提交 bd22bed1 编写于 作者: T Thomas Risberg

added a SybaseAnywhereMaxValueIncrementer since syntax is slightly different...

added a SybaseAnywhereMaxValueIncrementer since syntax is slightly different than for Sybase ASE (SPR-7623)
上级 a0fead18
package org.springframework.jdbc.support.incrementer;
import javax.sql.DataSource;
/**
* {@link org.springframework.jdbc.support.incrementer.DataFieldMaxValueIncrementer} that increments
* the maximum value of a given Sybase SQL Anywhere table
* with the equivalent of an auto-increment column. Note: If you use this class, your table key
* column should <i>NOT</i> be defined as an IDENTITY column, as the sequence table does the job.
*
* <p>This class is intended to be used with Sybase Anywhere.
*
* <p>The sequence is kept in a table. There should be one sequence table per
* table that needs an auto-generated key.
*
* <p>Example:
*
* <pre class="code"> create table tab (id int not null primary key, text varchar(100))
* create table tab_sequence (id bigint identity)
* insert into tab_sequence values(DEFAULT)</pre>
*
* 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.
*
* <b>HINT:</b> Since Sybase Anywhere supports the JDBC 3.0 <code>getGeneratedKeys</code> method,
* it is recommended to use IDENTITY columns directly in the tables and then using a
* {@link org.springframework.jdbc.core.simple.SimpleJdbcInsert} or utilizing
* a {@link org.springframework.jdbc.support.KeyHolder} when calling the with the
* <code>update(PreparedStatementCreator psc, KeyHolder generatedKeyHolder)</code>
* method of the {@link org.springframework.jdbc.core.JdbcTemplate}.
*
* <p>Thanks to Tarald Saxi Stormark for the suggestion!
*
* @author Thomas Risberg
* @since 3.0.5
*/
public class SybaseAnywhereMaxValueIncrementer extends SybaseMaxValueIncrementer {
/**
* Default constructor for bean property style usage.
* @see #setDataSource
* @see #setIncrementerName
* @see #setColumnName
*/
public SybaseAnywhereMaxValueIncrementer() {
}
/**
* Convenience constructor.
* @param dataSource the DataSource to use
* @param incrementerName the name of the sequence/table to use
* @param columnName the name of the column in the sequence table to use
*/
public SybaseAnywhereMaxValueIncrementer(DataSource dataSource, String incrementerName, String columnName) {
super(dataSource, incrementerName, columnName);
}
@Override
protected String getIncrementStatement() {
return "insert into " + getIncrementerName() + " values(DEFAULT)";
}
}
......@@ -12,11 +12,12 @@ import java.sql.ResultSet;
import java.sql.SQLException;
/**
* {@link org.springframework.jdbc.support.incrementer.DataFieldMaxValueIncrementer} that increments the maximum value of a given SQL Server table
* with the equivalent of an auto-increment column. Note: If you use this class, your Derby key
* {@link org.springframework.jdbc.support.incrementer.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 <i>NOT</i> be defined as an IDENTITY column, as the sequence table does the job.
*
* <p>This class is inteded to be used with Sybase Adaptive Server.
* <p>This class is intended to be used with Sybase Adaptive Server.
*
* <p>The sequence is kept in a table. There should be one sequence table per
* table that needs an auto-generated key.
......@@ -89,7 +90,7 @@ public class SybaseMaxValueIncrementer extends AbstractColumnMaxValueIncrementer
this.valueCache = new long[getCacheSize()];
this.nextValueIndex = 0;
for (int i = 0; i < getCacheSize(); i++) {
stmt.executeUpdate("insert into " + getIncrementerName() + " values()");
stmt.executeUpdate(getIncrementStatement());
ResultSet rs = stmt.executeQuery("select @@identity");
try {
if (!rs.next()) {
......@@ -115,4 +116,12 @@ public class SybaseMaxValueIncrementer extends AbstractColumnMaxValueIncrementer
return this.valueCache[this.nextValueIndex++];
}
/**
* Statement to use to increment the "sequence" value. Can be overridden by sub-classes.
* @return The SQL statement to use
*/
protected String getIncrementStatement() {
return "insert into " + getIncrementerName() + " values()";
}
}
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