org.apache.flink.table.planner.plan.rules.physical.stream

类 PushFilterPastChangelogNormalizeRule

java.lang.Object

org.apache.calcite.plan.RelOptRule

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

org.apache.flink.table.planner.plan.rules.physical.stream.PushFilterPastChangelogNormalizeRule

@Internal
public class PushFilterPastChangelogNormalizeRule
extends org.apache.calcite.plan.RelRule<PushFilterPastChangelogNormalizeRule.Config>

Pushes primary key filters through a ChangelogNormalize operator to reduce its state size.

This rule looks for Calc → ChangelogNormalize where the Calc contains a filter condition. The condition is transformed into CNF and then each conjunction is tested for whether it affects only primary key columns. If such conditions exist, they are moved into a new, separate Calc and pushed through the ChangelogNormalize operator. ChangelogNormalize keeps state for every unique key it encounters, thus pushing filters on the primary key in front of it helps reduce the size of its state.

Note that pushing primary key filters is safe to do, but pushing any other filters can lead to incorrect results.

嵌套类概要

嵌套类

限定符和类型	类和说明
static interface	PushFilterPastChangelogNormalizeRule.Config Configuration for PushFilterPastChangelogNormalizeRule.

从类继承的嵌套类/接口 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

从类继承的嵌套类/接口 org.apache.calcite.plan.RelOptRule

org.apache.calcite.plan.RelOptRule.ConverterRelOptRuleOperand

字段概要

字段

限定符和类型	字段和说明
static org.apache.calcite.plan.RelOptRule	INSTANCE

从类继承的字段 org.apache.calcite.plan.RelRule

config

从类继承的字段 org.apache.calcite.plan.RelOptRule

description, operands, relBuilderFactory

构造器概要

构造器

构造器和说明
PushFilterPastChangelogNormalizeRule(PushFilterPastChangelogNormalizeRule.Config config)

方法概要

限定符和类型	方法和说明
void	onMatch(org.apache.calcite.plan.RelOptRuleCall call)

从类继承的方法 org.apache.calcite.plan.RelOptRule

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

从类继承的方法 java.lang.Object

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

字段详细资料

INSTANCE

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

构造器详细资料

PushFilterPastChangelogNormalizeRule

public PushFilterPastChangelogNormalizeRule(PushFilterPastChangelogNormalizeRule.Config config)

方法详细资料

onMatch

public void onMatch(org.apache.calcite.plan.RelOptRuleCall call)

指定者:

onMatch 在类中 org.apache.calcite.plan.RelOptRule