Redland RDF Application Framework - Perl RDF::Redland::QueryResults Class
RDF::Redland::QueryResults - Redland RDF Syntax Querys Class
use RDF::Redland;
...
my $query=new RDF::Redland::Query("rdql", undef, $query_string);
$model->query_as_bindings($query);
while(!$query->finished) {
for (my $i=0; $i < $query->bindings_count(); $i++) {
my $name=$query->result_binding_name($i);
my $value=$query->result_binding_value($i);
# ... do something with the results
}
$query->next_result;
}
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.
There are no public constructors.
- count
- Return the current number of results from the query.
- finished
- Return non-0 if the results have been exhausted.
- binding_name INDEX
- Get the name of the variable binding INDEX in the sequence of variable bindings.
- binding_names
- Get the names of all of the variable bindings in the sequence of variable bindings.
- binding_value INDEX
- Get the value of the variable binding INDEX in the sequence of variable bindings.
- binding_values
- Get the values of all of the variable bindings in the sequence of variable bindings.
- binding_value_by_name NAME
- Get the value of the variable binding NAME in the sequence of variable bindings.
- bindings
- Get the names and values of all of the variable bindings in the sequence of variable bindings as a hash
- bindings_count
- Return the size of the sequence of variable bindings.
- next_result
- Move to the next result in the sequence of variable bindings.
the RDF::Redland::Query manpage
Dave Beckett - http://purl.org/net/dajobe/
Copyright 2000-2004 Dave Beckett, Institute for Learning and Research Technology, University of Bristol