DBIx::SearchBuilder::Unique - Ensure uniqueness of records in a collection
package Foo::Collection; use base 'DBIx::SearchBuilder'; use DBIx::SearchBuilder::Unique; # mixin my $collection = Foo::Collection->New(); $collection->SetupComplicatedJoins; $collection->OrderByMagic; while (my $thing = $collection->Next) { # $thing is going to be distinct }
Currently, DBIx::SearchBuilder makes exceptions for databases which cannot handle both SELECT DISTINCT and ordering in the same statement; it drops the DISTINCT requirement. This, of course, means that you can get the same row twice, which you might not want. If that's the case, use this module as a mix-in, and it will provide you with an AddRecord method which ensures that a record will not appear twice in the same search.
SELECT DISTINCT
DISTINCT
AddRecord
Simon Cozens.
Copyright 2005 Best Practical Solutions, LLC
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
To install DBIx::SearchBuilder, copy and paste the appropriate command in to your terminal.
cpanm
cpanm DBIx::SearchBuilder
CPAN shell
perl -MCPAN -e shell install DBIx::SearchBuilder
For more information on module installation, please visit the detailed CPAN module installation guide.