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MDEV-452 Add full support for auto-initialized/updated timestamp and datetime
Generalized support for auto-updated and/or auto-initialized timestamp and datetime columns. This patch is a reimplementation of MySQL's "WL#5874: CURRENT_TIMESTAMP as DEFAULT for DATETIME columns". In order to ease future merges, this implementation reused few function and variable names from MySQL's patch, however the implementation is quite different. TODO: The only unresolved problem in this patch is the semantics of LOAD DATA for TIMESTAMP and DATETIME columns in the cases when there are missing or NULL columns. I couldn't fully comprehend the logic behind MySQL's behavior and its relationship with their own documentation, so I left the results to be more consistent with all other LOAD cases. The problematic test cases can be seen by running the test file function_defaults, and observing the test case differences. Those were left on purpose for discussion.
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132
mysql-test/suite/rpl/r/rpl_function_defaults.result
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132
mysql-test/suite/rpl/r/rpl_function_defaults.result
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#
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# Test of function defaults on replicated tables.
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#
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include/master-slave.inc
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[connection master]
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connection master
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SET TIME_ZONE="+10:30";
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SET TIMESTAMP=123456.789123;
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SELECT CURRENT_TIMESTAMP;
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CURRENT_TIMESTAMP
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1970-01-02 20:47:36
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connection slave
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SET TIME_ZONE="+00:00";
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SET TIMESTAMP=987654321.123456;
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SELECT CURRENT_TIMESTAMP;
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CURRENT_TIMESTAMP
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2001-04-19 04:25:21
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connection master
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CREATE TABLE t1 (
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a TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
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b TIMESTAMP(1) NOT NULL DEFAULT CURRENT_TIMESTAMP(1),
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c TIMESTAMP(2) NOT NULL DEFAULT CURRENT_TIMESTAMP(2),
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d TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
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e TIMESTAMP(4) NOT NULL DEFAULT CURRENT_TIMESTAMP(4),
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f TIMESTAMP(5) NOT NULL DEFAULT CURRENT_TIMESTAMP(5),
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g TIMESTAMP(6) NOT NULL DEFAULT CURRENT_TIMESTAMP(6),
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h DATETIME DEFAULT CURRENT_TIMESTAMP,
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i DATETIME(1) DEFAULT CURRENT_TIMESTAMP(1),
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j DATETIME(2) DEFAULT CURRENT_TIMESTAMP(2),
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k DATETIME(3) DEFAULT CURRENT_TIMESTAMP(3),
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l DATETIME(4) DEFAULT CURRENT_TIMESTAMP(4),
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m DATETIME(5) DEFAULT CURRENT_TIMESTAMP(5),
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n DATETIME(6) DEFAULT CURRENT_TIMESTAMP(6),
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o INT
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);
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INSERT INTO t1 ( o ) VALUES ( 1 );
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CREATE TABLE t2 (
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a TIMESTAMP NOT NULL DEFAULT '0000-00-00 00:00:00' ON UPDATE CURRENT_TIMESTAMP,
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b TIMESTAMP(1) NOT NULL DEFAULT '0000-00-00 00:00:00' ON UPDATE CURRENT_TIMESTAMP(1),
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c TIMESTAMP(2) NOT NULL DEFAULT '0000-00-00 00:00:00' ON UPDATE CURRENT_TIMESTAMP(2),
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d TIMESTAMP(3) NOT NULL DEFAULT '0000-00-00 00:00:00' ON UPDATE CURRENT_TIMESTAMP(3),
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e TIMESTAMP(4) NOT NULL DEFAULT '0000-00-00 00:00:00' ON UPDATE CURRENT_TIMESTAMP(4),
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f TIMESTAMP(5) NOT NULL DEFAULT '0000-00-00 00:00:00' ON UPDATE CURRENT_TIMESTAMP(5),
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g TIMESTAMP(6) NOT NULL DEFAULT '0000-00-00 00:00:00' ON UPDATE CURRENT_TIMESTAMP(6),
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h DATETIME ON UPDATE CURRENT_TIMESTAMP,
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i DATETIME(1) ON UPDATE CURRENT_TIMESTAMP(1),
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j DATETIME(2) ON UPDATE CURRENT_TIMESTAMP(2),
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k DATETIME(3) ON UPDATE CURRENT_TIMESTAMP(3),
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l DATETIME(4) ON UPDATE CURRENT_TIMESTAMP(4),
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m DATETIME(5) ON UPDATE CURRENT_TIMESTAMP(5),
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n DATETIME(6) ON UPDATE CURRENT_TIMESTAMP(6),
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o INT
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);
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INSERT INTO t2 ( o ) VALUES ( 1 );
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sync_slave_with_master
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connection slave
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SELECT * FROM t1;
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a 1970-01-02 10:17:36
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b 1970-01-02 10:17:36.7
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c 1970-01-02 10:17:36.78
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d 1970-01-02 10:17:36.789
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e 1970-01-02 10:17:36.7891
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f 1970-01-02 10:17:36.78912
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g 1970-01-02 10:17:36.789123
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h 1970-01-02 20:47:36
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i 1970-01-02 20:47:36.7
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j 1970-01-02 20:47:36.78
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k 1970-01-02 20:47:36.789
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l 1970-01-02 20:47:36.7891
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m 1970-01-02 20:47:36.78912
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n 1970-01-02 20:47:36.789123
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o 1
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SELECT * FROM t2;
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a 0000-00-00 00:00:00
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b 0000-00-00 00:00:00.0
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c 0000-00-00 00:00:00.00
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d 0000-00-00 00:00:00.000
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e 0000-00-00 00:00:00.0000
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f 0000-00-00 00:00:00.00000
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g 0000-00-00 00:00:00.000000
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h NULL
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i NULL
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j NULL
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k NULL
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l NULL
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m NULL
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n NULL
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o 1
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connection master
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SET TIMESTAMP=1234567890.123456;
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SELECT CURRENT_TIMESTAMP;
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CURRENT_TIMESTAMP
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2009-02-14 10:01:30
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UPDATE t1 SET o = 2;
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UPDATE t2 SET o = 2;
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sync_slave_with_master
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connection slave
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SELECT * FROM t1;
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a 1970-01-02 10:17:36
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b 1970-01-02 10:17:36.7
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c 1970-01-02 10:17:36.78
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d 1970-01-02 10:17:36.789
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e 1970-01-02 10:17:36.7891
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f 1970-01-02 10:17:36.78912
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g 1970-01-02 10:17:36.789123
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h 1970-01-02 20:47:36
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i 1970-01-02 20:47:36.7
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j 1970-01-02 20:47:36.78
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k 1970-01-02 20:47:36.789
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l 1970-01-02 20:47:36.7891
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m 1970-01-02 20:47:36.78912
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n 1970-01-02 20:47:36.789123
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o 2
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SELECT * FROM t2;
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a 2009-02-13 23:31:30
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b 2009-02-13 23:31:30.1
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c 2009-02-13 23:31:30.12
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d 2009-02-13 23:31:30.123
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e 2009-02-13 23:31:30.1234
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f 2009-02-13 23:31:30.12345
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g 2009-02-13 23:31:30.123456
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h 2009-02-14 10:01:30
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i 2009-02-14 10:01:30.1
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j 2009-02-14 10:01:30.12
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k 2009-02-14 10:01:30.123
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l 2009-02-14 10:01:30.1234
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m 2009-02-14 10:01:30.12345
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n 2009-02-14 10:01:30.123456
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o 2
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connection master
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DROP TABLE t1, t2;
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include/rpl_end.inc
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