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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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4
mysql-test/suite/funcs_1/r/is_columns_mysql.result
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@ -59,7 +59,7 @@ def mysql func ret 2 0 NO tinyint NULL NULL 3 0 NULL NULL NULL tinyint(1) sele
def mysql func type 4 NULL NO enum 9 27 NULL NULL NULL utf8 utf8_general_ci enum('function','aggregate') select,insert,update,references
def mysql general_log argument 6 NULL NO mediumtext 16777215 16777215 NULL NULL NULL utf8 utf8_general_ci mediumtext select,insert,update,references
def mysql general_log command_type 5 NULL NO varchar 64 192 NULL NULL NULL utf8 utf8_general_ci varchar(64) select,insert,update,references
def mysql general_log event_time 1 CURRENT_TIMESTAMP NO timestamp NULL NULL NULL NULL 6 NULL NULL timestamp(6) on update CURRENT_TIMESTAMP select,insert,update,references
def mysql general_log event_time 1 CURRENT_TIMESTAMP(6) NO timestamp NULL NULL NULL NULL 6 NULL NULL timestamp(6) on update CURRENT_TIMESTAMP select,insert,update,references
def mysql general_log server_id 4 NULL NO int NULL NULL 10 0 NULL NULL NULL int(10) unsigned select,insert,update,references
def mysql general_log thread_id 3 NULL NO int NULL NULL 10 0 NULL NULL NULL int(11) select,insert,update,references
def mysql general_log user_host 2 NULL NO mediumtext 16777215 16777215 NULL NULL NULL utf8 utf8_general_ci mediumtext select,insert,update,references
@ -159,7 +159,7 @@ def mysql slow_log rows_examined 6 NULL NO int NULL NULL 10 0 NULL NULL NULL int
def mysql slow_log rows_sent 5 NULL NO int NULL NULL 10 0 NULL NULL NULL int(11) select,insert,update,references
def mysql slow_log server_id 10 NULL NO int NULL NULL 10 0 NULL NULL NULL int(10) unsigned select,insert,update,references
def mysql slow_log sql_text 11 NULL NO mediumtext 16777215 16777215 NULL NULL NULL utf8 utf8_general_ci mediumtext select,insert,update,references
def mysql slow_log start_time 1 CURRENT_TIMESTAMP NO timestamp NULL NULL NULL NULL 6 NULL NULL timestamp(6) on update CURRENT_TIMESTAMP select,insert,update,references
def mysql slow_log start_time 1 CURRENT_TIMESTAMP(6) NO timestamp NULL NULL NULL NULL 6 NULL NULL timestamp(6) on update CURRENT_TIMESTAMP select,insert,update,references
def mysql slow_log user_host 2 NULL NO mediumtext 16777215 16777215 NULL NULL NULL utf8 utf8_general_ci mediumtext select,insert,update,references
def mysql tables_priv Column_priv 8 NO set 31 93 NULL NULL NULL utf8 utf8_general_ci set('Select','Insert','Update','References') select,insert,update,references
def mysql tables_priv Db 2 NO char 64 192 NULL NULL NULL utf8 utf8_bin char(64) PRI select,insert,update,references