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- Backport @@optimizer_switch support from 6.0

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- Add support for setting it as a server commandline argument
- Add support for those switches:
  = no_index_merge
  = no_index_merge_union
  = no_index_merge_sort_union
  = no_index_merge_intersection

mysql-test/r/index_merge_myisam.result:
  Testcases for index_merge related @@optimizer_switch flags.
mysql-test/t/index_merge_myisam.test:
  Testcases for index_merge related @@optimizer_switch flags.
sql/set_var.cc:
  - Backport @@optimizer_switch support from 6.0
  - Add support for setting it as a server commandline argument
sql/sql_class.h:
  - Backport @@optimizer_switch support from 6.0
sql/sql_select.h:
  - Backport @@optimizer_switch support from 6.0
This commit is contained in:
Sergey Petrunia
2009-02-23 19:16:48 +03:00
parent fecaef26af
commit cb6581d894
9 changed files with 382 additions and 23 deletions
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6
sql/sql_select.h
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@ -729,3 +729,9 @@ bool error_if_full_join(JOIN *join);
int report_error(TABLE *table, int error);
int safe_index_read(JOIN_TAB *tab);
COND *remove_eq_conds(THD *thd, COND *cond, Item::cond_result *cond_value);
inline bool optimizer_flag(THD *thd, uint flag)
{
return (thd->variables.optimizer_switch & flag);
}