Package org.hibernate.dialect.sequence

Class DB2SequenceSupport

java.lang.Object

org.hibernate.dialect.sequence.ANSISequenceSupport

org.hibernate.dialect.sequence.DB2SequenceSupport

All Implemented Interfaces:

SequenceSupport

Direct Known Subclasses:

DerbySequenceSupport

public class DB2SequenceSupport
extends ANSISequenceSupport

Sequence support for DB2Dialect.

Field Summary

Fields

Modifier and Type	Field	Description
static SequenceSupport	INSTANCE

Constructor Summary

Constructors

Constructor	Description
DB2SequenceSupport()

Method Summary

Modifier and Type	Method	Description
String	getDropSequenceString(String sequenceName)	Typically dialects which support sequences can drop a sequence with a single command.
String	getSelectSequencePreviousValString(String sequenceName)	Generate the select expression fragment that will retrieve the previous value of a sequence as part of another (typically DML) statement.
String	getSequenceNextValString(String sequenceName)	Generate the appropriate select statement to to retrieve the next value of a sequence.
String	getSequencePreviousValString(String sequenceName)	Generate the appropriate select statement to to retrieve the previous value of a sequence.

Methods inherited from class org.hibernate.dialect.sequence.ANSISequenceSupport

getSelectSequenceNextValString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.hibernate.dialect.sequence.SequenceSupport

getCreateSequenceString, getCreateSequenceString, getCreateSequenceStrings, getDropSequenceStrings, getFromDual, getSequenceNextValString, sometimesNeedsStartingValue, startingValue, supportsPooledSequences, supportsSequences

Field Detail

INSTANCE

public static final SequenceSupport INSTANCE

Constructor Detail

DB2SequenceSupport

public DB2SequenceSupport()

Method Detail

getSequenceNextValString

public String getSequenceNextValString(String sequenceName)

Description copied from interface: SequenceSupport

Generate the appropriate select statement to to retrieve the next value of a sequence.

This should be a stand alone select statement.

Parameters:

sequenceName - the name of the sequence

Returns:

String The select "next value" statement.

getSelectSequencePreviousValString

public String getSelectSequencePreviousValString(String sequenceName)
                                          throws MappingException

Description copied from interface: SequenceSupport

Generate the select expression fragment that will retrieve the previous value of a sequence as part of another (typically DML) statement.

This differs from SequenceSupport.getSequencePreviousValString(String) in that it must return an expression usable within another statement.

Specified by:

getSelectSequencePreviousValString in interface SequenceSupport

Overrides:

getSelectSequencePreviousValString in class ANSISequenceSupport

Parameters:

sequenceName - the name of the sequence

Returns:

The "previous value" fragment.

Throws:

MappingException - If sequences are not supported.

getSequencePreviousValString

public String getSequencePreviousValString(String sequenceName)

Description copied from interface: SequenceSupport

Generate the appropriate select statement to to retrieve the previous value of a sequence.

This should be a stand alone select statement.

Parameters:

sequenceName - the name of the sequence

Returns:

String The select "previous value" statement.

getDropSequenceString

public String getDropSequenceString(String sequenceName)

Description copied from interface: SequenceSupport

Typically dialects which support sequences can drop a sequence with a single command. This is convenience form of SequenceSupport.getDropSequenceStrings(java.lang.String) to help facilitate that.

Dialects which support sequences and can drop a sequence in a single command need *only* override this method. Dialects which support sequences but require multiple commands to drop a sequence should instead override SequenceSupport.getDropSequenceStrings(java.lang.String).

Parameters:

sequenceName - The name of the sequence

Returns:

The sequence drop commands