Class DB2iSequenceSupport

java.lang.Object

org.hibernate.dialect.sequence.DB2iSequenceSupport

All Implemented Interfaces:

SequenceSupport

public class DB2iSequenceSupport
extends Object
implements SequenceSupport

Sequence support for DB2iDialect.

Field Summary

Fields

Modifier and Type	Field	Description
static final SequenceSupport	INSTANCE

Constructor Summary

Constructors

Constructor	Description
DB2iSequenceSupport()

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	getSelectSequenceNextValString(String sequenceName)	Generate the select expression fragment that will retrieve the next value of a sequence as part of another (typically DML) statement.
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 Object

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

Methods inherited from interface SequenceSupport

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

Field Details

INSTANCE

public static final SequenceSupport INSTANCE

Constructor Details

DB2iSequenceSupport

public DB2iSequenceSupport()

Method Details

getSelectSequenceNextValString

public String getSelectSequenceNextValString(String sequenceName)

Description copied from interface: SequenceSupport

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

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

Specified by:

getSelectSequenceNextValString in interface SequenceSupport

Parameters:

sequenceName - the name of the sequence

Returns:

The "next value" fragment.

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

Parameters:

sequenceName - the name of the sequence

Returns:

The "previous value" fragment.

Throws:

MappingException - If sequences are not supported.

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.

Specified by:

getSequenceNextValString in interface SequenceSupport

Parameters:

sequenceName - the name of the sequence

Returns:

String The select "next value" statement.

getSequencePreviousValString

public String getSequencePreviousValString(String sequenceName)
                                    throws MappingException

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.

Specified by:

getSequencePreviousValString in interface SequenceSupport

Parameters:

sequenceName - the name of the sequence

Returns:

String The select "previous value" statement.

Throws:

MappingException - If sequences are not supported.

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 a convenience form of SequenceSupport.getDropSequenceStrings(String) which facilitates 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(String).

Specified by:

getDropSequenceString in interface SequenceSupport

Parameters:

sequenceName - The name of the sequence

Returns:

The sequence drop commands