diff options
Diffstat (limited to 'sql/sql_select.cc')
| -rw-r--r-- | sql/sql_select.cc | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/sql/sql_select.cc b/sql/sql_select.cc index b20a2262610..5ec65cdcdb9 100644 --- a/sql/sql_select.cc +++ b/sql/sql_select.cc @@ -27533,8 +27533,11 @@ bool mysql_explain_union(THD *thd, SELECT_LEX_UNIT *unit, select_result *result) if (unit->is_unit_op() || unit->fake_select_lex) { + ulonglong save_options= 0; + if (unit->union_needs_tmp_table() && unit->fake_select_lex) { + save_options= unit->fake_select_lex->options; unit->fake_select_lex->select_number= FAKE_SELECT_LEX_ID; // just for initialization unit->fake_select_lex->type= unit_operation_text[unit->common_op()]; unit->fake_select_lex->options|= SELECT_DESCRIBE; @@ -27545,6 +27548,9 @@ bool mysql_explain_union(THD *thd, SELECT_LEX_UNIT *unit, select_result *result) if (!is_pushed_union) res= unit->exec(); } + + if (unit->union_needs_tmp_table() && unit->fake_select_lex) + unit->fake_select_lex->options= save_options; } else { |