Oracle plsql switch case 和 sqlplus 假脱机

Question

以下查询在 THAN 语句处运行时出错。是否可以在 THAN 语句中使用 select？关于如何使其工作的任何想法？

SET SERVEROUTPUT ON
SET TERMOUT  OFF
SET ECHO     OFF
SET FEEDBACK OFF
SET LINESIZE 140
SET PAGESIZE 0  

exec dbms_output.enable(NULL);

SPOOL C:\test\user.sql

BEGIN

SELECT DISTINCT version,
  CASE
  WHEN version = '12.1.0.2.0' 
  THEN 
     dbms_output.put_line(''select' || 'Alter user ' || username || ' identified by values ' ||  '''EE3FD1E715941451''' || ';''); from DBA_USERS_WITH_DEFPWD;
  ELSE 
     dbms_output.put_line(''select' || 'Alter user ' || username || ' identified by values ' ||  '''Invalid Password''' || ';''); from DBA_USERS_WITH_DEFPWD;
FROM PRODUCT_COMPONENT_VERSION;
END; 

SPOOL OFF

编辑：

正在运行的代码如下所示：

spool c:/test/user.sql

select 'Alter user ' || username || ' identified by values ' ||  '''Invalid Password''' || ';'
   from DBA_USERS_WITH_DEFPWD;

spool off

假脱机输出示例：

Alter user GSMUSER identified by values 'Invalid Password';
Alter user MDSYS identified by values 'Invalid Password';
Alter user OLAPSYS identified by values 'Invalid Password';
Alter user LBACSYS identified by values 'Invalid Password';

该脚本不适用于新的 Oracle 数据库版本。从 Oracle 12.1.0.2.0 开始，无法将密码设置为无效密码。我需要为这个问题建立版本识别。所有版本低于 12.1.0.2.0 的 Oracle 数据库都应使用旧脚本处理，密码应设置为“无效密码”。所有较新的版本现在都应该获得某种标准密码。

Answer 1

也许你需要这样的东西：

...
DECLARE
    vVersion varchar2(100);
BEGIN    
    /* get the version */
    SELECT DISTINCT version
    into vVersion
    from PRODUCT_COMPONENT_VERSION;
    --
    /* loop through users */
    for i in ( select * from DBA_USERS_WITH_DEFPWD) loop
        /* print a different statement, based on vVersion, for the current user */
        if ( vVersion = '12.1.0.2.0' ) then
            dbms_output.put_line('Alter user ' || i.username || ' identified by values ' ||  '''EE3FD1E715941451''' || ';');
        else
            dbms_output.put_line('Alter user ' || i.username || ' identified by values ' ||  '''Invalid Password''' || ';');
        end if;
    end loop;
END; 
...

Answer 2

如果无法使用PL/SQL:

SET TERMOUT  OFF
SET ECHO     OFF
SET LINESIZE 140
SET FEEDBACK OFF
SET PAGESIZE 0

spool user.sql

SELECT    'Alter user '
       || A.USERNAME
       || ' identified by values '
       || '''EE3FD1E715941451'''
       || ';'
  FROM DBA_USERS_WITH_DEFPWD a,
       (SELECT DISTINCT version
          FROM PRODUCT_COMPONENT_VERSION) b
 WHERE version = '12.1.0.2.0'
UNION ALL
SELECT    'Alter user '
       || A.USERNAME
       || ' identified by values '
       || '''Invalid Password'''
       || ';'
  FROM DBA_USERS_WITH_DEFPWD a,
       (SELECT DISTINCT version
          FROM PRODUCT_COMPONENT_VERSION) b
 WHERE version != '12.1.0.2.0';


 spool off
 @user.sql

Answer 3

另一个版本解决了没有 PL/SQL 和正确假脱机的问题：

SET TERMOUT  OFF
SET ECHO     OFF
SET LINESIZE 140
SET FEEDBACK OFF
SET PAGESIZE 0

SPOOL user.sql

SELECT    'alter user ' || username || ' identified by values '''
       || CASE
             WHEN b.version = '12.1.0.2.0' THEN '462368EA9F7AD215'
             ELSE 'Invalid Password'
          END
       || ''';'
  FROM DBA_USERS_WITH_DEFPWD a,
       (SELECT VERSION
          FROM PRODUCT_COMPONENT_VERSION
         WHERE UPPER (product) LIKE '%DATABASE%') b;

SPOOL OFF
@user.sql

Oracle plsql switch case 和 sqlplus 假脱机

Oracle plsql switch case and sqlplus spool

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