Class: Axiom::Optimizer::Algebra::Rename::RestrictionOperand
- Inherits:
-
Axiom::Optimizer::Algebra::Rename
- Object
- Axiom::Optimizer
- Relation::Operation::Unary
- Axiom::Optimizer::Algebra::Rename
- Axiom::Optimizer::Algebra::Rename::RestrictionOperand
- Defined in:
- lib/axiom/optimizer/algebra/rename.rb
Overview
Optimize when the operand is a Restriction
Constant Summary
Constants inherited from Axiom::Optimizer
Instance Attribute Summary
Attributes inherited from Axiom::Optimizer::Algebra::Rename
Attributes inherited from Relation::Operation::Unary
Attributes included from Function::Unary
Attributes inherited from Axiom::Optimizer
Instance Method Summary collapse
-
#optimizable? ⇒ Boolean
private
Test if the operand is a Restriction.
-
#optimize ⇒ Restriction
private
Wrap the Rename in a Restriction.
Methods inherited from Axiom::Optimizer::Algebra::Rename
Methods inherited from Relation::Operation::Unary
Methods included from Function::Unary
Methods inherited from Axiom::Optimizer
Constructor Details
This class inherits a constructor from Axiom::Optimizer::Algebra::Rename
Instance Method Details
#optimizable? ⇒ Boolean
This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.
Test if the operand is a Restriction
160 161 162 |
# File 'lib/axiom/optimizer/algebra/rename.rb', line 160 def optimizable? operand.kind_of?(Axiom::Algebra::Restriction) end |
#optimize ⇒ Restriction
This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.
Wrap the Rename in a Restriction
169 170 171 |
# File 'lib/axiom/optimizer/algebra/rename.rb', line 169 def optimize wrap_operand.restrict(rename_predicate) end |