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Contents
module SPARQL; module Algebra
class Operator
##
# The SPARQL UPDATE `using` operator.
#
# The USING and USING NAMED clauses affect the RDF Dataset used while evaluating the WHERE clause. This describes a dataset in the same way as FROM and FROM NAMED clauses describe RDF Datasets in the SPARQL 1.1 Query Language
#
# @example
# (using (:g1) (bgp (triple ?s ?p ?o)))
#
# @see http://www.w3.org/TR/sparql11-update/#add
class Using < Operator
include SPARQL::Algebra::Query
NAME = :using
##
# Executes this upate on the given `writable` graph or repository.
#
# Delegates to Dataset
#
# @param [RDF::Queryable] queryable
# the graph or repository to write
# @param [Hash{Symbol => Object}] options
# any additional keyword options
# @option options [Boolean] debug
# Query execution debugging
# @return [RDF::Queryable]
# Returns queryable.
# @raise [IOError]
# If `from` does not exist, unless the `silent` operator is present
# @see http://www.w3.org/TR/sparql11-update/
def execute(queryable, options = {}, &block)
debug(options) {"Using"}
Dataset.new(*operands).execute(queryable, options.merge(depth: options[:depth].to_i + 1), &block)
end
end # Using
end # Operator
end; end # SPARQL::Algebra
Version data entries
17 entries across 17 versions & 1 rubygems