Package org.apache.flink.table.planner.plan.rules.logical

Class FlinkProjectMergeRule

java.lang.Object

org.apache.calcite.plan.RelOptRule

org.apache.calcite.plan.RelRule<org.apache.calcite.rel.rules.ProjectMergeRule.Config>

org.apache.calcite.rel.rules.ProjectMergeRule

org.apache.flink.table.planner.plan.rules.logical.FlinkProjectMergeRule

All Implemented Interfaces:

org.apache.calcite.rel.rules.TransformationRule

public class FlinkProjectMergeRule
extends org.apache.calcite.rel.rules.ProjectMergeRule

Extends calcite's ProjectMergeRule, modification: only merge the two neighbouring Projects if each non-deterministic RexNode of bottom Project should appear at most once in the project list of top Project.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.calcite.rel.rules.ProjectMergeRule

org.apache.calcite.rel.rules.ProjectMergeRule.Config

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

org.apache.calcite.plan.RelRule.Done, org.apache.calcite.plan.RelRule.MatchHandler<R extends org.apache.calcite.plan.RelOptRule>, org.apache.calcite.plan.RelRule.OperandBuilder, org.apache.calcite.plan.RelRule.OperandDetailBuilder<R extends org.apache.calcite.rel.RelNode>, org.apache.calcite.plan.RelRule.OperandTransform

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

org.apache.calcite.plan.RelOptRule.ConverterRelOptRuleOperand

Field Summary

Fields

Modifier and Type	Field	Description
static final org.apache.calcite.plan.RelOptRule	INSTANCE

Fields inherited from class org.apache.calcite.rel.rules.ProjectMergeRule

DEFAULT_BLOAT

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	FlinkProjectMergeRule(org.apache.calcite.rel.rules.ProjectMergeRule.Config config)

Method Summary

Modifier and Type	Method	Description
boolean	matches(org.apache.calcite.plan.RelOptRuleCall call)

Methods inherited from class org.apache.calcite.rel.rules.ProjectMergeRule

onMatch

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

any, convert, convert, convertList, convertOperand, convertOperand, equals, equals, getOperand, getOperands, getOutConvention, getOutTrait, hashCode, none, 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

Field Details

INSTANCE

public static final org.apache.calcite.plan.RelOptRule INSTANCE

Constructor Details

FlinkProjectMergeRule

protected FlinkProjectMergeRule(org.apache.calcite.rel.rules.ProjectMergeRule.Config config)

Method Details

matches

public boolean matches(org.apache.calcite.plan.RelOptRuleCall call)

Overrides:

matches in class org.apache.calcite.rel.rules.ProjectMergeRule