Java ORA-06502:PL/SQL:数字或值错误ORA-06512:在第1行

我使用这个基本代码来调用Oracle函数

public void basicTest() throws Exception
    {
        System.out.println("Basic Oracle Function call test");
        // initialize the driver and try to make a connection
        DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
        Connection conn = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:xe", "admin", "qwerty");

        // prepareCall uses ANSI92 "call" syntax
        CallableStatement cstmt = conn.prepareCall("{? = call AGENT_STATISTICS_FUNCTION(?)}");

        // get those bind variables and parameters set up
        cstmt.registerOutParameter(1, Types.VARCHAR);
        cstmt.setString(2, "agent");

        // now we can do it, get it, close it, and print it
        cstmt.execute();
        String result = cstmt.getString(1);
        conn.close();
        System.out.println(result);
    }

Oracle功能：

CREATE OR REPLACE FUNCTION AGENT_STATISTICS_FUNCTION(NAMEIN IN VARCHAR2

)
RETURN CLOB
AS
.................

    LINE CLOB;
...............

BEGIN

   LINE := EMPTY_CLOB();
   DBMS_LOB.CREATETEMPORARY(LINE,TRUE);
..............

    RETURN LINE;
END AGENT_STATISTICS_FUNCTION;
/

我得到这个错误：

java.sql.SQLException: ORA-06502: PL/SQL: numeric or value error
ORA-06512: at line 1

    at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:450)
    at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:399)
    at oracle.jdbc.driver.T4C8Oall.processError(T4C8Oall.java:1059)
    at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:522)
    at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:257)
    at oracle.jdbc.driver.T4C8Oall.doOALL(T4C8Oall.java:587)
    at oracle.jdbc.driver.T4CCallableStatement.doOall8(T4CCallableStatement.java:220)
    at oracle.jdbc.driver.T4CCallableStatement.doOall8(T4CCallableStatement.java:48)
    at oracle.jdbc.driver.T4CCallableStatement.executeForRows(T4CCallableStatement.java:938)
    at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1150)
    at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:4798)
    at oracle.jdbc.driver.OraclePreparedStatement.execute(OraclePreparedStatement.java:4901)
    at oracle.jdbc.driver.OracleCallableStatement.execute(OracleCallableStatement.java:5631)
    at oracle.jdbc.driver.OraclePreparedStatementWrapper.execute(OraclePreparedStatementWrapper.java:1385)
    at org.sql.engine.osgi.select.TestOracleFunction.extendedTest(TestOracleFunction.java:85)


Results :

Tests in error: 
  TestOracleFunction.extendedTest:85 » SQL ORA-06502: PL/SQL: numeric or value e...

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我尝试添加conn.prepareCall（“begindbms_output.enable（200000）；？：=AGENT_STATISTICS_FUNCTION（？）；end；”；但结果是一样的。你能提出一些解决办法吗。在SQL Developer中，代码运行正常？

您需要注册正确的输出类型：

cstmt.registerOutParameter(1, Types.CLOB);

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只是猜测：

cstmt.registerOutParameter（1，Types.CLOB）信息不足。在某个地方，您将clob放入varchar2，它会溢出（超过32k）。或者其他类似的事情，绝对正确。请将其粘贴为答案。@PeterPenzov此答案中已经指出，您的Java代码中存在概念错误；将函数的返回注册为Types.VARCHAR是错误的。您应该使用Oracle的专用CLOB类型。