PreparedStatement +选择更新+主键列中的Oracle 12c + ORA-01461

Question

尝试执行select for update语句然后执行插入或更新时,我遇到了一个奇怪的问题.我得到一个ORA-01461例外.只有在使用最新的ojdbc驱动程序(12.1.0.2)时才会发生这种情况,而在较旧的驱动程序中它可以正常工作(12.1.0.1).

更具体地说,最新的驱动程序似乎在主键字符长度(限制为32个字符)中有某种限制,尽管相应的列声明超过32个字符.复制问题的示例代码如下:

CREATE TABLE "TEST_TABLE" (
 "TEST_ID" VARCHAR2(40 CHAR) NOT NULL ENABLE,
 "TEST_COMMENT" VARCHAR2(200 CHAR),
 CONSTRAINT "TEST_TABLE_PK" PRIMARY KEY ("TEST_ID")
);

还有一些java:

public class DemoUpdatableResultSet {

    private static final String DB_URL = "jdbc:oracle:thin:@xxxx:1521/xxxxx";
    private static final String DB_USER = "xxx";
    private static final String DB_PASS = "xxx";

  public static Connection getConnection() throws Exception {
    Class.forName("oracle.jdbc.driver.OracleDriver");
    Connection conn = DriverManager.getConnection(DB_URL, DB_USER, DB_PASS);
    return conn;
  }

  public static void main(String[] args) {
    final String uuid = UUID.randomUUID().toString();
    ResultSet rs = null;
    Connection conn = null;
    PreparedStatement pstmt = null;
    try {
      conn = getConnection();
      String query = "SELECT t.* FROM TEST_TABLE t WHERE t.TEST_ID=? FOR UPDATE";
      pstmt = conn.prepareStatement(query, ResultSet.TYPE_SCROLL_SENSITIVE,
          ResultSet.CONCUR_UPDATABLE);
      pstmt.setString(1, uuid); // set input values
      rs = pstmt.executeQuery(); // create an updatable ResultSet
                                               // insert column values into the insert row.
      rs.moveToInsertRow();                    // moves cursor to the insert row
      rs.updateString("TEST_ID", uuid);           // updates the 2nd column
      rs.updateString("TEST_COMMENT", "Comment for: " + uuid);
      rs.insertRow();
    } catch (Exception e) {
      e.printStackTrace();
    } finally {
      try {
        rs.close();
        pstmt.close();
        conn.close();
      } catch (SQLException e) {
        e.printStackTrace();
      }
    }
  }
}

main方法的第一行创建一个uuid

 UUID.randomUUID().toString();

这是36个字符长.运行此示例类将产生ORA-01461错误,但将上面提到的行更改为

 UUID.randomUUID().toString().replaceAll("-", "");

产生32个字符串的字符串将正确运行并在数据库中插入该行.请注意,保存上述字符串的"TEST_ID"列是VARCHAR2(40 CHAR),可以容纳32和36个字符串.将列的长度增加到更大的数字不会改变任何东西.

我希望我的示例代码易于阅读和理解,我期待着对这个问题的解决方案/解释.

谢谢!

数据库信息:

Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 - 64bit Production
PL/SQL Release 12.1.0.2.0 - Production
"CORE 12.1.0.2.0 Production"
TNS for Linux: Version 12.1.0.2.0 - Production
NLSRTL Version 12.1.0.2.0 - Production

稍微修改以运行具有相同数据的insert语句,以表明此问题比看起来更奇怪(关于uuid字符串长度).以下示例代码使用最新的oracle驱动程序正确执行:

  public static void main(String[] args) {
    final String uuid = UUID.randomUUID().toString();
    ResultSet rs = null;
    Connection conn = null;
    PreparedStatement pstmt = null;
    try {
      conn = getConnection();
      String query = "INSERT INTO TEST_TABLE (TEST_ID, TEST_COMMENT) VALUES (?, ?)";
      pstmt = conn.prepareStatement(query);
      pstmt.setString(1, uuid); // set input values
      pstmt.setString(2, "Comment for: " + uuid); // set input values
      rs = pstmt.executeQuery();
    } catch (Exception e) {
      e.printStackTrace();
    } finally {
      try {
        rs.close();
        pstmt.close();
        conn.close();
      } catch (SQLException e) {
        e.printStackTrace();
      }
    }
  }

Answer 1

向 oracle 提交了 SR，因为这是 12.1.0.2.0 jdbc 驱动程序的错误，需要补丁来解决它。