RDF::Redland::QueryResults(3pm) - phpMan

RDF::Redland::QueryResults(3pm)User Contributed Perl DocumentationRDF::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/

perl v5.30.0                                2020-03-02            RDF::Redland::QueryResults(3pm)

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