The same query returns different results under different outer_join_with_cache:
CREATE TABLE t0(c0 CHAR );
CREATE TABLE t2(c0 CHAR );
INSERT INTO t0 VALUES ( 'a' ), ( '' ), ( '' );
INSERT INTO t2 VALUES ( 'b' ), ( '' );
SET SESSION optimizer_switch = 'outer_join_with_cache=on' ;
SELECT t2.c0 FROM t2 LEFT JOIN t0 ON (4 RLIKE t0.c0); -- {b}, { }
SET SESSION optimizer_switch = 'outer_join_with_cache=off' ;
SELECT t2.c0 FROM t2 LEFT JOIN t0 ON (4 RLIKE t0.c0); -- {b}, { }, { }
Daniel Black
made changes -
2023-09-06 01:57
Field
Original Value
New Value
Description
The same query returns different results under different outer_join_with_cache:
CREATE TABLE t0(c0 CHAR);
CREATE TABLE t2(c0 CHAR);
INSERT INTO t0 VALUES ('a'), (''), ('');
INSERT INTO t2 VALUES ('b'), ('');
SET SESSION optimizer_switch = 'outer_join_with_cache=on';
SELECT t2.c0 FROM t2 LEFT JOIN t0 ON (4 RLIKE t0.c0); -- {b}, {NULL}
SET SESSION optimizer_switch = 'outer_join_with_cache=off';
SELECT t2.c0 FROM t2 LEFT JOIN t0 ON (4 RLIKE t0.c0); -- {b}, {NULL}, {NULL}
The same query returns different results under different outer_join_with_cache:
{code:sql}
CREATE TABLE t0(c0 CHAR);
CREATE TABLE t2(c0 CHAR);
INSERT INTO t0 VALUES ('a'), (''), ('');
INSERT INTO t2 VALUES ('b'), ('');
SET SESSION optimizer_switch = 'outer_join_with_cache=on';
SELECT t2.c0 FROM t2 LEFT JOIN t0 ON (4 RLIKE t0.c0); -- {b}, {NULL}
SET SESSION optimizer_switch = 'outer_join_with_cache=off';
SELECT t2.c0 FROM t2 LEFT JOIN t0 ON (4 RLIKE t0.c0); -- {b}, {NULL}, {NULL}
{code}
Daniel Black
made changes -
2023-09-06 01:58
Affects Version/s
10.4.31
[ 29010
]
Daniel Black
made changes -
2023-09-06 01:58
Fix Version/s
10.4
[ 22408
]
Fix Version/s
11.1
[ 28549
]
Daniel Black
made changes -
2023-09-06 01:58
Status
Open
[ 1
]
Confirmed
[ 10101
]
Jinsheng Ba
made changes -
2023-09-06 01:59
Description
The same query returns different results under different outer_join_with_cache:
{code:sql}
CREATE TABLE t0(c0 CHAR);
CREATE TABLE t2(c0 CHAR);
INSERT INTO t0 VALUES ('a'), (''), ('');
INSERT INTO t2 VALUES ('b'), ('');
SET SESSION optimizer_switch = 'outer_join_with_cache=on';
SELECT t2.c0 FROM t2 LEFT JOIN t0 ON (4 RLIKE t0.c0); -- {b}, {NULL}
SET SESSION optimizer_switch = 'outer_join_with_cache=off';
SELECT t2.c0 FROM t2 LEFT JOIN t0 ON (4 RLIKE t0.c0); -- {b}, {NULL}, {NULL}
{code}
The same query returns different results under different outer_join_with_cache:
{code:sql}
CREATE TABLE t0(c0 CHAR);
CREATE TABLE t2(c0 CHAR);
INSERT INTO t0 VALUES ('a'), (''), ('');
INSERT INTO t2 VALUES ('b'), ('');
SET SESSION optimizer_switch = 'outer_join_with_cache=on';
SELECT t2.c0 FROM t2 LEFT JOIN t0 ON (4 RLIKE t0.c0); -- {b}, { }
SET SESSION optimizer_switch = 'outer_join_with_cache=off';
SELECT t2.c0 FROM t2 LEFT JOIN t0 ON (4 RLIKE t0.c0); -- {b}, { }, { }
{code}
Sergei Golubchik
made changes -
2023-09-06 21:17
Assignee
Sergei Petrunia
[ psergey
]
Julien Fritsch
made changes -
2024-09-10 15:07
Fix Version/s
10.4
[ 22408
]
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10.4-922db0642b6321ece41adb3232c1616812143573
MariaDB [test]> SET STATEMENT optimizer_switch = 'outer_join_with_cache=off' FOR SELECT t2.c0 FROM t2 LEFT JOIN t0 ON (4 RLIKE t0.c0);
+------+
| c0 |
+------+
| b |
| |
| |
+------+
3 rows in set (0.001 sec)
MariaDB [test]> SET STATEMENT optimizer_switch = 'outer_join_with_cache=on' FOR SELECT t2.c0 FROM t2 LEFT JOIN t0 ON (4 RLIKE t0.c0);
+------+
| c0 |
+------+
| b |
| |
+------+
2 rows in set (0.001 sec)
MariaDB [test]> select version();
+-----------------------------------------+
| version() |
+-----------------------------------------+
| 10.4.31-MariaDB-1:10.4.31+maria~ubu2004 |
+-----------------------------------------+
1 row in set (0.000 sec)