diff options
Diffstat (limited to 'sql/sql_select.cc')
| -rw-r--r-- | sql/sql_select.cc | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/sql/sql_select.cc b/sql/sql_select.cc index be5e5be7cb7..cf7f310bbd5 100644 --- a/sql/sql_select.cc +++ b/sql/sql_select.cc @@ -4555,6 +4555,11 @@ sub_select(JOIN *join,JOIN_TAB *join_tab,bool end_of_records) { if ((error=(*join_tab->next_select)(join,join_tab+1,0)) < 0) return error; + /* + Test if this was a SELECT DISTINCT query on a table that + was not in the field list; In this case we can abort if + we found a row, as no new rows can be added to the result. + */ if (not_used_in_distinct && found_records != join->found_records) return 0; } |