Class: SPARQL::Algebra::Operator::Desc
- Defined in:
- lib/sparql/algebra/operator/desc.rb
Overview
The SPARQL descending sort operator.
[24] OrderCondition ::= ( ( ‘ASC’ | ‘DESC’ ) BrackettedExpression ) | ( Constraint | Var )
Constant Summary collapse
- NAME =
:desc
Constants inherited from Unary
Constants inherited from SPARQL::Algebra::Operator
Constants included from Expression
Instance Attribute Summary
Attributes inherited from SPARQL::Algebra::Operator
Instance Method Summary collapse
-
#to_sparql(**options) ⇒ String
Returns a partial SPARQL grammar for this operator.
Methods inherited from Asc
Methods included from Evaluatable
#apply, #evaluate, #memoize, #replace_aggregate!, #replace_vars!
Methods inherited from Unary
Methods inherited from SPARQL::Algebra::Operator
#aggregate?, arity, #base_uri, base_uri, base_uri=, #bind, #boolean, #constant?, #deep_dup, #each_descendant, #eql?, #evaluatable?, evaluate, #executable?, #first_ancestor, for, #initialize, #inspect, #ndvars, #node?, #operand, #optimize, #optimize!, #parent, #parent=, #prefixes, prefixes, prefixes=, #rewrite, #to_binary, to_sparql, #to_sxp, #to_sxp_bin, #validate!, #variable?, #variables, #vars
Methods included from Expression
cast, #constant?, #evaluate, extension, extension?, extensions, for, #invalid?, new, #node?, open, #optimize, #optimize!, parse, register_extension, #to_sxp_bin, #valid?, #validate!, #variable?
Constructor Details
This class inherits a constructor from SPARQL::Algebra::Operator::Unary
Instance Method Details
#to_sparql(**options) ⇒ String
Returns a partial SPARQL grammar for this operator.
Provides order to descendant query.
31 32 33 |
# File 'lib/sparql/algebra/operator/desc.rb', line 31 def to_sparql(**) "DESC(#{operands.last.to_sparql(**)})" end |