ORA-04021: 等待锁定对象时发生超时
我有这个匿名 PL/SQL 块,它计算并打印从表中返回的值.
I have this anonymous PL/SQL block which calculates and prints a value return from a table.
DECLARE
U_ID NUMBER :=39;
RETAIL BINARY_FLOAT:=1;
FLAG NUMBER;
BEGIN
SELECT NVL(RETAIL_AMOUNT,1),UNIT_ID INTO RETAIL, FLAG FROM UNITS WHERE UNIT_ID=U_ID;
LOOP
SELECT NVL(MAX(UNIT_ID),U_ID) INTO FLAG FROM UNITS WHERE FATHER_ID=FLAG;
IF FLAG=U_ID THEN EXIT; END IF;
SELECT RETAIL* RETAIL_AMOUNT INTO RETAIL FROM UNITS WHERE UNIT_ID=FLAG;
EXIT WHEN FLAG=U_ID;
END LOOP;
DBMS_OUTPUT.PUT_LINE( RETAIL);
END;
这个块可以正常工作,但我想使用 PL/SQL 函数来做同样的事情
This block work correctly, but I wanted to do the same thing using a PL/SQL Function
我写的函数如下:
CREATE OR REPLACE FUNCTION GET_UNIT_RETAIL(U_ID NUMBER)
RETURN NUMBER
IS
RETAIL BINARY_FLOAT:=1;
FLAG NUMBER;
BEGIN
SELECT NVL(RETAIL_AMOUNT,1),UNIT_ID
INTO RETAIL, FLAG
FROM UNITS
WHERE UNIT_ID=U_ID;
LOOP
SELECT NVL(MAX(UNIT_ID),U_ID)
INTO FLAG
FROM UNITS
WHERE FATHER_ID=FLAG;
IF FLAG=U_ID THEN
EXIT;
END IF;
SELECT RETAIL* RETAIL_AMOUNT
INTO RETAIL
FROM UNITS
WHERE UNIT_ID=FLAG;
EXIT WHEN FLAG=U_ID;
END LOOP;
RETURN NUMBER;
END;
/
当我尝试执行上面的代码将函数保存到数据库时,环境(SQL*PLUS)挂了很长时间,最后返回这个错误:
When I try to execute the above code to save the function to the database, the environment (SQL*PLUS) hangs for a long time and at the end returns this error:
错误在第 1 行:
ORA-04021: 等待锁定对象时发生超时
ERROR at line 1:
ORA-04021: timeout occurred while waiting to lock object
有什么问题???请!
推荐答案
听起来像ddl_lock问题
看看dba_ddl_locks
以查看谁在阻止"创建或替换.
Take a look at
dba_ddl_locks
to see who is "blocking" a create or replace.
还尝试在不同名称下创建 - 看看会发生什么.
Also try to create under different name - and see what happens.
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