Oracle PL/SQL:如何在长包中找到未使用的变量？

Question

请假设您有一个大约200,000行代码的Oracle PL/SQL包.

有没有快速的方法来检测声明的变量,但没有在包中使用？

提前感谢您的帮助.

编辑(2014年4月7日):我正在使用Oracle 10G.

编辑:我正在寻找一个纯PL/SQL解决方案.

Answer 1

以下仅适用于11g R2.看起来PL/Scope已经可以在11g R1中使用.

您将无法获得有关未使用变量的信息PLSQL_WARNINGS='ENABLE:ALL':

SQL> !cat test.sql
set serveroutput on

alter session set plsql_warnings = 'ENABLE:ALL';

create or replace procedure foo is
  v_a number;
  v_b varchar2(10);
begin
  dbms_output.put_line('hello world!');
end;
/
show errors

exec foo

SQL> @test

Session altered.


SP2-0804: Procedure created with compilation warnings

Errors for PROCEDURE FOO:

LINE/COL ERROR
-------- -----------------------------------------------------------------
1/1      PLW-05018: unit FOO omitted optional AUTHID clause; default
         value DEFINER used

hello world!

PL/SQL procedure successfully completed.

SQL>

如您所见,唯一报告的警告与未使用的变量无关.而是必须使用PL/Scope.

以下示例源自Oracle 11g - 使用PL/Scope生成PL/SQL编译器警告(Java样式):

SQL> alter session set plscope_settings = 'identifiers:all';

Session altered.

SQL> alter procedure foo compile;

SP2-0805: Procedure altered with compilation warnings

SQL> show errors
Errors for PROCEDURE FOO:

LINE/COL ERROR
-------- -----------------------------------------------------------------
1/1      PLW-05018: unit FOO omitted optional AUTHID clause; default
         value DEFINER used

SQL> @plsql-unused-variables.sql
Enter value for name: foo
old  10:   where  object_name = upper('&name')
new  10:   where  object_name = upper('foo')
Enter value for type: procedure
old  11:   and    object_type = upper('&type')
new  11:   and    object_type = upper('procedure')

COMPILER_WARNING
--------------------------------------------------------------------------------
V_B: variable is declared but never used (line 3)
V_A: variable is declared but never used (line 2)

SQL>

该脚本plsql-unused-variables.sql只是上面提到的博客文章的剪切和粘贴.因为我发现它很有用,所以我也在Bitbucket中提供了脚本.