org.hibernate.dialect

Class ResultColumnReferenceStrategy

java.lang.Object

org.hibernate.dialect.ResultColumnReferenceStrategy

All Implemented Interfaces:

java.io.Serializable

public class ResultColumnReferenceStrategy
extends java.lang.Object
implements java.io.Serializable

Defines how we need to reference columns in the group-by, having, and order-by clauses.

Author:

Steve Ebersole

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static ResultColumnReferenceStrategy	ALIAS For databases which do not support SOURCE, ANSI SQL defines two allowable approaches.
static ResultColumnReferenceStrategy	ORDINAL For databases which do not support SOURCE, ANSI SQL defines two allowable approaches.
static ResultColumnReferenceStrategy	SOURCE This strategy says to reference the result columns by the qualified column name found in the result source.

Constructor Summary

Constructors

Constructor and Description
ResultColumnReferenceStrategy(java.lang.String name)

Method Summary

Methods

Modifier and Type	Method and Description
static ResultColumnReferenceStrategy	parse(java.lang.String name)
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

SOURCE

public static final ResultColumnReferenceStrategy SOURCE

This strategy says to reference the result columns by the qualified column name found in the result source. This strategy is not strictly allowed by ANSI SQL but is Hibernate's legacy behavior and is also the fastest of the strategies; thus it should be used if supported by the underlying database.

ALIAS

public static final ResultColumnReferenceStrategy ALIAS

For databases which do not support SOURCE, ANSI SQL defines two allowable approaches. One is to reference the result column by the alias it is given in the result source (if it is given an alias). This strategy says to use this approach.

The other QNSI SQL compliant approach is ORDINAL.

ORDINAL

public static final ResultColumnReferenceStrategy ORDINAL

For databases which do not support SOURCE, ANSI SQL defines two allowable approaches. One is to reference the result column by the ordinal position at which it appears in the result source. This strategy says to use this approach.

The other QNSI SQL compliant approach is ALIAS.

Constructor Detail

ResultColumnReferenceStrategy

public ResultColumnReferenceStrategy(java.lang.String name)

Method Detail

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

parse

public static ResultColumnReferenceStrategy parse(java.lang.String name)