Package net.ontopia.persistence.query.sql

Class EqualsSQLOptimizer

java.lang.Object

net.ontopia.persistence.query.sql.BooleanSQLOptimizer

net.ontopia.persistence.query.sql.EqualsSQLOptimizer

public class EqualsSQLOptimizer
extends BooleanSQLOptimizer

INTERNAL: SQL optimizer that removes A = A and A != A expressions.

Constructor Summary

Constructors

Constructor	Description
EqualsSQLOptimizer()

Method Summary

Modifier and Type	Method	Description
SQLQuery	optimize(SQLQuery query)
protected int	optimizeEquals(SQLEquals expr)
protected int	optimizeNotEquals(SQLNotEquals expr)

Methods inherited from class net.ontopia.persistence.query.sql.BooleanSQLOptimizer

optimizeAnd, optimizeExists, optimizeExpression, optimizeFalse, optimizeFilter, optimizeIn, optimizeIsNull, optimizeJoin, optimizeLike, optimizeNot, optimizeOr, optimizeOrderBy, optimizeQuery, optimizeSelect, optimizeSetOperation, optimizeValueExpression, optimizeVerbatimExpression

Methods inherited from class java.lang.Object

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

Constructor Details

EqualsSQLOptimizer

public EqualsSQLOptimizer()

Method Details

optimize

public SQLQuery optimize(SQLQuery query)

Specified by:

optimize in class BooleanSQLOptimizer

optimizeEquals

protected int optimizeEquals(SQLEquals expr)

Overrides:

optimizeEquals in class BooleanSQLOptimizer

optimizeNotEquals

protected int optimizeNotEquals(SQLNotEquals expr)

Overrides:

optimizeNotEquals in class BooleanSQLOptimizer