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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
commit c19972fc87
4 changed files with 73 additions and 2 deletions
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31
mysql-test/suite/innodb/t/innodb-dict.test Normal file
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--source include/have_innodb.inc
#
# Fix MySQL Bug#20755615: InnoDB compares column names case sensitively,
# 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:
#
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;
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;
EXPLAIN SELECT D FROM t1 WHERE D = 5;
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;
EXPLAIN SELECT D FROM t1 WHERE D = 5;
SHOW CREATE TABLE t1;
DROP TABLE t1;