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

EqualsSQLOptimizer()

Method Summary

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 Detail

EqualsSQLOptimizer

public EqualsSQLOptimizer()

Method Detail

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