into  mysql.com:/usersnfs/abotchkov/mysql-5.0-opt1

into  mysql.com:/home/hf/work/current_stmt/my50-current_stmt

into  mysql.com:/home/hf/work/current_stmt/my50-current_stmt

the incompatibility was caused by current_stmt member added to the MYSQL
structure.
It's possible to move it to THD structure instead which saves ABI

into  mysql.com:/home/hf/work/w3475/my50-w3475

into  mysql.com:/home/hf/work/w3475/my50-w3475

into  mysql.com:/home/hf/work/w3475/my50-w3475

Necessary code added to mysqltest.c.
Disabled tests are available now.

into  rurik.mysql.com:/home/igor/mysql-5.0-opt

into  rurik.mysql.com:/home/igor/mysql-5.0-opt

into  dl145s.mysql.com:/data/bk/team_tree_merge/MERGE/mysql-5.0-opt

into  dl145s.mysql.com:/data/bk/team_tree_merge/MERGE/mysql-5.0-opt

into  dl145s.mysql.com:/data/bk/team_tree_merge/MERGE/mysql-4.1-opt

If elements a not top-level IN subquery were accessed by an index and 
the subquery result set included  a NULL value then the quantified
predicate that contained the subquery was evaluated to NULL when 
it should return a non-null value.

into  mysql.com:/home/svoj/devel/mysql/engines/mysql-5.0-engines

into  dl145s.mysql.com:/data/bk/team_tree_merge/MERGE/mysql-5.0-opt

into  dl145s.mysql.com:/data/bk/team_tree_merge/MERGE/mysql-5.0-opt

into  mysql.com:/home/svoj/devel/mysql/engines/mysql-4.1-engines

into  dl145s.mysql.com:/data/bk/team_tree_merge/MERGE/mysql-4.1-opt

into  mysql.com:/home/svoj/devel/mysql/engines/mysql-4.1-engines

Backport from 5.1.
Raised STACK_MIN_SIZE for Debian GNU/Linux Sid,
Linux kernel 2.6.16,
gcc version 3.3.6 (Debian 1:3.3.6-13),
libc6-dbg 2.3.6.ds1-4,
Pentium4 (x86),
BUILD/compile-pentium-debug-max
Raised about 100 Bytes above the required minimum.

into  chilla.local:/home/mydev/mysql-5.0-merge

into  chilla.local:/home/mydev/mysql-5.0-merge

into  chilla.local:/home/mydev/mysql-4.1-merge

into  mysql.com:/data0/bk/mysql-5.0-kt

Repair table could crash a server if there is not sufficient
memory (myisam_sort_buffer_size) to operate. Affects not only
repair, but also all statements that use create index by sort:
repair by sort, parallel repair, bulk insert.

Return an error if there is not sufficient memory to store at
least one key per BUFFPEK.

Also fixed memory leak if thr_find_all_keys returns an error.

into  sunlight.local:/local_work/14959-bug-5.0-opt-mysql

  Cleanup of fix for bug#14959.

into  rurik.mysql.com:/home/igor/mysql-5.0-opt

into  rurik.mysql.com:/home/igor/dev-opt/mysql-5.0-opt-bug19579

into  macbook.gmz:/Users/kgeorge/mysql/work/B21798-5.0-opt-merge

            list using a function
When executing dependent subqueries they are re-inited and re-exec() for 
each row of the outer context.
The cause for the bug is that during subquery reinitialization/re-execution,
the optimizer reallocates JOIN::join_tab, JOIN::table in make_simple_join()
and the local variable in 'sortorder' in create_sort_index(), which is
allocated by make_unireg_sortorder().
Care must be taken not to allocate anything into the thread's memory pool
while re-initializing query plan structures between subquery re-executions.
All such items mush be cached and reused because the thread's memory pool
is freed at the end of the whole query.
Note that they must be cached and reused even for queries that are not 
otherwise cacheable because otherwise it will grow the thread's memory 
pool every time a cacheable query is re-executed. 
We provide additional members to the JOIN structure to store references 
to the items that need to be cached.

into  macbook.gmz:/Users/kgeorge/mysql/work/B22367-5.0-opt-merge