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#
# MDEV-26137 ALTER TABLE IMPORT enhancement
#
# drop t1 before importing t2
CREATE TABLE t1 (a int) ENGINE=InnoDB;
INSERT INTO t1 VALUES(42);
FLUSH TABLES t1 FOR EXPORT;
UNLOCK TABLES;
DROP TABLE t1;
ALTER TABLE t2 IMPORT TABLESPACE;
SHOW CREATE TABLE t2;
Table Create Table
t2 CREATE TABLE `t2` (
`a` int(11) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
SELECT * FROM t2;
a
42
DROP TABLE t2;
# created t2 but did not discard tablespace
CREATE TABLE t1 (a int) ENGINE=InnoDB;
INSERT INTO t1 VALUES(42);
CREATE TABLE t2 LIKE t1;
FLUSH TABLES t1 FOR EXPORT;
UNLOCK TABLES;
DROP TABLE t1;
call mtr.add_suppression("InnoDB: Unable to import tablespace");
ALTER TABLE t2 IMPORT TABLESPACE;
ERROR HY000: Tablespace for table 'test/t2' exists. Please DISCARD the tablespace before IMPORT
SHOW CREATE TABLE t2;
Table Create Table
t2 CREATE TABLE `t2` (
`a` int(11) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
SELECT * FROM t2;
a
DROP TABLE t2;
# attempt to import when there's no tablespace
ALTER TABLE t2 IMPORT TABLESPACE;
ERROR 42S02: Table 'test.t2' doesn't exist
# with index
CREATE TABLE t1 (a int, b varchar(50)) ENGINE=InnoDB;
CREATE UNIQUE INDEX ai ON t1 (a);
INSERT INTO t1 VALUES(42, "hello");
FLUSH TABLES t1 FOR EXPORT;
UNLOCK TABLES;
ALTER TABLE t2 IMPORT TABLESPACE;
SHOW CREATE TABLE t2;
Table Create Table
t2 CREATE TABLE `t2` (
`a` int(11) DEFAULT NULL,
`b` varchar(50) DEFAULT NULL,
UNIQUE KEY `ai` (`a`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
SELECT * FROM t2;
a b
42 hello
SHOW INDEX FROM t1;
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment Index_comment Ignored
t1 0 ai 1 a A 1 NULL NULL YES BTREE NO
SHOW INDEX FROM t2;
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment Index_comment Ignored
t2 0 ai 1 a A 1 NULL NULL YES BTREE NO
DROP TABLE t1, t2;
# with virtual column index
CREATE TABLE t1 (a int, b int as (a * a)) ENGINE=InnoDB;
CREATE UNIQUE INDEX ai ON t1 (b);
INSERT INTO t1 VALUES(42, default);
FLUSH TABLES t1 FOR EXPORT;
UNLOCK TABLES;
ALTER TABLE t2 IMPORT TABLESPACE;
SHOW CREATE TABLE t2;
Table Create Table
t2 CREATE TABLE `t2` (
`a` int(11) DEFAULT NULL,
`b` int(11) GENERATED ALWAYS AS (`a` * `a`) VIRTUAL,
UNIQUE KEY `ai` (`b`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
SELECT * FROM t2;
a b
42 1764
SELECT b FROM t2 USE INDEX (ai);
b
1764
SHOW INDEX FROM t1;
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment Index_comment Ignored
t1 0 ai 1 b A 1 NULL NULL YES BTREE NO
SHOW INDEX FROM t2;
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment Index_comment Ignored
t2 0 ai 1 b A 1 NULL NULL YES BTREE NO
CHECK TABLE t2 EXTENDED;
Table Op Msg_type Msg_text
test.t2 check status OK
DROP TABLE t1, t2;
# with auto_increment
CREATE TABLE t1 (id INT PRIMARY KEY AUTO_INCREMENT, i2 INT, i1 INT)ENGINE=INNODB;
INSERT INTO t1 (i2) SELECT 4 FROM seq_1_to_1024;
FLUSH TABLE t1 FOR EXPORT;
UNLOCK TABLES;
ALTER TABLE t2 IMPORT TABLESPACE;
CHECK TABLE t2 EXTENDED;
Table Op Msg_type Msg_text
test.t2 check status OK
DROP TABLE t2, t1;
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