# RDF::Redland::QueryResults - perldoc - [phpMan]

## NAME
    [RDF::Redland::QueryResults](https://www.chedong.com/phpMan.php/perldoc/RDF%3A%3ARedland%3A%3AQueryResults/markdown) - Redland RDF Syntax Query Results Class

## SYNOPSIS
      use [RDF::Redland](https://www.chedong.com/phpMan.php/perldoc/RDF%3A%3ARedland/markdown);

      ...
      my $query=new [RDF::Redland::Query](https://www.chedong.com/phpMan.php/perldoc/RDF%3A%3ARedland%3A%3AQuery/markdown)("query string", undef, undef, "sparql");
      my $results=$model->query_execute($query);
      # or my $results=$query->execute($model);
      while(!$results->finished) {
        for (my $i=0; $i < $results->bindings_count(); $i++) {
          my $name=$results->binding_name($i);
          my $value=$results->binding_value($i);
          # ... do something with the results
        }
        $results->next_result;
      }

    The $results in the example is an object of class [RDF::Redland::QueryResults](https://www.chedong.com/phpMan.php/perldoc/RDF%3A%3ARedland%3A%3AQueryResults/markdown).

## DESCRIPTION
    This class represents queries of various syntaxes over an [RDF::Redland::Model](https://www.chedong.com/phpMan.php/perldoc/RDF%3A%3ARedland%3A%3AModel/markdown) returning a
    sequence of results that bind variable names to [RDF::Redland::Node](https://www.chedong.com/phpMan.php/perldoc/RDF%3A%3ARedland%3A%3ANode/markdown) values.

## CONSTRUCTOR
    There are no public constructors.

## METHODS
    count
        Return the number of current results from the query.

    finished
        Return non-0 if the results have been exhausted.

    binding_name INDEX
        Get the name of variable binding *INDEX* in the array of variable names.

    binding_names
        Get the names all of the variable bindings as an array.

    binding_value INDEX
        Get the value of the variable binding *INDEX* in the current query result.

    binding_values
        Get the values of all of the variable bindings in the current query result.

    binding_value_by_name NAME
        Get the value of the variable binding *NAME* in the current query result.

    bindings
        Get the variable names and values of the current query result as a hash

    bindings_count
        Return the number of variable bindings.

    next_result
        Move to the next query result.

    as_stream
        Return a new [RDF::Redland::Stream](https://www.chedong.com/phpMan.php/perldoc/RDF%3A%3ARedland%3A%3AStream/markdown) object representing the query results as an RDF Graph.

    to_string [FORMAT-URI [BASE-URI]]
        Serialize to a string syntax in format *FORMAT-URI* using the optional *BASE-URI*. The
        default format when none is given is determined by librdf_query_results_to_string.

    is_bindings
        Return non-0 if the query results format is variable bindings

    is_boolean
        Return non-0 if the query results format is a boolean

    is_graph
        Return non-0 if the query results format is an RDF graph

    get_boolean
        Get the boolean query result; non-0 is true.

## SEE ALSO
    [RDF::Redland::Query](https://www.chedong.com/phpMan.php/perldoc/RDF%3A%3ARedland%3A%3AQuery/markdown)

## AUTHOR
    Dave Beckett - <http://www.dajobe.org/>