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Oracle中使用包FY_Recover_Data.pck来恢复truncate误操作的表
2022-07-06 16:23:00 【华为云】
一、简介
之前整理的内容：http://blog.itpub.net/26736162/viewspace-2082965/
误操作执行truncate后的恢复方法很多，这里再次介绍fy_recover_data包，由大师Fuyunca开发。该包采用纯plsql语句恢复被truncate掉的表，操作比较简单，包的内容参考本文后边的附录部分。
Fy_Recover_Data是利用Oracle表扫描机制、数据嫁接机制恢复TRUNCATE或者损坏数据的工具包。由纯PLSQL编写，原理图如下：
二、实验环境介绍
| 项目 | db |
|---|---|
| db 类型 | 单实例 |
| db version | 19.3.0.0 |
| db 存储 | FS |
| 主机IP地址/hosts配置 | 192.168.66.35 |
| OS版本及kernel版本 | CentOS 7.6 |
| 归档模式 | Archive Mode |
| ORACLE_SID | lhrsdb |
三、 实验代码
-- 准备数据set timing on;set serveroutput on;create table lhr.LHRTB_210702 as SELECT * FROM dba_objects;SELECT COUNT(1) FROM lhr.LHRTB_210702;INSERT INTO lhr.LHRTB_210702 SELECT * FROM lhr.LHRTB_210702;INSERT INTO lhr.LHRTB_210702 SELECT * FROM lhr.LHRTB_210702;commit;SELECT COUNT(1) FROM lhr.LHRTB_210702;SELECT d.BYTES/1024/1024 FROM dba_segments d WHERE d.segment_name ='LHRTB_210702';truncate table lhr.LHRTB_210702;SELECT COUNT(1) FROM lhr.LHRTB_210702;-- 数据已经被truncate掉了，下边我们来恢复@/tmp/FY_Recover_Data.pckexec fy_recover_data.recover_truncated_table('LHR','LHRTB_210702');SELECT COUNT(1) FROM lhr.LHRTB_210702$$;alter table lhr.LHRTB_210702 nologging;insert /*+append*/ into lhr.LHRTB_210702 select * from lhr.LHRTB_210702$$;commit;alter table lhr.LHRTB_210702 logging;SELECT COUNT(1) FROM lhr.LHRTB_210702;-- 清理数据drop tablespace FY_REC_DATA including contents and datafiles;drop tablespace FY_RST_DATA including contents and datafiles;四、实验过程
4.1、准备数据
Microsoft Windows [版本 10.0.17134.765](c) 2018 Microsoft Corporation。保留所有权利。C:\Users\lhrxxt>sqlplus sys/lhr@192.168.66.35:11521/lhrsdb as sysdbaSQL*Plus: Release 12.1.0.2.0 Production on Fri Jul 2 16:00:36 2021Copyright (c) 1982, 2014, Oracle. All rights reserved.Connected to:Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - ProductionSYS@192.168.66.35:11521/lhrsdb> set timing on;SYS@192.168.66.35:11521/lhrsdb> set serveroutput on;SYS@192.168.66.35:11521/lhrsdb>SYS@192.168.66.35:11521/lhrsdb> select * from v$version;BANNER BANNER_FULL BANNER_LEGACY CON_ID-------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------- ----------Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production 0 Version 19.3.0.0.0Elapsed: 00:00:00.15SYS@192.168.66.35:11521/lhrsdb> create user lhr identified by lhr;User created.Elapsed: 00:00:00.26SYS@192.168.66.35:11521/lhrsdb> grant dba to lhr;Grant succeeded.Elapsed: 00:00:00.12SYS@192.168.66.35:11521/lhrsdb>SYS@192.168.66.35:11521/lhrsdb> create table lhr.LHRTB_210702 as SELECT * FROM dba_objects;Table created.Elapsed: 00:00:01.83SYS@192.168.66.35:11521/lhrsdb>SYS@192.168.66.35:11521/lhrsdb> INSERT INTO lhr.LHRTB_210702 SELECT * FROM lhr.LHRTB_210702;72690 rows created.Elapsed: 00:00:00.67SYS@192.168.66.35:11521/lhrsdb>SYS@192.168.66.35:11521/lhrsdb> INSERT INTO lhr.LHRTB_210702 SELECT * FROM lhr.LHRTB_210702;145380 rows created.Elapsed: 00:00:00.91SYS@192.168.66.35:11521/lhrsdb> commit;Commit complete.Elapsed: 00:00:00.11SYS@192.168.66.35:11521/lhrsdb> SELECT COUNT(1) FROM lhr.LHRTB_210702; COUNT(1)---------- 290760Elapsed: 00:00:00.19SYS@192.168.66.35:11521/lhrsdb>SYS@192.168.66.35:11521/lhrsdb> SELECT d.BYTES/1024/1024 FROM dba_segments d WHERE d.segment_name ='LHRTB_210702';D.BYTES/1024/1024----------------- 45Elapsed: 00:00:00.604.2、执行误操作
SYS@192.168.66.35:11521/lhrsdb> truncate table lhr.LHRTB_210702;Table truncated.Elapsed: 00:00:00.59SYS@192.168.66.35:11521/lhrsdb>SYS@192.168.66.35:11521/lhrsdb> SELECT COUNT(1) FROM lhr.LHRTB_210702; COUNT(1)---------- 0Elapsed: 00:00:00.184.3、开始恢复
SYS@192.168.66.35:11521/lhrsdb> @D:\FY_Recover_Data.pckPackage created.Elapsed: 00:00:00.29Package body created.Elapsed: 00:00:00.67SYS@192.168.66.35:11521/lhrsdb> select * from v$tablespace; TS# NAME INC BIG FLA ENC CON_ID---------- ------------------------------ --- --- --- --- ---------- 1 SYSAUX YES NO YES 0 0 SYSTEM YES NO YES 0 2 UNDOTBS1 YES NO YES 0 4 USERS YES NO YES 0 3 TEMP NO NO YES 0Elapsed: 00:00:00.16SYS@192.168.66.35:11521/lhrsdb>SYS@192.168.66.35:11521/lhrsdb> exec fy_recover_data.recover_truncated_table('LHR','LHRTB_210702');16:03:26: New Directory Name: FY_DATA_DIR16:03:26: Recover Tablespace: FY_REC_DATA; Data File: FY_REC_DATA.DAT16:03:26: Restore Tablespace: FY_RST_DATA; Data File: FY_RST_DATA.DAT16:03:27: Recover Table: LHR.LHRTB_210702$16:03:27: Restore Table: LHR.LHRTB_210702$$16:03:49: Copy file of Recover Tablespace: FY_REC_DATA_COPY.DAT16:03:49: begin to recover table LHR.LHRTB_21070216:03:50: New Directory Name: TMP_HF_DIR16:03:52: Recovering data in datafile /opt/oracle/oradata/LHRSDB/users01.dbf16:03:52: Use existing Directory Name: TMP_HF_DIR16:06:25: 5662 truncated data blocks found.16:06:25: 290760 records recovered in backup table LHR.LHRTB_210702$$16:06:25: Total: 5662 truncated data blocks found.16:06:25: Total: 290760 records recovered in backup table LHR.LHRTB_210702$$16:06:25: Recovery completed.16:06:25: Data has been recovered to LHR.LHRTB_210702$$PL/SQL procedure successfully completed.Elapsed: 00:02:59.27SYS@192.168.66.35:11521/lhrsdb> SELECT COUNT(1) FROM lhr.LHRTB_210702$$; COUNT(1)---------- 290760Elapsed: 00:00:00.52SYS@192.168.66.35:11521/lhrsdb>SYS@192.168.66.35:11521/lhrsdb> alter table lhr.LHRTB_210702 nologging;Table altered.Elapsed: 00:00:00.25SYS@192.168.66.35:11521/lhrsdb>SYS@192.168.66.35:11521/lhrsdb> insert /*+append*/ into lhr.LHRTB_210702 select * from lhr.LHRTB_210702$$;290760 rows created.Elapsed: 00:00:01.99SYS@192.168.66.35:11521/lhrsdb> commit;Commit complete.Elapsed: 00:00:00.91SYS@192.168.66.35:11521/lhrsdb> alter table lhr.LHRTB_210702 logging;Table altered.Elapsed: 00:00:00.11SYS@192.168.66.35:11521/lhrsdb>SYS@192.168.66.35:11521/lhrsdb> SELECT COUNT(1) FROM lhr.LHRTB_210702; COUNT(1)---------- 290760Elapsed: 00:00:00.254.4、清理临时数据
SYS@192.168.66.35:11521/lhrsdb> select * from v$tablespace; TS# NAME INC BIG FLA ENC CON_ID---------- ------------------------------ --- --- --- --- ---------- 1 SYSAUX YES NO YES 0 0 SYSTEM YES NO YES 0 2 UNDOTBS1 YES NO YES 0 4 USERS YES NO YES 0 3 TEMP NO NO YES 0 6 FY_REC_DATA YES NO YES 0 7 FY_RST_DATA YES NO YES 07 rows selected.SYS@192.168.66.35:11521/lhrsdb> set pagesize 9999 line 9999SYS@192.168.66.35:11521/lhrsdb> col TS_Name format a30SYS@192.168.66.35:11521/lhrsdb> col PDBNAME format a15SYS@192.168.66.35:11521/lhrsdb> col TS_NAME format a20SYS@192.168.66.35:11521/lhrsdb> col LOGGING format a10SYS@192.168.66.35:11521/lhrsdb> WITH wt1 AS 2 (SELECT ts.TABLESPACE_NAME, 3 df.all_bytes, 4 decode(df.TYPE, 5 'D', 6 nvl(fs.FREESIZ, 0), 7 'T', 8 df.all_bytes - nvl(fs.FREESIZ, 0)) FREESIZ, 9 df.MAXSIZ, 10 ts.BLOCK_SIZE, 11 ts.LOGGING, 12 ts.FORCE_LOGGING, 13 ts.CONTENTS, 14 ts.EXTENT_MANAGEMENT, 15 ts.SEGMENT_SPACE_MANAGEMENT, 16 ts.RETENTION, 17 ts.DEF_TAB_COMPRESSION, 18 df.ts_df_count 19 FROM dba_tablespaces ts, 20 (SELECT 'D' TYPE, 21 TABLESPACE_NAME, 22 COUNT(*) ts_df_count, 23 SUM(BYTES) all_bytes, 24 SUM(decode(MAXBYTES, 0, BYTES, MAXBYTES)) MAXSIZ 25 FROM dba_data_files d 26 GROUP BY TABLESPACE_NAME 27 UNION ALL 28 SELECT 'T', 29 TABLESPACE_NAME, 30 COUNT(*) ts_df_count, 31 SUM(BYTES) all_bytes, 32 SUM(decode(MAXBYTES, 0, BYTES, MAXBYTES)) 33 FROM dba_temp_files d 34 GROUP BY TABLESPACE_NAME) df, 35 (SELECT TABLESPACE_NAME, 36 SUM(BYTES) FREESIZ 37 FROM dba_free_space 38 GROUP BY TABLESPACE_NAME 39 UNION ALL 40 SELECT tablespace_name, 41 SUM(d.BLOCK_SIZE * a.BLOCKS) bytes 42 FROM gv$sort_usage a, 43 dba_tablespaces d 44 WHERE a.tablespace = d.tablespace_name 45 GROUP BY tablespace_name) fs 46 WHERE ts.TABLESPACE_NAME = df.TABLESPACE_NAME 47 AND ts.TABLESPACE_NAME = fs.TABLESPACE_NAME(+)) 48 SELECT (SELECT A.TS# 49 FROM V$TABLESPACE A 50 WHERE A.NAME = UPPER(t.TABLESPACE_NAME)) TS#, 51 t.TABLESPACE_NAME TS_Name, 52 round(t.all_bytes / 1024 / 1024) ts_size_M, 53 round(t.freesiz / 1024 / 1024) Free_Size_M, 54 round((t.all_bytes - t.FREESIZ) / 1024 / 1024) Used_Size_M, 55 round((t.all_bytes - t.FREESIZ) * 100 / t.all_bytes, 3) Used_per, 56 round(MAXSIZ / 1024 / 1024/1024, 3) MAX_Size_g, 57 round(decode(MAXSIZ, 0, to_number(NULL), (t.all_bytes - FREESIZ)) * 100 / 58 MAXSIZ, 59 3) USED_per_MAX, 60 round(t.BLOCK_SIZE) BLOCK_SIZE, 61 t.LOGGING, 62 t.ts_df_count 63 FROM wt1 t 64 UNION ALL 65 SELECT to_number('') TS#, 66 'ALL TS:' TS_Name, 67 round(SUM(t.all_bytes) / 1024 / 1024, 3) ts_size_M, 68 round(SUM(t.freesiz) / 1024 / 1024) Free_Size_m, 69 round(SUM(t.all_bytes - t.FREESIZ) / 1024 / 1024) Used_Size_M, 70 round(SUM(t.all_bytes - t.FREESIZ) * 100 / SUM(t.all_bytes), 3) Used_per, 71 round(SUM(MAXSIZ) / 1024 / 1024/1024) MAX_Size, 72 to_number('') "USED,% of MAX Size", 73 to_number('') BLOCK_SIZE, 74 '' LOGGING, 75 to_number('') ts_df_count 76 FROM wt1 t 77 order by TS# 78 ; TS# TS_NAME TS_SIZE_M FREE_SIZE_M USED_SIZE_M USED_PER MAX_SIZE_G USED_PER_MAX BLOCK_SIZE LOGGING TS_DF_COUNT---------- -------------------- ---------- ----------- ----------- ---------- ---------- ------------ ---------- ---------- ----------- 0 SYSTEM 910 4 906 99.54 32 2.764 8192 LOGGING 1 1 SYSAUX 670 30 640 95.476 32 1.952 8192 LOGGING 1 2 UNDOTBS1 345 271 74 21.413 32 .225 8192 LOGGING 1 3 TEMP 33 27 6 18.182 32 .018 8192 NOLOGGING 1 4 USERS 344 2 341 99.291 32 1.042 8192 LOGGING 1 6 FY_REC_DATA 0 0 0 100 0 100 8192 LOGGING 1 7 FY_RST_DATA 57 3 54 95.154 32 .165 8192 LOGGING 1 ALL TS: 2358.625 338 2021 85.678 1928 rows selected.Elapsed: 00:00:00.59SYS@192.168.66.35:11521/lhrsdb>SYS@192.168.66.35:11521/lhrsdb> drop tablespace FY_REC_DATA including contents and datafiles;Tablespace dropped.Elapsed: 00:00:12.01SYS@192.168.66.35:11521/lhrsdb>SYS@192.168.66.35:11521/lhrsdb>SYS@192.168.66.35:11521/lhrsdb> drop tablespace FY_RST_DATA including contents and datafiles;Tablespace dropped.Elapsed: 00:00:11.43SYS@192.168.66.35:11521/lhrsdb> drop table lhr.LHRTB_210702$$;drop table lhr.LHRTB_210702$$ *ERROR at line 1:ORA-00942: table or view does not existElapsed: 00:00:00.15SYS@192.168.66.35:11521/lhrsdb>总体而言用fy_recover_data包是非常好的，fy_recover_data可以恢复truncate的数据，但不能恢复drop的数据。
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