Top Description Constructors Methods
org.springframework.jdbc.support.incrementer

public Class HsqlMaxValueIncrementer

extends AbstractIdentityColumnMaxValueIncrementer
Class Inheritance
Imports
javax.sql.DataSource
DataFieldMaxValueIncrementer that increments the maximum value of a given HSQL table with the equivalent of an auto-increment column.

Note

If you use this class, your HSQL key column should NOT be auto-increment, as the sequence table does the job.

The sequence is kept in a table. There should be one sequence table per table that needs an auto-generated key.

Example: 

create table tab (id int not null primary key, text varchar(100));
create table tab_sequence (value identity);
insert into tab_sequence values(0);
If "cacheSize" is set, the intermediate values are served without querying the database. If the server or your application is stopped or crashes or a transaction is rolled back, the unused values will never be served. The maximum hole size in numbering is consequently the value of cacheSize.

Note

HSQL now supports sequences and you should consider using them instead: HsqlSequenceMaxValueIncrementer

Authors
Jean-Pierre Pawlak, Thomas Risberg, Juergen Hoeller
See Also
HsqlSequenceMaxValueIncrementer

Constructor Summary

AccessConstructor and Description
public
HsqlMaxValueIncrementer()

Default constructor for bean property style usage.

public
HsqlMaxValueIncrementer(DataSource
the DataSource to use
dataSource, String
the name of the sequence/table to use
incrementerName, String
the name of the column in the sequence table to use
columnName)

Convenience constructor.

Method Summary

Modifier and TypeMethod and Description
protected String
getIdentityStatement()

Implements abstract org.springframework.jdbc.support.incrementer.AbstractIdentityColumnMaxValueIncrementer.getIdentityStatement.

Statement to use to obtain the current identity value.
protected String
getIncrementStatement()

Implements abstract org.springframework.jdbc.support.incrementer.AbstractIdentityColumnMaxValueIncrementer.getIncrementStatement.

Statement to use to increment the "sequence" value.
Inherited from org.springframework.jdbc.support.incrementer.AbstractIdentityColumnMaxValueIncrementer:
getDeleteStatementgetNextKeyisDeleteSpecificValuessetDeleteSpecificValues

Constructor Detail

HsqlMaxValueIncrementerback to summary
public HsqlMaxValueIncrementer()

Default constructor for bean property style usage.

See Also
setDataSource, setIncrementerName, setColumnName
HsqlMaxValueIncrementerback to summary
public HsqlMaxValueIncrementer(DataSource dataSource, String incrementerName, String columnName)

Convenience constructor.

Parameters
dataSource:DataSource

the DataSource to use

incrementerName:String

the name of the sequence/table to use

columnName:String

the name of the column in the sequence table to use

Method Detail

getIdentityStatementback to summary
protected String getIdentityStatement()

Implements abstract org.springframework.jdbc.support.incrementer.AbstractIdentityColumnMaxValueIncrementer.getIdentityStatement.

Doc from org.springframework.jdbc.support.incrementer.AbstractIdentityColumnMaxValueIncrementer.getIdentityStatement.

Statement to use to obtain the current identity value.

Returns:String

the SQL statement to use

Annotations
@Override
getIncrementStatementback to summary
protected String getIncrementStatement()

Implements abstract org.springframework.jdbc.support.incrementer.AbstractIdentityColumnMaxValueIncrementer.getIncrementStatement.

Doc from org.springframework.jdbc.support.incrementer.AbstractIdentityColumnMaxValueIncrementer.getIncrementStatement.

Statement to use to increment the "sequence" value.

Returns:String

the SQL statement to use

Annotations
@Override