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.IX Title "RDF::Redland::QueryResults 3pm"
.TH RDF::Redland::QueryResults 3pm "2020-11-09" "perl v5.32.0" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.nh
.SH "NAME"
RDF::Redland::QueryResults \- Redland RDF Syntax Query Results Class
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&  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
\&    }
\&    $results\->next_result;
\&  }
.Ve
.PP
The \f(CW$results\fR in the example is an object of class RDF::Redland::QueryResults.
.SH "DESCRIPTION"
.IX Header "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.
.SH "CONSTRUCTOR"
.IX Header "CONSTRUCTOR"
There are no public constructors.
.SH "METHODS"
.IX Header "METHODS"
.IP "count" 4
.IX Item "count"
Return the number of current results from the query.
.IP "finished" 4
.IX Item "finished"
Return non\-0 if the results have been exhausted.
.IP "binding_name \s-1INDEX\s0" 4
.IX Item "binding_name INDEX"
Get the name of variable binding \fI\s-1INDEX\s0\fR in the array of variable names.
.IP "binding_names" 4
.IX Item "binding_names"
Get the names all of the variable bindings as an array.
.IP "binding_value \s-1INDEX\s0" 4
.IX Item "binding_value INDEX"
Get the value of the variable binding \fI\s-1INDEX\s0\fR in the current query result.
.IP "binding_values" 4
.IX Item "binding_values"
Get the values of all of the variable bindings in the current query result.
.IP "binding_value_by_name \s-1NAME\s0" 4
.IX Item "binding_value_by_name NAME"
Get the value of the variable binding \fI\s-1NAME\s0\fR in the current query result.
.IP "bindings" 4
.IX Item "bindings"
Get the variable names and values of the current query result as a hash
.IP "bindings_count" 4
.IX Item "bindings_count"
Return the number of variable bindings.
.IP "next_result" 4
.IX Item "next_result"
Move to the next query result.
.IP "as_stream" 4
.IX Item "as_stream"
Return a new RDF::Redland::Stream object representing the query results
as an \s-1RDF\s0 Graph.
.IP "to_string [\s-1FORMAT\-URI\s0 [\s-1BASE\-URI\s0]]" 4
.IX Item "to_string [FORMAT-URI [BASE-URI]]"
Serialize to a string syntax in format \fIFORMAT-URI\fR using the optional
\&\fIBASE-URI\fR.  The default format when none is given is determined by
librdf_query_results_to_string.
.IP "is_bindings" 4
.IX Item "is_bindings"
Return non\-0 if the query results format is variable bindings
.IP "is_boolean" 4
.IX Item "is_boolean"
Return non\-0 if the query results format is a boolean
.IP "is_graph" 4
.IX Item "is_graph"
Return non\-0 if the query results format is an \s-1RDF\s0 graph
.IP "get_boolean" 4
.IX Item "get_boolean"
Get the boolean query result; non\-0 is true.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
RDF::Redland::Query
.SH "AUTHOR"
.IX Header "AUTHOR"
Dave Beckett \- http://www.dajobe.org/