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RDF::REDLAND::QUERYRESULTS(3PM) - Linux man page online | Library functions

Redland RDF Syntax Query Results Class.

Chapter
2018-03-01
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 v5.26.1 2018-03-01 RDF::Redland::QueryResults(3pm)
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