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Contents
require 'time'
module SPARQL; module Algebra
class Operator
##
# The SPARQL logical `now` operator.
#
# Returns an XSD dateTime value for the current query execution. All calls to this function in any one query execution must return the same value. The exact moment returned is not specified.
#
# @example
# (prefix ((xsd: <http://www.w3.org/2001/XMLSchema#>))
# (ask (filter (= (datatype ?n) xsd:dateTime)
# (extend ((?n (now)))
# (bgp)))))
#
# @see https://www.w3.org/TR/sparql11-query/#func-now
class Now < Operator::Nullary
include Evaluatable
NAME = :now
##
# Returns an XSD dateTime value for the current query execution. All calls to this function in any one query execution must return the same value. The exact moment returned is not specified.
#
# @return [RDF::Literal::Double] random value
def apply
RDF::Literal(DateTime.now)
end
end # Now
end # Operator
end; end # SPARQL::Algebra
Version data entries
5 entries across 5 versions & 1 rubygems