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--source include/have_innodb.inc
--source include/have_debug.inc
--source include/have_debug_sync.inc
--source include/count_sessions.inc
--echo #
--echo # MDEV-26294 Duplicate entries in unique index not detected when
--echo # changing collation with INPLACE algorithm
--echo #
# Detect the duplicate entry after collation change of column
SET NAMES utf8;
CREATE TABLE t1 (
id INT PRIMARY KEY,
msg VARCHAR(100) CHARACTER SET utf8 COLLATE utf8_swedish_ci UNIQUE
) ENGINE=INNODB;
INSERT INTO t1 VALUES (1, 'aaa');
INSERT INTO t1 VALUES (2, 'ååå');
--error ER_DUP_ENTRY
ALTER TABLE t1 MODIFY msg VARCHAR(100) CHARACTER SET utf8 COLLATE utf8_unicode_ci, ALGORITHM=inplace;
DROP TABLE t1;
# PageBulk insert shouldn't fail like records are not in ascending order
CREATE TABLE t1 (
id INT PRIMARY KEY,
msg VARCHAR(100) CHARACTER SET utf8 COLLATE utf8_bin,
id_2 INT not null,
unique index(msg, id_2)
) ENGINE=INNODB;
INSERT INTO t1 VALUES (1, 'aaa', 2);
INSERT INTO t1 VALUES (2, 'AAA', 3);
ALTER TABLE t1 MODIFY msg VARCHAR(100) CHARACTER SET utf8 COLLATE utf8_unicode_ci, ALGORITHM=inplace;
DROP TABLE t1;
# Detect the duplicate entry from concurrent DML
CREATE TABLE t1 (
id INT PRIMARY KEY,
msg VARCHAR(100) CHARACTER SET utf8 COLLATE utf8_bin,
unique index(msg)
) ENGINE=INNODB;
INSERT INTO t1 VALUES (1, 'aaa');
INSERT INTO t1 VALUES (2, 'bbb');
INSERT INTO t1 VALUES (3, 'ccc');
SET DEBUG_SYNC = 'RESET';
SET DEBUG_SYNC = 'row_log_apply_before SIGNAL before_apply WAIT_FOR go_ahead';
--send
ALTER TABLE t1 MODIFY msg VARCHAR(100) CHARACTER SET utf8 COLLATE utf8_unicode_ci, ALGORITHM=NOCOPY;
connect (con1,localhost,root,,);
connection con1;
SET DEBUG_SYNC = 'now WAIT_FOR before_apply';
INSERT INTO t1 VALUES (4, 'AAA');
UPDATE t1 set msg = "ddd" where id = 2;
DELETE FROM t1 WHERE id= 3;
SET DEBUG_SYNC = 'now SIGNAL go_ahead';
SET DEBUG_SYNC = 'RESET';
connection default;
--error ER_DUP_ENTRY
reap;
SELECT * FROM t1;
DROP TABLE t1;
# InnoDB should store the changed collation column into
# change_col_info in index when rollback of alter happens
CREATE TABLE t1 (
id INT PRIMARY KEY,
msg VARCHAR(100) CHARACTER SET utf8 COLLATE utf8_bin,
unique index(msg)
) ENGINE=INNODB;
INSERT INTO t1 VALUES (1, 'aaa');
SET DEBUG_DBUG="+d,create_index_fail";
SET DEBUG_SYNC="innodb_inplace_alter_table_enter SIGNAL con1_go WAIT_FOR alter_signal";
--send
ALTER TABLE t1 MODIFY msg VARCHAR(100) CHARACTER SET utf8 COLLATE utf8_unicode_ci, ALGORITHM=NOCOPY;
connection con1;
SET DEBUG_SYNC="now WAIT_FOR con1_go";
BEGIN;
SELECT * FROM t1;
SET DEBUG_SYNC="now SIGNAL alter_signal";
connection default;
--error ER_DUP_ENTRY
reap;
connection con1;
rollback;
INSERT INTO t1 VALUES(2, 'bbb');
disconnect con1;
connection default;
SET DEBUG_SYNC=reset;
SHOW CREATE TABLE t1;
INSERT INTO t1 VALUES(3, 'ccc');
DROP TABLE t1;
# Inplace Collation change is not supported for virtual column
# and stored column
CREATE TABLE t1(id INT PRIMARY KEY, msg VARCHAR(100),
msg_1 VARCHAR(100) AS (msg) VIRTUAL,
msg_2 VARCHAR(100) AS (msg) STORED,
UNIQUE(msg), UNIQUE(msg_1),
UNIQUE(msg_2))ENGINE=InnoDB;
--error ER_UNSUPPORTED_ACTION_ON_GENERATED_COLUMN
ALTER TABLE t1 MODIFY msg_1 VARCHAR(100) CHARACTER SET utf8
COLLATE utf8_unicode_ci, ALGORITHM=inplace;
--error ER_ALTER_OPERATION_NOT_SUPPORTED_REASON
ALTER TABLE t1 MODIFY msg_2 VARCHAR(100) CHARACTER SET utf8
COLLATE utf8_unicode_ci, ALGORITHM=inplace;
DROP TABLE t1;
--source include/wait_until_count_sessions.inc
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