Question

我只想使用替换变量来获取customer_name（varchar2），但是当我执行下面的子程序时，它会引发异常。

DECLARE
    v_cid     dummytest.customer_id%type := &customer_id;
    v_cname   dummytest.customer_name%type := &customer_name;
BEGIN
    INSERT INTO dummytest ( customer_id,customer_name ) VALUES ( v_cid,v_cname );

    COMMIT;
END;

错误

Error report -
ORA-06550: line 3, column 47:
PLS-00201: identifier 'HUHU' must be declared
ORA-06550: line 3, column 15:
PL/SQL: Item ignored
ORA-06550: line 5, column 72:
PLS-00320: the declaration of the type of this expression is incomplete or malformed
ORA-06550: line 5, column 72:
PL/SQL: ORA-00904: "V_CNAME": invalid identifier
ORA-06550: line 5, column 5:
PL/SQL: SQL Statement ignored
06550. 00000 -  "line %s, column %s:\n%s"
*Cause:    Usually a PL/SQL compilation error.
*Action:

但是当我给出数字值并成功插入时。

Answer 1

首先发生替换，所以接下来......

v_cname   dummytest.customer_name%type := &customer_name;

... ...变为

v_cname   dummytest.customer_name%type := HUHU;

...由于缺少单引号而不是字符串，而是编译器无法确定源的标识符。

所以，如果你包括字符串（VARCHAR2）替换的引号，则以下......

v_cname   dummytest.customer_name%type := '&customer_name';

... ...变为

v_cname   dummytest.customer_name%type := 'HUHU';

...这是你要找的字符串。

它适用于数字，因为数字类型不需要引号。

Answer 2

在解析和执行脚本之前，在您的SQL脚本中使用给定的输入替换替换变量;因此，你必须在字符串替换变量周围放置单引号，这样它们最终会成为字符串文字。

 v_cname   dummytest.customer_name%type := '&customer_name';

Oracle替换变量不适用于varchar2

2 个答案: