Comments on: Finally, something worked right! http://blog.xcski.com/2006/12/09/finally-something-worked-right Everything I used to bore people on newsgroups and mailing lists with, now in one inconvenient place. Sun, 15 Aug 2010 11:02:36 +0000 hourly 1 http://wordpress.org/?v=3.0.1 By: Ewen McNeill http://blog.xcski.com/2006/12/09/finally-something-worked-right/comment-page-1#comment-13496 Ewen McNeill Sat, 09 Dec 2006 20:48:42 +0000 http://blog.xcski.com/2006/12/09/finally-something-worked-right#comment-13496 I trust you know that MySQL 4.1 is also available in Debian Sarge, as mysql-4.1-* packages. MySQL 4.1 supports some subqueries. Debian Etch appears to be going to ship with MySQL 5.0 from what I recall; MySQL 5.0 has been out for about 12 months, so that may well be what's on your VPS ISP's box. Also IIRC MySQL 4.0 will support "IN ()" queries, so you could possibly do one outer join to pick up the keys to delete and a second one to delete everything with those keys. But maybe it's all just an incentive to convert to PostgreSQL. You can possibly trivially dump and reload via, eg, CSV files using Perl DBI and CSV modules, rather than fighting with MySQL any more than you have to. Ewen I trust you know that MySQL 4.1 is also available in Debian Sarge, as mysql-4.1-* packages. MySQL 4.1 supports some subqueries. Debian Etch appears to be going to ship with MySQL 5.0 from what I recall; MySQL 5.0 has been out for about 12 months, so that may well be what’s on your VPS ISP’s box. Also IIRC MySQL 4.0 will support “IN ()” queries, so you could possibly do one outer join to pick up the keys to delete and a second one to delete everything with those keys.

But maybe it’s all just an incentive to convert to PostgreSQL. You can possibly trivially dump and reload via, eg, CSV files using Perl DBI and CSV modules, rather than fighting with MySQL any more than you have to.

Ewen

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