Class: Veritas::Optimizer::Algebra::Projection

Inherits:

Relation::Operation::Unary

• Object
• Veritas::Optimizer
• Relation::Operation::Unary
• Veritas::Optimizer::Algebra::Projection

Defined in:

lib/veritas/optimizer/algebra/projection.rb

Overview

Abstract base class representing Projection optimizations

Direct Known Subclasses

EmptyOperand, OrderOperand, ProjectionOperand, UnionOperand, UnoptimizedOperand

Defined Under Namespace

Classes: EmptyOperand, OrderOperand, ProjectionOperand, UnionOperand, UnoptimizedOperand

Constant Summary

Constants inherited from Veritas::Optimizer

Noop, VERSION

Instance Attribute Summary

Attributes inherited from Relation::Operation::Unary

#header

Attributes included from Function::Unary

#operand

Attributes inherited from Veritas::Optimizer

#operation

Method Summary

Methods inherited from Relation::Operation::Unary

#initialize

Methods included from Function::Unary

#initialize

Methods inherited from Veritas::Optimizer

chain, #initialize, #optimizable?, #optimize

Constructor Details

This class inherits a constructor from Veritas::Optimizer::Relation::Operation::Unary