当我尝试使用此过程更改过程MY_PRC时，为什么会出现“ ORA-00940：无效的ALTER命令”？

问题描述

CREATE OR REPLACE PROCEDURE COMPILE_OBJECT(my_type VARCHAR2,my_name VARCHAR2,my_package_part VARCHAR2 := NULL) IS
    v_text VARCHAR2(500) := 'ALTER :my_type :my_name COMPILE :my_package_part';
BEGIN
    --try alter objects
    EXECUTE IMMEDIATE v_text USING my_type,my_name,my_package_part;   
END;

解决方法

就像Sayan所说的那样，是这样的：

SQL> CREATE OR REPLACE PROCEDURE compile_object (
  2     my_type           VARCHAR2,3     my_name           VARCHAR2,4     my_package_part   VARCHAR2 := NULL)
  5  IS
  6     v_text  VARCHAR2 (500);
  7  BEGIN
  8     v_text :=
  9           'alter '
 10        || my_type
 11        || ' '
 12        || DBMS_ASSERT.sql_object_name (my_name)
 13        || ' compile '
 14        || my_package_part;
 15
 16     EXECUTE IMMEDIATE v_text;
 17  END;
 18  /

Procedure created.

SQL> EXEC compile_object('procedure','p_roles',null);

PL/SQL procedure successfully completed.

SQL>