Oracle SQL中的无效标识符

Question

我没有在表中用双引号创建任何columns(PAYMENTTERM) ，但仍然出现以下错误：

Error(26,9): PL/SQL: SQL Statement ignored
Error(27,29): PL/SQL: ORA-00904: "P"."PAYMENTTERM": invalid identifier

请指出我在做什么错以及需要纠正的问题：

CREATE OR REPLACE
PROCEDURE PAYTERMUPDATE
IS
    RecordCount INT;
BEGIN
    SELECT
        count(1) INTO RecordCount 
    FROM 
        docmeta d 
    INNER JOIN temp_pay_term p ON d.XPROJECT_ID = p.PID
    WHERE
        lower(d.PAYMENTTERM) <> lower(p.PAYMENTTERM);

    DBMS_OUTPUT.PUT_LINE('');
    DBMS_OUTPUT.PUT_LINE('There were '
            || to_char(RecordCount)
            || ' records where payment term is mismatch.');
    DBMS_OUTPUT.PUT_LINE('');

    FOR X IN (
        SELECT p.PID, p.PAYMENTTERM
        FROM docmeta d, temp_pay_term p
        WHERE d.XPROJECT_ID = p.PID AND d.PAYMENTTERM <> p.PAYMENTTERM)
    LOOP
       UPDATE docmeta
           SET d.PAYMENTTERM = p.PAYMENTTERM
       WHERE XPROJECT_ID = X.PID;
    END LOOP;

    COMMIT;

EXCEPTION
WHEN OTHERS THEN
      raise_application_error(-1000,
                    'Error occured, No payment term were updated');

END PAYTERMUPDATE;

Answer 1

在这一行：

UPDATE docmeta
SET d.PAYMENTTERM = p.PAYMENTTERM
WHERE XPROJECT_ID = X.PID ; 

您必须在docmeta（d）上添加别名，并且p.PAYMENTTERM别名必须为X

因此，以这种方式更改您的查询：

UPDATE docmeta d
SET d.PAYMENTTERM = X.PAYMENTTERM
WHERE XPROJECT_ID = X.PID ; 

Answer 2

在您的情况下，将循环变量用作PAYMENTTERM别名，即X ，还将DOCMETA别名声明为d 。

Answer 3

尝试这个？

LOOP 
    UPDATE docmeta d
    SET d.PAYMENTTERM = p.PAYMENTTERM
    WHERE XPROJECT_ID = X.PID ; 
  END LOOP;