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CREATE TABLE t1 (id int(11) NOT NULL PRIMARY KEY, name varchar(20),
INDEX (name)) charset utf8mb4 ENGINE=InnoDB;
Warnings:
Warning 1681 Integer display width is deprecated and will be removed in a future release.
CREATE TABLE t2 (id int(11) NOT NULL PRIMARY KEY, fkey int(11),
FOREIGN KEY (fkey) REFERENCES t2(id)) ENGINE=InnoDB;
Warnings:
Warning 1681 Integer display width is deprecated and will be removed in a future release.
Warning 1681 Integer display width is deprecated and will be removed in a future release.
INSERT INTO t1 VALUES (1,'A1'),(2,'A2'),(3,'B');
INSERT INTO t2 VALUES (1,1),(2,2),(3,2),(4,3),(5,3);
ANALYZE TABLE t1;
ANALYZE TABLE t2;
EXPLAIN
SELECT COUNT(*) FROM t2 LEFT JOIN t1 ON t2.fkey = t1.id
WHERE t1.name LIKE 'A%';
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range PRIMARY,name name 83 NULL 2 100.00 Using where; Using index
1 SIMPLE t2 NULL ref fkey fkey 5 test.t1.id 1 100.00 Using index
Warnings:
Note 1003 /* select#1 */ select count(0) AS `COUNT(*)` from `test`.`t2` join `test`.`t1` where ((`test`.`t2`.`fkey` = `test`.`t1`.`id`) and (`test`.`t1`.`name` like 'A%'))
EXPLAIN
SELECT COUNT(*) FROM t2 LEFT JOIN t1 ON t2.fkey = t1.id
WHERE t1.name LIKE 'A%' OR FALSE;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range PRIMARY,name name 83 NULL 2 100.00 Using where; Using index
1 SIMPLE t2 NULL ref fkey fkey 5 test.t1.id 1 100.00 Using index
Warnings:
Note 1003 /* select#1 */ select count(0) AS `COUNT(*)` from `test`.`t2` join `test`.`t1` where ((`test`.`t2`.`fkey` = `test`.`t1`.`id`) and (`test`.`t1`.`name` like 'A%'))
DROP TABLE t1,t2;
#
# BUG#58456: Assertion 0 in QUICK_INDEX_MERGE_SELECT::need_sorted_output
# in opt_range.h
#
CREATE TABLE t1 (
col_int INT,
col_int_key INT,
pk INT NOT NULL,
PRIMARY KEY (pk),
KEY col_int_key (col_int_key)
) ENGINE=InnoDB;
INSERT INTO t1 VALUES (NULL,1,1), (6,2,2), (5,3,3), (NULL,4,4);
INSERT INTO t1 VALUES (1,NULL,6), (8,5,7), (NULL,8,8), (8,NULL,5);
ANALYZE TABLE t1;
CREATE TABLE t2 (
pk INT PRIMARY KEY
) ENGINE=InnoDB;
EXPLAIN SELECT t1.pk
FROM t2 LEFT JOIN t1 ON t2.pk = t1.col_int
WHERE t1.col_int_key BETWEEN 5 AND 6
AND t1.pk IS NULL OR t1.pk IN (5)
ORDER BY pk;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL index PRIMARY PRIMARY 4 NULL 1 100.00 Using index
1 SIMPLE t1 NULL const PRIMARY,col_int_key PRIMARY 4 const 1 12.50 Using where
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`pk` AS `pk` from `test`.`t2` join `test`.`t1` where ((`test`.`t1`.`col_int` = `test`.`t2`.`pk`) and (((`test`.`t1`.`col_int_key` between 5 and 6) and (`test`.`t1`.`pk` is null)) or (`test`.`t1`.`pk` = 5))) order by `test`.`t1`.`pk`
SELECT t1.pk
FROM t2 LEFT JOIN t1 ON t2.pk = t1.col_int
WHERE t1.col_int_key BETWEEN 5 AND 6
AND t1.pk IS NULL OR t1.pk IN (5)
ORDER BY pk;
pk
DROP TABLE t1,t2;
# End BUG#58456
#
# Bug #20939184:INNODB: UNLOCK ROW COULD NOT FIND A 2 MODE LOCK ON THE
# RECORD
#
CREATE TABLE t1 (c1 INT, c2 INT, c3 INT, PRIMARY KEY (c1,c2) );
CREATE TABLE t2 (c1 INT, c2 INT, c3 INT, PRIMARY KEY (c1), KEY (c2));
INSERT INTO t1 VALUES (1,2,3),(2,3,4),(3,4,5);
INSERT INTO t2 SELECT * FROM t1;
SET TRANSACTION ISOLATION LEVEL READ COMMITTED;
START TRANSACTION;
SELECT * FROM t1 LEFT JOIN t2 ON t1.c2=t2.c2 AND t2.c1=1 FOR UPDATE;
c1 c2 c3 c1 c2 c3
1 2 3 1 2 3
2 3 4 NULL NULL NULL
3 4 5 NULL NULL NULL
UPDATE t1 LEFT JOIN t2 ON t1.c1 = t2.c2 AND t2.c1 = 3 SET t1.c3 = RAND()*10;
COMMIT;
SET TRANSACTION ISOLATION LEVEL REPEATABLE READ;
DROP TABLE t1,t2;
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