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POMySQL Autoincrement InnoDB like MyISAM
 

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  1. POMySQL Autoincrement InnoDB like MyISAM
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    <p>MyISAM allows very convenient way to create serials. E.g. In the table primary key is id+seq(-uence)</p> <pre><code>id seq 1 1 insert into table(seq) values(1),(2),(3),(1),(2),(1),(1),(2); 1 2 1 3 2 1 2 2 3 1 4 1 4 2 </code></pre> <p>So logic is when id remains the same untill appears duplicate key, in this case (MyISAM) will increment id.</p> <p>But when I try use it in InnoDB - doesn't work. Is there a workaround (because I need transactions)?</p> <p>Thanks.</p> <p>May be better example from comments to Manual of MySQL Posted by [name withheld] on October 23 2003 8:41pm</p> <pre><code>create table location ( id bigint not null auto_increment, -- "serial" per 4.1 longitude int, latitude int, place int, primary key(id, longitude, latitude, place) ); insert into location (longitude, latitude, place) values (0,0,0), (1,1,1), (2,2,2); select * from foo; +----+-----------+----------+-------+ | id | longitude | latitude | place | +----+-----------+----------+-------+ | 1 | 0 | 0 | 0 | | 2 | 1 | 1 | 1 | | 3 | 2 | 2 | 2 | +----+-----------+----------+-------+ drop table location; create table location ( id bigint not null auto_increment, -- "serial" per 4.1 longitude int, latitude int, place int, primary key(longitude, latitude, place, id) ); insert into location (longitude, latitude, place) values (0,0,0), (1,1,1), (2,2,2), (0,0,0); select * from location order by id; +----+-----------+----------+-------+ | id | longitude | latitude | place | +----+-----------+----------+-------+ | 1 | 0 | 0 | 0 | | 1 | 1 | 1 | 1 | | 1 | 2 | 2 | 2 | | 2 | 0 | 0 | 0 | +----+-----------+----------+-------+ </code></pre>
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    1. USLorenzo Manucci
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    1. COI'm assuming that you're talking about the feature of MyISAM when the primary key is compound. If that's the case, no - such feature isn't available for InnoDB. Workaround - ditch the auto_increment, write your own procedure for calculating the key - basically, a huge hassle.
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      1. USMichael J.V.
 

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