class SPARQL::Algebra::Operator::Table
This is used to provide inline values. Each row becomes a solution.
@example
(table (vars ?book ?title) (row (?title "SPARQL Tutorial")) (row (?book :book2)))
@example empty table
(table unit)
@see www.w3.org/TR/2013/REC-sparql11-query-20130321/#inline-data
Constants
- NAME
Public Instance Methods
execute(queryable, **options, &block)
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Returns solutions for each row
@param [RDF::Queryable] queryable
the graph or repository to query
@param [Hash{Symbol => Object}] options
any additional keyword options
@yield [solution]
each matching solution
@yieldparam [RDF::Query::Solution] solution @yieldreturn [void] ignored @return [RDF::Query::Solutions]
the resulting solution sequence
@see www.w3.org/TR/sparql11-query/#sparqlAlgebra
# File lib/sparql/algebra/operator/table.rb, line 36 def execute(queryable, **options, &block) @solutions = RDF::Query::Solutions() Array(operands[1..-1]).each do |row| next unless row.is_a?(Array) bindings = row[1..-1].inject({}) do |memo, (var, value)| memo[var.to_sym] = value unless value == :undef memo end @solutions << RDF::Query::Solution.new(bindings) end @solutions.each(&block) if block_given? @solutions end