Attean::API::Plan - Query plan
This document describes Attean::API::Plan version 0.026
The Attean::API::Plan role defines a common API for all query plans.
cost
distinct
item_type
in_scope_variables
ordered
The following methods are required by the Attean::API::Plan role:
impl( $model )
Returns a code reference that when called (without arguments), returns an Attean::API::Iterator object.
has_cost
as_string
Returns a tree-structured string representation of this plan, including children.
evaluate( $model )
Evaluates this plan and returns the resulting iterator.
in_scope_variables_union( @plans )
Returns the set union of in_scope_variables of the given plan objects.
subplans_of_type_are_variable_connected( $type )
Returns true if the subpatterns of the given $type are all connected through their in_scope_variables, false otherwise (implying a cartesian product if the connecting plans perform some form of join.
$type
children_are_variable_connected( $type )
Returns true if the children of this plan are all connected through their in_scope_variables, false otherwise (implying a cartesian product if this plan performs some form of join.
Please report any bugs or feature requests to through the GitHub web interface at https://github.com/kasei/attean/issues.
Gregory Todd Williams <gwilliams@cpan.org>
<gwilliams@cpan.org>
Copyright (c) 2014--2019 Gregory Todd Williams. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
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.