NAME

RDF::Query::Expression - Class for Expr expressions

VERSION

This document describes RDF::Query::Expression version 2.918.

METHODS

new ( $op, @operands )

Returns a new Expr structure.

construct_args

Returns a list of arguments that, passed to this class' constructor, will produce a clone of this algebra pattern.

op

Returns the operator of the expression.

operands

Returns a list of the operands of the expression.

sse

Returns the SSE string for this algebra expression.

explain

Returns a string serialization of the expression appropriate for display on the command line. This method is primarily used by the explain method of the subclasses of RDF::Query::Plan.

as_hash

Returns the expression 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.

nonaggregated_referenced_variables

Returns a list of the variable names used in this algebra expression except those used as aliases for aggregate operations.

AUTHOR

 Gregory Todd Williams <gwilliams@cpan.org>