org.apache.flink.table.planner.hint

Class ClearQueryHintsOnUnmatchedNodesShuttle

java.lang.Object

org.apache.calcite.rel.RelShuttleImpl

org.apache.calcite.rel.RelHomogeneousShuttle

org.apache.flink.table.planner.hint.ClearQueryHintsOnUnmatchedNodesShuttle

All Implemented Interfaces:

org.apache.calcite.rel.RelShuttle

public class ClearQueryHintsOnUnmatchedNodesShuttle
extends org.apache.calcite.rel.RelHomogeneousShuttle

Clear the invalid query hints in the unmatched nodes. For example, a query hint may be attached in the Project node at first. After accepting this shuttle, the query hint in the Project node will be cleared.

See more at FlinkHintStrategies.

Tips, hints about view and alias will not be cleared.

Field Summary

Fields inherited from class org.apache.calcite.rel.RelShuttleImpl

stack

Constructor Summary

Constructors

Constructor and Description
ClearQueryHintsOnUnmatchedNodesShuttle(org.apache.calcite.rel.hint.HintStrategyTable hintStrategyTable)

Method Summary

Modifier and Type	Method and Description
org.apache.calcite.rel.RelNode	visit(org.apache.calcite.rel.RelNode other)

Methods inherited from class org.apache.calcite.rel.RelHomogeneousShuttle

visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit

Methods inherited from class org.apache.calcite.rel.RelShuttleImpl

visitChild, visitChildren

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ClearQueryHintsOnUnmatchedNodesShuttle

public ClearQueryHintsOnUnmatchedNodesShuttle(org.apache.calcite.rel.hint.HintStrategyTable hintStrategyTable)

Method Detail

visit

public org.apache.calcite.rel.RelNode visit(org.apache.calcite.rel.RelNode other)

Specified by:

visit in interface org.apache.calcite.rel.RelShuttle

Overrides:

visit in class org.apache.calcite.rel.RelShuttleImpl