diff options
Diffstat (limited to 'sql/sql_select.cc')
| -rw-r--r-- | sql/sql_select.cc | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/sql/sql_select.cc b/sql/sql_select.cc index a15dd56fa75..b489756c784 100644 --- a/sql/sql_select.cc +++ b/sql/sql_select.cc @@ -1550,6 +1550,9 @@ TODO: make view to decide if it is possible to write to WHERE directly or make S /* Cache constant expressions in WHERE, HAVING, ON clauses. */ cache_const_exprs(); + if (setup_semijoin_loosescan(this)) + DBUG_RETURN(1); + if (make_join_select(this, select, conds)) { zero_result_cause= @@ -5243,6 +5246,8 @@ update_ref_and_keys(THD *thd, DYNAMIC_ARRAY *keyuse,JOIN_TAB *join_tab, KEY_FIELD *key_fields, *end, *field; uint sz; uint m= MY_MAX(select_lex->max_equal_elems,1); + DBUG_ENTER("update_ref_and_keys"); + DBUG_PRINT("enter", ("normal_tables: %llx", normal_tables)); SELECT_LEX *sel=thd->lex->current_select; sel->cond_count= 0; @@ -5289,7 +5294,7 @@ update_ref_and_keys(THD *thd, DYNAMIC_ARRAY *keyuse,JOIN_TAB *join_tab, sz= MY_MAX(sizeof(KEY_FIELD),sizeof(SARGABLE_PARAM))* ((sel->cond_count*2 + sel->between_count)*m+1); if (!(key_fields=(KEY_FIELD*) thd->alloc(sz))) - return TRUE; /* purecov: inspected */ + DBUG_RETURN(TRUE); /* purecov: inspected */ and_level= 0; field= end= key_fields; *sargables= (SARGABLE_PARAM *) key_fields + @@ -5300,7 +5305,7 @@ update_ref_and_keys(THD *thd, DYNAMIC_ARRAY *keyuse,JOIN_TAB *join_tab, if (my_init_dynamic_array2(keyuse, sizeof(KEYUSE), thd->alloc(sizeof(KEYUSE) * 20), 20, 64, MYF(MY_THREAD_SPECIFIC))) - return TRUE; + DBUG_RETURN(TRUE); if (cond) { @@ -5351,16 +5356,16 @@ update_ref_and_keys(THD *thd, DYNAMIC_ARRAY *keyuse,JOIN_TAB *join_tab, for ( ; field != end ; field++) { if (add_key_part(keyuse,field)) - return TRUE; + DBUG_RETURN(TRUE); } if (select_lex->ftfunc_list->elements) { if (add_ft_keys(keyuse,join_tab,cond,normal_tables)) - return TRUE; + DBUG_RETURN(TRUE); } - return FALSE; + DBUG_RETURN(FALSE); } @@ -9778,9 +9783,14 @@ make_join_select(JOIN *join,SQL_SELECT *select,COND *cond) Check again if we should use an index. We could have used an column from a previous table in the index if we are using limit and this is the first table + + (1) - Don't switch the used index if we are using semi-join + LooseScan on this table. Using different index will not + produce the desired ordering and de-duplication. */ if (!tab->table->is_filled_at_execution() && + !tab->loosescan_match_tab && // (1) ((cond && (!tab->keys.is_subset(tab->const_keys) && i > 0)) || (!tab->const_keys.is_clear_all() && i == join->const_tables && join->unit->select_limit_cnt < @@ -21906,7 +21916,7 @@ setup_group(THD *thd, Item **ref_pointer_array, TABLE_LIST *tables, Item_field *field; int cur_pos_in_select_list= 0; List_iterator<Item> li(fields); - List_iterator<Item_field> naf_it(thd->lex->current_select->non_agg_fields); + List_iterator<Item_field> naf_it(thd->lex->current_select->join->non_agg_fields); field= naf_it++; while (field && (item=li++)) |