database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-07-29 05:21:33 +03:00
Code Activity

Fix for BUG#14920 Ordering aggregated result sets corrupts resultset.

Browse Source 
The cause of the bug was the use of end_write_group instead of end_write
in the case when ORDER BY required a temporary table, which didn't take
into account the fact that loose index scan already computes the result
of MIN/MAX aggregate functions (and performs grouping).

The solution is to call end_write instead of end_write_group and to add
the MIN/MAX functions to the list of regular functions so that their
values are inserted into the temporary table.
This commit is contained in:
timour@mysql.com
2005-11-30 12:52:12 +02:00
parent 519139b63a
commit 999a73ace5
6 changed files with 113 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
sql/sql_select.h
View File

@ -140,6 +140,12 @@ typedef struct st_join_table {
nested_join_map embedding_map;
void cleanup();
inline bool is_using_loose_index_scan()
{
return (select && select->quick &&
(select->quick->get_type() ==
QUICK_SELECT_I::QS_TYPE_GROUP_MIN_MAX));
}
} JOIN_TAB;
enum_nested_loop_state sub_select_cache(JOIN *join, JOIN_TAB *join_tab, bool