errors
            
In the fix of BUG#39934 in 5.1-rep+3, errors are generated when
binlog_format=row and a statement modifies a table restricted to
statement-logging (ER_BINLOG_ROW_MODE_AND_STMT_ENGINE); or if
binlog_format=statement and a statement modifies a table restricted to
row-logging (ER_BINLOG_STMT_MODE_AND_ROW_ENGINE).
            
However, some DDL statements that lock tables (e.g. ALTER TABLE,
CREATE INDEX and CREATE TRIGGER) were causing spurious errors,
although no row might be inserted into the binary log.
            
To fix the problem, we tagged statements that may generate
rows into the binary log and thence the warning messages are
only printed out when the appropriate conditions hold and rows
might be changed.

sql/log_event.cc:
  Reorganized the Query_log_event's constructor based on the
  CF_CAN_GENERATE_ROW_EVENTS flag and as such any statement
  that has the associated flag should go through a cache
  before being written to the binary log.
sql/share/errmsg-utf8.txt:
  Improved the error message ER_BINLOG_UNSAFE_MIXED_STATEMENT according to Paul's
  suggestion.
sql/sql_class.cc:
  Created a hook to be used by innodb that checks if a statement
  may write rows to the binary log. In other words, if it has
  the CF_CAN_GENERATE_ROW_EVENTS flag associated.
sql/sql_class.h:
  Defined the CF_CAN_GENERATE_ROW_EVENTS flag.
sql/sql_parse.cc:
  Updated the sql_command_flags and added a function to check the 
  CF_CAN_GENERATE_ROW_EVENTS.
sql/sql_parse.h:
  Added a function to check the CF_CAN_GENERATE_ROW_EVENTS.
storage/innobase/handler/ha_innodb.cc:
  Added a call to the hook thd_generates_rows().
storage/innobase/handler/ha_innodb.h:
  Defined an external reference to the hook thd_generates_rows().

breaks
      
When a "CREATE TEMPORARY TABLE SELECT * FROM" was executed the OPTION_KEEP_LOG was
not set into the thd->variables.option_bits. For that reason, if the transaction
had updated only transactional engines and was rolled back at the end (.e.g due to
a deadlock) the changes were not written to the binary log, including the creation
of the temporary table.
      
To fix the problem, we have set the OPTION_KEEP_LOG into the
thd->variables.option_bits when a "CREATE TEMPORARY TABLE
SELECT * FROM" is executed.

Due to a BZR bug, that merge was done by the following command:
bzr merge -r 'revid:tor.didriksen@sun.com-20100527074248-6qtv0p1ugy6o1hjo..' <mysql-trunk-bugfixing path>

  ------------------------------------------------------------
  revno: 3490
  revision-id: marko.makela@oracle.com-20100601120751-1uq7bbta5n7ts0qr
  parent: marko.makela@oracle.com-20100601120521-q48hk05ne4j1s2o0
  committer: Marko Mäkelä <marko.makela@oracle.com>
  branch nick: 5.1-innodb
  timestamp: Tue 2010-06-01 15:07:51 +0300
  message:
    Minor cleanup.

    lock_rec_unlock(): Cache first_lock and rewrite while() loops as for().

    btr_cur_optimistic_update(): Use common error handling return.

    row_create_prebuilt(): Add Valgrind instrumentation.

  ------------------------------------------------------------
  revno: 3488
  revision-id: marko.makela@oracle.com-20100601103738-upm8awahesmeh9dr
  parent: vasil.dimov@oracle.com-20100531163540-9fu3prbn2asqwdi5
  committer: Marko Mäkelä <marko.makela@oracle.com>
  branch nick: 5.1-innodb
  timestamp: Tue 2010-06-01 13:37:38 +0300
  message:
    Bug#53812: assert row/row0umod.c line 660 in txn rollback after crash recovery
    row_undo_mod_upd_exist_sec(): Tolerate a failure to build the index entry
    for a DYNAMIC or COMPRESSED table during crash recovery.

  ------------------------------------------------------------
  revno: 3478.1.3
  revision-id: marko.makela@oracle.com-20100525123748-pmpehbg29oyhc1ns
  parent: marko.makela@oracle.com-20100524114349-5kaw52sz0yh4szkb
  committer: Marko Mäkelä <marko.makela@oracle.com>
  branch nick: 5.1-innodb
  timestamp: Tue 2010-05-25 15:37:48 +0300
  message:
    Suppress bogus Valgrind warnings about buf_buddy_relocate()
    accessing uninitialized memory in Valgrind-instrumented builds.

  ------------------------------------------------------------
  revno: 3478.1.4
  revision-id: marko.makela@oracle.com-20100525125352-hgafpmqhrrj7pv5i
  parent: marko.makela@oracle.com-20100525123748-pmpehbg29oyhc1ns
  committer: Marko Mäkelä <marko.makela@oracle.com>
  branch nick: 5.1-innodb
  timestamp: Tue 2010-05-25 15:53:52 +0300
  message:
    row_search_for_mysql(): Add assertions to track down Bug #53627.

previous.

Convert some shell bits to standard 2-space indent, 80 columns, etc.

Check the length and use strncpy to make the code safer.

Check the length and use strncpy to make the code safer.

plugin/semisync/semisync_master.cc:
  replace strcpy with strncpy to make the code safer

Destroy the rw-lock object before freeing the memory it is occupying.
If we do not do this, then the mutex that is contained in the rw-lock
object btr_search_latch_temp->mutex gets "freed" and subsequently
mutex_free() from sync_close() hits a mutex whose memory has been
freed and crashes.

Approved by:	Heikki (via IRC)
Discussed with:	Calvin

  - revid:sp1r-svoj@mysql.com/june.mysql.com-20080324111246-00461
  - revid:sp1r-svoj@mysql.com/june.mysql.com-20080414125521-40866

  BUG#35274 - merge table doesn't need any base tables, gives
              error 124 when key accessed

  SELECT queries that use index against a merge table with empty
  underlying tables list may return with error "Got error 124 from
  storage engine".

  The problem was that wrong error being returned.

mysql-test/r/merge.result:
  Backport of
    - revid:sp1r-svoj@mysql.com/june.mysql.com-20080324111246-00461
    - revid:sp1r-svoj@mysql.com/june.mysql.com-20080414125521-40866
  
    A test case for BUG#35274.
  
    Modified a test case according to fix for BUG#35274. Key based
    reads are now allowed for merge tables with no underlying tables
    defined.
mysql-test/t/merge.test:
  Backport of
    - revid:sp1r-svoj@mysql.com/june.mysql.com-20080324111246-00461
    - revid:sp1r-svoj@mysql.com/june.mysql.com-20080414125521-40866
  
    A test case for BUG#35274.
  
    Modified a test case according to fix for BUG#35274. Key based
    reads are now allowed for merge tables with no underlying tables
    defined.
storage/myisammrg/myrg_queue.c:
  Backport of
    - revid:sp1r-svoj@mysql.com/june.mysql.com-20080324111246-00461
    - revid:sp1r-svoj@mysql.com/june.mysql.com-20080414125521-40866
  
    Return "end of file" error instead of "wrong index" error when
    we got a merge table with empty underlying tables list.
  
    In 5.1 we cannot rely on info->open_tables value when checking
    if a merge table has no underlying tables defined.
    Use info->tables instead.

            when it should use index

Sometimes the LEFT/RIGHT JOIN with an empty table caused an
unnecessary filesort.

Sample query, where t1.i1 is indexed and t3 is empty:

  SELECT t1.*, t2.* FROM t1 JOIN t2 ON t1.i1 = t2.i2
                       LEFT JOIN t3 ON t2.i2 = t3.i3
    ORDER BY t1.i1 LIMIT 5;

The server erroneously used an item of empty outer-joined
table as a common constant of a Item_equal (multi-equivalence
expression).
By the fix for the bug 16590 the constant status of such
an item has been propagated to st_table::const_key_parts
map bits related to other Item_equal argument-related
key parts (those are obviously not constant in our case).
As far as test_if_skip_sort_order function skips constant
prefixes of testing keys, this caused an ignorance of
available indices, since some prefixes were marked as
constant by mistake.


mysql-test/r/order_by.result:
  Test case for bug #38745.
mysql-test/t/order_by.test:
  Test case for bug #38745.
sql/item.h:
  Bug #38745: MySQL 5.1 optimizer uses filesort for ORDER BY
              when it should use index
  
  Item::is_outer_field() has been added and overloaded for
  Item_field and Item_ref classes.
sql/item_cmpfunc.cc:
  Bug #38745: MySQL 5.1 optimizer uses filesort for ORDER BY
              when it should use index
  
  Item_equal::update_const() and Item_equal::update_used_tables()
  have been updated to not take into account the constantness
  of outer-joined table items.

Backport from mysql-pe (of those parts which have not been upmerged from 5.1)



sql/field.cc:
  Local scope variable or method argument same as class attribute.
sql/item.cc:
  Rename auto variable to avoid name clash.
sql/item.h:
  Item_ref::basic_const_item had wrong signature (missing const)
  and was thus never called.
sql/partition_info.cc:
  Rename, to avoid name clashes.
sql/sql_load.cc:
  Rename, to avoid name clashes.

Reorganize function to reflect that it does not actually uses curses
and that there is no curses variant.

client/mysql.cc:
  Remove unused functions.
client/sql_string.cc:
  Remove unused functions.
include/my_pthread.h:
  Remove unused prototype.
mysys/my_pthread.c:
  Remove unused function.
sql/lock.cc:
  Remove unused function.
sql/lock.h:
  Remove unused and duplicated prototypes.
sql/sql_class.h:
  Removed unused variables.
sql/sql_const.h:
  Remove unused defines.
sql/sql_priv.h:
  Remove unused defines.
sql/sql_string.cc:
  Remove unused prototype.
sql/thr_malloc.cc:
  Remove unused function.
sql/thr_malloc.h:
  Remove unused prototype.
storage/myisam/CMakeLists.txt:
  Remove obsolete fulltext file.
storage/myisam/Makefile.am:
  Remove obsolete files (were already commented out).
storage/myisam/ft_eval.c:
  Remove obsolete fulltext file.
storage/myisam/ft_eval.h:
  Remove obsolete fulltext file.
storage/myisam/ft_stem.c:
  Remove obsolete fulltext file.
storage/myisam/ft_test1.c:
  Remove obsolete fulltext file.
storage/myisam/ft_test1.h:
  Remove obsolete fulltext file.

Formatting cleanup: removing tabs and trailing spaces
to conform to MySQL Internals Coding Guidelines.

The problem is that if a NULL is stored in an Item_cache_decimal object,
the associated my_decimal object is not initialized.  However, it is still
accessed when val_int() is called. The fix is to check for null_value
within val_int(), and return without accessing the my_decimal object when
the cached value is NULL.

Bug#52122 reports the same issue for val_real(), and this patch also includes
fixes for val_real() and val_str() and corresponding test cases from that
bug report.  

Also, NULL is returned from val_decimal() when value is null. This will
avoid that callers access an uninitialized my_decimal object.

Made similar changes to all other Item_cache classes.  Now all val_*
methods should return a well defined value when actual value is NULL.

mysql-test/r/type_decimal.result:
  Updated result file with test cases for Bug#52168 and Bug#52122.
mysql-test/t/type_decimal.test:
  Added test cases for Bug#52168 and Bug#52122.
sql/item.cc:
  In Item_cache_*::val_* methods, return a well defined value
  when actual value is NULL.
  
  This is especially important for Item_cache_decimal since
  otherwise one risk accessing an uninitialized my_decimal object.
sql/item.h:
  Added method Item_cache::has_value() which returns TRUE if cache 
  object contains a non-null value.

r3119 does not prevent the crash even the test is disabled.
The crash occurs during shutdown.

consecutive_ios[0] cannot be NULL when slot is assigned.

is not needed any more with current versions of FreeBSD.
(Entries 52410 and 52412 in the Bug DB)

That change is based on Dan Nelson replying on the
FreeBSD mailing list, freebsd-questions@freebsd.org
in a thread running from 2010-Apr-29 to 2010-May-1 titled
     "Need info about FreeBSD and interrupted system
      calls for MySQL code"

Also, ensure the cmake settings correspond to the autotools
ones: Add "HAVE_BROKEN_REALPATH" to cmake.


cmake/os/FreeBSD.cmake:
  With current versions of FreeBSD, threading is not done on
  the user-level any more, so the huge "net retry count"
  is not needed any more.
  However, it is still being kept as a comment for now,
  so that it can be re-activated should the need arise.
  
  In addition, set "HAVE_BROKEN_REALPATH" to completely
  mirror the autotools path.
configure.in:
  With current versions of FreeBSD, threading is not done on
  the user-level any more, so the huge "net retry count"
  is not needed any more.
  This definitely holds for FreeBSD version 6 and up.
  
  Adapt the informational messages to the path taken.

      list a thread doing a wait_ex as an s-lock waiter.