgrading MySQL.
       If you have installed MySQL to a directory other than
       C:\Program Files\MySQL\MySQL Server 5.1, you need to ensure
       that the MySQL server is aware of this through the use of a
       configuration (my.ini) file. The my.ini file needs to be
       located in your Windows directory, typically C:\WINDOWS. You
       can determine its exact location from the value of the WINDIR
       environment variable by issuing the following command from the
       command prompt:
C:\> echo %WINDIR%
       An option file can be created and modified with any text
       editor, such as Notepad. For example, if MySQL is installed in
       E:\mysql and the data directory is D:\MySQLdata, you can
       create the option file and set up a [mysqld] section to
       specify values for the basedir and datadir options:
[mysqld]
# set basedir to your installation path
basedir=E:/mysql
# set datadir to the location of your data directory
datadir=D:/MySQLdata
       Note that Windows path names are specified in option files
       using (forward) slashes rather than backslashes. If you do use
       backslashes, double them:
[mysqld]
# set basedir to your installation path
basedir=C:\\Program Files\\MySQL\\MySQL Server 5.1
# set datadir to the location of your data directory
datadir=D:\\MySQLdata
       The rules for use of backslash in option file values are given
       in Section 4.2.3.3, "Using Option Files."
       If you change the datadir value in your MySQL configuration
       file, you must move the contents of the existing MySQL data
       directory before restarting the MySQL server.
       See Section 2.5.5.2, "Creating an Option File."

     * If you reinstall or upgrade MySQL without first stopping and
       removing the existing MySQL service and install MySQL using
       the MySQL Config Wizard, you may see this error:
Error: Cannot create Windows service for MySql. Error: 0
       This occurs when the Config Wizard tries to install the
       service and finds an existing service with the same name.
       One solution to this problem is to choose a service name other
       than mysql when using the configuration wizard. This allows
       the new service to be installed correctly, but leaves the
       outdated service in place. Although this is harmless, it is
       best to remove old services that are no longer in use.
       To permanently remove the old mysql service, execute the
       following command as a user with administrative privileges, on
       the command-line:
C:\> sc delete mysql
[SC] DeleteService SUCCESS
       If the sc utility is not available for your version of
       Windows, download the delsrv utility from
       http://www.microsoft.com/windows2000/techinfo/reskit/tools/exi
       sting/delsrv-o.asp and use the delsrv mysql syntax.

2.5.7. Upgrading MySQL on Windows

   This section lists some of the steps you should take when
   upgrading MySQL on Windows.

    1. Review Section 2.4.1, "Upgrading MySQL," for additional
       information on upgrading MySQL that is not specific to
       Windows.

    2. You should always back up your current MySQL installation
       before performing an upgrade. See Section 6.2, "Database
       Backup Methods."

    3. Download the latest Windows distribution of MySQL from
       http://dev.mysql.com/downloads/.

    4. Before upgrading MySQL, you must stop the server. If the
       server is installed as a service, stop the service with the
       following command from the command prompt:
C:\> NET STOP MySQL
       If you are not running the MySQL server as a service, use the
       following command to stop it:
C:\> "C:\Program Files\MySQL\MySQL Server 5.1\bin\mysqladmin" -u root
 shutdown

Note
       If the MySQL root user account has a password, you need to
       invoke mysqladmin with the -p option and supply the password
       when prompted.

    5. When upgrading to MySQL 5.1 from a version previous to 4.1.5,
       or when upgrading from a version of MySQL installed from a Zip
       archive to a version of MySQL installed with the MySQL
       Installation Wizard, you must manually remove the previous
       installation and MySQL service (if the server is installed as
       a service).
       To remove the MySQL service, use the following command:
C:\> C:\mysql\bin\mysqld --remove
       If you do not remove the existing service, the MySQL
       Installation Wizard may fail to properly install the new MySQL
       service.

    6. When upgrading from MySQL 5.1.23 to MySQL 5.1.24, the change
       in the default location of the data directory from a directory
       within the MySQL installation to the AppData folder means that
       you must manually copy the data files from your old
       installation to the new location.

    7. If you are using the MySQL Installation Wizard, start the
       wizard as described in Section 2.5.3.1, "Using the MySQL
       Installation Wizard."

    8. If you are installing MySQL from a Zip archive, extract the
       archive. You may either overwrite your existing MySQL
       installation (usually located at C:\mysql), or install it into
       a different directory, such as C:\mysql5. Overwriting the
       existing installation is recommended.

    9. If you were running MySQL as a Windows service and you had to
       remove the service earlier in this procedure, reinstall the
       service. (See Section 2.5.5.6, "Starting MySQL as a Windows
       Service.")
   10. Restart the server. For example, use NET START MySQL if you
       run MySQL as a service, or invoke mysqld directly otherwise.
   11. If you encounter errors, see Section 2.5.6, "Troubleshooting a
       MySQL Installation Under Windows."

2.5.8. Windows Post-Installation Procedures

   On Windows, the data directory and the grant tables do not have to
   be created. MySQL Windows distributions include the grant tables
   with a set of preinitialized accounts in the mysql database under
   the data directory. It is unnecessary to run the mysql_install_db
   script that is used on Unix. Regarding passwords, if you installed
   MySQL using the Windows Installation Wizard, you may have already
   assigned passwords to the accounts. (See Section 2.5.3.1, "Using
   the MySQL Installation Wizard.") Otherwise, use the
   password-assignment procedure given in Section 2.13.2, "Securing
   the Initial MySQL Accounts."

   Before setting up passwords, you might want to try running some
   client programs to make sure that you can connect to the server
   and that it is operating properly. Make sure that the server is
   running (see Section 2.5.5.4, "Starting the Server for the First
   Time"), and then issue the following commands to verify that you
   can retrieve information from the server. The output should be
   similar to what is shown here:
C:\> C:\mysql\bin\mysqlshow
+--------------------+
|     Databases      |
+--------------------+
| information_schema |
| mysql              |
| test               |
+--------------------+

Note

   The above may not work if the correct user does not exist. If you
   installed using the MSI packages and used the MySQL Server
   Instance Config Wizard, then the root will haqve been created
   automatically with the password you supplied. In this case, you
   should use the -u and -p options where you will be prompted for
   the password.

Note

   The list of installed databases may vary, but will always include
   the minimum of mysql and information_schema. In most cases, the
   test database will also be installed automatically.

   If you specify the name of the database, then a list of the tables
   within a given database will be displayed:
C:\> C:\mysql\bin\mysqlshow mysql
Database: mysql
+---------------------------+
|          Tables           |
+---------------------------+
| columns_priv              |
| db                        |
| event                     |
| func                      |
| general_log               |
| help_category             |
| help_keyword              |
| help_relation             |
| help_topic                |
| host                      |
| plugin                    |
| proc                      |
| procs_priv                |
| servers                   |
| slow_log                  |
| tables_priv               |
| time_zone                 |
| time_zone_leap_second     |
| time_zone_name            |
| time_zone_transition      |
| time_zone_transition_type |
| user                      |
+---------------------------+


C:\> C:\mysql\bin\mysql -e "SELECT Host,Db,User FROM db" mysql
+------+-------+------+
| host | db    | user |
+------+-------+------+
| %    | test% |      |
+------+-------+------+

   You may need to specify a different directory from the one shown;
   if you used the Windows Installation Wizard, then the default
   directory is C:\Program Files\MySQL\MySQL Server 5.1, and the
   mysql and mysqlshow client programs are in C:\Program
   Files\MySQL\MySQL Server 5.1\bin. See Section 2.5.3.1, "Using the
   MySQL Installation Wizard," for more information.

   If you have already secured the initial MySQL accounts, you may
   need to use the -u and -p options to supply a user name and
   password to the mysqlshow and mysql client programs; otherwise the
   programs may fail with an error, or you may not be able to view
   all databases. For example, if you have assigned the password
   "secretpass" to the MySQL root account, then you can invoke
   mysqlshow and mysql as shown here:
C:\> C:\mysql\bin\mysqlshow -uroot -psecretpass
+--------------------+
|     Databases      |
+--------------------+
| information_schema |
| mysql              |
| test               |
+--------------------+

C:\> C:\mysql\bin\mysqlshow -uroot -psecretpass mysql
Database: mysql
+---------------------------+
|          Tables           |
+---------------------------+
| columns_priv              |
| db                        |
| event                     |
| func                      |
| general_log               |
| help_category             |
| help_keyword              |
| help_relation             |
| help_topic                |
| host                      |
| plugin                    |
| proc                      |
| procs_priv                |
| servers                   |
| slow_log                  |
| tables_priv               |
| time_zone                 |
| time_zone_leap_second     |
| time_zone_name            |
| time_zone_transition      |
| time_zone_transition_type |
| user                      |
+---------------------------+


C:\> C:\mysql\bin\mysql -uroot -psecretpass -e "SELECT Host,Db,User F
ROM db" mysql
+------+-------+------+
| host | db    | user |
+------+-------+------+
| %    | test% |      |
+------+-------+------+

   For more information about these programs, see Section 4.5.6,
   "mysqlshow --- Display Database, Table, and Column Information,"
   and Section 4.5.1, "mysql --- The MySQL Command-Line Tool."

   If you are running a version of Windows that supports services and
   you want the MySQL server to run automatically when Windows
   starts, see Section 2.5.5.6, "Starting MySQL as a Windows
   Service."

2.5.9. MySQL on Windows Compared to MySQL on Unix

   MySQL for Windows has proven itself to be very stable. The Windows
   version of MySQL has the same features as the corresponding Unix
   version, with the following exceptions:

     * Limited number of ports
       Windows systems have about 4,000 ports available for client
       connections, and after a connection on a port closes, it takes
       two to four minutes before the port can be reused. In
       situations where clients connect to and disconnect from the
       server at a high rate, it is possible for all available ports
       to be used up before closed ports become available again. If
       this happens, the MySQL server appears to be unresponsive even
       though it is running. Note that ports may be used by other
       applications running on the machine as well, in which case the
       number of ports available to MySQL is lower.
       For more information about this problem, see
       http://support.microsoft.com/default.aspx?scid=kb;en-us;196271
       .

     * Concurrent reads
       MySQL depends on the pread() and pwrite() system calls to be
       able to mix INSERT and SELECT. Currently, we use mutexes to
       emulate pread() and pwrite(). We intend to replace the file
       level interface with a virtual interface in the future so that
       we can use the readfile()/writefile() interface to get more
       speed. The current implementation limits the number of open
       files that MySQL 5.1 can use to 2,048, which means that you
       cannot run as many concurrent threads on Windows as on Unix.

     * Blocking read
       MySQL uses a blocking read for each connection. That has the
       following implications if named-pipe connections are enabled:

          + A connection is not disconnected automatically after
            eight hours, as happens with the Unix version of MySQL.

          + If a connection hangs, it is not possible to break it
            without killing MySQL.

          + mysqladmin kill does not work on a sleeping connection.

          + mysqladmin shutdown cannot abort as long as there are
            sleeping connections.
       We plan to fix this problem in the future.

     * ALTER TABLE
       While you are executing an ALTER TABLE statement, the table is
       locked from being used by other threads. This has to do with
       the fact that on Windows, you can't delete a file that is in
       use by another thread. In the future, we may find some way to
       work around this problem.

     * DATA DIRECTORY and INDEX DIRECTORY
       The DATA DIRECTORY and INDEX DIRECTORY options for CREATE
       TABLE are ignored on Windows, because Windows doesn't support
       symbolic links. These options also are ignored on systems that
       have a nonfunctional realpath() call.

     * DROP DATABASE
       You cannot drop a database that is in use by another thread.

     * Case-insensitive names
       File names are not case sensitive on Windows, so MySQL
       database and table names are also not case sensitive on
       Windows. The only restriction is that database and table names
       must be specified using the same case throughout a given
       statement. See Section 8.2.2, "Identifier Case Sensitivity."

     * Directory and file names
       On Windows, MySQL Server supports only directory and file
       names that are compatible with the current ANSI code pages.
       For example, the following Japanese directory name will not
       work in the Western locale (code page 1252):
datadir="C:/私たちのプロジェクトのデータ"
       The same limitation applies to directory and file names
       referred to in SQL statements, such as the data file path name
       in LOAD DATA INFILE.

     * The "\" path name separator character
       Path name components in Windows are separated by the "\"
       character, which is also the escape character in MySQL. If you
       are using LOAD DATA INFILE or SELECT ... INTO OUTFILE, use
       Unix-style file names with "/" characters:
mysql> LOAD DATA INFILE 'C:/tmp/skr.txt' INTO TABLE skr;
mysql> SELECT * INTO OUTFILE 'C:/tmp/skr.txt' FROM skr;
       Alternatively, you must double the "\" character:
mysql> LOAD DATA INFILE 'C:\\tmp\\skr.txt' INTO TABLE skr;
mysql> SELECT * INTO OUTFILE 'C:\\tmp\\skr.txt' FROM skr;

     * Problems with pipes
       Pipes do not work reliably from the Windows command-line
       prompt. If the pipe includes the character ^Z / CHAR(24),
       Windows thinks that it has encountered end-of-file and aborts
       the program.
       This is mainly a problem when you try to apply a binary log as
       follows:
C:\> mysqlbinlog binary_log_file | mysql --user=root
       If you have a problem applying the log and suspect that it is
       because of a ^Z / CHAR(24) character, you can use the
       following workaround:
C:\> mysqlbinlog binary_log_file --result-file=/tmp/bin.sql
C:\> mysql --user=root --execute "source /tmp/bin.sql"
       The latter command also can be used to reliably read in any
       SQL file that may contain binary data.

     * Access denied for user error
       If MySQL cannot resolve your host name properly, you may get
       the following error when you attempt to run a MySQL client
       program to connect to a server running on the same machine:
Access denied for user 'some_user'@'unknown'
to database 'mysql'
       To fix this problem, you should create a file named
       \windows\hosts containing the following information:
127.0.0.1       localhost

   Here are some open issues for anyone who might want to help us
   improve MySQL on Windows:

     * Add macros to use the faster thread-safe increment/decrement
       methods provided by Windows.

2.5.10. Installing MySQL from Source on Windows

   These instructions describe how to build binaries from source for
   MySQL 5.1 on Windows. Instructions are provided for building
   binaries from a standard source distribution or from the Bazaar
   tree that contains the latest development source.

Note

   The instructions here are strictly for users who want to test
   MySQL on Microsoft Windows from the latest source distribution or
   from the Bazaar tree. For production use, we do not advise using a
   MySQL server built by yourself from source. Normally, it is best
   to use precompiled binary distributions of MySQL that are built
   specifically for optimal performance on Windows by Oracle
   Corporation. Instructions for installing binary distributions are
   available in Section 2.5, "Installing MySQL on Windows."

   To build MySQL on Windows from source, you must satisfy the
   following system, compiler, and resource requirements:

     * Windows 2000, Windows XP, or newer version.
       Windows Vista is supported when using Visual Studio 2005
       provided you have installed the following updates:

          + Microsoft Visual Studio 2005 Professional Edition - ENU
            Service Pack 1 (KB926601)
            (http://support.microsoft.com/?kbid=926601)

          + Security Update for Microsoft Visual Studio 2005
            Professional Edition - ENU (KB937061)
            (http://support.microsoft.com/?kbid=937061)

          + Update for Microsoft Visual Studio 2005 Professional
            Edition - ENU (KB932232)
            (http://support.microsoft.com/?kbid=932232)

     * CMake, which can be downloaded from http://www.cmake.org.
       After installing, modify your path to include the cmake
       binary.

     * Microsoft Visual C++ 2005 Express Edition, Visual Studio .Net
       2003 (7.1), or Visual Studio 2005 (8.0) compiler system.

     * If you are using Visual C++ 2005 Express Edition, you must
       also install an appropriate Platform SDK. More information and
       links to downloads for various Windows platforms is available
       from
       http://www.microsoft.com/downloads/details.aspx?familyid=0baf2
       b35-c656-4969-ace8-e4c0c0716adb.

     * If you are compiling from a Bazaar tree or making changes to
       the parser, you need bison for Windows, which can be
       downloaded from
       http://gnuwin32.sourceforge.net/packages/bison.htm. Download
       the package labeled "Complete package, excluding sources".
       After installing the package, modify your path to include the
       bison binary and ensure that this binary is accessible from
       Visual Studio.

     * Cygwin might be necessary if you want to run the test script
       or package the compiled binaries and support files into a Zip
       archive. (Cygwin is needed only to test or package the
       distribution, not to build it.) Cygwin is available from
       http://cygwin.com.

     * 3GB to 5GB of disk space.

   The exact system requirements for Visual Studio can be found here:
   http://msdn.microsoft.com/vstudio/Previous/2003/sysreqs/default.as
   px and
   http://msdn.microsoft.com/vstudio/products/sysreqs/default.aspx

   You also need a MySQL source distribution for Windows, which can
   be obtained two ways:

     * Obtain a source distribution packaged by Oracle Corporation.
       These are available from http://dev.mysql.com/downloads/.

     * Package a source distribution yourself from the latest Bazaar
       developer source tree. For instructions on pulling the latest
       source files, see Section 2.3.3, "Installing from the
       Development Source Tree."

   If you find something not working as expected, or you have
   suggestions about ways to improve the current build process on
   Windows, please send a message to the win32 mailing list. See
   Section 1.6.1, "MySQL Mailing Lists."

2.5.10.1. Building MySQL from Source Using CMake and Visual Studio

   You can build MySQL on Windows by using a combination of cmake and
   Microsoft Visual Studio .NET 2003 (7.1), Microsoft Visual Studio
   2005 (8.0), Microsoft Visual Studio 2008 (9.0) or Microsoft Visual
   C++ 2005 Express Edition. You must have the appropriate Microsoft
   Platform SDK installed.

Note

   To compile from the source code on Windows you must use the
   standard source distribution (for example, mysql-5.1.46.tar.gz).
   You build from the same distribution as used to build MySQL on
   Unix, Linux and other platforms. Do not use the Windows Source
   distributions as they do not contain the necessary configuration
   script and other files.

   Follow this procedure to build MySQL:

    1. If you are installing from a packaged source distribution,
       create a work directory (for example, C:\workdir), and unpack
       the source distribution there using WinZip or another Windows
       tool that can read .zip files. This directory is the work
       directory in the following instructions.

Note
       You must run the commands in the win directory from the
       top-level source directory. Do not change into the win
       directory, as the commands will not be executed correctly.

    2. Start a command shell. If you have not configured the PATH and
       other environment variables for all command shells, you may be
       able to start a command shell from the Start Menu within the
       Windows Visual Studio menu that contains the necessary
       environment changes.

    3. Within the command shell, navigate to the work directory and
       run the following command:
C:\workdir>win\configure.js options
       If you have associated the .js file extension with an
       application such as a text editor, then you may need to use
       the following command to force configure.js to be executed as
       a script:
C:\workdir>cscript win\configure.js options
       These options are available for configure.js:

          + WITH_INNOBASE_STORAGE_ENGINE: Enable the InnoDB storage
            engine.

          + WITH_PARTITION_STORAGE_ENGINE: Enable user-defined
            partitioning.

          + WITH_ARCHIVE_STORAGE_ENGINE: Enable the ARCHIVE storage
            engine.

          + WITH_BLACKHOLE_STORAGE_ENGINE: Enable the BLACKHOLE
            storage engine.

          + WITH_EXAMPLE_STORAGE_ENGINE: Enable the EXAMPLE storage
            engine.

          + WITH_FEDERATED_STORAGE_ENGINE: Enable the FEDERATED
            storage engine.

          + WITH_NDBCLUSTER_STORAGE_ENGINE (experimental): Enable the
            NDBCLUSTER storage engine in the MySQL server; cause
            binaries for the MySQL Cluster management and data node,
            management client, and other programs to be built.
            This option is supported only in MySQL Cluster NDB 7.0
            (NDBCLUSTER storage engine versions 6.4.0 and later)
            using the MySQL Cluster sources. It cannot be used to
            enable clustering support in other MySQL source trees or
            distributions.

          + MYSQL_SERVER_SUFFIX=suffix: Server suffix, default none.

          + COMPILATION_COMMENT=comment: Server comment, default
            "Source distribution".

          + MYSQL_TCP_PORT=port: Server port, default 3306.

          + DISABLE_GRANT_OPTIONS: Disables the --bootstrap,
            --skip-grant-tables, and --init-file options for mysqld.
            This option is available as of MySQL 5.1.15.
       For example (type the command on one line):
C:\workdir>win\configure.js WITH_INNOBASE_STORAGE_ENGINE
             WITH_PARTITION_STORAGE_ENGINE MYSQL_SERVER_SUFFIX=-pro

    4. From the work directory, execute the win\build-vs9.bat
       (Windows Visual Studio 2008), win\build-vs8.bat (Windows
       Visual Studio 2005), or win\build-vs71.bat (Windows Visual
       Stidion 2003) script, depending on the version of Visual
       Studio you have installed. The script invokes CMake, which
       generates the mysql.sln solution file.
       You can also use the corresponding 64-bit file (for example
       win\build-vs8_x64.bat or win\build-vs9_x64.bat) to build the
       64-bit version of MySQL. However, you cannot build the 64-bit
       version with Visual Studio Express Edition. You must use
       Visual Studio 2005 (8.0) or higher.

    5. From the work directory, open the generated mysql.sln file
       with Visual Studio and select the proper configuration using
       the Configuration menu. The menu provides Debug, Release,
       RelwithDebInfo, MinRelInfo options. Then select Solution >
       Build to build the solution.
       Remember the configuration that you use in this step. It is
       important later when you run the test script because that
       script needs to know which configuration you used.

    6. Test the server. The server built using the preceding
       instructions expects that the MySQL base directory and data
       directory are C:\mysql and C:\mysql\data by default. If you
       want to test your server using the source tree root directory
       and its data directory as the base directory and data
       directory, you need to tell the server their path names. You
       can either do this on the command line with the --basedir and
       --datadir options, or by placing appropriate options in an
       option file. (See Section 4.2.3.3, "Using Option Files.") If
       you have an existing data directory elsewhere that you want to
       use, you can specify its path name instead.
       When the server is running in standalone fashion or as a
       service based on your configuration, try to connect to it from
       the mysql interactive command-line utility.
       You can also run the standard test script, mysql-test-run.pl.
       This script is written in Perl, so you'll need either Cygwin
       or ActiveState Perl to run it. You may also need to install
       the modules required by the script. To run the test script,
       change location into the mysql-test directory under the work
       directory, set the MTR_VS_CONFIG environment variable to the
       configuration you selected earlier (or use the --vs-config
       option), and invoke mysql-test-run.pl. For example (using
       Cygwin and the bash shell):
shell> cd mysql-test
shell> export MTR_VS_CONFIG=debug
shell> ./mysql-test-run.pl --force --timer
shell> ./mysql-test-run.pl --force --timer --ps-protocol

   When you are satisfied that the programs you have built are
   working correctly, stop the server. Now you can install the
   distribution. One way to do this is to use the make_win_bin_dist
   script in the scripts directory of the MySQL source distribution
   (see Section 4.4.2, "make_win_bin_dist --- Package MySQL
   Distribution as ZIP Archive"). This is a shell script, so you must
   have Cygwin installed if you want to use it. It creates a Zip
   archive of the built executables and support files that you can
   unpack in the location at which you want to install MySQL.

   It is also possible to install MySQL by copying directories and
   files directly:

    1. Create the directories where you want to install MySQL. For
       example, to install into C:\mysql, use these commands:
C:\> mkdir C:\mysql
C:\> mkdir C:\mysql\bin
C:\> mkdir C:\mysql\data
C:\> mkdir C:\mysql\share
C:\> mkdir C:\mysql\scripts
       If you want to compile other clients and link them to MySQL,
       you should also create several additional directories:
C:\> mkdir C:\mysql\include
C:\> mkdir C:\mysql\lib
C:\> mkdir C:\mysql\lib\debug
C:\> mkdir C:\mysql\lib\opt
       If you want to benchmark MySQL, create this directory:
C:\> mkdir C:\mysql\sql-bench
       Benchmarking requires Perl support. See Section 2.15, "Perl
       Installation Notes."

    2. From the work directory, copy into the C:\mysql directory the
       following files and directories:
C:\> cd \workdir
C:\workdir> mkdir C:\mysql
C:\workdir> mkdir C:\mysql\bin
C:\workdir> copy client\Release\*.exe C:\mysql\bin
C:\workdir> copy sql\Release\mysqld.exe C:\mysql\bin\mysqld.exe
C:\workdir> xcopy scripts\*.* C:\mysql\scripts /E
C:\workdir> xcopy share\*.* C:\mysql\share /E
       If you want to compile other clients and link them to MySQL,
       you should also copy several libraries and header files:
C:\workdir> copy lib\Release\mysqlclient.lib C:\mysql\lib\debug
C:\workdir> copy lib\Release\libmysql.* C:\mysql\lib\debug
C:\workdir> copy lib\Release\zlib.* C:\mysql\lib\debug
C:\workdir> copy lib\Release\mysqlclient.lib C:\mysql\lib\opt
C:\workdir> copy lib\Release\libmysql.* C:\mysql\lib\opt
C:\workdir> copy lib\Release\zlib.* C:\mysql\lib\opt
C:\workdir> copy include\*.h C:\mysql\include
C:\workdir> copy libmysql\libmysql.def C:\mysql\include

Note
       If you have compiled a Debug, rather than Release solution,
       you can replace Release with Debug in the source file names
       shown above.
       If you want to benchmark MySQL, you should also do this:
C:\workdir> xcopy sql-bench\*.* C:\mysql\bench /E

   After installation, set up and start the server in the same way as
   for binary Windows distributions. This includes creating the
   system tables by running mysql_install_db. For more information,
   see Section 2.5, "Installing MySQL on Windows."

2.5.11. Compiling MySQL Clients on Windows

   In your source files, you should include my_global.h before
   mysql.h:
#include <my_global.h>
#include <mysql.h>

   my_global.h includes any other files needed for Windows
   compatibility (such as windows.h) if you compile your program on
   Windows.

   You can either link your code with the dynamic libmysql.lib
   library, which is just a wrapper to load in libmysql.dll on
   demand, or link with the static mysqlclient.lib library.

   The MySQL client libraries are compiled as threaded libraries, so
   you should also compile your code to be multi-threaded.

2.6. Installing MySQL on Linux

   The following sections covers the installation of Linux using
   RPMs. For information on using a generic binary package using tar,
   see Section 2.2, "Installing MySQL from Generic Binaries on
   Unix/Linux." For information on installing from source, see
   Section 2.3, "MySQL Installation Using a Source Distribution."

   mysql.server can be found in the support-files directory under the
   MySQL installation directory or in a MySQL source tree. You can
   install it as /etc/init.d/mysql for automatic MySQL startup and
   shutdown. See Section 2.13.1.2, "Starting and Stopping MySQL
   Automatically."

2.6.1. Installing MySQL from RPM Packages on Linux

   The recommended way to install MySQL on RPM-based Linux
   distributions is by using the RPM packages. The RPMs that we
   provide to the community should work on all versions of Linux that
   support RPM packages and use glibc 2.3. To obtain RPM packages,
   see Section 2.1.3, "How to Get MySQL."

   For non-RPM Linux distributions, you can install MySQL using a
   .tar.gz package. See Section 2.2, "Installing MySQL from Generic
   Binaries on Unix/Linux."

   We do provide some platform-specific RPMs; the difference between
   a platform-specific RPM and a generic RPM is that a
   platform-specific RPM is built on the targeted platform and is
   linked dynamically whereas a generic RPM is linked statically with
   LinuxThreads.

Note

   RPM distributions of MySQL often are provided by other vendors. Be
   aware that they may differ in features and capabilities from those
   built by us, and that the instructions in this manual do not
   necessarily apply to installing them. The vendor's instructions
   should be consulted instead.

   In most cases, you need to install only the MySQL-server and
   MySQL-client packages to get a functional MySQL installation. The
   other packages are not required for a standard installation.

   RPMs for MySQL Cluster.  Beginning with MySQL 5.1.24, standard
   MySQL server RPMs built by MySQL no longer provide support for the
   NDBCLUSTER storage engine. MySQL Cluster users wanting to upgrade
   MySQL 5.1.23 or earlier installations from RPMs built by MySQL
   should upgrade to MySQL Cluster NDB 6.2 or MySQL Cluster NDB 6.3;
   RPMs that should work with most Linux distributions are available
   for both of these release series.

Important

   When upgrading a MySQL Cluster RPM installation, you must upgrade
   all installed RPMs, including the Server and Client RPMs.

   For more information about installing MySQL Cluster from RPMs, see
   Section 17.2.1, "MySQL Cluster Multi-Computer Installation."

   For upgrades, if your installation was originally produced by
   installing multiple RPM packages, it is best to upgrade all the
   packages, not just some. For example, if you previously installed
   the server and client RPMs, do not upgrade just the server RPM.

   The RPM packages shown in the following list are available. The
   names shown here use a suffix of .glibc23.i386.rpm, but particular
   packages can have different suffixes, described later.

     * MySQL-server-VERSION.glibc23.i386.rpm
       The MySQL server. You need this unless you only want to
       connect to a MySQL server running on another machine.

     * MySQL-client-VERSION.glibc23.i386.rpm
       The standard MySQL client programs. You probably always want
       to install this package.

     * MySQL-devel-VERSION.glibc23.i386.rpm
       The libraries and include files that are needed if you want to
       compile other MySQL clients, such as the Perl modules.

     * MySQL-debuginfo-VERSION.glibc23.i386.rpm
       This package contains debugging information. debuginfo RPMs
       are never needed to use MySQL software; this is true both for
       the server and for client programs. However, they contain
       additional information that might be needed by a debugger to
       analyze a crash.

     * MySQL-shared-VERSION.glibc23.i386.rpm
       This package contains the shared libraries
       (libmysqlclient.so*) that certain languages and applications
       need to dynamically load and use MySQL. It contains
       single-threaded and thread-safe libraries. If you install this
       package, do not install the MySQL-shared-compat package.

     * MySQL-shared-compat-VERSION.glibc23.i386.rpm
       This package includes the shared libraries for MySQL 3.23,
       4.0, and so on, up to the current release. It contains
       single-threaded and thread-safe libraries. Install this
       package instead of MySQL-shared if you have applications
       installed that are dynamically linked against older versions
       of MySQL but you want to upgrade to the current version
       without breaking the library dependencies.

     * MySQL-shared-compat-advanced-gpl-VERSION.glibc23.i386.rpm,
       MySQL-shared-compat-advanced-VERSION.glibc23.i386.rpm
       These are like the MySQL-shared-compat package, but are for
       the "MySQL Enterprise Server - Advanced Edition" products.
       Install these packages rather than the normal
       MySQL-shared-compat package if you want to included shared
       client libraries for older MySQL versions.

     * MySQL-embedded-VERSION.glibc23.i386.rpm
       The embedded MySQL server library.

     * MySQL-ndb-management-VERSION.glibc23.i386.rpm,
       MySQL-ndb-storage-VERSION.glibc23.i386.rpm,
       MySQL-ndb-tools-VERSION.glibc23.i386.rpm,
       MySQL-ndb-extra-VERSION.glibc23.i386.rpm
       Packages that contain additional files for MySQL Cluster
       installations.

Note
       The MySQL-ndb-tools RPM requires a working installation of
       perl. Prior to MySQL 5.1.18, the DBI and HTML::Template
       packages were also required. See Section 2.15, "Perl
       Installation Notes," and Section 17.4.21, "ndb_size.pl ---
       NDBCLUSTER Size Requirement Estimator," for more information.

     * MySQL-test-VERSION.glibc23.i386.rpm
       This package includes the MySQL test suite.

     * MySQL-VERSION.src.rpm
       This contains the source code for all of the previous
       packages. It can also be used to rebuild the RPMs on other
       architectures (for example, Alpha or SPARC).

   The suffix of RPM package names (following the VERSION value) has
   the following syntax:
.PLATFORM.CPU.rpm

   The PLATFORM and CPU values indicate the type of system for which
   the package is built. PLATFORM indicates the platform and CPU
   indicates the processor type or family.

   All packages are dynamically linked against glibc 2.3. The
   PLATFORM value indicates whether the package is platform
   independent or intended for a specific platform, as shown in the
   following table.
   glibc23 Platform independent, should run on any Linux distribution
   that supports glibc 2.3
   rhel3, rhel4 Red Hat Enterprise Linux 3 or 4
   sles9, sles10 SuSE Linux Enterprise Server 9 or 10

   In MySQL 5.1, only glibc23 packages are available currently.

   The CPU value indicates the processor type or family for which the
   package is built.
   i386   x86 processor, 386 and up
   i586   x86 processor, Pentium and up
   x86_64 64-bit x86 processor
   ia64   Itanium (IA-64) processor

   To see all files in an RPM package (for example, a MySQL-server
   RPM), run a command like this:
shell> rpm -qpl MySQL-server-VERSION.glibc23.i386.rpm

   To perform a standard minimal installation, install the server and
   client RPMs:
shell> rpm -i MySQL-server-VERSION.glibc23.i386.rpm
shell> rpm -i MySQL-client-VERSION.glibc23.i386.rpm

   To install only the client programs, install just the client RPM:
shell> rpm -i MySQL-client-VERSION.glibc23.i386.rpm

   RPM provides a feature to verify the integrity and authenticity of
   packages before installing them. If you would like to learn more
   about this feature, see Section 2.1.4, "Verifying Package
   Integrity Using MD5 Checksums or GnuPG."

   The server RPM places data under the /var/lib/mysql directory. The
   RPM also creates a login account for a user named mysql (if one
   does not exist) to use for running the MySQL server, and creates
   the appropriate entries in /etc/init.d/ to start the server
   automatically at boot time. (This means that if you have performed
   a previous installation and have made changes to its startup
   script, you may want to make a copy of the script so that you
   don't lose it when you install a newer RPM.) See Section 2.13.1.2,
   "Starting and Stopping MySQL Automatically," for more information
   on how MySQL can be started automatically on system startup.

   If you want to install the MySQL RPM on older Linux distributions
   that do not support initialization scripts in /etc/init.d
   (directly or via a symlink), you should create a symbolic link
   that points to the location where your initialization scripts
   actually are installed. For example, if that location is
   /etc/rc.d/init.d, use these commands before installing the RPM to
   create /etc/init.d as a symbolic link that points there:
shell> cd /etc
shell> ln -s rc.d/init.d .

   However, all current major Linux distributions should support the
   new directory layout that uses /etc/init.d, because it is required
   for LSB (Linux Standard Base) compliance.

   If the RPM files that you install include MySQL-server, the mysqld
   server should be up and running after installation. You should be
   able to start using MySQL.

   If something goes wrong, you can find more information in the
   binary installation section. See Section 2.2, "Installing MySQL
   from Generic Binaries on Unix/Linux."

Note

   The accounts that are listed in the MySQL grant tables initially
   have no passwords. After starting the server, you should set up
   passwords for them using the instructions in Section 2.13,
   "Post-Installation Setup and Testing."

   During RPM installation, a user named mysql and a group named
   mysql are created on the system. This is done using the useradd,
   groupadd, and usermod commands. Those commands require appropriate
   administrative privileges, which is ensured for locally managed
   users and groups (as listed in the /etc/passwd and /etc/group
   files) by the RPM installation process being run by root.

   For nonlocal user management (LDAP, NIS, and so forth), the
   administrative tools may require additional authentication (such
   as a password), and will fail if the installing user does not
   provide this authentication. Even if they fail, the RPM
   installation will not abort but succeed, and this is intentional.
   If they failed, some of the intended transfer of ownership may be
   missing, and it is recommended that the system administrator then
   manually ensures some appropriate user andgroup exists and
   manually transfers ownership following the actions in the RPM spec
   file.

2.7. Installing MySQL on Mac OS X

   MySQL for Mac OS X is available in a number of different forms:

     * Native Package Installer format, which uses the native Mac OS
       X installer to walk you through the installation of MySQL. For
       more information, see Section 2.7.1, "Installing MySQL Using
       the Installation Package." You can use the package installer
       with Mac OS X 10.3 and later, and available for both PowerPC
       and Intel architectures, and both 32-bit and 64-bit
       architectures. There is no Universal Binary available using
       the package installation method. The user you use to perform
       the installation must have administrator privileges.

     * Tar package format, which uses a file packaged using the Unix
       tar and gzip commands. To use this method, you will need to
       open a Terminal window. You do not need administrator
       privileges using this method, as you can install the MySQL
       server anywhere using this method. For more information on
       using this method, you can use the generic instructions for
       using a tarball, Section 2.2, "Installing MySQL from Generic
       Binaries on Unix/Linux."You can use the package installer with
       Mac OS X 10.3 and later, and available for both PowerPC and
       Intel architectures, and both 32-bit and 64-bit architectures.
       A Universal Binary, incorporating both Power PC and Intel
       architectures and 32-bit and 64-bit binaries is available.
       In addition to the core installation, the Package Installer
       also includes Section 2.7.2, "Installing the MySQL Startup
       Item" and Section 2.7.3, "Installing and Using the MySQL
       Preference Pane," both of which simplify the management of
       your installation.

     * Mac OS X server includes a version of MySQL as standard. If
       you want to use a more recent version than that supplied with
       the Mac OS X server release, you can make use of the package
       or tar formats. For more information on using the MySQL
       bundled with Mac OS X, see Section 2.7.4, "Using MySQL on Mac
       OS X Server."

   For additional information on using MySQL on Mac OS X, see Section
   2.7.5, "MySQL Installation on Mac OS X Notes."

2.7.1. Installing MySQL Using the Installation Package

   You can install MySQL on Mac OS X 10.3.x ("Panther") or newer
   using a Mac OS X binary package in PKG format instead of the
   binary tarball distribution. Please note that older versions of
   Mac OS X (for example, 10.1.x or 10.2.x) are not supported by this
   package.

   The package is located inside a disk image (.dmg) file that you
   first need to mount by double-clicking its icon in the Finder. It
   should then mount the image and display its contents.

Note

   Before proceeding with the installation, be sure to shut down all
   running MySQL server instances by either using the MySQL Manager
   Application (on Mac OS X Server) or via mysqladmin shutdown on the
   command line.

   When installing from the package version, you should also install
   the MySQL Preference Pane, which will allow you to control the
   startup and execution of your MySQL server from System
   Preferences. For more information, see Section 2.7.3, "Installing
   and Using the MySQL Preference Pane."

   When installing using the package installer, the files are
   installed into a directory within /usr/local matching the name of
   the installation version and platform. For example, the installer
   file mysql-5.1.39-osx10.5-x86_64.pkg installs MySQL into
   /usr/local/mysql-5.1.39-osx10.5-x86_64 . The installation layout
   of the directory is as shown in the following table:
   Directory       Contents of Directory
   bin             Client programs and the mysqld server
   data            Log files, databases
   docs            Manual in Info format
   include         Include (header) files
   lib             Libraries
   man             Unix manual pages
   mysql-test      MySQL test suite
   scripts         Contains the mysql_install_db script
   share/mysql     Error message files
   sql-bench       Benchmarks
   support-files   Scripts and sample configuration files
   /tmp/mysql.sock The location of the MySQL Unix socket

   During the package installer process, a symbolic link from
   /usr/local/mysql to the version/platform specific directory
   created during installation will be created automatically.

    1. Download and open the MySQL package installer, which is
       provided on a disk image (.dmg). Double-click to open the disk
       image, which includes the main MySQL installation package, the
       MySQLStartupItem.pkg installation package, and the
       MySQL.prefPane.

    2. Double-click on the MySQL installer package. It will be named
       according to the version of MySQL you have downloaded. For
       example, if you have downloaded MySQL 5.1.39, double-click
       mysql-5.1.39-osx10.5-x86.pkg.

    3. You will be presented with the openin installer dialog. Click
       Continue to begihn installation.
       MySQL Package Installer: Step 1

    4. A copy of the installation instructions and other important
       information relevant to this installation are display. Click
       Continue .

    5. If you have downloaded the community version of MySQL, you
       will be shown a copy of the relevent GNU General Public
       License. Click Continue .

    6. Select the drive you want to use to install the MySQL Startup
       Item. The drive must have a valid, bootable, Mac OS X
       operating system installed. Click Continue.
       MySQL Package Installer: Step 4

    7. You will be asked to confirm the details of the installation,
       including the space required for the installation. To change
       the drive on which the startup item is installed you can click
       either Go Back or Change Install Location.... To install the
       startup item, click Install.

    8. Once the installation has been completed successfully, you
       will be given an Install Succeeded message.

   Once you have completed the basic installation, you must complete
   the post-installation steps as specifed in Section 2.13,
   "Post-Installation Setup and Testing."

   For convenience, you may also want to install the Section 2.7.2,
   "Installing the MySQL Startup Item" and Section 2.7.3, "Installing
   and Using the MySQL Preference Pane."

2.7.2. Installing the MySQL Startup Item

   The MySQL Installation Package includes a startup item that can be
   used to automatically startup and shutdown MySQL during boot.

   To install the MySQL Startup Item:

    1. Download and open the MySQL package installer, which is
       provided on a disk image (.dmg). Double-click to open the disk
       image, which includes the main MySQL installation package, the
       MySQLStartupItem.pkg installation package, and the
       MySQL.prefPane.

    2. Double-click on the MySQLStartItem.pkg file to start the
       installation process.

    3. You will be presented with the Install MySQL Startup Item
       dialog.
       MySQL Startup Item Installer: Step 1
       Click Continue to continue the installation process.

    4. A copy of the installation instructions and other important
       information relevant to this installation are display. Click
       Continue .

    5. Select the drive you want to use to install the MySQL Startup
       Item. The drive must have a valid, bootable, Mac OS X
       operating system installed. Click Continue.
       MySQL Startup Item Installer: Step 3

    6. You will be asked to confirm the details of the installation.
       To change the drive on which the startup item is installed you
       can click either Go Back or Change Install Location.... To
       install the startup item, click Install.

    7. Once the installation has been completed successfully, you
       will be given an Install Succeeded message.
       MySQL Startup Item Installer: Step 5

   The Startup Item for MySQL is installed into
   /Library/StartupItems/MySQLCOM. The Startup Item installation adds
   a variable MYSQLCOM=-YES- to the system configuration file
   /etc/hostconfig. If you want to disable the automatic startup of
   MySQL, simply change this variable to MYSQLCOM=-NO-.

   After the installation, you can start up MySQL by running the
   following commands in a terminal window. You must have
   administrator privileges to perform this task.

   If you have installed the Startup Item, use this command to start
   the server:
shell> sudo /Library/StartupItems/MySQLCOM/MySQLCOM start

   You may be prompted for your password to complete the startup.

   If you have installed the Startup Item, use this command to stop
   the server:
shell> sudo /Library/StartupItems/MySQLCOM/MySQLCOM stop

   You may be prompted for your password to complete the shutdown.

2.7.3. Installing and Using the MySQL Preference Pane

   The MySQL Package installer disk image also includes a custom
   MySQL Preference Pane that enables you to start, stop and control
   automated startup during boot of your MySQL installation.

   To install the MySQL Preference Pane:

    1. Download and open the MySQL package installer package, which
       is provided on a disk image (.dmg). Double-click to open the
       disk image, which includes the main MySQL installation
       package, the MySQLStartupItem.pkg installation package, and
       the MySQL.prefPane.

    2. Double click on MySQL.prefPane. The MySQL System Preferences
       will open.

    3. If this is the first time you have installed the preference
       pane, you will be asked to confirm installation and whether
       you want to install the preference pane for all users, or only
       the current user. To install the preference pane for all users
       you will need administrator privileges. If necessary, you will
       be prompted for the username and password for a user with
       administrator privileges.

    4. If you already have the MySQL Preference Pane installed, you
       will be asked to confirm whether you want to overwrite the
       existing MySQL Preference Pane.

Note

   The MySQL Preference Pane only starts and stops MySQL installation
   installed from the MySQL package installation that have been
   installed in the default location.

   Once the MySQL Preference Pane has been installed, you can control
   your MySQL server instance using the preference pane. To use the
   preference pane, open the System Preferences... from the Apple
   menu. Select the MySQL preference pane by clicking on the MySQL
   logo within the Other section of the preference panes list.
   MySQL Preference Pane

   The MySQL Preference Pane shows the current status of the MySQL
   server, showing stopped (in red) if the server is not running and
   running (in green) if the server has already been started. The
   preference pane will also show the current setting for whether the
   MySQL server has been set to start up automatically.

     * To start MySQL using the preference pane: 
       Click Start MySQL Server. You may be prompted for the username
       and password of a user with administrator privileges to start
       the MySQL server.

     * To stop MySQL using the preference pane: 
       Click Stop MySQL Server. You may be prompted for the username
       and password of a user with administrator privileges to
       shutdown the MySQL server.

     * To automatically start the MySQL server when the system boots:
       Check the checkbox next to Automatically Start MySQL Server on
       Startup.

     * To disable the automatic starting of the MySQL server when the
       system boots:
       Uncheck the checkbox next to Automatically Start MySQL Server
       on Startup.

   You can close the System Preferences... once you have completed
   your settings.

2.7.4. Using MySQL on Mac OS X Server

   If you are running Mac OS X Server, a version of MySQL should
   already be installed. The following table shows the versions of
   MySQL that ship with Mac OS X Server versions.
   Mac OS X Server Version MySQL Version
   10.2-10.2.2             3.23.51
   10.2.3-10.2.6           3.23.53
   10.3                    4.0.14
   10.3.2                  4.0.16
   10.4.0                  4.1.10a
   10.5.0                  5.0.45
   10.6.0                  5.0.82

   The installation layout of MySQL on Mac OS X Server is as shown in
   the table below:
   Directory                   Contents of Directory
   /usr/bin                    Client programs
   /var/mysql                  Log files, databases
   /usr/libexec                The mysqld server
   /usr/share/man              Unix manual pages
   /usr/share/mysql/mysql-test MySQL test suite
   /usr/share/mysql            Contains the mysql_install_db script
   /var/mysql/mysql.sock       The location of the MySQL Unix socket

Note

   The MySQL server bundled with Mac OS X Server does not include the
   MySQL client libraries and header files required if you want to
   access and use MySQL from a third-party driver, such as Perl DBI
   or PHP. For more information on obtaining and installing MySQL
   libraries, see Mac OS X Server version 10.5: MySQL libraries
   available for download (http://support.apple.com/kb/TA25017).
   Alternatively, you can ignore the bundled MySQL server and install
   MySQL from the package or tarball installation.

   For more information on managing the bundled MySQL instance in Mac
   OS X Server 10.5, see Mac OS X Server: Web Technologies
   Administration For Version 10.5 Leopard
   (http://images.apple.com/server/macosx/docs/Web_Technologies_Admin
   _v10.5.pdf). For more information on managing the bundled MySQL
   instance in Mac OS X Server 10.6, see Mac OS X Server: Web
   Technologies Administration Version 10.6 Snow Leopard
   (http://manuals.info.apple.com/en_US/WebTech_v10.6.pdf).

2.7.5. MySQL Installation on Mac OS X Notes

   You should keep the following issues and notes in mind:

     * The default location for the MySQL Unix socket is different on
       Mac OS X and Mac OS X Server depending on the installation
       type you chose. The default locations by installation are as
       follows:

       Package Installer from MySQL       /tmp/mysql.sock
       Tarball from MySQL                 /tmp/mysql.sock
       MySQL Bundled with Mac OS X Server /var/mysql/mysql.sock
       To prevent issues, you should either change the configuration
       of the socket used within your application (for example,
       changing php.ini), or you should configure the socket location
       using a MySQL configuration file and the socket option. For
       more information, see Section 5.1.2, "Server Command Options."

     * You may need (or want) to create a specific mysql user to own
       the MySQL directory and data. On Mac OS X 10.4 and lower you
       can do this by using the Netinfo Manager application, located
       within the Utilities folder within the Applications folder. On
       Mac OS X 10.5 and later you can do this through the Directory
       Utility. From Mac OS X 10.5 and later (including Mac OS X
       Server 10.5) the mysql should already exist. For use in single
       user mode, an entry for _mysql (note the underscore prefix)
       should already exist within the system /etc/passwd file.

     * Due to a bug in the Mac OS X package installer, you may see
       this error message in the destination disk selection dialog:
You cannot install this software on this disk. (null)
       If this error occurs, simply click the Go Back button once to
       return to the previous screen. Then click Continue to advance
       to the destination disk selection again, and you should be
       able to choose the destination disk correctly. We have
       reported this bug to Apple and it is investigating this
       problem.

     * Because the MySQL package installer installs the MySQL
       contents into a version and platform specific directory, you
       can use this to upgrade and migrate your database between
       versions. You will need to either copy the data directory from
       the old version to the new version, or alternatively specify
       an alternative datadir value to set location of the data
       directory.

     * You might want to add aliases to your shell's resource file to
       make it easier to access commonly used programs such as mysql
       and mysqladmin from the command line. The syntax for bash is:
alias mysql=/usr/local/mysql/bin/mysql
alias mysqladmin=/usr/local/mysql/bin/mysqladmin
       For tcsh, use:
alias mysql /usr/local/mysql/bin/mysql
alias mysqladmin /usr/local/mysql/bin/mysqladmin
       Even better, add /usr/local/mysql/bin to your PATH environment
       variable. You can do this by modifying the appropriate startup
       file for your shell. For more information, see Section 4.2.1,
       "Invoking MySQL Programs."

     * After you have copied over the MySQL database files from the
       previous installation and have successfully started the new
       server, you should consider removing the old installation
       files to save disk space. Additionally, you should also remove
       older versions of the Package Receipt directories located in
       /Library/Receipts/mysql-VERSION.pkg.

2.8. Installing MySQL on Solaris

   To obtain a binary MySQL distribution for Solaris in tarball or
   PKG format, http://dev.mysql.com/downloads/mysql/5.1.html.

   If you install MySQL using a binary tarball distribution on
   Solaris, you may run into trouble even before you get the MySQL
   distribution unpacked, as the Solaris tar cannot handle long file
   names. This means that you may see errors when you try to unpack
   MySQL.

   If this occurs, you must use GNU tar (gtar) to unpack the
   distribution.

   You can install MySQL on Solaris using a binary package in PKG
   format instead of the binary tarball distribution. Before
   installing using the binary PKG format, you should create the
   mysql user and group, for example:
groupadd mysql
useradd -g mysql mysql

   Some basic PKG-handling commands follow:

     * To add a package:
pkgadd -d package_name.pkg

     * To remove a package:
pkgrm package_name

     * To get a full list of installed packages:
pkginfo

     * To get detailed information for a package:
pkginfo -l package_name

     * To list the files belonging to a package:
pkgchk -v package_name

     * To get packaging information for an arbitrary file:
pkgchk -l -p file_name

2.8.1. Solaris Notes

   For information about installing MySQL on Solaris using PKG
   distributions, see Section 2.8, "Installing MySQL on Solaris."

   On Solaris, you may run into trouble even before you get the MySQL
   distribution unpacked, as the Solaris tar cannot handle long file
   names. This means that you may see errors when you try to unpack
   MySQL.

   If this occurs, you must use GNU tar (gtar) to unpack the
   distribution.

   If you have an UltraSPARC system, you can get 4% better
   performance by adding -mcpu=v8 -Wa,-xarch=v8plusa to the CFLAGS
   and CXXFLAGS environment variables.

   If you have Sun's Forte 5.0 (or newer) compiler, you can run
   configure like this:
CC=cc CFLAGS="-Xa -fast -native -xstrconst -mt" \
CXX=CC CXXFLAGS="-noex -mt" \
./configure --prefix=/usr/local/mysql --enable-assembler

   To create a 64-bit binary with Sun's Forte compiler, use the
   following configuration options:
CC=cc CFLAGS="-Xa -fast -native -xstrconst -mt -xarch=v9" \
CXX=CC CXXFLAGS="-noex -mt -xarch=v9" ASFLAGS="-xarch=v9" \
./configure --prefix=/usr/local/mysql --enable-assembler

   To create a 64-bit Solaris binary using gcc, add -m64 to CFLAGS
   and CXXFLAGS and remove --enable-assembler from the configure
   line.

   In the MySQL benchmarks, we obtained a 4% speed increase on
   UltraSPARC when using Forte 5.0 in 32-bit mode, as compared to
   using gcc 3.2 with the -mcpu flag.

   If you create a 64-bit mysqld binary, it is 4% slower than the
   32-bit binary, but can handle more threads and memory.

   When using Solaris 10 for x86_64, you should mount any file
   systems on which you intend to store InnoDB files with the
   forcedirectio option. (By default mounting is done without this
   option.) Failing to do so will cause a significant drop in
   performance when using the InnoDB storage engine on this platform.

   If you get a problem with fdatasync or sched_yield, you can fix
   this by adding LIBS=-lrt to the configure line

   Solaris does not provide static versions of all system libraries
   (libpthreads and libdl), so you cannot compile MySQL with
   --static. If you try to do so, you get one of the following
   errors:
ld: fatal: library -ldl: not found
undefined reference to `dlopen'
cannot find -lrt

   If you link your own MySQL client programs, you may see the
   following error at runtime:
ld.so.1: fatal: libmysqlclient.so.#:
open failed: No such file or directory

   This problem can be avoided by one of the following methods:

     * Link clients with the -Wl,r/full/path/to/libmysqlclient.so
       flag rather than with -Lpath).

     * Copy libmysqclient.so to /usr/lib.

     * Add the path name of the directory where libmysqlclient.so is
       located to the LD_RUN_PATH environment variable before running
       your client.

   If you have problems with configure trying to link with -lz when
   you don't have zlib installed, you have two options:

     * If you want to be able to use the compressed communication
       protocol, you need to get and install zlib from ftp.gnu.org.

     * Run configure with the --with-named-z-libs=no option when
       building MySQL.

   If you are using gcc and have problems with loading user-defined
   functions (UDFs) into MySQL, try adding -lgcc to the link line for
   the UDF.

   If you would like MySQL to start automatically, you can copy
   support-files/mysql.server to /etc/init.d and create a symbolic
   link to it named /etc/rc3.d/S99mysql.server.

   If too many processes try to connect very rapidly to mysqld, you
   should see this error in the MySQL log:
Error in accept: Protocol error

   You might try starting the server with the --back_log=50 option as
   a workaround for this. (Use -O back_log=50 before MySQL 4.)

   To configure the generation of core files on Solaris you should
   use the coreadm command. Because of the security implications of
   generating a core on a setuid() application, by default, Solaris
   does not support core files on setuid() programs. However, you can
   modify this behavior using coreadm. If you enable setuid() core
   files for the current user, they will be generated using the mode
   600 and owned by the superuser.

2.9. Installing MySQL on i5/OS

   The i5/OS POWER MySQL package was created in cooperation with IBM.
   MySQL works within the Portable Application Solution Environment
   (PASE) on the System i series of hardware and will also provide
   database services for the Zend Core for i5/OS.

   MySQL for i5/OS is provided both as a tar file and as a save file
   (.savf) package that can be downloaded and installed directly
   without any additional installation steps required. To install
   MySQL using the tar file, see Section 2.2, "Installing MySQL from
   Generic Binaries on Unix/Linux."

   MySQL is only supported on i5/OS V5R4 or later releases. The i5/OS
   PASE must be installed for MySQL to operate. You must be able to
   login as a user in *SECOFR class.

   You should the installation notes and tips for i5/OS before
   starting installation. See i5/OS Installation Notes.

   Before Installation:

Note

   The installation package will use an existing configuration if you
   have previously installed MySQL (which is identified by looking
   for the file /etc/my.cnf). The values for the data directory
   (DATADIR) and owner of the MySQL files (USRPRF) specified during
   the installation will be ignored, and the values determined from
   the /etc/my.cnf will be used instead.

   If you want to change these parameters during a new install, you
   should temporarily rename /etc/my.cnf, install MySQL using the new
   parameters you want to use, and then merge your previous
   /etc/my.cnf configuration settings with the new /etc/my.cnf file
   that is created during installation.

     * You must have a user profile with PASE with suitable
       privileges. The user should be within the *SECOFR class, such
       as the QSECOFR user ID. You can use the WRKUSRPRF command to
       check your user profile.

     * For network connections to MySQL, you must have TCP/IP
       enabled. You should also check the following:

          + Ensure that a name has defined for the system. Run the
            Configure TCP/IP (CFGTCP) command and select option 12
            (Change TCP/IP domain information) to display this
            setting. Make sure that a value is listed in the Host
            name field.

          + Make sure that the system has a loopback entry which
            represents the localhost or 127.0.0.1.

          + Ensure that the IP address of the IBM i machine is mapped
            correctly to the host name.

   To install MySQL on i5/OS, follow these steps:

    1. On the System i machine, create a save file that will be used
       to receive the downloaded installation save file. The file
       should be located within the General Purpose Library (QGPL):
CRTSAVF FILE(QGPL/MYSQLINST) TESXT('MySQL Save file')

    2. Download the MySQL installation save file in 32-bit
       (mysql-5.1.39-i5os-power-32bit.savf) or 64-bit
       (mysql-5.1.39-i5os-power-64bit.savf) from MySQL Downloads
       (http://dev.mysql.com/downloads).

    3. You need to FTP the downloaded .savf file directly into the
       QGPL/MYSQLINST file on the System i server. You can do this
       through FTP using the following steps after logging in to the
       System i machine:
ftp> bin
ftp> cd qgpl
ftp> put mysql-5.1.39-i5os-power.savf mysqlinst

    4. Log into the System i server using a user in the *SECOFR
       class, such as the QSECOFR user ID.

    5. You need to restore the installation library stored in the
       .savf save file:
RSTLIB MYSQLINST DEV(*SAVF) SAVF(QGPL/MYSQLINST) MBROPT(*ALL) ALWOBJD
IF(*ALL)

Note
       You can ignore the security changes-type message at the bottom
       of the installation panel.

    6. Once you have finished restoring the MYSQLINST library, check
       that all the necessary objects for installation are on the
       system by using the Display Library (DSPLIB) command:
DSPLIB LIB(MYSQLINST)

    7. You need to execute the installation command,
       MYSQLINST/INSMYSQL. You can specify three parameter settings
       during installation:

          + DIR('/QOpenSys/usr/local/mysql') sets the installation
            location for the MySQL files. The directory will be
            created if it does not already exist.

          + DATADIR('/QOpenSys/usr/local/mysql/data') sets the
            location of the directory that will be used to store the
            database files and binary logs. The default setting is
            /QOpenSys/usr/local/mysql/data. Note that if the
            installer detects an existing installation (due to the
            existence of /etc/my.cnf), then the existing setting will
            be used instead of the default.

          + USRPRF(MYSQL) sets the user profile that will own the
            files that are installed. The profile will be created if
            it does not already exist.

Note
            You should choose an appropriate user for using the MySQL
            server installation. The user will be used whenever you
            need to do any administration on the MySQL server.
       Once you have set the appropriate parameters, you can begin
       the installation.
       The installation copies all the necessary files into a
       directory matching the DIR configuration value; sets the
       ownership on those files, sets up the MySQL environment and
       creates the MySQL configuration file (in /etc/my.cnf)
       completing all the steps in a typical binary installation
       process automatically. If this is a new installation of MySQL,
       or if the installer detects that this is a new version
       (because the /etc/my.cnf file does not exist), then the
       initial core MySQL databases will also be created during
       installation.
       Once the installation has been completed, you will get a
       notice advising you to set the password for the root user. For
       more information, Section 2.13, "Post-Installation Setup and
       Testing."

    8. Once the installation has completed, you can delete the
       installation file:
DLTLIB LIB(MYSQLINST)

   Upgrading an existing MySQL instance

   You need to execute the upgrade command, MYSQLINST/UPGMYSQL.

Note

   You cannot use MYSQLINST/UPGMYSQL to upgrade between major
   versions of MySQL (for example from 5.0 to 5.1). For information
   and advice on migrating between major versions you can use the
   advice provided in Section 2.4.1.1, "Upgrading from MySQL 5.0 to
   5.1."

   You must specify 6 parameters to perform an upgrade:

     * DIR('/QOpenSys/usr/local/') --- sets the installation location
       for the MySQL files. The directory will be created if it does
       not already exist. This is the directory that the MySQL server
       will be installed into, inside a directory with a name
       matching the version and release. For example, if installing
       MySQL 5.1.39 with the DIR set to /QOpenSys/usr/local/ would
       result in /QOpenSys/usr/local/mysql-5.1.39-i5os-power64 and a
       symbolic link to this directory will be created in
       /QOpenSys/usr/local/mysql.

     * DATADIR('/QOpenSys/mysql/data') --- sets the location of the
       directory that will be upgraded.

     * USRPRF('MYSQL') --- sets the user profile that will own the
       files that are installed. The profile will be created if it
       does not already exist; if it is created as part of the
       upgrade process, it will be disabled initially. You may wish
       to enable this user profile so that it can be used to start
       the MySQL server later. It is best practice to use the one
       previously created during the first installation.

     * MYSQLUSR('root user') --- any user account in the current
       MySQL server with SUPER privileges.

     * PASSWORD('root user password') --- the password for the above
       account. This is necessary as the upgrade starts the MySQL
       server to upgrade the tables and the password is need to be
       able to shutdown the MySQL server.

     * CURINST('path to previous install') --- the full path to the
       installation that is being upgraded. For example an
       installation in /QOpenSys/usr/local/ will be
       /QOpenSys/usr/local/msyql-5.1.30-i5os-power64. Failure to
       specify this option may result in corruption of your existing
       data files.

   For example:
MYSQLINST/UPGMYSQL DIR('/QOpenSys/usr/local/') DATADIR('/QOpenSys/mys
ql/data') »
     USERPRF(MYSQL) MYSQLUSR('root') PASSWORD('root') CURINST('/QOpen
Sys/usr/local/mysql-5.1.30-i5os-power64')

   You should receive a Program Message indicating UPGRADE
   SUCCESSFUL! upon completion or an error message if there is a
   problem.You can view the upgrade programs progression and the
   error in the text file upgrade.log in the installation directory.

   To start MySQL:

    1. Log into the System i server using the user profile create or
       specified during installation. By default, this is MYSQL.

Note
       You should start mysqld_safe using a user that in the PASE
       environment has the id=0 (the equivalent of the standard Unix
       root user). If you do not use a user with this ID then the
       system will be unable to change the user when executing mysqld
       as set using --user option. If this happens, mysqld may be
       unable to read the files located within the MySQL data
       directory and the execution will fail.

    2. Enter the PASE environment using call qp2term.

    3. Start the MySQL server by changing to the installation
       directory and running mysqld_safe, specifying the user name
       used to install the server. The installer conveniently
       installs a symbolic link to the installation directory
       (mysql-5.0.42-i5os-power-32bit) as /opt/mysql/mysql:
> cd /opt/mysql/mysql
> bin/mysqld_safe --user=mysql &
       You should see a message similar to the following:
Starting mysqld daemon with databases »
     from /opt/mysql/mysql-enterprise-5.0.42-i5os-power-32bit/data

   If you are having problems starting MySQL server, see Section
   2.13.1.3, "Starting and Troubleshooting the MySQL Server."

   To stop MySQL:

    1. Log into the System i server using the user profile create or
       specified during installation. By default, this is MYSQL.

    2. Enter the PASE environment using call qp2term.

    3. Stop the MySQL server by changing into the installation
       directory and running mysqladmin, specifying the user name
       used to install the server:
> cd /opt/mysql/mysql
> bin/mysqladmin -u root shutdown
       If the session that you started and stopped MySQL are the
       same, you may get the log output from mysqld:
   STOPPING server from pid file »
     /opt/mysql/mysql-enterprise-5.0.42-i5os-power-32bit/data/I5DBX.R
CHLAND.IBM.COM.pid
   070718 10:34:20  mysqld ended
       If the sessions used to start and stop MySQL are different,
       you will not receive any confirmation of the shutdown.

   Note and tips

     * A problem has been identified with the installation process on
       DBCS systems. If you are having problems install MySQL on a
       DBCS system, you need to change your job's coded character set
       identifier (CSSID) to 37 (EBCDIC) before executing the install
       command, INSMYSQL. To do this, determine your existing CSSID
       (using DSPJOB and selecting option 2), execute CHGJOB
       CSSID(37), run INSMYSQL to install MySQL and then execute
       CHGJOB again with your original CSSID.

     * If you want to use the Perl scripts that are included with
       MySQL, you need to download the iSeries Tools for Developers
       (5799-PTL). See
       http://www-03.ibm.com/servers/enable/site/porting/tools/.

2.10. Installing MySQL on FreeBSD

   This section provides information about using MySQL on variants of
   FreeBSD Unix.

   The easiest (and preferred) way to install MySQL is to use the
   mysql-server and mysql-client ports available at
   http://www.freebsd.org/. Using these ports gives you the following
   benefits:

     * A working MySQL with all optimizations enabled that are known
       to work on your version of FreeBSD.

     * Automatic configuration and build.

     * Startup scripts installed in /usr/local/etc/rc.d.

     * The ability to use pkg_info -L to see which files are
       installed.

     * The ability to use pkg_delete to remove MySQL if you no longer
       want it on your machine.

   The MySQL build process requires GNU make (gmake) to work. If GNU
   make is not available, you must install it first before compiling
   MySQL.

   The recommended way to compile and install MySQL on FreeBSD with
   gcc (2.95.2 and up) is:
CC=gcc CFLAGS="-O2 -fno-strength-reduce" \
    CXX=gcc CXXFLAGS="-O2 -fno-rtti -fno-exceptions \
    -felide-constructors -fno-strength-reduce" \
    ./configure --prefix=/usr/local/mysql --enable-assembler
gmake
gmake install
cd /usr/local/mysql
bin/mysql_install_db --user=mysql
bin/mysqld_safe &

   FreeBSD is known to have a very low default file handle limit. See
   Section B.5.2.18, "'File' Not Found and Similar Errors." Start the
   server by using the --open-files-limit option for mysqld_safe, or
   raise the limits for the mysqld user in /etc/login.conf and
   rebuild it with cap_mkdb /etc/login.conf. Also be sure that you
   set the appropriate class for this user in the password file if
   you are not using the default (use chpass mysqld-user-name). See
   Section 4.3.2, "mysqld_safe --- MySQL Server Startup Script."

   In current versions of FreeBSD (at least 4.x and greater), you may
   increase the limit on the amount of memory available for a process
   by adding the following entries to the /boot/loader.conf file and
   rebooting the machine (these are not settings that can be changed
   at run time with the sysctl command):
kern.maxdsiz="1073741824" # 1GB
kern.dfldsiz="1073741824" # 1GB
kern.maxssiz="134217728" # 128MB

   For older versions of FreeBSD, you must recompile your kernel to
   change the maximum data segment size for a process. In this case,
   you should look at the MAXDSIZ option in the LINT config file for
   more information.

   If you get problems with the current date in MySQL, setting the TZ
   variable should help. See Section 2.14, "Environment Variables."

2.11. Installing MySQL on HP-UX

   If you install MySQL using a binary tarball distribution on HP-UX,
   you may run into trouble even before you get the MySQL
   distribution unpacked, as the HP-UX tar cannot handle long file
   names. This means that you may see errors when you try to unpack
   MySQL.

   If this occurs, you must use GNU tar (gtar) to unpack the
   distribution.

   Because of some critical bugs in the standard HP-UX libraries, you
   should install the following patches before trying to run MySQL on
   HP-UX 11.0:
PHKL_22840 Streams cumulative
PHNE_22397 ARPA cumulative

   This solves the problem of getting EWOULDBLOCK from recv() and
   EBADF from accept() in threaded applications.

   If you are using gcc 2.95.1 on an unpatched HP-UX 11.x system, you
   may get the following error:
In file included from /usr/include/unistd.h:11,
                 from ../include/global.h:125,
                 from mysql_priv.h:15,
                 from item.cc:19:
/usr/include/sys/unistd.h:184: declaration of C function ...
/usr/include/sys/pthread.h:440: previous declaration ...
In file included from item.h:306,
                 from mysql_priv.h:158,
                 from item.cc:19:

   The problem is that HP-UX does not define pthreads_atfork()
   consistently. It has conflicting prototypes in
   /usr/include/sys/unistd.h:184 and /usr/include/sys/pthread.h:440.

   One solution is to copy /usr/include/sys/unistd.h into
   mysql/include and edit unistd.h and change it to match the
   definition in pthread.h. Look for this line:
extern int pthread_atfork(void (*prepare)(), void (*parent)(),
                                          void (*child)());

   Change it to look like this:
extern int pthread_atfork(void (*prepare)(void), void (*parent)(void)
,
                                          void (*child)(void));

   After making the change, the following configure line should work:
CFLAGS="-fomit-frame-pointer -O3 -fpic" CXX=gcc \
CXXFLAGS="-felide-constructors -fno-exceptions -fno-rtti -O3" \
./configure --prefix=/usr/local/mysql --disable-shared

   If you are using HP-UX compiler, you can use the following command
   (which has been tested with cc B.11.11.04):
CC=cc CXX=aCC CFLAGS=+DD64 CXXFLAGS=+DD64 ./configure \
    --with-extra-character-set=complex

   You can ignore any errors of the following type:
aCC: warning 901: unknown option: `-3': use +help for online
documentation

   If you get the following error from configure, verify that you
   don't have the path to the K&R compiler before the path to the
   HP-UX C and C++ compiler:
checking for cc option to accept ANSI C... no
configure: error: MySQL requires an ANSI C compiler (and a C++ compil
er).
Try gcc. See the Installation chapter in the Reference Manual.

   Another reason for not being able to compile is that you didn't
   define the +DD64 flags as just described.

   Another possibility for HP-UX 11 is to use the MySQL binaries
   provided at http://dev.mysql.com/downloads/, which we have built
   and tested ourselves. We have also received reports that the HP-UX
   10.20 binaries supplied by MySQL can be run successfully on HP-UX
   11. If you encounter problems, you should be sure to check your
   HP-UX patch level.

2.12. Installing MySQL on AIX

   Automatic detection of xlC is missing from Autoconf, so a number
   of variables need to be set before running configure. The
   following example uses the IBM compiler:
export CC="xlc_r -ma -O3 -qstrict -qoptimize=3 -qmaxmem=8192 "
export CXX="xlC_r -ma -O3 -qstrict -qoptimize=3 -qmaxmem=8192"
export CFLAGS="-I /usr/local/include"
export LDFLAGS="-L /usr/local/lib"
export CPPFLAGS=$CFLAGS
export CXXFLAGS=$CFLAGS

./configure --prefix=/usr/local \
                --localstatedir=/var/mysql \
                --sbindir='/usr/local/bin' \
                --libexecdir='/usr/local/bin' \
                --enable-thread-safe-client \
                --enable-large-files

   The preceding options are used to compile the MySQL distribution
   that can be found at http://www-frec.bull.com/.

   If you change the -O3 to -O2 in the preceding configure line, you
   must also remove the -qstrict option. This is a limitation in the
   IBM C compiler.

   If you are using gcc to compile MySQL, you must use the
   -fno-exceptions flag, because the exception handling in gcc is not
   thread-safe! There are also some known problems with IBM's
   assembler that may cause it to generate bad code when used with
   gcc.

   Use the following configure line with gcc 2.95 on AIX:
CC="gcc -pipe -mcpu=power -Wa,-many" \
CXX="gcc -pipe -mcpu=power -Wa,-many" \
CXXFLAGS="-felide-constructors -fno-exceptions -fno-rtti" \
./configure --prefix=/usr/local/mysql --with-low-memory

   The -Wa,-many option is necessary for the compile to be
   successful. IBM is aware of this problem but is in no hurry to fix
   it because of the workaround that is available. We don't know if
   the -fno-exceptions is required with gcc 2.95, but because MySQL
   doesn't use exceptions and the option generates faster code, you
   should always use it with gcc.

   If you get a problem with assembler code, try changing the
   -mcpu=xxx option to match your CPU. Typically power2, power, or
   powerpc may need to be used. Alternatively, you might need to use
   604 or 604e. We are not positive but suspect that power would
   likely be safe most of the time, even on a power2 machine.

   If you don't know what your CPU is, execute a uname -m command. It
   produces a string that looks like 000514676700, with a format of
   xxyyyyyymmss where xx and ss are always 00, yyyyyy is a unique
   system ID and mm is the ID of the CPU Planar. A chart of these
   values can be found at
   http://www16.boulder.ibm.com/pseries/en_US/cmds/aixcmds5/uname.htm
   .

   This gives you a machine type and a machine model you can use to
   determine what type of CPU you have.

   If you have problems with threads on AIX 5.3, you should upgrade
   AIX 5.3 to technology level 7 (5300-07).

   If you have problems with signals (MySQL dies unexpectedly under
   high load), you may have found an OS bug with threads and signals.
   In this case, you can tell MySQL not to use signals by configuring
   as follows:
CFLAGS=-DDONT_USE_THR_ALARM CXX=gcc \
CXXFLAGS="-felide-constructors -fno-exceptions -fno-rtti \
-DDONT_USE_THR_ALARM" \
./configure --prefix=/usr/local/mysql --with-debug \
    --with-low-memory

   This doesn't affect the performance of MySQL, but has the side
   effect that you can't kill clients that are "sleeping" on a
   connection with mysqladmin kill or mysqladmin shutdown. Instead,
   the client dies when it issues its next command.

   On some versions of AIX, linking with libbind.a makes
   getservbyname() dump core. This is an AIX bug and should be
   reported to IBM.

   For AIX 4.2.1 and gcc, you have to make the following changes.

   After configuring, edit config.h and include/my_config.h and
   change the line that says this:
#define HAVE_SNPRINTF 1

   to this:
#undef HAVE_SNPRINTF

   And finally, in mysqld.cc, you need to add a prototype for
   initgroups().
#ifdef _AIX41
extern "C" int initgroups(const char *,int);
#endif

   For 32-bit binaries, if you need to allocate a lot of memory to
   the mysqld process, it is not enough to just use ulimit -d
   unlimited. You may also have to modify mysqld_safe to add a line
   something like this:
export LDR_CNTRL='MAXDATA=0x80000000'

   You can find more information about using a lot of memory at
   http://publib16.boulder.ibm.com/pseries/en_US/aixprggd/genprogc/lr
   g_prg_support.htm.

   Users of AIX 4.3 should use gmake instead of the make utility
   included with AIX.

   As of AIX 4.1, the C compiler has been unbundled from AIX as a
   separate product. gcc 3.3.2 can be obtained here:
   ftp://ftp.software.ibm.com/aix/freeSoftware/aixtoolbox/RPMS/ppc/gc
   c/

   The steps for compiling MySQL on AIX with gcc 3.3.2 are similar to
   those for using gcc 2.95 (in particular, the need to edit config.h
   and my_config.h after running configure). However, before running
   configure, you should also patch the curses.h file as follows:
/opt/freeware/lib/gcc-lib/powerpc-ibm-aix5.2.0.0/3.3.2/include/curses
.h.ORIG
       Mon Dec 26 02:17:28 2005
--- /opt/freeware/lib/gcc-lib/powerpc-ibm-aix5.2.0.0/3.3.2/include/cu
rses.h
Mon Dec 26 02:40:13 2005
***************
*** 2023,2029 ****


  #endif /* _AIX32_CURSES */
! #if defined(__USE_FIXED_PROTOTYPES__) || defined(__cplusplus) || de
fined
(__STRICT_ANSI__)
  extern int delwin (WINDOW *);
  extern int endwin (void);
  extern int getcurx (WINDOW *);
--- 2023,2029 ----


  #endif /* _AIX32_CURSES */
! #if 0 && (defined(__USE_FIXED_PROTOTYPES__) || defined(__cplusplus)
|| defined
(__STRICT_ANSI__))
  extern int delwin (WINDOW *);
  extern int endwin (void);
  extern int getcurx (WINDOW *);

2.13. Post-Installation Setup and Testing

   After installing MySQL, there are some issues that you should
   address. For example, on Unix, you should initialize the data
   directory and create the MySQL grant tables. On all platforms, an
   important security concern is that the initial accounts in the
   grant tables have no passwords. You should assign passwords to
   prevent unauthorized access to the MySQL server. Optionally, you
   can create time zone tables to enable recognition of named time
   zones.

   The following sections include post-installation procedures that
   are specific to Windows systems and to Unix systems. Another
   section, Section 2.13.1.3, "Starting and Troubleshooting the MySQL
   Server," applies to all platforms; it describes what to do if you
   have trouble getting the server to start. Section 2.13.2,
   "Securing the Initial MySQL Accounts," also applies to all
   platforms. You should follow its instructions to make sure that
   you have properly protected your MySQL accounts by assigning
   passwords to them.

   When you are ready to create additional user accounts, you can
   find information on the MySQL access control system and account
   management in Section 5.4, "The MySQL Access Privilege System,"
   and Section 5.5, "MySQL User Account Management."

2.13.1. Unix Post-Installation Procedures

   After installing MySQL on Unix, you need to initialize the grant
   tables, start the server, and make sure that the server works
   satisfactorily. You may also wish to arrange for the server to be
   started and stopped automatically when your system starts and
   stops. You should also assign passwords to the accounts in the
   grant tables.

   On Unix, the grant tables are set up by the mysql_install_db
   program. For some installation methods, this program is run for
   you automatically:

     * If you install MySQL on Linux using RPM distributions, the
       server RPM runs mysql_install_db.

     * If you install MySQL on Mac OS X using a PKG distribution, the
       installer runs mysql_install_db.

   Otherwise, you'll need to run mysql_install_db yourself.

   The following procedure describes how to initialize the grant
   tables (if that has not previously been done) and then start the
   server. It also suggests some commands that you can use to test
   whether the server is accessible and working properly. For
   information about starting and stopping the server automatically,
   see Section 2.13.1.2, "Starting and Stopping MySQL Automatically."

   After you complete the procedure and have the server running, you
   should assign passwords to the accounts created by
   mysql_install_db. Instructions for doing so are given in Section
   2.13.2, "Securing the Initial MySQL Accounts."

   In the examples shown here, the server runs under the user ID of
   the mysql login account. This assumes that such an account exists.
   Either create the account if it does not exist, or substitute the
   name of a different existing login account that you plan to use
   for running the server.

    1. Change location into the top-level directory of your MySQL
       installation, represented here by BASEDIR:
shell> cd BASEDIR
       BASEDIR is likely to be something like /usr/local/mysql or
       /usr/local. The following steps assume that you are located in
       this directory.

    2. If necessary, run the mysql_install_db program to set up the
       initial MySQL grant tables containing the privileges that
       determine how users are allowed to connect to the server.
       You'll need to do this if you used a distribution type for
       which the installation procedure doesn't run the program for
       you.
       Typically, mysql_install_db needs to be run only the first
       time you install MySQL, so you can skip this step if you are
       upgrading an existing installation, However, mysql_install_db
       does not overwrite any existing privilege tables, so it should
       be safe to run in any circumstances.
       To initialize the grant tables, use one of the following
       commands, depending on whether mysql_install_db is located in
       the bin or scripts directory:
shell> bin/mysql_install_db --user=mysql
shell> scripts/mysql_install_db --user=mysql
       It might be necessary to specify other options such as
       --basedir or --datadir if mysql_install_db does not use the
       correct locations for the installation directory or data
       directory. For example:
shell> bin/mysql_install_db --user=mysql \
         --basedir=/opt/mysql/mysql \
         --datadir=/opt/mysql/mysql/data
       The mysql_install_db script creates the server's data
       directory. Under the data directory, it creates directories
       for the mysql database that holds all database privileges and
       the test database that you can use to test MySQL. The script
       also creates privilege table entries for root and
       anonymous-user accounts. The accounts have no passwords
       initially. A description of their initial privileges is given
       in Section 2.13.2, "Securing the Initial MySQL Accounts."
       Briefly, these privileges allow the MySQL root user to do
       anything, and allow anybody to create or use databases with a
       name of test or starting with test_.
       It is important to make sure that the database directories and
       files are owned by the mysql login account so that the server
       has read and write access to them when you run it later. To
       ensure this, the --user option should be used as shown if you
       run mysql_install_db as root. Otherwise, you should execute
       the script while logged in as mysql, in which case you can
       omit the --user option from the command.
       mysql_install_db creates several tables in the mysql database,
       including user, db, host, tables_priv, columns_priv, func, and
       others. See Section 5.4, "The MySQL Access Privilege System,"
       for a complete listing and description of these tables.
       If you don't want to have the test database, you can remove it
       with mysqladmin -u root drop test after starting the server.
       If you have trouble with mysql_install_db at this point, see
       Section 2.13.1.1, "Problems Running mysql_install_db."

    3. Start the MySQL server:
shell> bin/mysqld_safe --user=mysql &
       It is important that the MySQL server be run using an
       unprivileged (non-root) login account. To ensure this, the
       --user option should be used as shown if you run mysqld_safe
       as system root. Otherwise, you should execute the script while
       logged in to the system as mysql, in which case you can omit
       the --user option from the command.
       Further instructions for running MySQL as an unprivileged user
       are given in Section 5.3.6, "How to Run MySQL as a Normal
       User."
       If you neglected to create the grant tables before proceeding
       to this step, the following message appears in the error log
       file when you start the server:
mysqld: Can't find file: 'host.frm'
       If you have other problems starting the server, see Section
       2.13.1.3, "Starting and Troubleshooting the MySQL Server."

    4. Use mysqladmin to verify that the server is running. The
       following commands provide simple tests to check whether the
       server is up and responding to connections:
shell> bin/mysqladmin version
shell> bin/mysqladmin variables
       The output from mysqladmin version varies slightly depending
       on your platform and version of MySQL, but should be similar
       to that shown here:
shell> bin/mysqladmin version
mysqladmin  Ver 14.12 Distrib 5.1.46, for pc-linux-gnu on i686
...

Server version          5.1.46
Protocol version        10
Connection              Localhost via UNIX socket
UNIX socket             /var/lib/mysql/mysql.sock
Uptime:                 14 days 5 hours 5 min 21 sec

Threads: 1  Questions: 366  Slow queries: 0
Opens: 0  Flush tables: 1  Open tables: 19
Queries per second avg: 0.000
       To see what else you can do with mysqladmin, invoke it with
       the --help option.

    5. Verify that you can shut down the server:
shell> bin/mysqladmin -u root shutdown

    6. Verify that you can start the server again. Do this by using
       mysqld_safe or by invoking mysqld directly. For example:
shell> bin/mysqld_safe --user=mysql --log &
       If mysqld_safe fails, see Section 2.13.1.3, "Starting and
       Troubleshooting the MySQL Server."

    7. Run some simple tests to verify that you can retrieve
       information from the server. The output should be similar to
       what is shown here:
shell> bin/mysqlshow
+-----------+
| Databases |
+-----------+
| mysql     |
| test      |
+-----------+

shell> bin/mysqlshow mysql
Database: mysql
+---------------------------+
|          Tables           |
+---------------------------+
| columns_priv              |
| db                        |
| func                      |
| help_category             |
| help_keyword              |
| help_relation             |
| help_topic                |
| host                      |
| proc                      |
| procs_priv                |
| tables_priv               |
| time_zone                 |
| time_zone_leap_second     |
| time_zone_name            |
| time_zone_transition      |
| time_zone_transition_type |
| user                      |
+---------------------------+

shell> bin/mysql -e "SELECT Host,Db,User FROM db" mysql
+------+--------+------+
| host | db     | user |
+------+--------+------+
| %    | test   |      |
| %    | test_% |      |
+------+--------+------+

    8. There is a benchmark suite in the sql-bench directory (under
       the MySQL installation directory) that you can use to compare
       how MySQL performs on different platforms. The benchmark suite
       is written in Perl. It requires the Perl DBI module that
       provides a database-independent interface to the various
       databases, and some other additional Perl modules:
DBI
DBD::mysql
Data::Dumper
Data::ShowTable
       These modules can be obtained from CPAN
       (http://www.cpan.org/). See also Section 2.15.1, "Installing
       Perl on Unix."
       The sql-bench/Results directory contains the results from many
       runs against different databases and platforms. To run all
       tests, execute these commands:
shell> cd sql-bench
shell> perl run-all-tests
       If you don't have the sql-bench directory, you probably
       installed MySQL using RPM files other than the source RPM.
       (The source RPM includes the sql-bench benchmark directory.)
       In this case, you must first install the benchmark suite
       before you can use it. There are separate benchmark RPM files
       named mysql-bench-VERSION.i386.rpm that contain benchmark code
       and data.
       If you have a source distribution, there are also tests in its
       tests subdirectory that you can run. For example, to run
       auto_increment.tst, execute this command from the top-level
       directory of your source distribution:
shell> mysql -vvf test < ./tests/auto_increment.tst
       The expected result of the test can be found in the
       ./tests/auto_increment.res file.

    9. At this point, you should have the server running. However,
       none of the initial MySQL accounts have a password, so you
       should assign passwords using the instructions found in
       Section 2.13.2, "Securing the Initial MySQL Accounts."

   The MySQL 5.1 installation procedure creates time zone tables in
   the mysql database. However, you must populate the tables manually
   using the instructions in Section 9.6, "MySQL Server Time Zone
   Support."

2.13.1.1. Problems Running mysql_install_db

   The purpose of the mysql_install_db script is to generate new
   MySQL privilege tables. It does not overwrite existing MySQL
   privilege tables, and it does not affect any other data.

   If you want to re-create your privilege tables, first stop the
   mysqld server if it is running. Then rename the mysql directory
   under the data directory to save it, and then run
   mysql_install_db. Suppose that your current directory is the MySQL
   installation directory and that mysql_install_db is located in the
   bin directory and the data directory is named data. To rename the
   mysql database and re-run mysql_install_db, use these commands.
shell> mv data/mysql data/mysql.old
shell> bin/mysql_install_db --user=mysql

   When you run mysql_install_db, you might encounter the following
   problems:

     * mysql_install_db fails to install the grant tables
       You may find that mysql_install_db fails to install the grant
       tables and terminates after displaying the following messages:
Starting mysqld daemon with databases from XXXXXX
mysqld ended
       In this case, you should examine the error log file very
       carefully. The log should be located in the directory XXXXXX
       named by the error message and should indicate why mysqld
       didn't start. If you do not understand what happened, include
       the log when you post a bug report. See Section 1.7, "How to
       Report Bugs or Problems."

     * There is a mysqld process running
       This indicates that the server is running, in which case the
       grant tables have probably been created already. If so, there
       is no need to run mysql_install_db at all because it needs to
       be run only once (when you install MySQL the first time).

     * Installing a second mysqld server does not work when one
       server is running
       This can happen when you have an existing MySQL installation,
       but want to put a new installation in a different location.
       For example, you might have a production installation, but you
       want to create a second installation for testing purposes.
       Generally the problem that occurs when you try to run a second
       server is that it tries to use a network interface that is in
       use by the first server. In this case, you should see one of
       the following error messages:
Can't start server: Bind on TCP/IP port:
Address already in use
Can't start server: Bind on unix socket...
       For instructions on setting up multiple servers, see Section
       5.6, "Running Multiple MySQL Servers on the Same Machine."

     * You do not have write access to the /tmp directory
       If you do not have write access to create temporary files or a
       Unix socket file in the default location (the /tmp directory),
       an error occurs when you run mysql_install_db or the mysqld
       server.
       You can specify different locations for the temporary
       directory and Unix socket file by executing these commands
       prior to starting mysql_install_db or mysqld, where
       some_tmp_dir is the full path name to some directory for which
       you have write permission:
shell> TMPDIR=/some_tmp_dir/
shell> MYSQL_UNIX_PORT=/some_tmp_dir/mysql.sock
shell> export TMPDIR MYSQL_UNIX_PORT
       Then you should be able to run mysql_install_db and start the
       server with these commands:
shell> bin/mysql_install_db --user=mysql
shell> bin/mysqld_safe --user=mysql &
       If mysql_install_db is located in the scripts directory,
       modify the first command to scripts/mysql_install_db.
       See Section B.5.4.5, "How to Protect or Change the MySQL Unix
       Socket File," and Section 2.14, "Environment Variables."

   There are some alternatives to running the mysql_install_db script
   provided in the MySQL distribution:

     * If you want the initial privileges to be different from the
       standard defaults, you can modify mysql_install_db before you
       run it. However, it is preferable to use GRANT and REVOKE to
       change the privileges after the grant tables have been set up.
       In other words, you can run mysql_install_db, and then use
       mysql -u root mysql to connect to the server as the MySQL root
       user so that you can issue the necessary GRANT and REVOKE
       statements.
       If you want to install MySQL on several machines with the same
       privileges, you can put the GRANT and REVOKE statements in a
       file and execute the file as a script using mysql after
       running mysql_install_db. For example:
shell> bin/mysql_install_db --user=mysql
shell> bin/mysql -u root < your_script_file
       By doing this, you can avoid having to issue the statements
       manually on each machine.

     * It is possible to re-create the grant tables completely after
       they have previously been created. You might want to do this
       if you're just learning how to use GRANT and REVOKE and have
       made so many modifications after running mysql_install_db that
       you want to wipe out the tables and start over.
       To re-create the grant tables, remove all the .frm, .MYI, and
       .MYD files in the mysql database directory. Then run the
       mysql_install_db script again.

     * You can start mysqld manually using the --skip-grant-tables
       option and add the privilege information yourself using mysql:
shell> bin/mysqld_safe --user=mysql --skip-grant-tables &
shell> bin/mysql mysql
       From mysql, manually execute the SQL commands contained in
       mysql_install_db. Make sure that you run mysqladmin
       flush-privileges or mysqladmin reload afterward to tell the
       server to reload the grant tables.
       Note that by not using mysql_install_db, you not only have to
       populate the grant tables manually, you also have to create
       them first.

2.13.1.2. Starting and Stopping MySQL Automatically

   Generally, you start the mysqld server in one of these ways:

     * Invoke mysqld directly. This works on any platform.

     * Run the MySQL server as a Windows service. The service can be
       set to start the server automatically when Windows starts, or
       as a manual service that you start on request. For
       instructions, see Section 2.5.5.6, "Starting MySQL as a
       Windows Service."

     * Invoke mysqld_safe, which tries to determine the proper
       options for mysqld and then runs it with those options. This
       script is used on Unix and Unix-like systems. See Section
       4.3.2, "mysqld_safe --- MySQL Server Startup Script."

     * Invoke mysql.server. This script is used primarily at system
       startup and shutdown on systems that use System V-style run
       directories, where it usually is installed under the name
       mysql. The mysql.server script starts the server by invoking
       mysqld_safe. See Section 4.3.3, "mysql.server --- MySQL Server
       Startup Script."

     * On Mac OS X, install a separate MySQL Startup Item package to
       enable the automatic startup of MySQL on system startup. The
       Startup Item starts the server by invoking mysql.server. See
       Section 2.7, "Installing MySQL on Mac OS X," for details.

   The mysqld_safe and mysql.server scripts and the Mac OS X Startup
   Item can be used to start the server manually, or automatically at
   system startup time. mysql.server and the Startup Item also can be
   used to stop the server.

   To start or stop the server manually using the mysql.server
   script, invoke it with start or stop arguments:
shell> mysql.server start
shell> mysql.server stop

   Before mysql.server starts the server, it changes location to the
   MySQL installation directory, and then invokes mysqld_safe. If you
   want the server to run as some specific user, add an appropriate
   user option to the [mysqld] group of the /etc/my.cnf option file,
   as shown later in this section. (It is possible that you will need
   to edit mysql.server if you've installed a binary distribution of
   MySQL in a nonstandard location. Modify it to change location into
   the proper directory before it runs mysqld_safe. If you do this,
   your modified version of mysql.server may be overwritten if you
   upgrade MySQL in the future, so you should make a copy of your
   edited version that you can reinstall.)

   mysql.server stop stops the server by sending a signal to it. You
   can also stop the server manually by executing mysqladmin
   shutdown.

   To start and stop MySQL automatically on your server, you need to
   add start and stop commands to the appropriate places in your
   /etc/rc* files.

   If you use the Linux server RPM package
   (MySQL-server-VERSION.rpm), the mysql.server script is installed
   in the /etc/init.d directory with the name mysql. You need not
   install it manually. See Section 2.6.1, "Installing MySQL from RPM
   Packages on Linux," for more information on the Linux RPM
   packages.

   Some vendors provide RPM packages that install a startup script
   under a different name such as mysqld.

   If you install MySQL from a source distribution or using a binary
   distribution format that does not install mysql.server
   automatically, you can install it manually. The script can be
   found in the support-files directory under the MySQL installation
   directory or in a MySQL source tree.

   To install mysql.server manually, copy it to the /etc/init.d
   directory with the name mysql, and then make it executable. Do
   this by changing location into the appropriate directory where
   mysql.server is located and executing these commands:
shell> cp mysql.server /etc/init.d/mysql
shell> chmod +x /etc/init.d/mysql

   Older Red Hat systems use the /etc/rc.d/init.d directory rather
   than /etc/init.d. Adjust the preceding commands accordingly.
   Alternatively, first create /etc/init.d as a symbolic link that
   points to /etc/rc.d/init.d:
shell> cd /etc
shell> ln -s rc.d/init.d .

   After installing the script, the commands needed to activate it to
   run at system startup depend on your operating system. On Linux,
   you can use chkconfig:
shell> chkconfig --add mysql

   On some Linux systems, the following command also seems to be
   necessary to fully enable the mysql script:
shell> chkconfig --level 345 mysql on

   On FreeBSD, startup scripts generally should go in
   /usr/local/etc/rc.d/. The rc(8) manual page states that scripts in
   this directory are executed only if their basename matches the
   *.sh shell file name pattern. Any other files or directories
   present within the directory are silently ignored. In other words,
   on FreeBSD, you should install the mysql.server script as
   /usr/local/etc/rc.d/mysql.server.sh to enable automatic startup.

   As an alternative to the preceding setup, some operating systems
   also use /etc/rc.local or /etc/init.d/boot.local to start
   additional services on startup. To start up MySQL using this
   method, you could append a command like the one following to the
   appropriate startup file:
/bin/sh -c 'cd /usr/local/mysql; ./bin/mysqld_safe --user=mysql &'

   For other systems, consult your operating system documentation to
   see how to install startup scripts.

   You can add options for mysql.server in a global /etc/my.cnf file.
   A typical /etc/my.cnf file might look like this:
[mysqld]
datadir=/usr/local/mysql/var
socket=/var/tmp/mysql.sock
port=3306
user=mysql

[mysql.server]
basedir=/usr/local/mysql

   The mysql.server script supports the following options: basedir,
   datadir, and pid-file. If specified, they must be placed in an
   option file, not on the command line. mysql.server supports only
   start and stop as command-line arguments.

   The following table shows which option groups the server and each
   startup script read from option files.
   Script       Option Groups
   mysqld       [mysqld], [server], [mysqld-major_version]
   mysqld_safe  [mysqld], [server], [mysqld_safe]
   mysql.server [mysqld], [mysql.server], [server]

   [mysqld-major_version] means that groups with names like
   [mysqld-5.0] and [mysqld-5.1] are read by servers having versions
   5.0.x, 5.1.x, and so forth. This feature can be used to specify
   options that can be read only by servers within a given release
   series.

   For backward compatibility, mysql.server also reads the
   [mysql_server] group and mysqld_safe also reads the [safe_mysqld]
   group. However, you should update your option files to use the
   [mysql.server] and [mysqld_safe] groups instead when using MySQL
   5.1.

   See Section 4.2.3.3, "Using Option Files."

2.13.1.3. Starting and Troubleshooting the MySQL Server

   This section provides troubleshooting suggestions for problems
   starting the server on Unix. If you are using Windows, see Section
   2.5.6, "Troubleshooting a MySQL Installation Under Windows."

   If you have problems starting the server, here are some things to
   try:

     * Check the error log to see why the server does not start.

     * Specify any special options needed by the storage engines you
       are using.

     * Make sure that the server knows where to find the data
       directory.

     * Make sure that the server can access the data directory. The
       ownership and permissions of the data directory and its
       contents must be set such that the server can read and modify
       them.

     * Verify that the network interfaces the server wants to use are
       available.

   Some storage engines have options that control their behavior. You
   can create a my.cnf file and specify startup options for the
   engines that you plan to use. If you are going to use storage
   engines that support transactional tables (InnoDB, NDB), be sure
   that you have them configured the way you want before starting the
   server:

     * If you are using InnoDB tables, see Section 13.6.2, "InnoDB
       Configuration."

     * If you are using MySQL Cluster, see Section 17.3, "MySQL
       Cluster Configuration."

   MySQL Enterprise For expert advice on start-up options appropriate
   to your circumstances, subscribe to The MySQL Enterprise Monitor.
   For more information, see
   http://www.mysql.com/products/enterprise/advisors.html.

   Storage engines will use default option values if you specify
   none, but it is recommended that you review the available options
   and specify explicit values for those for which the defaults are
   not appropriate for your installation.

   When the mysqld server starts, it changes location to the data
   directory. This is where it expects to find databases and where it
   expects to write log files. The server also writes the pid
   (process ID) file in the data directory.

   The data directory location is hardwired in when the server is
   compiled. This is where the server looks for the data directory by
   default. If the data directory is located somewhere else on your
   system, the server will not work properly. You can determine what
   the default path settings are by invoking mysqld with the
   --verbose and --help options.

   If the default locations don't match the MySQL installation layout
   on your system, you can override them by specifying options to
   mysqld or mysqld_safe on the command line or in an option file.

   To specify the location of the data directory explicitly, use the
   --datadir option. However, normally you can tell mysqld the
   location of the base directory under which MySQL is installed and
   it looks for the data directory there. You can do this with the
   --basedir option.

   To check the effect of specifying path options, invoke mysqld with
   those options followed by the --verbose and --help options. For
   example, if you change location into the directory where mysqld is
   installed and then run the following command, it shows the effect
   of starting the server with a base directory of /usr/local:
shell> ./mysqld --basedir=/usr/local --verbose --help

   You can specify other options such as --datadir as well, but
   --verbose and --help must be the last options.

   Once you determine the path settings you want, start the server
   without --verbose and --help.

   If mysqld is currently running, you can find out what path
   settings it is using by executing this command:
shell> mysqladmin variables

   Or:
shell> mysqladmin -h host_name variables

   host_name is the name of the MySQL server host.

   If you get Errcode 13 (which means Permission denied) when
   starting mysqld, this means that the privileges of the data
   directory or its contents do not allow the server access. In this
   case, you change the permissions for the involved files and
   directories so that the server has the right to use them. You can
   also start the server as root, but this raises security issues and
   should be avoided.

   On Unix, change location into the data directory and check the
   ownership of the data directory and its contents to make sure the
   server has access. For example, if the data directory is
   /usr/local/mysql/var, use this command:
shell> ls -la /usr/local/mysql/var

   If the data directory or its files or subdirectories are not owned
   by the login account that you use for running the server, change
   their ownership to that account. If the account is named mysql,
   use these commands:
shell> chown -R mysql /usr/local/mysql/var
shell> chgrp -R mysql /usr/local/mysql/var

   If it possible that even with correct ownership, MySQL may fail to
   start up if there is other security software running on your
   system that manages application access to various parts of the
   file system. In this case, you may need to reconfigure that
   software to enable mysqld to access the directories it uses during
   normal operation.

   If the server fails to start up correctly, check the error log.
   Log files are located in the data directory (typically C:\Program
   Files\MySQL\MySQL Server 5.1\data on Windows,
   /usr/local/mysql/data for a Unix binary distribution, and
   /usr/local/var for a Unix source distribution). Look in the data
   directory for files with names of the form host_name.err and
   host_name.log, where host_name is the name of your server host.
   Then examine the last few lines of these files. On Unix, you can
   use tail to display them:
shell> tail host_name.err
shell> tail host_name.log

   The error log should contain information that indicates why the
   server couldn't start.

   If either of the following errors occur, it means that some other
   program (perhaps another mysqld server) is using the TCP/IP port
   or Unix socket file that mysqld is trying to use:
Can't start server: Bind on TCP/IP port: Address already in use
Can't start server: Bind on unix socket...

   Use ps to determine whether you have another mysqld server
   running. If so, shut down the server before starting mysqld again.
   (If another server is running, and you really want to run multiple
   servers, you can find information about how to do so in Section
   5.6, "Running Multiple MySQL Servers on the Same Machine.")

   If no other server is running, try to execute the command telnet
   your_host_name tcp_ip_port_number. (The default MySQL port number
   is 3306.) Then press Enter a couple of times. If you don't get an
   error message like telnet: Unable to connect to remote host:
   Connection refused, some other program is using the TCP/IP port
   that mysqld is trying to use. You'll need to track down what
   program this is and disable it, or else tell mysqld to listen to a
   different port with the --port option. In this case, you'll also
   need to specify the port number for client programs when
   connecting to the server via TCP/IP.

   Another reason the port might be inaccessible is that you have a
   firewall running that blocks connections to it. If so, modify the
   firewall settings to allow access to the port.

   If the server starts but you can't connect to it, you should make
   sure that you have an entry in /etc/hosts that looks like this:
127.0.0.1       localhost

   This problem occurs only on systems that do not have a working
   thread library and for which MySQL must be configured to use
   MIT-pthreads.

   If you cannot get mysqld to start, you can try to make a trace
   file to find the problem by using the --debug-dbug option. See MySQL
   Internals: Porting
   (http://forge.mysql.com/wiki/MySQL_Internals_Porting).

2.13.2. Securing the Initial MySQL Accounts

   Part of the MySQL installation process is to set up the mysql
   database that contains the grant tables:

     * Windows distributions contain preinitialized grant tables that
       are installed automatically.

     * On Unix, the grant tables are populated by the
       mysql_install_db program. Some installation methods run this
       program for you. Others require that you execute it manually.
       For details, see Section 2.13.1, "Unix Post-Installation
       Procedures."

   The grant tables define the initial MySQL user accounts and their
   access privileges. These accounts are set up as follows:

     * Accounts with the user name root are created. These are
       superuser accounts that can do anything. The initial root
       account passwords are empty, so anyone can connect to the
       MySQL server as root --- without a password --- and be granted
       all privileges.

          + On Windows, one root account is created; this account
            allows connecting from the local host only. The Windows
            installer will optionally create an account allowing for
            connections from any host only if the user selects the
            Enable root access from remote machines option during
            installation.

          + On Unix, both root accounts are for connections from the
            local host. Connections must be made from the local host
            by specifying a host name of localhost for one of the
            accounts, or the actual host name or IP number for the
            other.

     * Two anonymous-user accounts are created, each with an empty
       user name. The anonymous accounts have no password, so anyone
       can use them to connect to the MySQL server.

          + On Windows, one anonymous account is for connections from
            the local host. It has no global privileges. (Before
            MySQL 5.1.16, it has all global privileges, just like the
            root accounts.) The other is for connections from any
            host and has all privileges for the test database and for
            other databases with names that start with test.

          + On Unix, both anonymous accounts are for connections from
            the local host. Connections must be made from the local
            host by specifying a host name of localhost for one of
            the accounts, or the actual host name or IP number for
            the other. These accounts have all privileges for the
            test database and for other databases with names that
            start with test_.

   As noted, none of the initial accounts have passwords. This means
   that your MySQL installation is unprotected until you do something
   about it:

     * If you want to prevent clients from connecting as anonymous
       users without a password, you should either assign a password
       to each anonymous account or else remove the accounts.

     * You should assign a password to each MySQL root account.

   The following instructions describe how to set up passwords for
   the initial MySQL accounts, first for the anonymous accounts and
   then for the root accounts. Replace "newpwd" in the examples with
   the actual password that you want to use. The instructions also
   cover how to remove the anonymous accounts, should you prefer not
   to allow anonymous access at all.

   You might want to defer setting the passwords until later, so that
   you don't need to specify them while you perform additional setup
   or testing. However, be sure to set them before using your
   installation for production purposes.

   Anonymous Account Password Assignment

   To assign passwords to the anonymous accounts, connect to the
   server as root and then use either SET PASSWORD or UPDATE. In
   either case, be sure to encrypt the password using the PASSWORD()
   function.

   To use SET PASSWORD on Windows, do this:
shell> mysql -u root
mysql> SET PASSWORD FOR ''@'localhost' = PASSWORD('newpwd');
mysql> SET PASSWORD FOR ''@'%' = PASSWORD('newpwd');

   To use SET PASSWORD on Unix, do this:
shell> mysql -u root
mysql> SET PASSWORD FOR ''@'localhost' = PASSWORD('newpwd');
mysql> SET PASSWORD FOR ''@'host_name' = PASSWORD('newpwd');

   In the second SET PASSWORD statement, replace host_name with the
   name of the server host. This is the name that is specified in the
   Host column of the non-localhost record for root in the user
   table. If you don't know what host name this is, issue the
   following statement before using SET PASSWORD:
mysql> SELECT Host, User FROM mysql.user;

   Look for the record that has root in the User column and something
   other than localhost in the Host column. Then use that Host value
   in the second SET PASSWORD statement.

   Anonymous Account Removal

   If you prefer to remove the anonymous accounts instead, do so as
   follows:
shell> mysql -u root
mysql> DROP USER '';

   The DROP statement applies both to Windows and to Unix. On
   Windows, if you want to remove only the anonymous account that has
   the same privileges as root, do this instead:
shell> mysql -u root
mysql> DROP USER ''@'localhost';

   That account allows anonymous access but has full privileges, so
   removing it improves security.

   root Account Password Assignment

   You can assign passwords to the root accounts in several ways. The
   following discussion demonstrates three methods:

     * Use the SET PASSWORD statement

     * Use the mysqladmin command-line client program

     * Use the UPDATE statement

   To assign passwords using SET PASSWORD, connect to the server as
   root and issue SET PASSWORD statements. Be sure to encrypt the
   password using the PASSWORD() function.

   For Windows, do this:
shell> mysql -u root
mysql> SET PASSWORD FOR 'root'@'localhost' = PASSWORD('newpwd');
mysql> SET PASSWORD FOR 'root'@'%' = PASSWORD('newpwd');

   For Unix, do this:
shell> mysql -u root
mysql> SET PASSWORD FOR 'root'@'localhost' = PASSWORD('newpwd');
mysql> SET PASSWORD FOR 'root'@'host_name' = PASSWORD('newpwd');

   In the second SET PASSWORD statement, replace host_name with the
   name of the server host. This is the same host name that you used
   when you assigned the anonymous account passwords.

   If the user table contains an account with User and Host values of
   'root' and '127.0.0.1', use an additional SET PASSWORD statement
   to set that account's password:
mysql> SET PASSWORD FOR 'root'@'127.0.0.1' = PASSWORD('newpwd');

   To assign passwords to the root accounts using mysqladmin, execute
   the following commands:
shell> mysqladmin -u root password "newpwd"
shell> mysqladmin -u root -h host_name password "newpwd"

   These commands apply both to Windows and to Unix. In the second
   command, replace host_name with the name of the server host. The
   double quotes around the password are not always necessary, but
   you should use them if the password contains spaces or other
   characters that are special to your command interpreter.

   The mysqladmin method of setting the root account passwords does
   not set the password for the 'root'@'127.0.0.1' account. To do so,
   use SET PASSWORD as shown earlier.

   You can also use UPDATE to modify the user table directly. The
   following UPDATE statement assigns a password to all root
   accounts:
shell> mysql -u root
mysql> UPDATE mysql.user SET Password = PASSWORD('newpwd')
    ->     WHERE User = 'root';
mysql> FLUSH PRIVILEGES;

   The UPDATE statement applies both to Windows and to Unix.

   After the passwords have been set, you must supply the appropriate
   password whenever you connect to the server. For example, if you
   want to use mysqladmin to shut down the server, you can do so
   using this command:
shell> mysqladmin -u root -p shutdown
Enter password: (enter root password here)

Note

   If you forget your root password after setting it up, Section
   B.5.4.1, "How to Reset the Root Password," covers the procedure
   for resetting it.

   To set up additional accounts, you can use the GRANT statement.
   For instructions, see Section 5.5.2, "Adding User Accounts."

2.14. Environment Variables

   This section lists all the environment variables that are used
   directly or indirectly by MySQL. Most of these can also be found
   in other places in this manual.

   Note that any options on the command line take precedence over
   values specified in option files and environment variables, and
   values in option files take precedence over values in environment
   variables.

   In many cases, it is preferable to use an option file instead of
   environment variables to modify the behavior of MySQL. See Section
   4.2.3.3, "Using Option Files."
   Variable Description
   CXX The name of your C++ compiler (for running configure).
   CC The name of your C compiler (for running configure).
   CFLAGS Flags for your C compiler (for running configure).
   CXXFLAGS Flags for your C++ compiler (for running configure).
   DBI_USER The default user name for Perl DBI.
   DBI_TRACE Trace options for Perl DBI.
   HOME The default path for the mysql history file is
   $HOME/.mysql_history.
   LD_RUN_PATH Used to specify the location of libmysqlclient.so.
   MYSQL_DEBUG Debug trace options when debugging.
   MYSQL_GROUP_SUFFIX Option group suffix value (like specifying
   --defaults-group-suffix).
   MYSQL_HISTFILE The path to the mysql history file. If this
   variable is set, its value overrides the default for
   $HOME/.mysql_history.
   MYSQL_HOME The path to the directory in which the server-specific
   my.cnf file resides (as of MySQL 5.0.3).
   MYSQL_HOST The default host name used by the mysql command-line
   client.
   MYSQL_PS1 The command prompt to use in the mysql command-line
   client.
   MYSQL_PWD The default password when connecting to mysqld. Note
   that using this is insecure. See Section 5.3.2.2, "End-User
   Guidelines for Password Security."
   MYSQL_TCP_PORT The default TCP/IP port number.
   MYSQL_UNIX_PORT The default Unix socket file name; used for
   connections to localhost.
   PATH Used by the shell to find MySQL programs.
   TMPDIR The directory where temporary files are created.
   TZ This should be set to your local time zone. See Section
   B.5.4.6, "Time Zone Problems."
   UMASK The user-file creation mode when creating files. See note
   following table.
   UMASK_DIR The user-directory creation mode when creating
   directories. See note following table.
   USER The default user name on Windows and NetWare used when
   connecting to mysqld.

   The UMASK and UMASK_DIR variables, despite their names, are used
   as modes, not masks:

     * If UMASK is set, mysqld uses ($UMASK | 0600) as the mode for
       file creation, so that newly created files have a mode in the
       range from 0600 to 0666 (all values octal).

     * If UMASK_DIR is set, mysqld uses ($UMASK_DIR | 0700) as the
       base mode for directory creation, which then is AND-ed with
       ~(~$UMASK & 0666), so that newly created directories have a
       mode in the range from 0700 to 0777 (all values octal). The
       AND operation may remove read and write permissions from the
       directory mode, but not execute permissions.

   MySQL assumes that the value for UMASK or UMASK_DIR is in octal if
   it starts with a zero.

2.15. Perl Installation Notes

   Perl support for MySQL is provided by means of the DBI/DBD client
   interface. The interface requires Perl 5.6.0, and 5.6.1 or later
   is preferred. DBI does not work if you have an older version of
   Perl.

   If you want to use transactions with Perl DBI, you need to have
   DBD::mysql 2.0900. If you are using the MySQL 4.1 or newer client
   library, you must use DBD::mysql 2.9003 or newer. Support for
   server-side prepared statements requires DBD::mysql 3.0009 or
   newer.

   Perl support is not included with MySQL distributions. You can
   obtain the necessary modules from http://search.cpan.org for Unix,
   or by using the ActiveState ppm program on Windows. The following
   sections describe how to do this.

   Perl support for MySQL must be installed if you want to run the
   MySQL benchmark scripts; see Section 7.1.3, "The MySQL Benchmark
   Suite." It is also required for the MySQL Cluster ndb_size.pl
   utility; see Section 17.4.21, "ndb_size.pl --- NDBCLUSTER Size
   Requirement Estimator."

2.15.1. Installing Perl on Unix

   MySQL Perl support requires that you have installed MySQL client
   programming support (libraries and header files). Most
   installation methods install the necessary files. However, if you
   installed MySQL from RPM files on Linux, be sure that you've
   installed the developer RPM. The client programs are in the client
   RPM, but client programming support is in the developer RPM.

   If you want to install Perl support, the files you need can be
   obtained from the CPAN (Comprehensive Perl Archive Network) at
   http://search.cpan.org.

   The easiest way to install Perl modules on Unix is to use the CPAN
   module. For example:
shell> perl -MCPAN -e shell
cpan> install DBI
cpan> install DBD::mysql

   The DBD::mysql installation runs a number of tests. These tests
   attempt to connect to the local MySQL server using the default
   user name and password. (The default user name is your login name
   on Unix, and ODBC on Windows. The default password is "no
   password.") If you cannot connect to the server with those values
   (for example, if your account has a password), the tests fail. You
   can use force install DBD::mysql to ignore the failed tests.

   DBI requires the Data::Dumper module. It may be installed; if not,
   you should install it before installing DBI.

   It is also possible to download the module distributions in the
   form of compressed tar archives and build the modules manually.
   For example, to unpack and build a DBI distribution, use a
   procedure such as this:

    1. Unpack the distribution into the current directory:
shell> gunzip < DBI-VERSION.tar.gz | tar xvf -
       This command creates a directory named DBI-VERSION.

    2. Change location into the top-level directory of the unpacked
       distribution:
shell> cd DBI-VERSION

    3. Build the distribution and compile everything:
shell> perl Makefile.PL
shell> make
shell> make test
shell> make install

   The make test command is important because it verifies that the
   module is working. Note that when you run that command during the
   DBD::mysql installation to exercise the interface code, the MySQL
   server must be running or the test fails.

   It is a good idea to rebuild and reinstall the DBD::mysql
   distribution whenever you install a new release of MySQL,
   particularly if you notice symptoms such as that all your DBI
   scripts fail after you upgrade MySQL.

   If you do not have access rights to install Perl modules in the
   system directory or if you want to install local Perl modules, the
   following reference may be useful:
   http://servers.digitaldaze.com/extensions/perl/modules.html#module
   s

   Look under the heading "Installing New Modules that Require
   Locally Installed Modules."

2.15.2. Installing ActiveState Perl on Windows

   On Windows, you should do the following to install the MySQL DBD
   module with ActiveState Perl:

    1. Get ActiveState Perl from
       http://www.activestate.com/Products/ActivePerl/ and install
       it.

    2. Open a console window (a "DOS window").

    3. If necessary, set the HTTP_proxy variable. For example, you
       might try a setting like this:
set HTTP_proxy=my.proxy.com:3128

    4. Start the PPM program:
C:\> C:\perl\bin\ppm.pl

    5. If you have not previously done so, install DBI:
ppm> install DBI

    6. If this succeeds, run the following command:
ppm> install DBD-mysql

   This procedure should work with ActiveState Perl 5.6 or newer.

   If you cannot get the procedure to work, you should install the
   MyODBC driver instead and connect to the MySQL server through
   ODBC:
use DBI;
$dbh= DBI->connect("DBI:ODBC:$dsn",$user,$password) ||
  die "Got error $DBI::errstr when connecting to $dsn\n";

2.15.3. Problems Using the Perl DBI/DBD Interface

   If Perl reports that it cannot find the ../mysql/mysql.so module,
   the problem is probably that Perl cannot locate the
   libmysqlclient.so shared library. You should be able to fix this
   problem by one of the following methods:

     * Compile the DBD::mysql distribution with perl Makefile.PL
       -static -config rather than perl Makefile.PL.

     * Copy libmysqlclient.so to the directory where your other
       shared libraries are located (probably /usr/lib or /lib).

     * Modify the -L options used to compile DBD::mysql to reflect
       the actual location of libmysqlclient.so.

     * On Linux, you can add the path name of the directory where
       libmysqlclient.so is located to the /etc/ld.so.conf file.

     * Add the path name of the directory where libmysqlclient.so is
       located to the LD_RUN_PATH environment variable. Some systems
       use LD_LIBRARY_PATH instead.

   Note that you may also need to modify the -L options if there are
   other libraries that the linker fails to find. For example, if the
   linker cannot find libc because it is in /lib and the link command
   specifies -L/usr/lib, change the -L option to -L/lib or add -L/lib
   to the existing link command.

   If you get the following errors from DBD::mysql, you are probably
   using gcc (or using an old binary compiled with gcc):
/usr/bin/perl: can't resolve symbol '__moddi3'
/usr/bin/perl: can't resolve symbol '__divdi3'

   Add -L/usr/lib/gcc-lib/... -lgcc to the link command when the
   mysql.so library gets built (check the output from make for
   mysql.so when you compile the Perl client). The -L option should
   specify the path name of the directory where libgcc.a is located
   on your system.

   Another cause of this problem may be that Perl and MySQL are not
   both compiled with gcc. In this case, you can solve the mismatch
   by compiling both with gcc.

   You may see the following error from DBD::mysql when you run the
   tests:
t/00base............install_driver(mysql) failed:
Can't load '../blib/arch/auto/DBD/mysql/mysql.so' for module DBD::mys
ql:
../blib/arch/auto/DBD/mysql/mysql.so: undefined symbol:
uncompress at /usr/lib/perl5/5.00503/i586-linux/DynaLoader.pm line 16
9.

   This means that you need to include the -lz compression library on
   the link line. That can be done by changing the following line in
   the file lib/DBD/mysql/Install.pm:
$sysliblist .= " -lm";

   Change that line to:
$sysliblist .= " -lm -lz";

   After this, you must run make realclean and then proceed with the
   installation from the beginning.

   If you want to install DBI on SCO, you have to edit the Makefile
   in DBI-xxx and each subdirectory. Note that the following assumes
   gcc 2.95.2 or newer:
OLD:                                  NEW:
CC = cc                               CC = gcc
CCCDLFLAGS = -KPIC -W1,-Bexport       CCCDLFLAGS = -fpic
CCDLFLAGS = -wl,-Bexport              CCDLFLAGS =

LD = ld                               LD = gcc -G -fpic
LDDLFLAGS = -G -L/usr/local/lib       LDDLFLAGS = -L/usr/local/lib
LDFLAGS = -belf -L/usr/local/lib      LDFLAGS = -L/usr/local/lib

LD = ld                               LD = gcc -G -fpic
OPTIMISE = -Od                        OPTIMISE = -O1

OLD:
CCCFLAGS = -belf -dy -w0 -U M_XENIX -DPERL_SCO5 -I/usr/local/include

NEW:
CCFLAGS = -U M_XENIX -DPERL_SCO5 -I/usr/local/include

   These changes are necessary because the Perl dynaloader does not
   load the DBI modules if they were compiled with icc or cc.

   If you want to use the Perl module on a system that does not
   support dynamic linking (such as SCO), you can generate a static
   version of Perl that includes DBI and DBD::mysql. The way this
   works is that you generate a version of Perl with the DBI code
   linked in and install it on top of your current Perl. Then you use
   that to build a version of Perl that additionally has the DBD code
   linked in, and install that.

   On SCO, you must have the following environment variables set:
LD_LIBRARY_PATH=/lib:/usr/lib:/usr/local/lib:/usr/progressive/lib

   Or:
LD_LIBRARY_PATH=/usr/lib:/lib:/usr/local/lib:/usr/ccs/lib:\
    /usr/progressive/lib:/usr/skunk/lib
LIBPATH=/usr/lib:/lib:/usr/local/lib:/usr/ccs/lib:\
    /usr/progressive/lib:/usr/skunk/lib
MANPATH=scohelp:/usr/man:/usr/local1/man:/usr/local/man:\
    /usr/skunk/man:

   First, create a Perl that includes a statically linked DBI module
   by running these commands in the directory where your DBI
   distribution is located:
shell> perl Makefile.PL -static -config
shell> make
shell> make install
shell> make perl

   Then you must install the new Perl. The output of make perl
   indicates the exact make command you need to execute to perform
   the installation. On SCO, this is make -f Makefile.aperl inst_perl
   MAP_TARGET=perl.

   Next, use the just-created Perl to create another Perl that also
   includes a statically linked DBD::mysql by running these commands
   in the directory where your DBD::mysql distribution is located:
shell> perl Makefile.PL -static -config
shell> make
shell> make install
shell> make perl

   Finally, you should install this new Perl. Again, the output of
   make perl indicates the command to use.
