NAME

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

VERSION

This document describes RDF::Query::Algebra::Union version 2.907.

Beyond the methods documented below, this class inherits methods from the RDF::Query::Algebra class.

new ( $left, $right ): Returns a new Union structure.
construct_args: Returns a list of arguments that, passed to this class' constructor, will produce a clone of this algebra pattern.
first: Returns the first pattern (LHS) of the union.
second: Returns the second pattern (RHS) of the union.
patterns: Returns the two patterns belonging to the UNION pattern.
sse: Returns the SSE string for this algebra expression.
as_sparql: Returns the SPARQL string for this algebra expression.
as_hash: Returns the query as a nested set of plain data structures (no objects).
type: Returns the type of this algebra expression.
referenced_variables: Returns a list of the variable names used in this algebra expression.
potentially_bound: Returns a list of the variable names used in this algebra expression that will bind values during execution.
definite_variables: Returns a list of the variable names that will be bound after evaluating this algebra expression.

 Gregory Todd Williams <gwilliams@cpan.org>