org.apache.calcite.rex

Class RexUtil.CnfHelper

java.lang.Object

org.apache.calcite.rex.RexUtil.CnfHelper

Enclosing class:

RexUtil

private static class RexUtil.CnfHelper
extends Object

Helps RexUtil.toCnf(org.apache.calcite.rex.RexBuilder, org.apache.calcite.rex.RexNode).

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private static class	RexUtil.CnfHelper.OverflowError Exception to catch when we pass the limit.

Field Summary

Fields

Modifier and Type	Field and Description
(package private) int	currentCount
(package private) int	maxNodeCount
(package private) RexBuilder	rexBuilder

Constructor Summary

Constructors

Modifier	Constructor and Description
private	CnfHelper(RexBuilder rexBuilder, int maxNodeCount)

Method Summary

Modifier and Type	Method and Description
private RexNode	and(Iterable<? extends RexNode> nodes)
private Map<String,RexNode>	commonFactors(List<RexNode> nodes)
private void	incrementAndCheck()
private RexNode	or(Iterable<? extends RexNode> nodes)
private RexNode	pull(RexNode rex)
private List<RexNode>	pullList(List<RexNode> nodes)
private RexNode	removeFactor(Map<String,RexNode> factors, RexNode node)
RexNode	toCnf(RexNode rex)
private RexNode	toCnf2(RexNode rex)

Methods inherited from class java.lang.Object

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

Field Detail

rexBuilder

final RexBuilder rexBuilder

currentCount

int currentCount

maxNodeCount

final int maxNodeCount

Constructor Detail

CnfHelper

private CnfHelper(RexBuilder rexBuilder,
                  int maxNodeCount)

Method Detail

toCnf

public RexNode toCnf(RexNode rex)

toCnf2

private RexNode toCnf2(RexNode rex)

incrementAndCheck

private void incrementAndCheck()

pull

private RexNode pull(RexNode rex)

pullList

private List<RexNode> pullList(List<RexNode> nodes)

commonFactors

private Map<String,RexNode> commonFactors(List<RexNode> nodes)

removeFactor

private RexNode removeFactor(Map<String,RexNode> factors,
                             RexNode node)

and

private RexNode and(Iterable<? extends RexNode> nodes)

or

private RexNode or(Iterable<? extends RexNode> nodes)