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MDEV-6849 ON UPDATE CURRENT_TIMESTAMP doesn't always work

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reset default fields not for every modified row, but only once,
at the beginning, as the set of modified fields doesn't change.

exception: INSERT ... ON DUPLICATE KEY UPDATE - the set of fields
does change per row and in that case we reset default fields per row.
This commit is contained in:
Sergei Golubchik
2014-11-13 13:40:11 +01:00
parent 815667086c
commit 6a2c170141
7 changed files with 74 additions and 15 deletions
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46
mysql-test/r/function_defaults.result
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@ -435,18 +435,31 @@ SELECT * FROM t1;
a b c
2011-04-20 09:53:41 2011-04-20 09:53:41 2
#
# Test that ON UPDATE CURRENT_TIMESTAMP works after non-changing UPDATE.
#
# 2011-04-20 09:54:13 UTC
SET TIMESTAMP = 1303293253.794613;
UPDATE t1 SET c = 2, b = '2011-04-20 09:53:41.794613';
SELECT * FROM t1;
a b c
2011-04-20 09:53:41 2011-04-20 09:53:41 2
UPDATE t1 SET c = 3;
SELECT * FROM t1;
a b c
2011-04-20 09:54:13 2011-04-20 09:54:13 3
#
# Test of multiple-table UPDATE for ON UPDATE CURRENT_TIMESTAMP
#
# 2011-04-20 15:06:13 UTC
SET TIMESTAMP = 1303311973.534231;
UPDATE t1 t11, t1 t12 SET t11.c = 2;
SELECT * FROM t1;
a b c
2011-04-20 09:53:41 2011-04-20 09:53:41 2
UPDATE t1 t11, t1 t12 SET t11.c = 3;
SELECT * FROM t1;
a b c
2011-04-20 15:06:13 2011-04-20 15:06:13 3
2011-04-20 09:54:13 2011-04-20 09:54:13 3
UPDATE t1 t11, t1 t12 SET t11.c = 2;
SELECT * FROM t1;
a b c
2011-04-20 15:06:13 2011-04-20 15:06:13 2
DROP TABLE t1;
#
# Test of a multiple-table update where only one table is updated and
@ -1967,18 +1980,31 @@ SELECT * FROM t1;
a b c
2011-04-20 09:53:41.794613 2011-04-20 09:53:41.794613 2
#
# Test that ON UPDATE CURRENT_TIMESTAMP works after non-changing UPDATE.
#
# 2011-04-20 09:54:13 UTC
SET TIMESTAMP = 1303293253.794613;
UPDATE t1 SET c = 2, b = '2011-04-20 09:53:41.794613';
SELECT * FROM t1;
a b c
2011-04-20 09:53:41.794613 2011-04-20 09:53:41.794613 2
UPDATE t1 SET c = 3;
SELECT * FROM t1;
a b c
2011-04-20 09:54:13.794613 2011-04-20 09:54:13.794613 3
#
# Test of multiple-table UPDATE for ON UPDATE CURRENT_TIMESTAMP
#
# 2011-04-20 15:06:13 UTC
SET TIMESTAMP = 1303311973.534231;
UPDATE t1 t11, t1 t12 SET t11.c = 2;
SELECT * FROM t1;
a b c
2011-04-20 09:53:41.794613 2011-04-20 09:53:41.794613 2
UPDATE t1 t11, t1 t12 SET t11.c = 3;
SELECT * FROM t1;
a b c
2011-04-20 15:06:13.534231 2011-04-20 15:06:13.534231 3
2011-04-20 09:54:13.794613 2011-04-20 09:54:13.794613 3
UPDATE t1 t11, t1 t12 SET t11.c = 2;
SELECT * FROM t1;
a b c
2011-04-20 15:06:13.534231 2011-04-20 15:06:13.534231 2
DROP TABLE t1;
#
# Test of a multiple-table update where only one table is updated and