Package org.hibernate.dialect.sequence

Class DB2zSequenceSupport

java.lang.Object

org.hibernate.dialect.sequence.DB2zSequenceSupport

All Implemented Interfaces:

SequenceSupport

public final class DB2zSequenceSupport
extends Object
implements SequenceSupport

Sequence support for DB2zDialect.

Field Summary

Fields

Modifier and Type	Field	Description
static final SequenceSupport	INSTANCE

Constructor Summary

Constructors

Constructor	Description
DB2zSequenceSupport()

Method Summary

Modifier and Type	Method	Description
String	getCreateSequenceString(String sequenceName)	Typically dialects which support sequences can create a sequence with a single command.
String	getCreateSequenceString(String sequenceName, int initialValue, int incrementSize)	Typically dialects which support sequences can create a sequence with a single command.
String	getFromDual()
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.

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

getCreateSequenceStrings, getCreateSequenceStrings, getDropSequenceString, getDropSequenceStrings, getSequenceNextValString, getSequenceNextValString, getSequencePreviousValString, sometimesNeedsStartingValue, startingValue, supportsPooledSequences, supportsSequences

Field Details

INSTANCE

public static final SequenceSupport INSTANCE

Constructor Details

DB2zSequenceSupport

public DB2zSequenceSupport()

Method Details

getFromDual

public String getFromDual()

Specified by:

getFromDual in interface SequenceSupport

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)

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.

getCreateSequenceString

public String getCreateSequenceString(String sequenceName)

Description copied from interface: SequenceSupport

Typically dialects which support sequences can create a sequence with a single command. This method is a convenience making it easier to implement SequenceSupport.getCreateSequenceStrings(String,int,int) for these dialects.

The default definition is to return create sequence sequenceName for the argument sequenceName. Dialects need to override this method if a sequence created in this manner does not start at 1, or if the syntax is nonstandard.

Dialects which support sequences and can create a sequence in a single command need *only* override this method. Dialects which support sequences but require multiple commands to create a sequence should override SequenceSupport.getCreateSequenceStrings(String,int,int) instead.

Specified by:

getCreateSequenceString in interface SequenceSupport

Parameters:

sequenceName - The name of the sequence

Returns:

The sequence creation command

getCreateSequenceString

public String getCreateSequenceString(String sequenceName,
 int initialValue,
 int incrementSize)

Description copied from interface: SequenceSupport

Typically dialects which support sequences can create a sequence with a single command. This method is a convenience making it easier to implement SequenceSupport.getCreateSequenceStrings(String,int,int) for these dialects.

Overloaded form of SequenceSupport.getCreateSequenceString(String), additionally taking the initial value and increment size to be applied to the sequence definition.

The default definition is to suffix SequenceSupport.getCreateSequenceString(String) with the string: start with initialValue increment by incrementSize for the arguments initialValue and incrementSize. Dialects need to override this method if different key phrases are used to apply the allocation information.

Specified by:

getCreateSequenceString in interface SequenceSupport

Parameters:

sequenceName - The name of the sequence

initialValue - The initial value to apply to 'create sequence' statement

incrementSize - The increment value to apply to 'create sequence' statement

Returns:

The sequence creation command