org.apache.derby.impl.sql.compile

Class PredicateList.PredicateWrapper

java.lang.Object

org.apache.derby.impl.sql.compile.PredicateList.PredicateWrapper

Enclosing class:

PredicateList

private class PredicateList.PredicateWrapper
extends java.lang.Object

Inner class which helps statistics routines do their work. We need to keep track of the index position for each predicate for each index while we're manipulating predicates and statistics. Each predicate does have internal state for indexPosition, but this is a more permanent sort of indexPosition, which keeps track of the position for the index being considered in estimateCost. For us, each predicate can have different index positions for different indices.

Field Summary

Fields

Modifier and Type	Field and Description
(package private) int	indexPosition
(package private) Predicate	pred
(package private) int	predicateID

Constructor Summary

Constructors

Constructor and Description
PredicateList.PredicateWrapper(int ip, Predicate p, int predicateID)

Method Summary

Methods

Modifier and Type	Method and Description
(package private) boolean	before(PredicateList.PredicateWrapper other)
(package private) boolean	contiguous(PredicateList.PredicateWrapper other)
(package private) int	getIndexPosition()
(package private) Predicate	getPredicate()
(package private) int	getPredicateID()

Methods inherited from class java.lang.Object

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

Field Detail

indexPosition

int indexPosition

pred

Predicate pred

predicateID

int predicateID

Constructor Detail

PredicateList.PredicateWrapper

PredicateList.PredicateWrapper(int ip,
                              Predicate p,
                              int predicateID)

Method Detail

getIndexPosition

int getIndexPosition()

getPredicate

Predicate getPredicate()

getPredicateID

int getPredicateID()

before

boolean before(PredicateList.PredicateWrapper other)

contiguous

boolean contiguous(PredicateList.PredicateWrapper other)