NAME

RDF::Query::Algebra::Optional - Algebra class for Optional patterns

VERSION

This document describes RDF::Query::Algebra::Optional version 2.200, released 6 August 2009.

new ( $pattern, $opt_pattern ): Returns a new Optional structure.
construct_args: Returns a list of arguments that, passed to this class' constructor, will produce a clone of this algebra pattern.
pattern: Returns the base pattern (LHS) onto which the optional pattern joins.
optional: Returns the optional pattern (RHS).
sse: Returns the SSE string for this alegbra expression.
as_sparql: Returns the SPARQL string for this alegbra expression.
type: Returns the type of this algebra expression.
referenced_variables: Returns a list of the variable names used in this algebra expression.
definite_variables: Returns a list of the variable names that will be bound after evaluating this algebra expression.
fixup ( $query, $bridge, $base, \%namespaces ): Returns a new pattern that is ready for execution using the given bridge. This method replaces generic node objects with bridge-native objects.

 Gregory Todd Williams <gwilliams@cpan.org>