row_prebuilt_free(): Do not attempt to drop orphan indexes
that might have been left behind by a failed ADD UNIQUE INDEX.
This avoids the execution of unwanted transactions during shutdown.

Test do we have galera debug library with debug_sync functionality
needs to be earlier.

Also add a check for tmp file being empty and bail out with a clear
error message in such a case, as mysqld_safe prevents normal stderr
from being displayed anywhere and would fail silently on this.

MDEV-22181 : galera.galera_sst_mysqldump_with_key MTR failed: INSERT failed: 1146: Table 'test.t1' doesn't exist

Add wait condition to make sure table test.t1 is replicated
to node_2 before we insert to it.

config.

The solution is to read the system variable value on startup and to fill
databases_exclude_hash.

xb_load_list_string() became non-static and was reformatted. The system
variable value is read and processed in get_mysql_vars(), which was also
reformatted.

Backported fix from 10.5

Part of:
MDEV-21056 Assertion `global_status_var.global_memory_used == 0'
failed upon shutdown after query with DEFAULT on a geometry
field

Fixed by changing the ASSERT for memory leaks to a printf() on
stderr. This has needed as all mutex in mysys has been deleted and we
can't call functions like my_open() anymore.

Also added printing of leaks if safemalloc is used (like we do in 10.5)

- Remove memory leaks reported by safemalloc
- Changed that all 0x strings are converted. This is needed
  to easily be able to resolve safemalloc backtraces

MDEV-21056  Assertion `global_status_var.global_memory_used == 0'
failed upon shutdown after query with DEFAULT on a geometry
field

MDEV-22275 Assertion `global_status_var.global_memory_used == 0'
failed, bytes lost, or LeakSanitizer: detected memory leaks
after using temporary table with fulltext key

This affected MyISAM and Aria temporary tables

maria_page_crc_check_index(): Do not attempt to convert
HA_ERR_WRONG_CRC (176) to my_bool (char).
On platforms where char is signed, the 176 will be converted to -80.

It turns out that the callers only care whether the result is zero.
Let us return 1 in this case, like we do in all other error cases.

Several tests that involve stored procedures fail on 10.4 kvm-asan
(clang 10) due to stack overrun. The main contributor to this stack
overrun is mysql_execute_command(), which is invoked recursively
during stored procedure execution.

Rebuilding with cmake -DWITH_WSREP=OFF shrunk the stack frame size
of mysql_execute_command() by more than 10 kilobytes in a
WITH_ASAN=ON, CMAKE_BUILD_TYPE=Debug build. The culprit
turned out to be the macro WSREP_LOG, which is allocating a
separate 1KiB buffer for every occurrence.

We replace the macro with a function, so that the stack will be
allocated only when the function is actually invoked. In this way,
no stack space will be wasted by default (when WSREP and Galera
are disabled).

This backports commit b6c5657e
from MariaDB 10.3.1.

Without ASAN, compilers can be smarter and optimize the stack usage.
The original commit message mentions that 1KiB was saved on GCC 5.4,
and 4KiB on Mac OS X Lion, which presumably uses a clang-based compiler.

After MDEV-12353, the consistency check that I originally added for
commit 1b9fe0bb
(InnoDB Plugin for MySQL 5.1) started randomly failing.

It turns out that the IMPORT TABLESPACE code was always incorrect:
it did not update the (redundantly stored) tablespace ID
in index tree root pages. It only does that for page headers
and BLOB pointers.

PageConverter::update_index_page(): Update the tablespace ID
in the BTR_SEG_TOP and BTR_SEG_LEAF of index root pages.

This is a backport of commit b8b3edff.

For some reason, when mbstream is compiled with GCC 10,
ld will fail to link it due to a multiple definition of
datasink_buffer. The code appears to have been like that
since the very beginning.

Let us remove the duplicate dummy definition.

Windows GNU patch 2.7.6 is ok without it.

So account for the old buildbot version for now.

Linux works without it.

--binary fails on FreeBSD-12.0:

$ patch --version
patch 2.0-12u11 FreeBSD
$ patch --binary
patch: unrecognized option `--binary'

This reverts commit 1749a689.

The reason why we need --binary for patch is because of a bug in
patch.exe 2.5.9. We need to supply binary otherwise the patch program
crashes.

Tests will fail otherwise. Backport change from:
867809f2

Include CMAKE_C{XX,}_FLAGS=/W0 as 10k warnings
exist in 10.1 branch which cause the build to fail.

This causes problems on FreeBSD which doesn't have a patch
that supports this.

Linux and Windows don't require it either.

Was added in c3987707 without
explaination.

Fixed a couple of race conditions in the test case to ensure stable order
of events. Also removed all sleeps. Test execution time is down from 18s
to 0.15s.

On disconnect audit event is triggered after control is returned to
mysqltest client. Which means mysqltest may issue more commands
concurrently before disconnect is actually logged.

Similar problem happens with regular query execution: an event is
triggered after control is returner to the client. Which may end
up with unstable order of events in different connections.

Delayed insert rows are enqueued separately and can either be combined
into single event or go as separate events. Reduced number of inserted
rows to 1 to stabilize result.

Also backported 2b3f6ab4 from 10.5.

When index_merge_sort_union is turned off only ror scans were considered for range
scans, which is wrong.
To fix the problem ensure both ror scans and non ror scans are considered for range
access

When trying to start mariadb via systemctl, WSREP failed
to start mysqld for wsrep recovery, because the binary
"galera-recovery" is neither searching the mysqld in the
same folder as the binary itself nor in the path variable
but instead expects the root to be /usr/local/mysql.

This fix changes the current directory to the desired
directory before starting mysqld.

cmake module name is BZip2, not BZIP2.
variable names are WITH_ROCKSDB_zstd and WITH_ROCKSDB_snappy.
it's SNAPPY_FOUND in older cmake (and both in newer cmake).
also, make it verbose.

was restored.

Optionally rollback prepared XA's on "mariabackup --prepare".

The fix MUST NOT be ported on 10.5+, as MDEV-742 fix solves the issue for
slaves.

A new parameter has been added called xml-report, with which the
filename of the XML file is given to which the XML result is
written. There is also xml-package for adding a package value in
the XML output. Example usage:
./mysql-test-run.pl main.events_bugs innodb.count_distinct
main.explain_json innodb.file_format_defaults json.json_no_table
--suite=main,innodb,json --force --xml-report=build123456789.xml
--xml-package=simpletestrun

The log file is opened as root since commit bb7a70c9, so there is no need
to chown it.

It took me a long time to debug why my configs were not being loaded,
and judging from online discussions I'm not the only one. Make the
comment in the default my.cnf a bit more helpful.

The !includedir directive is implemented in mysys/my_default.c.

- f_extensions[] is a list of file extensions. It includes .ini and .cnf
  on Windows, and only .cnf on all other platforms.
- search_default_file_with_ext() contains the !includedir directive. It
  filters files in the directory to those matching f_extensions[].

This file should only be applicable on Unix-like platforms, so only
files with the .cnf extension are read.

Closes #1485

Let us enable all GCC and clang warnings independently of the
MYSQL_MAINTAINER_MODE setting for both Debug and RelWithDebInfo
builds, and have MYSQL_MAINTAINER_MODE only enable -Werror.

The default setting of MYSQL_MAINTAINER_MODE=AUTO will continue
to apply the -Werror only to CMAKE_BUILD_TYPE=Debug. To build
a debug version without -Werror, MYSQL_MAINTAINER_MODE=OFF can
be used.

Added indication of truncated string for "s" and "M" formats

The test main.mysqltest could crash or hang with
cmake -DWITH_ASAN=ON builds. The reason appears to be
a memory leak, which was found out by manually invoking

echo --replace_regex a > file
ASAN_OPTIONS=log_path=/dev/shm/asan mysqltest ... < file

and then examining the /dev/shm/asan.* file.