Oracle procedure,package,function，triger 的Flashback Query
之前对Flashback 进行了一个总结，参考：
Oracle Flashback 技术 总结
http://blog.csdn.net/xujinyang/article/details/6830438
在这篇文章里面，Flashback Query 示例中只提到了对Table的Flashback Query。
如果是其他的对象，比如function，procedure，trigger等。 这时候，就需要使用到ALL_SOURCE 表。
先看联机文档对该表的说明：
ALL_SOURCE describes the text source of the stored objects accessible to the current user.
Related Views
DBA_SOURCE describes the text source of all stored objects in the database.
USER_SOURCE describes the text source of the stored objects owned by the current user. This view does not display the OWNER column.
| Column |
Datatype |
NULL |
Description |
| OWNER |
VARCHAR2(30) |
NOT NULL |
Owner of the object |
| NAME |
VARCHAR2(30) |
NOT NULL |
Name of the object |
| TYPE |
VARCHAR2(12) |
|
Type of object: FUNCTION, JAVA SOURCE, PACKAGE, PACKAGE BODY, PROCEDURE, TRIGGER, TYPE, TYPE BODY |
| LINE |
NUMBER |
NOT NULL |
Line number of this line of source |
| TEXT |
VARCHAR2(4000) |
|
Text source of the stored object |
如果我们误删除了某些对象，如procedure，就可以使用all_source 表进行恢复。
SQL> desc dba_source
Name Null? Type
----------------------------------------- -------- ----------------------------
OWNER VARCHAR2(30)
NAME VARCHAR2(30)
TYPE VARCHAR2(12)
LINE NUMBER
TEXT VARCHAR2(4000)
查看dba_source 的所有type
SQL> select type from dba_source group by type;
TYPE
------------
PROCEDURE
PACKAGE
PACKAGE BODY
TYPE BODY
TRIGGER
FUNCTION
TYPE
7 rows selected.
基于timestamp恢复的语句
SQL>SELECT text
FROM dba_source
AS OF TIMESTAMP TO_TIMESTAMP ('XXXXX', 'YYYY-MM-DD HH24:MI:SS')
WHERE owner = 'XXXX' AND name = '你删除的对象名'
ORDER BY line;
示例：
创建函数：
SQL> CREATE OR REPLACE function getdate return date
as
v_date date;
begin
select sysdate into v_date from dual;
return v_date;
end;
/
Function created.
查询函数：
SQL> alter session set nls_date_format='yyyy-mm-dd hh24:mi:ss';
Session altered.
SQL> select getdate() from dual;
GETDATE()
-------------------
2011-04-07 21:02:09
查询dba_source 表：
SQL> select text from dba_source where name='GETDATE' order by line;
TEXT
--------------------------------------------------------------------------------
function getdate return date
as
v_date date;
begin
select sysdate into v_date from dual;
return v_date;
end;
7 rows selected.
drop 函数，在查询，记录不存在
SQL> drop function getdate;
Function dropped.
SQL> select text from dba_source where name='GETDATE' order by line;
no rows selected
使用我们的Flashback Query 查询：
SQL> select text from dba_source as of timestamp to_timestamp('2011-04-07 21:02:09','yyyy-mm-dd hh24:mi:ss') where name='GETDATE' order by line;
TEXT
--------------------------------------------------------------------------------
function getdate return date
as
v_date date;
begin
select sysdate into v_date from dual;
return v_date;
end;
7 rows selected.
这时候，又查看到了函数的代码，只需要把这些代码重新执行一下就ok了。 其他对象和这个类似。 这里就不演示了。
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