database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-07-30 16:24:05 +03:00
Code Activity

MDEV-18300: ASAN error in Field_blob::get_key_image upon UPDATE with subquery

Browse Source 
For single table updates and multi-table updates , engine independent statistics were not being
read even if the statistics were collected.
Fixed it, so when the optimizer_use_condition_selectivity > 2 then we would read the available
statistics for update queries.
This commit is contained in:
Varun Gupta
2019-04-11 13:05:01 +05:30
parent 812ac2bb85
commit 409dddf695
4 changed files with 57 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
sql/sql_update.cc
View File

@ -301,6 +301,8 @@ int mysql_update(THD *thd,
if (lock_tables(thd, table_list, table_count, 0))
DBUG_RETURN(1);
(void) read_statistics_for_tables_if_needed(thd, table_list);
if (table_list->handle_derived(thd->lex, DT_MERGE_FOR_INSERT))
DBUG_RETURN(1);
if (table_list->handle_derived(thd->lex, DT_PREPARE))
@ -1540,6 +1542,7 @@ int mysql_multi_update_prepare(THD *thd)
{
DBUG_RETURN(TRUE);
}
(void) read_statistics_for_tables_if_needed(thd, table_list);
/* @todo: downgrade the metadata locks here. */
/*