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Fix added along with a test for a case missed in the patch for MDEV-16751

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This commit is contained in:
Varun Gupta
2018-07-27 11:34:34 +05:30
parent 37dee22d27
commit bd0b368119
4 changed files with 47 additions and 4 deletions
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8
sql/sql_select.cc
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@@ -7445,11 +7445,11 @@ bool JOIN_TAB::keyuse_is_valid_for_access_in_chosen_plan(JOIN *join,
st_select_lex *sjm_sel= emb_sj_nest->sj_subq_pred->unit->first_select();
for (uint i= 0; i < sjm_sel->item_list.elements; i++)
{
DBUG_ASSERT(sjm_sel->ref_pointer_array[i]->type() == Item::FIELD_ITEM);
if (keyuse->val->type() == Item::FIELD_ITEM)
DBUG_ASSERT(sjm_sel->ref_pointer_array[i]->real_item()->type() == Item::FIELD_ITEM);
if (keyuse->val->real_item()->type() == Item::FIELD_ITEM)
{
Field *field = ((Item_field*)sjm_sel->ref_pointer_array[i])->field;
if (field->eq(((Item_field*)keyuse->val)->field))
Field *field = ((Item_field*)sjm_sel->ref_pointer_array[i]->real_item())->field;
if (field->eq(((Item_field*)keyuse->val->real_item())->field))
return true;
}
}