class SPARQL::Algebra::Operator::Create
The SPARQL
UPDATE `create` operator.
This operation creates a graph in the Graph
Store
This is a no-op for RDF.rb implementations, unless the graph exists
@example
(create silent <graph>)
Constants
- NAME
Public Instance Methods
execute(queryable, **options)
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Executes this upate on the given `writable` graph or repository.
@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 www.w3.org/TR/sparql11-update/
# File lib/sparql/algebra/operator/create.rb, line 34 def execute(queryable, **options) debug(options) {"Create"} silent = operands.first == :silent operands.shift if silent iri = operands.first raise ArgumentError, "clear expected a single IRI" if operands.length != 1 || !iri.is_a?(RDF::URI) if queryable.has_graph?(iri) raise IOError, "create operation graph #{iri.to_ntriples} exists" unless silent end queryable end