Attean::SimpleQueryEvaluator

This document describes Attean::SimpleQueryEvaluator version 0.026

  use v5.14;
  use Attean;
  my $algebra = Attean->get_parser('SPARQL')->parse('SELECT * WHERE { ... }');
  my $active_graph = Attean::IRI->new('http://example.org/');
  my $e = Attean::SimpleQueryEvaluator->new( model => $model );
  my $iter = $e->evaluate( $algebra, $active_graph );

The Attean::SimpleQueryEvaluator class implements a simple query evaluator that, given an Attean::API::Algebra and a Attean::API::Model object, evaluates the query represented by the algebra using data from the model, and returns a query result.

"model"

The Attean::API::Model object used for query evaluation.

"default_graph"

The Attean::API::IRI object representing the default graph in the "model". The default graph will be excluded from enumeration of graph names for query features such as "GRAPH ?g {}".

"evaluate( $algebra, $active_graph )"

Returns an Attean::API::Iterator object with results produced by evaluating the query $algebra against the evaluator's "model", using the supplied $active_graph.

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>"

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.