Post-push fixes for the bug #42849:

All tests in the parts suite that use partitioning
on a timezone-dependent expression were commented
out, since it is not valid anymore.

mysql-test/suite/parts/inc/part_blocked_sql_funcs_main.inc

@@ -152,10 +152,16 @@ let $valsqlfunc = timestampdiff(YEAR,'2002-05-01','2001-01-01');
 let $coltype = datetime;
 --source suite/parts/inc/partition_blocked_sql_funcs.inc
 
-let $sqlfunc = unix_timestamp(col1);
-let $valsqlfunc = unix_timestamp ('2002-05-01');
-let $coltype = date;
---source suite/parts/inc/partition_blocked_sql_funcs.inc
+################################################################################
+# After the fix for bug #42849 the server behavior does not fit into this test's
+# architecture: for UNIX_TIMESTAMP() some of the queries in 
+# suite/parts/inc/partition_blocked_sql_funcs.inc will fail with a different
+# error (ER_WRONG_EXPR_IN_PARTITION_FUNC_ERROR) and some will succeed where
+################################################################################
+#let $sqlfunc = unix_timestamp(col1);
+#let $valsqlfunc = unix_timestamp ('2002-05-01');
+#let $coltype = date;
+#--source suite/parts/inc/partition_blocked_sql_funcs.inc
 
 let $sqlfunc = week(col1);
 let $valsqlfunc = week('2002-05-01');

mysql-test/suite/parts/inc/partition_timestamp.inc

@@ -33,42 +33,48 @@ select count(*) from t2;
 select * from t2;
 drop table t2;
 
-eval create table t3 (a timestamp not null, primary key(a)) engine=$engine 
-partition by range (month(a)) subpartition by key (a)
-subpartitions 3 (
-partition quarter1 values less than (4),
-partition quarter2 values less than (7),
-partition quarter3 values less than (10), 
-partition quarter4 values less than (13)
-);
-show create table t3;
-let $count=12;
---echo $count inserts;
-while ($count)
-{
-eval insert into t3 values (date_add('1970-01-01 00:00:00',interval $count-1 month));
-dec $count;
-}
-select count(*) from t3;
-select * from t3;
-drop table t3;
+################################################################################
+# The following 2 tests are no longer valid after bug #42849 has been fixed:
+# it is not possible to use a timezone-dependent (such as month(timestamp_col)
+# or just a timestamp_col in a numeric context) anymore.
+################################################################################
 
-eval create table t4 (a timestamp not null, primary key(a)) engine=$engine 
-partition by list (month(a)) subpartition by key (a)
-subpartitions 3 (
-partition quarter1 values in (0,1,2,3),
-partition quarter2 values in (4,5,6),
-partition quarter3 values in (7,8,9), 
-partition quarter4 values in (10,11,12)
-);
-show create table t4;
-let $count=12;
---echo $count inserts;
-while ($count)
-{
-eval insert into t4 values (date_add('1970-01-01 00:00:00',interval $count-1 month));
-dec $count;
-}
-select count(*) from t4;
-select * from t4;
-drop table t4;
+# eval create table t3 (a timestamp not null, primary key(a)) engine=$engine 
+# partition by range (month(a)) subpartition by key (a)
+# subpartitions 3 (
+# partition quarter1 values less than (4),
+# partition quarter2 values less than (7),
+# partition quarter3 values less than (10), 
+# partition quarter4 values less than (13)
+# );
+# show create table t3;
+# let $count=12;
+# --echo $count inserts;
+# while ($count)
+# {
+# eval insert into t3 values (date_add('1970-01-01 00:00:00',interval $count-1 month));
+# dec $count;
+# }
+# select count(*) from t3;
+# select * from t3;
+# drop table t3;
+
+# eval create table t4 (a timestamp not null, primary key(a)) engine=$engine 
+# partition by list (month(a)) subpartition by key (a)
+# subpartitions 3 (
+# partition quarter1 values in (0,1,2,3),
+# partition quarter2 values in (4,5,6),
+# partition quarter3 values in (7,8,9), 
+# partition quarter4 values in (10,11,12)
+# );
+# show create table t4;
+# let $count=12;
+# --echo $count inserts;
+# while ($count)
+# {
+# eval insert into t4 values (date_add('1970-01-01 00:00:00',interval $count-1 month));
+# dec $count;
+# }
+# select count(*) from t4;
+# select * from t4;
+# drop table t4;

mysql-test/suite/parts/r/part_blocked_sql_func_innodb.result

@@ -2942,104 +2942,6 @@ drop table if exists t44 ;
 drop table if exists t55 ;
 drop table if exists t66 ;
 -------------------------------------------------------------------------
----  unix_timestamp(col1)  in partition with coltype  date
--------------------------------------------------------------------------
-must all fail!
-drop table if exists t1 ;
-drop table if exists t2 ;
-drop table if exists t3 ;
-drop table if exists t4 ;
-drop table if exists t5 ;
-drop table if exists t6 ;
-create table t1 (col1 date) engine='INNODB' 
-partition by range(unix_timestamp(col1)) 
-(partition p0 values less than (15),
-partition p1 values less than (31));
-Got one of the listed errors
-create table t2 (col1 date) engine='INNODB' 
-partition by list(unix_timestamp(col1)) 
-(partition p0 values in (1,2,3,4,5,6,7,8,9,10),
-partition p1 values in (11,12,13,14,15,16,17,18,19,20),
-partition p2 values in (21,22,23,24,25,26,27,28,29,30));
-Got one of the listed errors
-create table t3 (col1 date) engine='INNODB' 
-partition by hash(unix_timestamp(col1));
-Got one of the listed errors
-create table t4 (colint int, col1 date) engine='INNODB' 
-partition by range(colint) 
-subpartition by hash(unix_timestamp(col1)) subpartitions 2 
-(partition p0 values less than (15),
-partition p1 values less than (31));
-Got one of the listed errors
-create table t5 (colint int, col1 date) engine='INNODB' 
-partition by list(colint)
-subpartition by hash(unix_timestamp(col1)) subpartitions 2 
-(partition p0 values in (1,2,3,4,5,6,7,8,9,10),
-partition p1 values in (11,12,13,14,15,16,17,18,19,20),
-partition p2 values in (21,22,23,24,25,26,27,28,29,30));
-Got one of the listed errors
-create table t6 (colint int, col1 date) engine='INNODB' 
-partition by range(colint) 
-(partition p0 values less than (unix_timestamp ('2002-05-01')),
-partition p1 values less than maxvalue);
-Got one of the listed errors
-drop table if exists t11 ;
-drop table if exists t22 ;
-drop table if exists t33 ;
-drop table if exists t44 ;
-drop table if exists t55 ;
-drop table if exists t66 ;
-create table t11 (col1 date) engine='INNODB' ;
-create table t22 (col1 date) engine='INNODB' ;
-create table t33 (col1 date) engine='INNODB' ;
-create table t44 (colint int, col1 date) engine='INNODB' ;
-create table t55 (colint int, col1 date) engine='INNODB' ;
-create table t66 (colint int, col1 date) engine='INNODB' ;
-alter table t11  
-partition by range(unix_timestamp(col1)) 
-(partition p0 values less than (15),
-partition p1 values less than (31));
-Got one of the listed errors
-alter table t22 
-partition by list(unix_timestamp(col1)) 
-(partition p0 values in (1,2,3,4,5,6,7,8,9,10),
-partition p1 values in (11,12,13,14,15,16,17,18,19,20),
-partition p2 values in (21,22,23,24,25,26,27,28,29,30));
-Got one of the listed errors
-alter table t33 
-partition by hash(unix_timestamp(col1));
-Got one of the listed errors
-alter table t44 
-partition by range(colint) 
-subpartition by hash(unix_timestamp(col1)) subpartitions 2 
-(partition p0 values less than (15),
-partition p1 values less than (31));
-Got one of the listed errors
-alter table t55 
-partition by list(colint)
-subpartition by hash(unix_timestamp(col1)) subpartitions 2 
-(partition p0 values in (1,2,3,4,5,6,7,8,9,10),
-partition p1 values in (11,12,13,14,15,16,17,18,19,20),
-partition p2 values in (21,22,23,24,25,26,27,28,29,30));
-Got one of the listed errors
-alter table t66  
-partition by range(colint) 
-(partition p0 values less than (unix_timestamp ('2002-05-01')),
-partition p1 values less than maxvalue);
-Got one of the listed errors
-drop table if exists t1 ;
-drop table if exists t2 ;
-drop table if exists t3 ;
-drop table if exists t4 ;
-drop table if exists t5 ;
-drop table if exists t6 ;
-drop table if exists t11 ;
-drop table if exists t22 ;
-drop table if exists t33 ;
-drop table if exists t44 ;
-drop table if exists t55 ;
-drop table if exists t66 ;
--------------------------------------------------------------------------
 ---  week(col1)  in partition with coltype  datetime
 -------------------------------------------------------------------------
 must all fail!

mysql-test/suite/parts/r/part_blocked_sql_func_myisam.result

@@ -2942,104 +2942,6 @@ drop table if exists t44 ;
 drop table if exists t55 ;
 drop table if exists t66 ;
 -------------------------------------------------------------------------
----  unix_timestamp(col1)  in partition with coltype  date
--------------------------------------------------------------------------
-must all fail!
-drop table if exists t1 ;
-drop table if exists t2 ;
-drop table if exists t3 ;
-drop table if exists t4 ;
-drop table if exists t5 ;
-drop table if exists t6 ;
-create table t1 (col1 date) engine='MYISAM' 
-partition by range(unix_timestamp(col1)) 
-(partition p0 values less than (15),
-partition p1 values less than (31));
-Got one of the listed errors
-create table t2 (col1 date) engine='MYISAM' 
-partition by list(unix_timestamp(col1)) 
-(partition p0 values in (1,2,3,4,5,6,7,8,9,10),
-partition p1 values in (11,12,13,14,15,16,17,18,19,20),
-partition p2 values in (21,22,23,24,25,26,27,28,29,30));
-Got one of the listed errors
-create table t3 (col1 date) engine='MYISAM' 
-partition by hash(unix_timestamp(col1));
-Got one of the listed errors
-create table t4 (colint int, col1 date) engine='MYISAM' 
-partition by range(colint) 
-subpartition by hash(unix_timestamp(col1)) subpartitions 2 
-(partition p0 values less than (15),
-partition p1 values less than (31));
-Got one of the listed errors
-create table t5 (colint int, col1 date) engine='MYISAM' 
-partition by list(colint)
-subpartition by hash(unix_timestamp(col1)) subpartitions 2 
-(partition p0 values in (1,2,3,4,5,6,7,8,9,10),
-partition p1 values in (11,12,13,14,15,16,17,18,19,20),
-partition p2 values in (21,22,23,24,25,26,27,28,29,30));
-Got one of the listed errors
-create table t6 (colint int, col1 date) engine='MYISAM' 
-partition by range(colint) 
-(partition p0 values less than (unix_timestamp ('2002-05-01')),
-partition p1 values less than maxvalue);
-Got one of the listed errors
-drop table if exists t11 ;
-drop table if exists t22 ;
-drop table if exists t33 ;
-drop table if exists t44 ;
-drop table if exists t55 ;
-drop table if exists t66 ;
-create table t11 (col1 date) engine='MYISAM' ;
-create table t22 (col1 date) engine='MYISAM' ;
-create table t33 (col1 date) engine='MYISAM' ;
-create table t44 (colint int, col1 date) engine='MYISAM' ;
-create table t55 (colint int, col1 date) engine='MYISAM' ;
-create table t66 (colint int, col1 date) engine='MYISAM' ;
-alter table t11  
-partition by range(unix_timestamp(col1)) 
-(partition p0 values less than (15),
-partition p1 values less than (31));
-Got one of the listed errors
-alter table t22 
-partition by list(unix_timestamp(col1)) 
-(partition p0 values in (1,2,3,4,5,6,7,8,9,10),
-partition p1 values in (11,12,13,14,15,16,17,18,19,20),
-partition p2 values in (21,22,23,24,25,26,27,28,29,30));
-Got one of the listed errors
-alter table t33 
-partition by hash(unix_timestamp(col1));
-Got one of the listed errors
-alter table t44 
-partition by range(colint) 
-subpartition by hash(unix_timestamp(col1)) subpartitions 2 
-(partition p0 values less than (15),
-partition p1 values less than (31));
-Got one of the listed errors
-alter table t55 
-partition by list(colint)
-subpartition by hash(unix_timestamp(col1)) subpartitions 2 
-(partition p0 values in (1,2,3,4,5,6,7,8,9,10),
-partition p1 values in (11,12,13,14,15,16,17,18,19,20),
-partition p2 values in (21,22,23,24,25,26,27,28,29,30));
-Got one of the listed errors
-alter table t66  
-partition by range(colint) 
-(partition p0 values less than (unix_timestamp ('2002-05-01')),
-partition p1 values less than maxvalue);
-Got one of the listed errors
-drop table if exists t1 ;
-drop table if exists t2 ;
-drop table if exists t3 ;
-drop table if exists t4 ;
-drop table if exists t5 ;
-drop table if exists t6 ;
-drop table if exists t11 ;
-drop table if exists t22 ;
-drop table if exists t33 ;
-drop table if exists t44 ;
-drop table if exists t55 ;
-drop table if exists t66 ;
--------------------------------------------------------------------------
 ---  week(col1)  in partition with coltype  datetime
 -------------------------------------------------------------------------
 must all fail!

mysql-test/suite/parts/r/partition_datetime_innodb.result

@@ -184,114 +184,6 @@ a
 1971-01-01 00:00:58
 1971-01-01 00:00:59
 drop table t2;
-create table t3 (a timestamp not null, primary key(a)) engine='InnoDB' 
-partition by range (month(a)) subpartition by key (a)
-subpartitions 3 (
-partition quarter1 values less than (4),
-partition quarter2 values less than (7),
-partition quarter3 values less than (10), 
-partition quarter4 values less than (13)
-);
-show create table t3;
-Table	Create Table
-t3	CREATE TABLE `t3` (
-  `a` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
-  PRIMARY KEY (`a`)
-) ENGINE=InnoDB DEFAULT CHARSET=latin1
-/*!50100 PARTITION BY RANGE (month(a))
-SUBPARTITION BY KEY (a)
-SUBPARTITIONS 3
-(PARTITION quarter1 VALUES LESS THAN (4) ENGINE = InnoDB,
- PARTITION quarter2 VALUES LESS THAN (7) ENGINE = InnoDB,
- PARTITION quarter3 VALUES LESS THAN (10) ENGINE = InnoDB,
- PARTITION quarter4 VALUES LESS THAN (13) ENGINE = InnoDB) */
-12 inserts;
-insert into t3 values (date_add('1970-01-01 00:00:00',interval 12-1 month));
-insert into t3 values (date_add('1970-01-01 00:00:00',interval 11-1 month));
-insert into t3 values (date_add('1970-01-01 00:00:00',interval 10-1 month));
-insert into t3 values (date_add('1970-01-01 00:00:00',interval 9-1 month));
-insert into t3 values (date_add('1970-01-01 00:00:00',interval 8-1 month));
-insert into t3 values (date_add('1970-01-01 00:00:00',interval 7-1 month));
-insert into t3 values (date_add('1970-01-01 00:00:00',interval 6-1 month));
-insert into t3 values (date_add('1970-01-01 00:00:00',interval 5-1 month));
-insert into t3 values (date_add('1970-01-01 00:00:00',interval 4-1 month));
-insert into t3 values (date_add('1970-01-01 00:00:00',interval 3-1 month));
-insert into t3 values (date_add('1970-01-01 00:00:00',interval 2-1 month));
-insert into t3 values (date_add('1970-01-01 00:00:00',interval 1-1 month));
-Warnings:
-Warning	1264	Out of range value for column 'a' at row 1
-select count(*) from t3;
-count(*)
-12
-select * from t3;
-a
-0000-00-00 00:00:00
-1970-02-01 00:00:00
-1970-03-01 00:00:00
-1970-04-01 00:00:00
-1970-05-01 00:00:00
-1970-06-01 00:00:00
-1970-07-01 00:00:00
-1970-08-01 00:00:00
-1970-09-01 00:00:00
-1970-10-01 00:00:00
-1970-11-01 00:00:00
-1970-12-01 00:00:00
-drop table t3;
-create table t4 (a timestamp not null, primary key(a)) engine='InnoDB' 
-partition by list (month(a)) subpartition by key (a)
-subpartitions 3 (
-partition quarter1 values in (0,1,2,3),
-partition quarter2 values in (4,5,6),
-partition quarter3 values in (7,8,9), 
-partition quarter4 values in (10,11,12)
-);
-show create table t4;
-Table	Create Table
-t4	CREATE TABLE `t4` (
-  `a` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
-  PRIMARY KEY (`a`)
-) ENGINE=InnoDB DEFAULT CHARSET=latin1
-/*!50100 PARTITION BY LIST (month(a))
-SUBPARTITION BY KEY (a)
-SUBPARTITIONS 3
-(PARTITION quarter1 VALUES IN (0,1,2,3) ENGINE = InnoDB,
- PARTITION quarter2 VALUES IN (4,5,6) ENGINE = InnoDB,
- PARTITION quarter3 VALUES IN (7,8,9) ENGINE = InnoDB,
- PARTITION quarter4 VALUES IN (10,11,12) ENGINE = InnoDB) */
-12 inserts;
-insert into t4 values (date_add('1970-01-01 00:00:00',interval 12-1 month));
-insert into t4 values (date_add('1970-01-01 00:00:00',interval 11-1 month));
-insert into t4 values (date_add('1970-01-01 00:00:00',interval 10-1 month));
-insert into t4 values (date_add('1970-01-01 00:00:00',interval 9-1 month));
-insert into t4 values (date_add('1970-01-01 00:00:00',interval 8-1 month));
-insert into t4 values (date_add('1970-01-01 00:00:00',interval 7-1 month));
-insert into t4 values (date_add('1970-01-01 00:00:00',interval 6-1 month));
-insert into t4 values (date_add('1970-01-01 00:00:00',interval 5-1 month));
-insert into t4 values (date_add('1970-01-01 00:00:00',interval 4-1 month));
-insert into t4 values (date_add('1970-01-01 00:00:00',interval 3-1 month));
-insert into t4 values (date_add('1970-01-01 00:00:00',interval 2-1 month));
-insert into t4 values (date_add('1970-01-01 00:00:00',interval 1-1 month));
-Warnings:
-Warning	1264	Out of range value for column 'a' at row 1
-select count(*) from t4;
-count(*)
-12
-select * from t4;
-a
-0000-00-00 00:00:00
-1970-02-01 00:00:00
-1970-03-01 00:00:00
-1970-04-01 00:00:00
-1970-05-01 00:00:00
-1970-06-01 00:00:00
-1970-07-01 00:00:00
-1970-08-01 00:00:00
-1970-09-01 00:00:00
-1970-10-01 00:00:00
-1970-11-01 00:00:00
-1970-12-01 00:00:00
-drop table t4;
 create table t1 (a date not null, primary key(a)) engine='InnoDB' 
 partition by key (a) (
 partition pa1 max_rows=20 min_rows=2,

mysql-test/suite/parts/r/partition_datetime_myisam.result

@@ -184,114 +184,6 @@ a
 1971-01-01 00:00:58
 1971-01-01 00:00:59
 drop table t2;
-create table t3 (a timestamp not null, primary key(a)) engine='MyISAM' 
-partition by range (month(a)) subpartition by key (a)
-subpartitions 3 (
-partition quarter1 values less than (4),
-partition quarter2 values less than (7),
-partition quarter3 values less than (10), 
-partition quarter4 values less than (13)
-);
-show create table t3;
-Table	Create Table
-t3	CREATE TABLE `t3` (
-  `a` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
-  PRIMARY KEY (`a`)
-) ENGINE=MyISAM DEFAULT CHARSET=latin1
-/*!50100 PARTITION BY RANGE (month(a))
-SUBPARTITION BY KEY (a)
-SUBPARTITIONS 3
-(PARTITION quarter1 VALUES LESS THAN (4) ENGINE = MyISAM,
- PARTITION quarter2 VALUES LESS THAN (7) ENGINE = MyISAM,
- PARTITION quarter3 VALUES LESS THAN (10) ENGINE = MyISAM,
- PARTITION quarter4 VALUES LESS THAN (13) ENGINE = MyISAM) */
-12 inserts;
-insert into t3 values (date_add('1970-01-01 00:00:00',interval 12-1 month));
-insert into t3 values (date_add('1970-01-01 00:00:00',interval 11-1 month));
-insert into t3 values (date_add('1970-01-01 00:00:00',interval 10-1 month));
-insert into t3 values (date_add('1970-01-01 00:00:00',interval 9-1 month));
-insert into t3 values (date_add('1970-01-01 00:00:00',interval 8-1 month));
-insert into t3 values (date_add('1970-01-01 00:00:00',interval 7-1 month));
-insert into t3 values (date_add('1970-01-01 00:00:00',interval 6-1 month));
-insert into t3 values (date_add('1970-01-01 00:00:00',interval 5-1 month));
-insert into t3 values (date_add('1970-01-01 00:00:00',interval 4-1 month));
-insert into t3 values (date_add('1970-01-01 00:00:00',interval 3-1 month));
-insert into t3 values (date_add('1970-01-01 00:00:00',interval 2-1 month));
-insert into t3 values (date_add('1970-01-01 00:00:00',interval 1-1 month));
-Warnings:
-Warning	1264	Out of range value for column 'a' at row 1
-select count(*) from t3;
-count(*)
-12
-select * from t3;
-a
-0000-00-00 00:00:00
-1970-02-01 00:00:00
-1970-03-01 00:00:00
-1970-04-01 00:00:00
-1970-05-01 00:00:00
-1970-06-01 00:00:00
-1970-07-01 00:00:00
-1970-08-01 00:00:00
-1970-09-01 00:00:00
-1970-10-01 00:00:00
-1970-11-01 00:00:00
-1970-12-01 00:00:00
-drop table t3;
-create table t4 (a timestamp not null, primary key(a)) engine='MyISAM' 
-partition by list (month(a)) subpartition by key (a)
-subpartitions 3 (
-partition quarter1 values in (0,1,2,3),
-partition quarter2 values in (4,5,6),
-partition quarter3 values in (7,8,9), 
-partition quarter4 values in (10,11,12)
-);
-show create table t4;
-Table	Create Table
-t4	CREATE TABLE `t4` (
-  `a` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
-  PRIMARY KEY (`a`)
-) ENGINE=MyISAM DEFAULT CHARSET=latin1
-/*!50100 PARTITION BY LIST (month(a))
-SUBPARTITION BY KEY (a)
-SUBPARTITIONS 3
-(PARTITION quarter1 VALUES IN (0,1,2,3) ENGINE = MyISAM,
- PARTITION quarter2 VALUES IN (4,5,6) ENGINE = MyISAM,
- PARTITION quarter3 VALUES IN (7,8,9) ENGINE = MyISAM,
- PARTITION quarter4 VALUES IN (10,11,12) ENGINE = MyISAM) */
-12 inserts;
-insert into t4 values (date_add('1970-01-01 00:00:00',interval 12-1 month));
-insert into t4 values (date_add('1970-01-01 00:00:00',interval 11-1 month));
-insert into t4 values (date_add('1970-01-01 00:00:00',interval 10-1 month));
-insert into t4 values (date_add('1970-01-01 00:00:00',interval 9-1 month));
-insert into t4 values (date_add('1970-01-01 00:00:00',interval 8-1 month));
-insert into t4 values (date_add('1970-01-01 00:00:00',interval 7-1 month));
-insert into t4 values (date_add('1970-01-01 00:00:00',interval 6-1 month));
-insert into t4 values (date_add('1970-01-01 00:00:00',interval 5-1 month));
-insert into t4 values (date_add('1970-01-01 00:00:00',interval 4-1 month));
-insert into t4 values (date_add('1970-01-01 00:00:00',interval 3-1 month));
-insert into t4 values (date_add('1970-01-01 00:00:00',interval 2-1 month));
-insert into t4 values (date_add('1970-01-01 00:00:00',interval 1-1 month));
-Warnings:
-Warning	1264	Out of range value for column 'a' at row 1
-select count(*) from t4;
-count(*)
-12
-select * from t4;
-a
-0000-00-00 00:00:00
-1970-02-01 00:00:00
-1970-03-01 00:00:00
-1970-04-01 00:00:00
-1970-05-01 00:00:00
-1970-06-01 00:00:00
-1970-07-01 00:00:00
-1970-08-01 00:00:00
-1970-09-01 00:00:00
-1970-10-01 00:00:00
-1970-11-01 00:00:00
-1970-12-01 00:00:00
-drop table t4;
 create table t1 (a date not null, primary key(a)) engine='MyISAM' 
 partition by key (a) (
 partition pa1 max_rows=20 min_rows=2,