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07ba5560da
Problem: ======= Autoincrement value gives duplicate values because of the following reasons. (1) In InnoDB handler function, current autoincrement value is not changed based on newly set auto_increment_increment or auto_increment_offset variable. (2) Handler function does the rounding logic and changes the current autoincrement value and InnoDB doesn't aware of the change in current autoincrement value. Solution: ======== Fix the problem(1), InnoDB always respect the auto_increment_increment and auto_increment_offset value in case of current autoincrement value. By fixing the problem (2), handler layer won't change any current autoincrement value. Reviewed-by: Jimmy Yang <jimmy.yang@oracle.com> RB: 13748
101 lines
2.7 KiB
Plaintext
101 lines
2.7 KiB
Plaintext
CREATE TABLE t1 (id INT AUTO_INCREMENT PRIMARY KEY)ENGINE=INNODB;
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# SETTING auto_increment_increment IN CONNECTION DEFAULT
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SET AUTO_INCREMENT_INCREMENT = 1;
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INSERT INTO t1 VALUES(NULL);
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SELECT * FROM t1;
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id
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1
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SHOW CREATE TABLE t1;
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Table Create Table
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t1 CREATE TABLE `t1` (
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`id` int(11) NOT NULL AUTO_INCREMENT,
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PRIMARY KEY (`id`)
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) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=latin1
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# SETTING auto_increment_increment IN CONNECTION1
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SET AUTO_INCREMENT_INCREMENT = 2;
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SET DEBUG_SYNC= 'ib_after_row_insert SIGNAL opened WAIT_FOR flushed1';
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INSERT INTO t1 VALUES(NULL);
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connect con1, localhost, root,,;
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SET AUTO_INCREMENT_INCREMENT = 2;
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SET DEBUG_SYNC= 'now WAIT_FOR opened';
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SET DEBUG_SYNC= 'ib_after_row_insert_step SIGNAL flushed1 WAIT_FOR opened1';
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insert into t1 values(NULL);
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connection default;
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SELECT * FROM t1;
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id
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1
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3
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SHOW CREATE TABLE t1;
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Table Create Table
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t1 CREATE TABLE `t1` (
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`id` int(11) NOT NULL AUTO_INCREMENT,
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PRIMARY KEY (`id`)
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) ENGINE=InnoDB AUTO_INCREMENT=7 DEFAULT CHARSET=latin1
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SET DEBUG_SYNC= 'now SIGNAL opened1';
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connection con1;
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SELECT * FROM t1;
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id
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1
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3
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5
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SHOW CREATE TABLE t1;
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Table Create Table
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t1 CREATE TABLE `t1` (
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`id` int(11) NOT NULL AUTO_INCREMENT,
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PRIMARY KEY (`id`)
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) ENGINE=InnoDB AUTO_INCREMENT=7 DEFAULT CHARSET=latin1
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connection default;
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disconnect con1;
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DROP TABLE t1;
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CREATE TABLE t1(id INT AUTO_INCREMENT PRIMARY KEY)ENGINE=INNODB;
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# SETTING auto_increment_increment IN CONNECTION DEFAULT
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SET AUTO_INCREMENT_INCREMENT = 1;
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INSERT INTO t1 VALUES(NULL);
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SELECT * FROM t1;
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id
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1
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SHOW CREATE TABLE t1;
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Table Create Table
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t1 CREATE TABLE `t1` (
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`id` int(11) NOT NULL AUTO_INCREMENT,
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PRIMARY KEY (`id`)
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) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=latin1
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SET DEBUG_SYNC = 'now SIGNAL flushed';
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connect con1, localhost, root,,;
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# SETTING auto_increment_increment in connection1
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SET AUTO_INCREMENT_INCREMENT = 2;
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SET DEBUG_SYNC= 'now WAIT_FOR flushed';
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SET DEBUG_SYNC= 'ib_after_row_insert SIGNAL opened WAIT_FOR flushed1';
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INSERT INTO t1 values(NULL);
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connection default;
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SET DEBUG_SYNC= 'now WAIT_FOR opened';
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SET DEBUG_SYNC= 'ib_after_row_insert_step SIGNAL flushed1 WAIT_FOR opened1';
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INSERT INTO t1 VALUES(NULL);
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connection con1;
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SELECT * FROM t1;
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id
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1
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3
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SHOW CREATE TABLE t1;
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Table Create Table
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t1 CREATE TABLE `t1` (
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`id` int(11) NOT NULL AUTO_INCREMENT,
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PRIMARY KEY (`id`)
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) ENGINE=InnoDB AUTO_INCREMENT=6 DEFAULT CHARSET=latin1
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SET DEBUG_SYNC= 'now SIGNAL opened1';
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disconnect con1;
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connection default;
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SELECT * FROM t1;
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id
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1
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3
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5
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SHOW CREATE TABLE t1;
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Table Create Table
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t1 CREATE TABLE `t1` (
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`id` int(11) NOT NULL AUTO_INCREMENT,
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PRIMARY KEY (`id`)
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) ENGINE=InnoDB AUTO_INCREMENT=6 DEFAULT CHARSET=latin1
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DROP TABLE t1;
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SET DEBUG_SYNC='RESET';
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