Package org.apache.calcite.rel.rules

Class ProjectToWindowRule

java.lang.Object

org.apache.calcite.plan.RelOptRule

org.apache.calcite.plan.RelRule<ProjectToWindowRule.Config>

org.apache.calcite.rel.rules.ProjectToWindowRule

All Implemented Interfaces:

TransformationRule

Direct Known Subclasses:

ProjectToWindowRule.CalcToWindowRule, ProjectToWindowRule.ProjectToLogicalProjectAndWindowRule

public abstract class ProjectToWindowRule
extends RelRule<ProjectToWindowRule.Config>
implements TransformationRule

Planner rule that slices a Project into sections which contain windowed aggregate functions and sections which do not.

The sections which contain windowed agg functions become instances of LogicalWindow. If the LogicalCalc does not contain any windowed agg functions, does nothing.

There is also a variant that matches Calc rather than Project.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ProjectToWindowRule.CalcToWindowRule	Instance of the rule that applies to a Calc that contains windowed aggregates and converts it into a mixture of LogicalWindow and Calc.
static interface	ProjectToWindowRule.Config	Rule configuration.
static class	ProjectToWindowRule.ProjectToLogicalProjectAndWindowRule	Instance of the rule that can be applied to a Project and that produces, in turn, a mixture of LogicalProject and LogicalWindow.

Nested classes/interfaces inherited from class org.apache.calcite.plan.RelRule

RelRule.Done, RelRule.MatchHandler<R extends RelOptRule>, RelRule.OperandBuilder, RelRule.OperandDetailBuilder<R extends RelNode>, RelRule.OperandTransform

Nested classes/interfaces inherited from class org.apache.calcite.plan.RelOptRule

RelOptRule.ConverterRelOptRuleOperand

Field Summary

Fields inherited from class org.apache.calcite.plan.RelRule

config

Fields inherited from class org.apache.calcite.plan.RelOptRule

description, operands, relBuilderFactory

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	ProjectToWindowRule(ProjectToWindowRule.Config config)	Creates a ProjectToWindowRule.

Method Summary

Methods inherited from class org.apache.calcite.plan.RelOptRule

any, convert, convert, convert, convert, convertList, convertOperand, convertOperand, equals, equals, getOperand, getOperands, getOutConvention, getOutTrait, hashCode, matches, none, onMatch, operand, operand, operand, operand, operand, operandJ, operandJ, some, toString, unordered

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Details

ProjectToWindowRule

protected ProjectToWindowRule(ProjectToWindowRule.Config config)

Creates a ProjectToWindowRule.