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MWL#90: Subqueries: Inside-out execution for non-semijoin materialized subqueries that are AND-parts of the WHERE

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- Code cleanu.
- Make MWL#90 code require @@optimizer_switch='semijoin=on'
- Update test results with the above
- Fork subselect_mat.test - we want to check both semi-join materialization, 
  which now has broader scope and non-semijoin materialization.
This commit is contained in:
Sergey Petrunya
2010-05-25 10:32:15 +04:00
parent 5a53be655c
commit 62bf7f6124
9 changed files with 2399 additions and 1126 deletions
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3
sql/sql_select.cc
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@ -4287,7 +4287,6 @@ best_access_path(JOIN *join,
double tmp;
ha_rows rec;
bool best_uses_jbuf= FALSE;
Item_in_subselect* jtbm_subselect= s->table->pos_in_table_list->jtbm_subselect;
Loose_scan_opt loose_scan_opt;
DBUG_ENTER("best_access_path");
@ -4696,7 +4695,7 @@ best_access_path(JOIN *join,
!((s->table->file->ha_table_flags() & HA_TABLE_SCAN_ON_INDEX) && // (3)
! s->table->covering_keys.is_clear_all() && best_key && !s->quick) &&// (3)
!(s->table->force_index && best_key && !s->quick) && // (4)
!(best_key && jtbm_subselect)) // (5)
!(best_key && s->table->pos_in_table_list->jtbm_subselect)) // (5)
{ // Check full join
ha_rows rnd_records= s->found_records;
/*