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MDEV-17518: Range optimization doesn't use ON expressions from nested outer joins

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Continuation of the fix: Make condition selectivity estimate use the
right estimate, too.
This commit is contained in:
Sergei Petrunia
2018-10-23 13:17:14 +02:00
parent 3b6d903852
commit 14b62b1578
3 changed files with 60 additions and 3 deletions
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8
sql/sql_select.cc
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@ -4951,9 +4951,10 @@ make_join_statistics(JOIN *join, List<TABLE_LIST> &tables_list,
bool impossible_range= FALSE;
ha_rows records= HA_POS_ERROR;
SQL_SELECT *select= 0;
Item **sargable_cond= NULL;
if (!s->const_keys.is_clear_all())
{
Item **sargable_cond= get_sargable_cond(join, s->table);
sargable_cond= get_sargable_cond(join, s->table);
select= make_select(s->table, found_const_table_map,
found_const_table_map,
@ -4978,10 +4979,11 @@ make_join_statistics(JOIN *join, List<TABLE_LIST> &tables_list,
}
if (!impossible_range)
{
if (!sargable_cond)
sargable_cond= get_sargable_cond(join, s->table);
if (join->thd->variables.optimizer_use_condition_selectivity > 1)
calculate_cond_selectivity_for_table(join->thd, s->table,
*s->on_expr_ref ?
s->on_expr_ref : &join->conds);
sargable_cond);
if (s->table->reginfo.impossible_range)
{
impossible_range= TRUE;