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Subquery optimizations: Backport into 5.3:

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- Enable semi-join handling in the join cache code
This commit is contained in:
Sergey Petrunya
2010-01-19 01:32:23 +03:00
parent 085e8b6935
commit 742afd8eae
2 changed files with 2 additions and 8 deletions
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sql/sql_select.h
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@ -1197,6 +1197,7 @@ enum_nested_loop_state sub_select(JOIN *join,JOIN_TAB *join_tab, bool
end_of_records);
enum_nested_loop_state sub_select_sjm(JOIN *join, JOIN_TAB *join_tab,
bool end_of_records);
int do_sj_dups_weedout(THD *thd, SJ_TMP_TABLE *sjtbl);
/**
Information about a position of table within a join order. Used in join