phpman > perldoc > RDF::Redland::QueryResults(3pm)

NAME
    RDF::Redland::QueryResults - Redland RDF Syntax Query Results Class

SYNOPSIS
      use RDF::Redland;

      ...
      my $query=new RDF::Redland::Query("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.

DESCRIPTION
    This class represents queries of various syntaxes over an RDF::Redland::Model returning a
    sequence of results that bind variable names to RDF::Redland::Node 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 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

AUTHOR
    Dave Beckett - http://www.dajobe.org/