database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-07-27 18:02:13 +03:00
Code Activity

MDEV-13723: Server crashes in ha_heap::find_unique_row or Assertion `0' failed in st_select_lex_unit::optimize with INTERSECT

Browse Source 
With INTERSECT/EXCEPT fact that subquery item of IN/ALL/ANY was not assigned value does not mean that temporary table used for calculating unit is empty (records could be deleted).
This commit is contained in:
Oleksandr Byelkin
2017-11-10 11:22:51 +01:00
parent 06a9a366a3
commit 623ed1c204
5 changed files with 31 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
sql/sql_union.cc
View File

@ -1259,11 +1259,11 @@ bool st_select_lex_unit::optimize()
{
item->assigned(0); // We will reinit & rexecute unit
item->reset();
if (table->is_created())
{
table->file->ha_delete_all_rows();
table->file->info(HA_STATUS_VARIABLE);
}
}
if (table->is_created())
{
table->file->ha_delete_all_rows();
table->file->info(HA_STATUS_VARIABLE);
}
/* re-enabling indexes for next subselect iteration */
if (union_distinct && table->file->ha_enable_indexes(HA_KEY_SWITCH_ALL))