public class SybaseMaxValueIncrementer extends AbstractColumnMaxValueIncrementer
DataFieldMaxValueIncrementer that increments
the maximum value of a given Sybase SQL Server table
with the equivalent of an auto-increment column. Note: If you use this class, your table key
column should NOT be defined as an IDENTITY column, as the sequence table does the job.
This class is intended to be used with Sybase Adaptive Server.
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 (id bigint identity) insert into tab_sequence values()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. HINT: Since Sybase supports the JDBC 3.0
getGeneratedKeys method,
it is recommended to use IDENTITY columns directly in the tables and then using a
SimpleJdbcInsert or utilizing
a KeyHolder when calling the with the
update(PreparedStatementCreator psc, KeyHolder generatedKeyHolder)
method of the JdbcTemplate.
Thanks to Yinwei Liu for the suggestion!
paddingLength| Constructor and Description |
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SybaseMaxValueIncrementer()
Default constructor for bean property style usage.
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SybaseMaxValueIncrementer(DataSource dataSource,
String incrementerName,
String columnName)
Convenience constructor.
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| Modifier and Type | Method and Description |
|---|---|
protected String |
getIncrementStatement()
Statement to use to increment the "sequence" value.
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protected long |
getNextKey()
Determine the next key to use, as a long.
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afterPropertiesSet, getCacheSize, getColumnName, setCacheSize, setColumnNamegetDataSource, getIncrementerName, getPaddingLength, nextIntValue, nextLongValue, nextStringValue, setDataSource, setIncrementerName, setPaddingLengthpublic SybaseMaxValueIncrementer()
public SybaseMaxValueIncrementer(DataSource dataSource, String incrementerName, String columnName)
dataSource - the DataSource to useincrementerName - the name of the sequence/table to usecolumnName - the name of the column in the sequence table to useprotected long getNextKey()
throws DataAccessException
AbstractDataFieldMaxValueIncrementergetNextKey in class AbstractDataFieldMaxValueIncrementerDataAccessExceptionprotected String getIncrementStatement()