database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-09-02 09:41:40 +03:00
Code Activity

Bug #46607: Assertion failed: (cond_type == Item::FUNC_ITEM)

Browse Source 
results in server crash 
 
check_group_min_max_predicates() assumed the input condition 
item to be one of COND_ITEM, SUBSELECT_ITEM, or FUNC_ITEM. 
Since a condition of the form "field" is also a valid condition 
equivalent to "field <> 0", using such a condition in a query 
where the loose index scan was chosen resulted in a debug 
assertion failure. 
 
Fixed by handling conditions of the FIELD_ITEM type in 
check_group_min_max_predicates().
This commit is contained in:
Alexey Kopytov
2009-08-30 11:03:37 +04:00
parent 502eb9843e
commit 62b95b90df
3 changed files with 38 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
mysql-test/r/group_min_max.result
View File

@@ -2502,3 +2502,15 @@ a MAX(b)
2 1
DROP TABLE t;
End of 5.0 tests
#
# Bug #46607: Assertion failed: (cond_type == Item::FUNC_ITEM) results in
# server crash
#
CREATE TABLE t (a INT, b INT, INDEX (a,b));
INSERT INTO t VALUES (2,0), (2,0), (2,1), (2,1);
INSERT INTO t SELECT * FROM t;
SELECT a, MAX(b) FROM t WHERE b GROUP BY a;
a MAX(b)
2 1
DROP TABLE t;
End of 5.1 tests