NAME¶
Attean::SimpleQueryEvaluator - Simple query evaluator
VERSION¶
This document describes Attean::SimpleQueryEvaluator version 0.021
SYNOPSIS¶
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 );
DESCRIPTION¶
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.
ATTRIBUTES¶
- "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 {}".
METHODS¶
- "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.
AUTHOR¶
Gregory Todd Williams
"<gwilliams@cpan.org>"
COPYRIGHT¶
Copyright (c) 2014--2018 Gregory Todd Williams. This program is free software;
you can redistribute it and/or modify it under the same terms as Perl itself.