—

              
HideShow 86 lines of Pod
=for comment POD_DERIVED_INDEX_GENERATED
The following documentation is automatically generated.  Please do not edit
this file, but rather the original, inline with DBIx::Class::SQLMaker::OracleJoins
at lib/DBIx/Class/SQLMaker/OracleJoins.pm
(on the system that originally ran this).
If you do edit this file, and don't want your changes to be removed, make
sure you change the first line.
=cut
=head1 NAME
DBIx::Class::SQLMaker::OracleJoins - Pre-ANSI Joins-via-Where-Clause Syntax
=head1 PURPOSE
This module is used with Oracle < 9.0 due to lack of support for standard
ANSI join syntax.
=head1 SYNOPSIS
Not intended for use directly; used as the sql_maker_class for schemas and components.
=head1 DESCRIPTION
Implements pre-ANSI joins specified in the where clause.  Instead of:
    SELECT x FROM y JOIN z ON y.id = z.id
It will write:
    SELECT x FROM y, z WHERE y.id = z.id
It should properly support left joins, and right joins.  Full outer joins are
not possible due to the fact that Oracle requires the entire query be written
to union the results of a left and right join, and by the time this module is
called to create the where query and table definition part of the sql query,
it's already too late.
=head1 METHODS
=over 4
=item select
Overrides DBIx::Class::SQLMaker's select() method, which calls _oracle_joins()
to modify the column and table list before calling next::method().
=back
=head1 BUGS
Does not support full outer joins (however neither really does DBIC itself)
=head1 SEE ALSO
=over 4
=item L<DBIx::Class::Storage::DBI::Oracle::WhereJoins> - Storage class using this
=item L<DBIx::Class::SQLMaker> - Parent module
=item L<DBIx::Class> - Duh
=back
=head1 INHERITED METHODS
=over 4
=item L<SQL::Abstract>
L<is_literal_value|SQL::Abstract/is_literal_value>, L<is_plain_value|SQL::Abstract/is_plain_value>
=back
=head1 FURTHER QUESTIONS?
Check the list of L<additional DBIC resources|DBIx::Class/GETTING HELP/SUPPORT>.
=head1 COPYRIGHT AND LICENSE
This module is free software L<copyright|DBIx::Class/COPYRIGHT AND LICENSE>
by the L<DBIx::Class (DBIC) authors|DBIx::Class/AUTHORS>. You can
redistribute it and/or modify it under the same terms as the
L<DBIx::Class library|DBIx::Class/COPYRIGHT AND LICENSE>.