NAME¶
DBIx::Class::SQLMaker::OracleJoins - Pre-ANSI Joins-via-Where-Clause Syntax
PURPOSE¶
This module is used with Oracle < 9.0 due to lack of support for standard
ANSI join syntax.
SYNOPSIS¶
Not intended for use directly; used as the sql_maker_class for schemas and
components.
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.
METHODS¶
- select
- Overrides DBIx::Class::SQLMaker's select() method, which calls
_oracle_joins() to modify the column and table list before calling
next::method().
BUGS¶
Does not support full outer joins (however neither really does DBIC itself)
SEE ALSO¶
- DBIx::Class::Storage::DBI::Oracle::WhereJoins - Storage class using
this
- DBIx::Class::SQLMaker - Parent module
- DBIx::Class - Duh
FURTHER QUESTIONS?¶
Check the list of additional DBIC resources.
COPYRIGHT AND LICENSE¶
This module is free software copyright by the DBIx::Class (DBIC) authors. You
can redistribute it and/or modify it under the same terms as the DBIx::Class
library.