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Add Partition with Subpartitions
Posted by: Mike Gent
Date: July 27, 2006 09:49AM

I have a table that I can add and delete partitions:

CREATE TABLE `AH1` (
`ID` bigint(20) unsigned NOT NULL,
`Summary` text NOT NULL,
`Reported` int(10) unsigned NOT NULL
) ENGINE=ARCHIVE DEFAULT CHARSET=latin1
PARTITION BY RANGE (TO_DAYS(FROM_UNIXTIME(Reported)))
(
PARTITION p20060701 VALUES LESS THAN (TO_DAYS('2006-07-02 00:00:00')),
PARTITION p20060702 VALUES LESS THAN (TO_DAYS('2006-07-03 00:00:00')),
PARTITION p20060703 VALUES LESS THAN (TO_DAYS('2006-07-04 00:00:00')),
PARTITION p20060704 VALUES LESS THAN (TO_DAYS('2006-07-05 00:00:00'))
);

Both the add and delete functions work as expected:

ALTER TABLE AH1 DROP PARTITION p20060701;
ALTER TABLE AH1 ADD PARTITION (PARTITION p20060705 VALUES LESS THAN (TO_DAYS('2006-07-06 00:00:00')));

If I have another table partitioned the same, but also includes subpartitions:

CREATE TABLE `AH2` (
`ID` bigint(20) unsigned NOT NULL,
`Summary` text NOT NULL,
`Reported` int(10) unsigned NOT NULL
) ENGINE=ARCHIVE DEFAULT CHARSET=latin1
PARTITION BY RANGE (TO_DAYS(FROM_UNIXTIME(Reported)))
SUBPARTITION BY KEY (ID)
SUBPARTITIONS 5 (
PARTITION p20060701 VALUES LESS THAN (TO_DAYS('2006-07-02 00:00:00')),
PARTITION p20060702 VALUES LESS THAN (TO_DAYS('2006-07-03 00:00:00')),
PARTITION p20060703 VALUES LESS THAN (TO_DAYS('2006-07-04 00:00:00')),
PARTITION p20060704 VALUES LESS THAN (TO_DAYS('2006-07-05 00:00:00'))
);

Deleting a partition works:

ALTER TABLE AH2 DROP PARTITION p20060701;

Adding a new partition crashes MySQL:

ALTER TABLE AH2 ADD PARTITION (PARTITION p20060705 VALUES LESS THAN (TO_DAYS('2006-07-06 00:00:00')));


This is definately a bug in that the database crashes, but I need to know if this is still the correct syntax. Running 5.1.11 on Windows.

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Add Partition with Subpartitions
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July 27, 2006 09:49AM


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