org.apache.calcite.rex

Class RexPermuteInputsShuttle

java.lang.Object

org.apache.calcite.rex.RexShuttle

org.apache.calcite.rex.RexPermuteInputsShuttle

All Implemented Interfaces:

RexVisitor<RexNode>

public class RexPermuteInputsShuttle
extends RexShuttle

Shuttle which applies a permutation to its input fields.

See Also:

RexPermutationShuttle, RexUtil.apply(org.apache.calcite.util.mapping.Mappings.TargetMapping, RexNode)

Constructor Summary

Constructors

Constructor and Description
RexPermuteInputsShuttle(Mappings.TargetMapping mapping, RelNode... inputs) Creates a RexPermuteInputsShuttle.

Method Summary

Methods

Modifier and Type	Method and Description
static RexPermuteInputsShuttle	of(Mappings.TargetMapping mapping) Creates a shuttle with an empty field list.
RexNode	visitCall(RexCall call)
RexNode	visitInputRef(RexInputRef local)

Methods inherited from class org.apache.calcite.rex.RexShuttle

apply, apply, apply, mutate, visitArray, visitCorrelVariable, visitDynamicParam, visitFieldAccess, visitFieldCollations, visitList, visitList, visitLiteral, visitLocalRef, visitOver, visitRangeRef, visitWindow

Methods inherited from class java.lang.Object

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

Constructor Detail

RexPermuteInputsShuttle

public RexPermuteInputsShuttle(Mappings.TargetMapping mapping,
                       RelNode... inputs)

Creates a RexPermuteInputsShuttle.

The mapping provides at most one target for every source. If a source has no targets and is referenced in the expression, Mappings.TargetMapping.getTarget(int) will give an error. Otherwise the mapping gives a unique target.

Parameters:

mapping - Mapping

inputs - Input relational expressions

Method Detail

of

public static RexPermuteInputsShuttle of(Mappings.TargetMapping mapping)

Creates a shuttle with an empty field list. It cannot handle GET calls but otherwise works OK.

visitInputRef

public RexNode visitInputRef(RexInputRef local)

Specified by:

visitInputRef in interface RexVisitor<RexNode>

Overrides:

visitInputRef in class RexShuttle

visitCall

public RexNode visitCall(RexCall call)

Specified by:

visitCall in interface RexVisitor<RexNode>

Overrides:

visitCall in class RexShuttle