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oracle drop table purge无备份bbed恢复 PDF 下载
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内容概述
oracle drop table purge后无有效备份集，信息系统面临业务数据丢失的风险，本文使用bbed工具，
针对该场景进行业务数据恢复。
2. 环境准备
create user hsql identified by hsql;
grant connect,resource,dba to hsql;
drop tablespace hsql including contents and datafiles;
create tablespace hsql datafile '/data2/enmo/hsql01.dbf' size 10M autoextend off;
drop table hsql.drop_1 purge;
create table hsql.drop_1(c_char1 char(10),c_char2 char(10)) tablespace hsql;
begin
for i in 1 .. 1000000 loop
insert into hsql.drop_1 values(i,'orastar');
end loop;
commit;
end;
/
alter system flush shared_pool;
alter system flush shared_pool;
alter system flush buffer_cache;
alter system flush buffer_cache;
select count(1) from hsql.drop_1;
3. 信息收集
set linesize 200 pagesize 200
col owner for a10
col segment_name for a10
select owner,segment_name,header_file,header_block,SEGMENT_TYPE from dba_segments where segment_name='DROP_1';
OWNER SEGMENT_NA HEADER_FILE HEADER_BLOCK SEGMENT_TYPE
---------- ---------- ----------- ------------ ------------------
HSQL DROP_1 5 130 TABLE
set linesize 200 pagesize 9999
col owner for a10
col object_name for a20
select owner,object_name,OBJECT_ID,DATA_OBJECT_ID from dba_objects where object_name='DROP_1';
OWNER OBJECT_NAME OBJECT_ID DATA_OBJECT_ID
---------- -------------------- ---------- --------------
HSQL DROP_1 13863 13863
set linesize 200 pagesize 999
col OWNER for a10
col segment_name for a20
select OWNER,segment_name,extent_id,file_id,block_id,blocks from dba_extents where segment_name ='DROP_1' order by extent_id;
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