Class MySQLIdentityColumnMaxValueIncrementer

java.lang.Object

org.springframework.jdbc.support.incrementer.AbstractDataFieldMaxValueIncrementer

org.springframework.jdbc.support.incrementer.AbstractColumnMaxValueIncrementer

org.springframework.jdbc.support.incrementer.AbstractIdentityColumnMaxValueIncrementer

org.springframework.jdbc.support.incrementer.MySQLIdentityColumnMaxValueIncrementer

All Implemented Interfaces:

InitializingBean, DataFieldMaxValueIncrementer

public class MySQLIdentityColumnMaxValueIncrementer
extends AbstractIdentityColumnMaxValueIncrementer

DataFieldMaxValueIncrementer that increments the maximum counter value of an auto-increment column of a given MySQL table.

The sequence is kept in a table. The storage engine used by the sequence table must be InnoDB in MySQL 8.0 or later since the current maximum auto-increment counter is required to be persisted across restarts of the database server.

Example:

create table tab_sequence (`id` bigint unsigned primary key auto_increment);

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.

Since:

6.1.2

Author:

Henning Pöttker

Field Summary

Fields inherited from class AbstractDataFieldMaxValueIncrementer

paddingLength

Constructor Summary

Constructors

Constructor	Description
MySQLIdentityColumnMaxValueIncrementer()	Default constructor for bean property style usage.
MySQLIdentityColumnMaxValueIncrementer(DataSource dataSource, String incrementerName, String columnName)	Convenience constructor.

Method Summary

Modifier and Type	Method	Description
protected String	getIdentityStatement()	Statement to use to obtain the current identity value.
protected String	getIncrementStatement()	Statement to use to increment the "sequence" value.

Methods inherited from class AbstractIdentityColumnMaxValueIncrementer

getDeleteStatement, getNextKey, isDeleteSpecificValues, setDeleteSpecificValues

Methods inherited from class AbstractColumnMaxValueIncrementer

afterPropertiesSet, getCacheSize, getColumnName, setCacheSize, setColumnName

Methods inherited from class AbstractDataFieldMaxValueIncrementer

getDataSource, getIncrementerName, getPaddingLength, nextIntValue, nextLongValue, nextStringValue, setDataSource, setIncrementerName, setPaddingLength

Methods inherited from class Object

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

Constructor Details

MySQLIdentityColumnMaxValueIncrementer

public MySQLIdentityColumnMaxValueIncrementer()

Default constructor for bean property style usage.

See Also:

• AbstractDataFieldMaxValueIncrementer.setDataSource(DataSource)
• AbstractDataFieldMaxValueIncrementer.setIncrementerName(String)
• AbstractColumnMaxValueIncrementer.setColumnName(String)

MySQLIdentityColumnMaxValueIncrementer

public MySQLIdentityColumnMaxValueIncrementer(DataSource dataSource,
 String incrementerName,
 String columnName)

Convenience constructor.

Parameters:

dataSource - the DataSource to use

incrementerName - the name of the sequence table to use

columnName - the name of the column in the sequence table to use

Method Details

getIncrementStatement

protected String getIncrementStatement()

Description copied from class: AbstractIdentityColumnMaxValueIncrementer

Statement to use to increment the "sequence" value.

Specified by:

getIncrementStatement in class AbstractIdentityColumnMaxValueIncrementer

Returns:

the SQL statement to use

getIdentityStatement

protected String getIdentityStatement()

Description copied from class: AbstractIdentityColumnMaxValueIncrementer

Statement to use to obtain the current identity value.

Specified by:

getIdentityStatement in class AbstractIdentityColumnMaxValueIncrementer

Returns:

the SQL statement to use