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AtteanX::API::JoinRotatingPlanner(3pm) | User Contributed Perl Documentation | AtteanX::API::JoinRotatingPlanner(3pm) |
NAME¶
AtteanX::API::JoinRotatingPlanner - Query planning role to produce alternative join plans
VERSION¶
This document describes AtteanX::API::JoinRotatingPlanner version 0.033
DESCRIPTION¶
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).
REQUIRED METHODS¶
- "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 single plan.
BUGS¶
Please report any bugs or feature requests to through the GitHub web interface at <https://github.com/kasei/attean/issues>.
SEE ALSO¶
AUTHOR¶
Gregory Todd Williams "<gwilliams@cpan.org>"
COPYRIGHT¶
Copyright (c) 2014--2022 Gregory Todd Williams. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
2022-10-06 | perl v5.34.0 |