diff options
| -rw-r--r-- | sql/sql_union.cc | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/sql/sql_union.cc b/sql/sql_union.cc index ec1abc57a51..e56dd4b476e 100644 --- a/sql/sql_union.cc +++ b/sql/sql_union.cc @@ -361,7 +361,8 @@ int st_select_lex_unit::exec() item->reset(); table->file->delete_all_rows(); } - if (union_distinct && table->file->enable_indexes(HA_KEY_SWITCH_ALL)) + if (union_distinct && table->file->enable_indexes(HA_KEY_SWITCH_ALL) && + !describe) DBUG_RETURN(1); // For sub-selects for (SELECT_LEX *sl= select_cursor; sl; sl= sl->next_select()) { |