--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;