Class: SPARQL::Algebra::Operator::Using

Inherits:
SPARQL::Algebra::Operator show all
Includes:
Query
Defined in:
vendor/bundler/ruby/2.4.0/bundler/gems/sparql-e0a915196943/lib/sparql/algebra/operator/using.rb

Overview

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

Examples:

(using (:g1) (bgp (triple ?s ?p ?o)))

See Also:

Constant Summary

NAME =
:using

Constants inherited from SPARQL::Algebra::Operator

ARITY, IsURI, URI

Instance Attribute Summary

Attributes included from Query

#solutions

Attributes inherited from SPARQL::Algebra::Operator

#operands

Instance Method Summary collapse

Methods included from Query

#each_solution, #empty?, #failed?, #graph_name=, #matched?, #query_yields_boolean?, #query_yields_solutions?, #query_yields_statements?, #unshift, #variables

Methods inherited from SPARQL::Algebra::Operator

#aggregate?, arity, base_uri, #base_uri, base_uri=, #boolean, #constant?, #each_descendant, #eql?, #evaluatable?, evaluate, #executable?, #first_ancestor, for, #initialize, #inspect, #ndvars, #node?, #operand, #optimize, #parent, #parent=, prefixes, #prefixes, prefixes=, #rewrite, #to_binary, #to_sxp, #to_sxp_bin, #validate!, #variable?, #vars

Methods included from Expression

cast, #constant?, #evaluate, extension, extensions, for, #invalid?, new, #node?, open, #optimize, parse, register_extension, #to_sxp_bin, #valid?, #validate!, #variable?

Constructor Details

This class inherits a constructor from SPARQL::Algebra::Operator

Instance Method Details

#execute(queryable, options = {}, &block) ⇒ RDF::Queryable

Executes this upate on the given writable graph or repository.

Delegates to Dataset

Parameters:

  • queryable (RDF::Queryable)

    the graph or repository to write

  • options (Hash{Symbol => Object}) (defaults to: {})

    any additional keyword options

Options Hash (options):

  • debug (Boolean)

    Query execution debugging

Returns:

Raises:

  • (IOError)

    If from does not exist, unless the silent operator is present

See Also:



34
35
36
37
# File 'vendor/bundler/ruby/2.4.0/bundler/gems/sparql-e0a915196943/lib/sparql/algebra/operator/using.rb', line 34

def execute(queryable, options = {}, &block)
  debug(options) {"Using"}
  Dataset.new(*operands).execute(queryable, options.merge(depth: options[:depth].to_i + 1), &block)
end