好吧，我错过了什么？
我有一张这样的桌子：
CREATE TABLE PUBLIC.RESULTS
(RESULTID IDENTITY NOT NULL,
SOURCEID INTEGER NOT NULL,
PARENTID INTEGER,
NAME VARCHAR(25) NOT NULL,
VALUE CLOB NOT NULL,
PRIMARY KEY (RESULTID))
我尝试让 RESULTID 既是带有 AUTO_INCREMENT 的 INTEGER，又是 IDENTITY 类型。
我正在使用准备好的语句，无论我做什么，我在尝试设置 a 的值时都会抛出“无数据”异常：
String sql = "INSERT INTO RESULTS (SOURCEID, PARENTID, NAME, VALUE) VALUES (?, ?, ?, ?)";
PreparedStatement stmt = null;
stmt = conn.prepareStatement(sql, Statement.RETURN_GENERATED_KEYS);
... {Truncated setting of values} ...
stmt.executeUpdate();
conn.commit();
ResultSet rs2 = stmt.getGeneratedKeys();
rs2.next();
Integer a = rs2.getInt(1);
当我实际查看数据库时，数据已正确插入，为 RESULTID 字段设置下一个值就好了，我似乎无法返回该值。
我必须做一些愚蠢的事情，因为这应该有效。有任何想法吗？
由于有人问完整的堆栈跟踪如下：
org.h2.jdbc.JdbcSQLException: No data is available [2000-170]
at org.h2.message.DbException.getJdbcSQLException(DbException.java:329)
at org.h2.message.DbException.get(DbException.java:169)
at org.h2.message.DbException.get(DbException.java:146)
at org.h2.message.DbException.get(DbException.java:135)
at org.h2.jdbc.JdbcResultSet.checkOnValidRow(JdbcResultSet.java:2957)
at org.h2.jdbc.JdbcResultSet.get(JdbcResultSet.java:2963)
at org.h2.jdbc.JdbcResultSet.getInt(JdbcResultSet.java:307)
at com.cigital.db.DefaultDb.storeValue(DefaultDb.java:147)
at com.cigital.db.DefaultDb.processResult(DefaultDb.java:115)
at com.cigital.db.DefaultDb.importScan(DefaultDb.java:84)
at com.cigital.gui.Default.jButImportActionPerformed(Default.java:373)
at com.cigital.gui.Default.access$400(Default.java:26)
at com.cigital.gui.Default$6.actionPerformed(Default.java:131)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:272)
at java.awt.Component.processMouseEvent(Component.java:6289)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
at java.awt.Component.processEvent(Component.java:6054)
at java.awt.Container.processEvent(Container.java:2041)
at java.awt.Component.dispatchEventImpl(Component.java:4652)
at java.awt.Container.dispatchEventImpl(Container.java:2099)
at java.awt.Component.dispatchEvent(Component.java:4482)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4577)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168)
at java.awt.Container.dispatchEventImpl(Container.java:2085)
at java.awt.Window.dispatchEventImpl(Window.java:2478)
at java.awt.Component.dispatchEvent(Component.java:4482)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:644)
at java.awt.EventQueue.access$000(EventQueue.java:85)
at java.awt.EventQueue$1.run(EventQueue.java:603)
at java.awt.EventQueue$1.run(EventQueue.java:601)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98)
at java.awt.EventQueue$2.run(EventQueue.java:617)
at java.awt.EventQueue$2.run(EventQueue.java:615)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:614)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)