AtteanX::API::JoinRotatingPlanner - Query planning role to produce alternative
This document describes AtteanX::API::JoinRotatingPlanner version 0.017
The AtteanX::API::JoinRotatingPlanner role, when used with Attean::QueryPlanner,
produces alternatives for join query plans. Specifically, joins of the form
(A⋈B)⋈C are rotated to A⋈(B⋈C), with the ability
to coalesce B⋈C (e.g. for adjacent BGPs).
- "allow_join_rotation( $join_plan )"
- Returns true if join rotation should be attempted on the
given join plan.
- "coalesce_rotated_join( $join_plan )"
- Given a Attean::API::Plan::Join plan $join_plan, returns a
list of equivalent plans. This is useful when the join can be reduced to a
more fundamental plan type, such as merging two adjacent BGP plans into a
Please report any bugs or feature requests to through the GitHub web interface
Gregory Todd Williams "<firstname.lastname@example.org>"
Copyright (c) 2014--2016 Gregory Todd Williams. This program is free software;
you can redistribute it and/or modify it under the same terms as Perl