Class: Axiom::Optimizer::Algebra::Join::DisjointHeaders
- Inherits:
-
Axiom::Optimizer::Algebra::Join
- Object
- Axiom::Optimizer
- Relation::Operation::Binary
- Relation::Operation::Combination
- Axiom::Optimizer::Algebra::Join
- Axiom::Optimizer::Algebra::Join::DisjointHeaders
- Defined in:
- lib/axiom/optimizer/algebra/join.rb
Overview
Optimize when operands’ headers are disjoint
Constant Summary
Constants inherited from Axiom::Optimizer::Algebra::Join
Constants inherited from Axiom::Optimizer
Instance Attribute Summary
Attributes included from Function::Binary
Attributes inherited from Axiom::Optimizer
Instance Method Summary collapse
-
#optimizable? ⇒ Boolean
private
Test if the operands’ headers are disjoint.
-
#optimize ⇒ Algebra::Product
private
A Join with disjoint headers is a Product.
Methods included from Function::Binary
Methods inherited from Axiom::Optimizer
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 operands’ headers are disjoint
67 68 69 |
# File 'lib/axiom/optimizer/algebra/join.rb', line 67 def optimizable? (left.header & right.header).none? end |
#optimize ⇒ Algebra::Product
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.
A Join with disjoint headers is a Product
76 77 78 |
# File 'lib/axiom/optimizer/algebra/join.rb', line 76 def optimize left.product(right) end |