如何摆脱PL / SQL过程中的编译错误?

问题描述 投票:0回答:1

是PL / SQL的新手,我无法理解如何在过程中管理用户定义的异常。我的代码给出警告“过程已完成,但有编译错误”。

CREATE OR REPLACE PROCEDURE raise_salary
(eid IN employees.e_id%TYPE:=&emp_id,
raise IN employees.salary:=&salary_raise)
IS
cnt INTEGER;
salary employees.salary%TYPE;
BEGIN
    SELECT count(*) INTO cnt FROM employees WHERE e_id=eid;
    IF cnt=0 THEN
        RAISE INVALID_ID;
    ELSE
        SELECT salary INTO sal FROM employees WHERE e_id=eid;
        IF sal IS NULL THEN
            RAISE NULL_VALUE;
        ELSE
            UPDATE employees SET salary=salary+raise WHERE e_id=eid;
            dbms_output.put_line('Salary raised!');
        END IF;
    END IF;
EXCEPTION
    WHEN INVALID_ID THEN
        dbms_output.put_line('User ID does not exist!');
    WHEN NULL_VALUE THEN
        dbms_output.put_line('Salary is null in table!');
    WHEN others THEN
        dbms_output.put_line('Error!');
END;
/
sql oracle plsql sqlplus
1个回答
0
投票

示例:

SQL> CREATE OR REPLACE PROCEDURE testException
  2  IS
  3  BEGIN
  4      raise INVALID_ID;
  5  EXCEPTION
  6      WHEN INVALID_ID THEN
  7          dbms_output.put_line('Invalid ID');
  8  END;
  9  /

Warning: Procedure created with compilation errors.

了解错误的方法:

SQL> sho err
Errors for PROCEDURE TESTEXCEPTION:

LINE/COL ERROR
-------- -----------------------------------------------------------------
0/0      PL/SQL: Compilation unit analysis terminated
4/5      PL/SQL: Statement ignored
4/11     PLS-00201: identifier 'INVALID_ID' must be declared
6/10     PLS-00201: identifier 'INVALID_ID' must be declared

您需要声明使用的异常:

SQL> CREATE OR REPLACE PROCEDURE testException
  2  IS
  3      INVALID_ID exception;
  4  BEGIN
  5      raise INVALID_ID;
  6  EXCEPTION
  7      WHEN INVALID_ID THEN
  8          dbms_output.put_line('Invalid ID');
  9  END;
 10  /

Procedure created.
© www.soinside.com 2019 - 2024. All rights reserved.