On Mon, 22 Feb 2021 14:02:26 +0000 Andrew Beverley wrote: > Dear list, > > In my application, DBIx::Class is generating WHERE clauses using > subqueries. With a lot of rows in the database this performs really > badly in MariaDB [1], so I'm wondering whether there is a way to > get DBIx::Class to produce the equivalent queries by joins or whether > there are any other solutions.
Just to close the loop on this one, it appears to still be an issue with MariaDB (for delete only, select seems to have improved). I ended up doing a query to first get the IDs of the records that need deleting, and then running a delete query to delete them by ID. The best references I found related to this were: https://dba.stackexchange.com/a/104441/141122 https://jira.mariadb.org/browse/MDEV-21012 Andy _______________________________________________ List: http://lists.scsys.co.uk/cgi-bin/mailman/listinfo/dbix-class IRC: irc.perl.org#dbix-class SVN: http://dev.catalyst.perl.org/repos/bast/DBIx-Class/ Searchable Archive: http://www.grokbase.com/group/dbix-class@lists.scsys.co.uk
