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2 commits

Author SHA1 Message Date
Sergey Petrunya
47861a6577 Change the default @@optimizer_switch settings: 
- semijoin=on
- firstmatch=on
- loosescan=on
 2011-11-02 13:48:41 +04:00
Sergey Petrunya
b83cb52e9e Backport of subquery optimizations to 5.3. 
There are still test failures because of:
- Wrong query results in outer join + semi join
- EXPLAIN output differences
 2010-01-17 17:51:10 +03:00