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MWL#17: Table elimination

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Fixes after post-review fixes:
- Don't search for tables in JOIN_TAB array. it's not initialized yet.
  use select_lex->leaf_tables instead.
This commit is contained in:
Sergey Petrunya 2009-08-13 13:36:13 +04:00
parent b3f18c8866
commit 536754c8c6
1 changed files with 4 additions and 8 deletions
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12
sql/opt_table_elimination.cc
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@ -676,16 +676,12 @@ Outer_join_dep *get_outer_join_dep(Table_elimination *te,
if (!(table_dep= te->table_deps[idx]))
{
TABLE *table= NULL;
/*
Locate and create the table. The search isnt very efficient but
typically we won't get here as we process the ON expression first
and that will create the Table_dep
*/
for (uint i= 0; i < te->join->tables; i++)
for (TABLE_LIST *tlist= te->join->select_lex->leaf_tables; tlist;
tlist=tlist->next_leaf)
{
if (te->join->join_tab[i].table->tablenr == (uint)idx)
if (tlist->table->tablenr == (uint)idx)
{
table= te->join->join_tab[i].table;
table=tlist->table;
break;
}
}