MySQL Partitioning Unique Key -


i following article:

http://www.chrismoos.com/2010/01/31/mysql-partitioning-tables-with-millions-of-rows

but when run query partition product table (that contains 500,000 rows) error:

#1503 - unique index must include columns in table's partitioning function

my query is:

alter table parts_library partition hash(manufacturerid) partitions 200

my primary key compound key of id , manufacturerid, same in article, don't understand why getting error.

here create statement table:

create table if not exists `parts_library` (   `id` int(11) not null,   `dateadded` timestamp not null default current_timestamp on update current_timestamp,   `typeid` int(3) not null comment 'reference part_types',   `manufacturerid` int(11) not null default '0',   `familyid` int(11) not null default '454',   `partnumber` varchar(255) collate utf8_unicode_ci not null comment 'e.g. 6es5123b62',   `idealform` varchar(255) collate utf8_unicode_ci not null comment 'e.g. 6es5-123-b6/2',   `comcodeid` int(11) default null,   `countryoriginid` int(3) not null default '258',   `minstocklevel` int(11) default null,   `weight` decimal(11,2) default null,   `width` decimal(11,2) default null,   `height` decimal(11,2) default null,   `depth` decimal(11,2) default null,   `validated` tinyint(1) not null default '0',   `onweb` tinyint(1) default '0',   `indexed` tinyint(1) not null default '1',   `averagemargin` decimal(11,2) not null,   primary key (`id`,`manufacturerid`),   unique key `partnumber` (`partnumber`),   key `fk_parts_library_parts_categories1` (`typeid`),   key `fk_parts_library_manufacturers1` (`manufacturerid`),   key `fk_parts_library_geo_countries1` (`countryoriginid`),   key `fk_parts_library_parts_families1` (`familyid`),   key `indexed` (`indexed`) ) engine=innodb default charset=utf8 collate=utf8_unicode_ci;

how can partition table?

the difference bewteen code , arcticle - have

unique key 'partnumber' ('partnumber')

which not mentioned in article. db complains need include column used partitioning key definition like:

unique key 'partnumber' ('manufacturerid','partnumber')


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