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  chilla.local:/home/mydev/mysql-4.1-bug8283-one

into  chilla.local:/home/mydev/mysql-4.1-bug8283-one

OPTIMIZE TABLE with myisam_repair_threads > 1 performs a non-quick 
parallel repair. This means that it does not only rebuild all 
indexes, but also the data file.

Non-quick parallel repair works so that there is one thread per 
index. The first of the threads rebuilds also the new data file.

The problem was that all threads shared the read io cache on the
old data file. If there were holes (deleted records) in the table,
the first thread skipped them, writing only contiguous, non-deleted
records to the new data file. Then it built the new index so that
its entries pointed to the correct record positions. But the other
threads didn't know the new record positions, but put the positions
from the old data file into the index.

The new design is so that there is a shared io cache which is filled
by the first thread (the data file writer) with the new contiguous
records and read by the other threads. Now they know the new record
positions.

Another problem was that for the parallel repair of compressed
tables a common bit_buff and rec_buff was used. I changed it so
that thread specific buffers are used for parallel repair.

A similar problem existed for checksum calculation. I made this
multi-thread safe too.

into  may.pils.ru:/home/svoj/devel/bk/mysql-4.1-engines

into  mysql.com:/home/svoj/devel/mysql/BUG22937/mysql-4.1-engines

This is addition to fix for bug21617. Valgrind reports an error when
opening merge table that has underlying tables with less indexes than
in a merge table itself.

Copy at most min(file->keys, table->key_parts) elements from rec_per_key array.
This fixes problems when merge table and subtables have different number of keys.

into  mysql.com:/home/svoj/devel/mysql/BUG21381/mysql-4.1-engines

Though this is not storage engine specific problem, I was able to
repeat this problem with BDB and NDB engines only. That was the
reason to add a test case into ndb_update.test. As a result
different bad things could happen.

BDB has removed duplicate rows which is not expected.
NDB returns an error.

For multi table update notify storage engine about UPDATE IGNORE
as it is done in single table UPDATE.

into  mysql.com:/home/gluh/MySQL/Merge/4.1-kt

into  neptunus.(none):/home/msvensson/mysql/mysql-4.1-maint

into  neptunus.(none):/home/msvensson/mysql/mysql-4.1-maint

into  neptunus.(none):/home/msvensson/mysql/mysql-4.1-maint

into  neptunus.(none):/home/msvensson/mysql/mysql-4.1-maint

into  shellback.(none):/home/msvensson/mysql/mysql-4.1-maint

into  mysql.com:/usr/home/bar/mysql-4.1-rpl

into  mockturtle.local:/home/dlenev/src/mysql-4.1-rt-merge

into  shellback.(none):/home/msvensson/mysql/mysql-4.1-maint

This was available from gcc 3.1, so diable it before that
Update m_ctype.h to use the new macro

into  siva.hindu.god:/usr/home/tim/m/bk/41

into  siva.hindu.god:/usr/home/tim/m/bk/41

into  siva.hindu.god:/usr/home/tim/m/bk/40

When compiling with qcc on QNC the define __GNUC__will be set although it doesn't support full GNU syntax
 - disable __attribute__ when using qcc

into  neptunus.(none):/home/msvensson/mysql/mysql-4.1-maint

into  neptunus.(none):/home/msvensson/mysql/mysql-4.1-maint

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

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

into  rama.(none):/home/jimw/my/mysql-4.1-clean

into  rama.(none):/home/jimw/my/mysql-4.1-clean

into  zippy.cornsilk.net:/home/cmiller/work/mysql/mysql-4.1-maint

into  chilla.local:/home/mydev/mysql-4.0-bug20719

into  chilla.local:/home/mydev/mysql-4.1-bug22384

into  rama.(none):/home/jimw/my/mysql-4.1-clean