net.sf.basedb.core.query
Interface Join

All Superinterfaces:

QueryElement

All Known Implementing Classes:

DynamicJoin, ExtraValueJoin, HqlInnerJoin, HqlLeftJoin, HqlRightJoin, RealJoin, ReporterListJoin

public interface Join
extends QueryElement

A join query element. This is a query element that can appear in the JOIN part of a Query. Typically a join consists of join table and a join condition (SQL) or an association property (HQL). Examples:

// SQL
SELECT hw.* 
FROM Hardware hw
JOIN HardwareTypes hwt ON hw.hardwaretype_id = hwt.id

// HQL
SELECT hw 
FROM HardwareData hw
JOIN hw.hardwareType hwt

Joins for HQL can be created by the Hql factory class.

Version:

2.0

Author:

Nicklas

See Also:

Hql

Last modified

$Date: 2009-04-06 14:52:39 +0200 (Mon, 06 Apr 2009) $

Method Summary

String	getThetaJoin(Query query, DbControl dc)
String	getThetaJoinCondition(Query query, DbControl dc)

Methods inherited from interface net.sf.basedb.core.query.QueryElement

getChildren, toQl

Method Detail

getThetaJoin

String getThetaJoin(Query query,
                    DbControl dc)
                    throws BaseException

Throws:

BaseException

getThetaJoinCondition

String getThetaJoinCondition(Query query,
                             DbControl dc)
                             throws BaseException

Throws:

BaseException