org.apache.calcite.rel.rules

Class PushProjector.InputSpecialOpFinder

java.lang.Object

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

org.apache.calcite.rel.rules.PushProjector.InputSpecialOpFinder

All Implemented Interfaces:

RexVisitor<Void>

Enclosing class:

PushProjector

private class PushProjector.InputSpecialOpFinder
extends RexVisitorImpl<Void>

Visitor which builds a bitmap of the inputs used by an expressions, as well as locating expressions corresponding to special operators.

Field Summary

Fields

Modifier and Type	Field and Description
private ImmutableBitSet	leftFields
private PushProjector.ExprCondition	preserveExprCondition
private List<RexNode>	preserveLeft
private List<RexNode>	preserveRight
private BitSet	rexRefs
private ImmutableBitSet	rightFields
private Strong	strong
private ImmutableBitSet	strongFields

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

deep

Constructor Summary

Constructors

Constructor and Description
InputSpecialOpFinder(BitSet rexRefs, ImmutableBitSet leftFields, ImmutableBitSet rightFields, ImmutableBitSet strongFields, PushProjector.ExprCondition preserveExprCondition, List<RexNode> preserveLeft, List<RexNode> preserveRight)

Method Summary

Modifier and Type	Method and Description
private void	addExpr(List<RexNode> exprList, RexNode newExpr) Adds an expression to a list if the same expression isn't already in the list.
private boolean	isStrong(ImmutableBitSet exprArgs, RexNode call)
private boolean	preserve(RexNode call)
Void	visitCall(RexCall call)
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

rexRefs

private final BitSet rexRefs

leftFields

private final ImmutableBitSet leftFields

rightFields

private final ImmutableBitSet rightFields

strongFields

private final ImmutableBitSet strongFields

preserveExprCondition

private final PushProjector.ExprCondition preserveExprCondition

preserveLeft

private final List<RexNode> preserveLeft

preserveRight

private final List<RexNode> preserveRight

strong

private final Strong strong

Constructor Detail

InputSpecialOpFinder

InputSpecialOpFinder(BitSet rexRefs,
                     ImmutableBitSet leftFields,
                     ImmutableBitSet rightFields,
                     ImmutableBitSet strongFields,
                     PushProjector.ExprCondition preserveExprCondition,
                     List<RexNode> preserveLeft,
                     List<RexNode> preserveRight)

Method Detail

visitCall

public Void visitCall(RexCall call)

Specified by:

visitCall in interface RexVisitor<Void>

Overrides:

visitCall in class RexVisitorImpl<Void>

isStrong

private boolean isStrong(ImmutableBitSet exprArgs,
                         RexNode call)

preserve

private boolean preserve(RexNode call)

visitInputRef

public Void visitInputRef(RexInputRef inputRef)

Specified by:

visitInputRef in interface RexVisitor<Void>

Overrides:

visitInputRef in class RexVisitorImpl<Void>

addExpr

private void addExpr(List<RexNode> exprList,
                     RexNode newExpr)

Adds an expression to a list if the same expression isn't already in the list. Expressions are identical if their digests are the same.

Parameters:

exprList - current list of expressions

newExpr - new expression to be added