RDF::Redland::QueryResults - Redland RDF Syntax Query Results
Class
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.
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 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.
Dave Beckett - http://www.dajobe.org/