NAME

AtteanX::API::JoinRotatingPlanner - Query planning role to produce alternative join plans

VERSION

This document describes AtteanX::API::JoinRotatingPlanner version 0.027

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.

AUTHOR

Gregory Todd Williams <gwilliams@cpan.org>

COPYRIGHT

To install Attean, copy and paste the appropriate command in to your terminal.

cpanm

cpanm Attean

CPAN shell

perl -MCPAN -e shell
install Attean

For more information on module installation, please visit the detailed CPAN module installation guide.

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