org.apache.drill.exec.planner.common

Class DrillRelOptUtil.RexFieldsTransformer

java.lang.Object

org.apache.drill.exec.planner.common.DrillRelOptUtil.RexFieldsTransformer

Enclosing class:

DrillRelOptUtil

public static class DrillRelOptUtil.RexFieldsTransformer
extends Object

RexFieldsTransformer is a utility class used to convert column refs in a RexNode based on inputRefMap (input to output ref map). This transformer can be used to find and replace the existing inputRef in a RexNode with a new inputRef.

Constructor Summary

Constructors

Constructor and Description
RexFieldsTransformer(org.apache.calcite.rex.RexBuilder rexBuilder, Map<Integer,Integer> inputRefMap)

Method Summary

Modifier and Type	Method and Description
org.apache.calcite.rex.RexNode	go(org.apache.calcite.rex.RexNode rex)

Methods inherited from class java.lang.Object

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

Constructor Detail

RexFieldsTransformer

public RexFieldsTransformer(org.apache.calcite.rex.RexBuilder rexBuilder,
                            Map<Integer,Integer> inputRefMap)

Method Detail

go

public org.apache.calcite.rex.RexNode go(org.apache.calcite.rex.RexNode rex)