40 lines
1.9 KiB
Plaintext
40 lines
1.9 KiB
Plaintext
CREATE TABLE t1 (
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a INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
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b varchar(500),
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c varchar(500),
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d varchar(500),
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e varchar(500)) ENGINE = InnoDB TABLESPACE = innodb_system;
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CREATE TABLE t2 (a INT NOT NULL AUTO_INCREMENT PRIMARY KEY) ENGINE = InnoDB;
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INSERT INTO t1(b, c, d, e) VALUES(repeat('0a', 250), repeat('1a', 250), repeat('2a', 250), repeat('3a', 250));
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INSERT INTO t1(b, c, d, e) VALUES(repeat('0b', 250), repeat('1b', 250), repeat('2b', 250), repeat('3b', 250));
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INSERT INTO t1(b, c, d, e) VALUES(repeat('0c', 250), repeat('1c', 250), repeat('2c', 250), repeat('3c', 250));
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INSERT INTO t1(b, c, d, e) VALUES(repeat('0d', 250), repeat('1d', 250), repeat('2d', 250), repeat('3d', 250));
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INSERT INTO t1(b, c, d, e) VALUES(repeat('0e', 250), repeat('1e', 250), repeat('2e', 250), repeat('3e', 250));
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INSERT INTO t1(b, c, d, e) VALUES(repeat('0f', 250), repeat('1f', 250), repeat('2f', 250), repeat('3f', 250));
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INSERT INTO t1(b, c, d, e) VALUES(repeat('0g', 250), repeat('1g', 250), repeat('2g', 250), repeat('3g', 250));
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INSERT INTO t2 VALUES(0), (0), (0);
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# Invoke checkpoint to persist metadata of t2 to DDTableBuffer
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SET @start_global_value = @@global.innodb_log_checkpoint_now;
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set global innodb_log_checkpoint_now=ON;
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SET @@global.innodb_log_checkpoint_now = @start_global_value;
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SET DEBUG_SYNC='delete_metadata_before SIGNAL delete WAIT_FOR insert';
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ALTER TABLE t2 ADD COLUMN b INT, ALGORITHM=INPLACE;
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SET DEBUG_SYNC='now WAIT_FOR delete';
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INSERT INTO t1(b, c, d, e) VALUES(repeat('0a', 250), repeat('1a', 250), repeat('2a', 250), repeat('3a', 250));
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SET DEBUG_SYNC='now SIGNAL insert';
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SET DEBUG_SYNC='RESET';
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SELECT count(*) FROM t1;
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count(*)
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8
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SELECT count(*) FROM t2;
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count(*)
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3
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SHOW CREATE TABLE t2;
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Table Create Table
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t2 CREATE TABLE `t2` (
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`a` int(11) NOT NULL AUTO_INCREMENT,
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`b` int(11) DEFAULT NULL,
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PRIMARY KEY (`a`)
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) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
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DROP TABLE t1, t2;
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