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MDEV-452 Add full support for auto-initialized/updated timestamp and datetime

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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.
This commit is contained in:
unknown
2012-10-17 15:43:56 +03:00
parent 620d14f8c3
commit bc4a456758
61 changed files with 5375 additions and 540 deletions
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94
mysql-test/include/function_defaults_notembedded.inc Normal file
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SET TIME_ZONE = "+00:00";
--echo #
--echo # Test of INSERT DELAYED ... SET ...
--echo #
--echo # 2011-04-19 08:02:40 UTC
SET TIMESTAMP = 1303200160.123456;
eval CREATE TABLE t1 ( a INT, b $timestamp NOT NULL DEFAULT CURRENT_$timestamp ON UPDATE CURRENT_$timestamp);
INSERT DELAYED INTO t1 SET a = 1;
FLUSH TABLE t1;
SELECT * FROM t1;
SELECT * FROM t1 WHERE b = 0;
INSERT DELAYED INTO t1 SET a = 2, b = '1980-01-02 10:20:30.405060';
FLUSH TABLE t1;
SELECT * FROM t1;
DROP TABLE t1;
--echo #
--echo # Test of INSERT DELAYED ... VALUES ...
--echo #
--echo # 2011-04-19 08:04:01 UTC
SET TIMESTAMP = 1303200241.234567;
eval CREATE TABLE t1 ( a INT, b $timestamp NOT NULL DEFAULT CURRENT_$timestamp ON UPDATE CURRENT_$timestamp);
INSERT DELAYED INTO t1 ( a ) VALUES (1);
FLUSH TABLE t1;
SELECT * FROM t1;
INSERT DELAYED INTO t1 VALUES (2, '1977-12-19 12:34:56.789123');
FLUSH TABLE t1;
SELECT * FROM t1;
DROP TABLE t1;
--echo #
--echo # Test of a delayed insert handler servicing two insert operations
--echo # with different sets of active defaults.
--echo #
eval CREATE TABLE t1 ( a INT, b $timestamp NOT NULL DEFAULT CURRENT_$timestamp ON UPDATE CURRENT_$timestamp);
--connect(con1, localhost, root,,)
--echo # 2011-04-19 08:04:01 UTC
SET TIMESTAMP = 1303200241.345678;
SET debug_sync = 'before_write_delayed SIGNAL parked WAIT_FOR go';
--send INSERT DELAYED INTO t1 ( a ) VALUES (1), (2), (3)
--connection default
SET debug_sync = 'now WAIT_FOR parked';
--connect(con2, localhost, root,,)
--echo # 2011-04-19 08:04:01 UTC
SET TIME_ZONE="+03:00";
SET TIMESTAMP = 1303200241.456789;
--send INSERT DELAYED INTO t1 ( a, b ) VALUES (4, '1977-12-19 12:34:56.789123'), (5, '1977-12-19 12:34:57.891234'), (6, '1977-12-19 12:34:58.912345')
--connection default
SET debug_sync = 'now SIGNAL go';
--let $wait_condition= SELECT COUNT(*) = 6 FROM t1
--source include/wait_condition.inc
--sorted_result
SELECT * FROM t1;
--disconnect con1
--disconnect con2
DROP TABLE t1;
--echo #
--echo # Test of early activation of function defaults.
--echo #
eval CREATE TABLE t1 ( a INT, b $timestamp NOT NULL DEFAULT CURRENT_$timestamp ON UPDATE CURRENT_$timestamp);
SET TIMESTAMP = 1317235172.987654; # 2011-09-28 18:39:32 UTC
INSERT DELAYED INTO t1 ( a ) VALUES (1), (2), (3);
SET TIMESTAMP = 385503754.876543; # 1982-03-20 20:22:34 UTC
INSERT DELAYED INTO t1 ( a ) VALUES (4), (5), (6);
FLUSH TABLE t1;
SELECT * FROM t1;
DROP TABLE t1;