Package 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	Description
RexPermuteInputsShuttle(Mappings.TargetMapping mapping, boolean shouldMatchTargetType, RelNode... inputs)	Creates a RexPermuteInputsShuttle.
RexPermuteInputsShuttle(Mappings.TargetMapping mapping, RelNode... inputs)	Creates a RexPermuteInputsShuttle.

Method Summary

Modifier and Type	Method	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, mutate, visitArray, visitCorrelVariable, visitDynamicParam, visitFieldAccess, visitFieldCollations, visitLambda, visitLambdaRef, visitList, visitLiteral, visitLocalRef, visitOver, visitOverAggFunction, visitPatternFieldRef, visitRangeRef, visitSubQuery, visitTableInputRef, visitWindow

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.calcite.rex.RexVisitor

visitEach, visitList, visitList

Constructor Details

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

RexPermuteInputsShuttle

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

Creates a RexPermuteInputsShuttle.

The mapping provides at most one target for every source.

Parameters:

mapping - Mapping

shouldMatchTargetType - If false, each input reference is substituted with a reference retaining the original input's type. If true, each input reference is substituted with a reference matching the target type.

inputs - Input relational expressions

Method Details

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