Package org.apache.calcite.plan

Class RexImplicationChecker.InputUsageFinder

java.lang.Object

org.apache.calcite.rex.RexVisitorImpl<java.lang.Void>

org.apache.calcite.plan.RexImplicationChecker.InputUsageFinder

All Implemented Interfaces:

RexVisitor<java.lang.Void>

Enclosing class:

RexImplicationChecker

private static class RexImplicationChecker.InputUsageFinder
extends RexVisitorImpl<java.lang.Void>

Visitor that builds a usage map of inputs used by an expression.

E.g: for x > 10 AND y < 20 AND x = 40, usage map is as follows:

• key: x value: {(>, 10),(=, 40), usageCount = 2}
• key: y value: {(>, 20), usageCount = 1}

Field Summary

Fields

Modifier and Type	Field	Description
(package private) java.util.Map<RexInputRef,RexImplicationChecker.InputRefUsage<SqlOperator,RexNode>>	usageMap

Fields inherited from class org.apache.calcite.rex.RexVisitorImpl

deep

Constructor Summary

Constructors

Constructor	Description
InputUsageFinder()

Method Summary

Modifier and Type	Method	Description
private RexImplicationChecker.InputRefUsage<SqlOperator,RexNode>	getUsageMap(RexInputRef rex)
private static RexNode	removeCast(RexNode inputRef)
private SqlOperator	reverse(SqlOperator op)
private void	updateBinaryOpUsage(RexCall call)
private void	updateUnaryOpUsage(RexCall call)
private void	updateUsage(SqlOperator op, RexInputRef inputRef, RexNode literal)
java.lang.Void	visitCall(RexCall call)
java.lang.Void	visitInputRef(RexInputRef inputRef)

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

visitArrayAnd, visitArrayOr, visitCorrelVariable, visitDynamicParam, visitFieldAccess, visitLiteral, visitLocalRef, visitOver, visitPatternFieldRef, visitRangeRef, visitSubQuery, visitTableInputRef

Methods inherited from class java.lang.Object

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

Field Detail

usageMap

final java.util.Map<RexInputRef,RexImplicationChecker.InputRefUsage<SqlOperator,RexNode>> usageMap

Constructor Detail

InputUsageFinder

InputUsageFinder()

Method Detail

visitInputRef

public java.lang.Void visitInputRef(RexInputRef inputRef)

Specified by:

visitInputRef in interface RexVisitor<java.lang.Void>

Overrides:

visitInputRef in class RexVisitorImpl<java.lang.Void>

visitCall

public java.lang.Void visitCall(RexCall call)

Specified by:

visitCall in interface RexVisitor<java.lang.Void>

Overrides:

visitCall in class RexVisitorImpl<java.lang.Void>

updateUnaryOpUsage

private void updateUnaryOpUsage(RexCall call)

updateBinaryOpUsage

private void updateBinaryOpUsage(RexCall call)

reverse

private SqlOperator reverse(SqlOperator op)

removeCast

private static RexNode removeCast(RexNode inputRef)

updateUsage

private void updateUsage(SqlOperator op,
                         RexInputRef inputRef,
                         RexNode literal)

getUsageMap

private RexImplicationChecker.InputRefUsage<SqlOperator,RexNode> getUsageMap(RexInputRef rex)