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MDEV-9251: Fix MySQL Bug#20755615: InnoDB compares column names case sensitively,

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while according to Storage Engine API column names should be compared
case insensitively. This can cause FRM and InnoDB data dictionary to
go out of sync.
This commit is contained in:
Jan Lindström
2015-12-11 14:33:41 +02:00
parent fa25921b59
commit c19972fc87
4 changed files with 73 additions and 2 deletions
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40
mysql-test/suite/innodb/r/innodb-dict.result Normal file
View File

@@ -0,0 +1,40 @@
CREATE TABLE t1 (D INT) ENGINE=innodb;
INSERT INTO t1 VALUES (10);
ALTER TABLE t1 MODIFY COLUMN d INT;
ALTER TABLE t1 ADD INDEX my_d (d);
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`d` int(11) DEFAULT NULL,
KEY `my_d` (`d`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
INSERT INTO t1 VALUES (1),(2),(3),(4),(5),(6),(7),(8),(9);
INSERT INTO t1 SELECT * FROM t1;
INSERT INTO t1 SELECT * FROM t1;
INSERT INTO t1 SELECT * FROM t1;
INSERT INTO t1 SELECT * FROM t1;
INSERT INTO t1 SELECT * FROM t1;
INSERT INTO t1 SELECT * FROM t1;
INSERT INTO t1 SELECT * FROM t1;
EXPLAIN SELECT d FROM t1 WHERE d = 5;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref my_d my_d 5 const 128 Using index
EXPLAIN SELECT D FROM t1 WHERE D = 5;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref my_d my_d 5 const 128 Using index
ALTER TABLE t1 DROP INDEX my_d;
ALTER TABLE t1 MODIFY COLUMN D INT;
ALTER TABLE t1 ADD INDEX my_d (D);
EXPLAIN SELECT d FROM t1 WHERE d = 5;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref my_d my_d 5 const 128 Using index
EXPLAIN SELECT D FROM t1 WHERE D = 5;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref my_d my_d 5 const 128 Using index
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`D` int(11) DEFAULT NULL,
KEY `my_d` (`D`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
DROP TABLE t1;