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MDEV-10880: Assertions keypart_map' or prebuilt->search_tuple->n_fields > 0' fail on DISTINCT and GROUP BY constant

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add_group_and_distinct_keys() should take into account JOIN::simple_group.
This commit is contained in:
Oleksandr Byelkin
2017-06-20 14:55:30 +02:00
parent f65d6a03f0
commit b76b69cd5f
9 changed files with 65 additions and 37 deletions
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sql/sql_select.cc
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@ -5708,7 +5708,7 @@ add_group_and_distinct_keys(JOIN *join, JOIN_TAB *join_tab)
Item_field *cur_item;
key_map possible_keys(0);
if (join->group_list)
if (join->group_list || join->simple_group)
{ /* Collect all query fields referenced in the GROUP clause. */
for (cur_group= join->group_list; cur_group; cur_group= cur_group->next)
(*cur_group->item)->walk(&Item::collect_item_field_processor, 0,