今天看了下oracle12c 的 In-Database Archiving – Row-archival ，做了下实验 环境准备 SQL CREATE TABLE row_arch (id NUMBER,name varchar2(30),addr varchar2(30),phone NUMBER);?TABLE created.?SQL INSERT INTO row_arch VALUES (100,'travel1','beiji
今天看了下oracle12c 的 In-Database Archiving – Row-archival ，做了下实验
环境准备
SQL> CREATE TABLE row_arch (id NUMBER,name varchar2(30),addr varchar2(30),phone NUMBER);
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TABLE created.
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SQL> INSERT INTO row_arch VALUES (100,'travel1','beijing','100')
2 ;
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1 ROW created.
?
SQL> INSERT INTO row_arch VALUES (101,'travel2','beijing2','100')
2 ;
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1 ROW created.
?
SQL> INSERT INTO row_arch VALUES (102,'travel3','beijing2','100');
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1 ROW created.
?
SQL> INSERT INTO row_arch VALUES (103,'travel4','beijing2','100');
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1 ROW created.
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SQL> commit;
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Commit complete.
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SQL> @DESC row_arch
Name NULL? TYPE
------------------------------- -------- ----------------------------
1 ID NUMBER
2 NAME VARCHAR2(30)
3 ADDR VARCHAR2(30)
4 PHONE NUMBER
开启row archival
SQL> ALTER TABLE row_arch ROW ARCHIVAL;
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TABLE altered.
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SQL> col name FOR a10
SQL> col addr FOR a15
SQL> col ORA_ARCHIVE_STATE FOR a10
SQL> SELECT t.*,ORA_ARCHIVE_STATE FROM row_arch t;
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ID NAME ADDR PHONE ORA_ARCHIV
---------- ---------- --------------- ---------- ----------
100 travel1 beijing 100 0
101 travel2 beijing2 100 0
102 travel3 beijing2 100 0
103 travel4 beijing2 100 0
?
?
SQL> SELECT t.*,ORA_ARCHIVE_STATE,rowid FROM row_arch t;
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ID NAME ADDR PHONE ORA_ARCHIV ROWID
---------- ---------- --------------- ---------- ---------- ------------------
100 travel1 beijing 100 0 AAAWegAAGAAAADdAAA
101 travel2 beijing2 100 0 AAAWegAAGAAAADdAAB
102 travel3 beijing2 100 0 AAAWegAAGAAAADdAAC
103 travel4 beijing2 100 0 AAAWegAAGAAAADdAAD
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SQL> @lookup_rowid AAAWegAAGAAAADdAAA
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+------------------------------------------------------------------------+
| Report : lookup_rowid.SQL |
| Instance : noncdb |
| USER : TRAVEL |
+------------------------------------------------------------------------+
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ROWID: AAAWegAAGAAAADdAAA
Object#: 92064
RelFile#: 6
Block#: 221
ROW#: 0
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PL/SQL PROCEDURE successfully completed.
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SQL> @dump 6 221
?
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NEW tracefile_identifier=/u01/app/oracle/diag/rdbms/noncdb/noncdb/trace/noncdb_ora_3526_0001.trc
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SQL>
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SQL> @seg row_arch
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OWNER SEGMENT_NAME SEG_PART_NAME SEGMENT_TYPE SEG_TABLESPACE_NAME SEG_MB
-------------------- ------------------------------ ------------------------------ -------------------- ------------------------------------------------------------ ----------
BLOCKS HDRFIL HDRBLK
---------- ---------- ----------
TRAVEL ROW_ARCH TABLE USERS .06
8 6 218
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SQL> /
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FILE# NAME
---------- --------------------------------------------------
1 /oradata/noncdb/system01.dbf
2 /oradata/noncdb/ado_t1.dbf
3 /oradata/noncdb/sysaux01.dbf
4 /oradata/noncdb/undotbs01.dbf
5 /oradata/noncdb/ado_t2.dbf
6 /oradata/noncdb/users01.dbf
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6 ROWS selected.
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SQL> ALTER system dump datafile 6 block 221;
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System altered.
查看下block dump
Block header dump: 0x018000dd
Object id on Block? Y
seg/obj: 0x167a0 csc: 0x00.1ce0a2 itc: 2 flg: E typ: 1 - DATA
brn: 0 bdba: 0x18000d8 ver: 0x01 opc: 0
inc: 0 exflg: 0
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Itl Xid Uba Flag Lck Scn/Fsc
0x01 0x0006.008.00000671 0x010037ca.00c7.2c --U- 4 fsc 0x0000.001ce0b1
0x02 0x0000.000.00000000 0x00000000.0000.00 ---- 0 fsc 0x0000.00000000
bdba: 0x018000dd
data_block_dump,data header at 0x7f10171b6264
===============
tsiz: 0x1f98
hsiz: 0x1a
pbl: 0x7f10171b6264
76543210
flag=--------
ntab=1
nrow=4
frre=-1
fsbo=0x1a
fseo=0x1f2e
avsp=0x1f14
tosp=0x1f14
0xe:pti[0] nrow=4 offs=0
0x12:pri[0] offs=0x1f7f
0x14:pri[1] offs=0x1f64
0x16:pri[2] offs=0x1f49
0x18:pri[3] offs=0x1f2e
block_row_dump:
tab 0, row 0, @0x1f7f
tl: 25 fb: --H-FL-- lb: 0x1 cc: 4
col 0: [ 2] c2 02
col 1: [ 7] 74 72 61 76 65 6c 31
col 2: [ 7] 62 65 69 6a 69 6e 67
col 3: [ 2] c2 02
tab 0, row 1, @0x1f64
tl: 27 fb: --H-FL-- lb: 0x1 cc: 4
col 0: [ 3] c2 02 02
col 1: [ 7] 74 72 61 76 65 6c 32
col 2: [ 8] 62 65 69 6a 69 6e 67 32
col 3: [ 2] c2 02
tab 0, row 2, @0x1f49
tl: 27 fb: --H-FL-- lb: 0x1 cc: 4
col 0: [ 3] c2 02 03
col 1: [ 7] 74 72 61 76 65 6c 33
col 2: [ 8] 62 65 69 6a 69 6e 67 32
col 3: [ 2] c2 02
tab 0, row 3, @0x1f2e
tl: 27 fb: --H-FL-- lb: 0x1 cc: 4
col 0: [ 3] c2 02 04
col 1: [ 7] 74 72 61 76 65 6c 34
col 2: [ 8] 62 65 69 6a 69 6e 67 32
col 3: [ 2] c2 02
end_of_block_dump
End dump data blocks tsn: 4 file#: 6 minblk 221 maxblk 221
在没有进行归档之前数据存储和普通块一样，下面进行归档
SQL> UPDATE row_arch SET ORA_ARCHIVE_STATE=DBMS_ILM.ARCHIVESTATENAME(1) WHERE id IN (100,101);
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2 ROWS updated.
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SQL> commit;
?
Commit complete.
?
?
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SQL> ALTER SESSION SET ROW ARCHIVAL VISIBILITY = ALL;
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SESSION altered.
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SQL> SELECT t.*,ORA_ARCHIVE_STATE,rowid FROM row_arch t;
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ID NAME ADDR PHONE ORA_ARCHIV ROWID
---------- ---------- ---------- ---------- ---------- ------------------
100 travel1 beijing 100 1 AAAWegAAGAAAADdAAA
101 travel2 beijing2 100 1 AAAWegAAGAAAADdAAB
102 travel3 beijing2 100 0 AAAWegAAGAAAADdAAC
103 travel4 beijing2 100 0 AAAWegAAGAAAADdAAD
?
SQL>
?
?
?
SQL> SELECT t.*,ORA_ARCHIVE_STATE,rowid FROM row_arch t;
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ID NAME ADDR PHONE ORA_ARCHIV ROWID
---------- ---------- ---------- ---------- ---------- ------------------
102 travel3 beijing2 100 0 AAAWegAAGAAAADdAAC
103 travel4 beijing2 100 0 AAAWegAAGAAAADdAAD
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SQL> ALTER SESSION SET ROW ARCHIVAL VISIBILITY = ALL;
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SESSION altered.
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SQL> SELECT t.*,ORA_ARCHIVE_STATE,rowid FROM row_arch t;
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ID NAME ADDR PHONE ORA_ARCHIV ROWID
---------- ---------- ---------- ---------- ---------- ------------------
100 travel1 beijing 100 1 AAAWegAAGAAAADdAAA
101 travel2 beijing2 100 1 AAAWegAAGAAAADdAAB
102 travel3 beijing2 100 0 AAAWegAAGAAAADdAAC
103 travel4 beijing2 100 0 AAAWegAAGAAAADdAAD
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SQL> ALTER system checkpoint;
?
System altered.
?
SQL> ALTER system FLUSH buffer_Cachel
2
SQL> ALTER system FLUSH buffer_Cache;
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System altered.
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SQL> ALTER system dump datafile 6 block 221;
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System altered.
可以看到在归档后，在没有设置ROW ARCHIVAL VISIBILITY = ALL之前是看不到归档的数据，看下dump
Block header dump: 0x018000dd
Object id on Block? Y
seg/obj: 0x167a0 csc: 0x00.1ce60f itc: 2 flg: E typ: 1 - DATA
brn: 0 bdba: 0x18000d8 ver: 0x01 opc: 0
inc: 0 exflg: 0
?
Itl Xid Uba Flag Lck Scn/Fsc
0x01 0x0006.008.00000671 0x010037ca.00c7.2c C--- 0 scn 0x0000.001ce0b1
0x02 0x0005.001.00000629 0x01003f2a.00e9.24 --U- 2 fsc 0x0000.001ce610
bdba: 0x018000dd
data_block_dump,data header at 0x7f10171b6264
===============
tsiz: 0x1f98
hsiz: 0x1a
pbl: 0x7f10171b6264
76543210
flag=--------
ntab=1
nrow=4
frre=-1
fsbo=0x1a
fseo=0x1ef2
avsp=0x1f0c
tosp=0x1f0c
0xe:pti[0] nrow=4 offs=0
0x12:pri[0] offs=0x1f11
0x14:pri[1] offs=0x1ef2
0x16:pri[2] offs=0x1f49
0x18:pri[3] offs=0x1f2e
block_row_dump:
tab 0, row 0, @0x1f11
tl: 29 fb: --H-FL-- lb: 0x2 cc: 6
col 0: [ 2] c2 02
col 1: [ 7] 74 72 61 76 65 6c 31
col 2: [ 7] 62 65 69 6a 69 6e 67
col 3: [ 2] c2 02
col 4: [ 1] 01
col 5: [ 1] 31
tab 0, row 1, @0x1ef2
tl: 31 fb: --H-FL-- lb: 0x2 cc: 6
col 0: [ 3] c2 02 02
col 1: [ 7] 74 72 61 76 65 6c 32
col 2: [ 8] 62 65 69 6a 69 6e 67 32
col 3: [ 2] c2 02
col 4: [ 1] 01
col 5: [ 1] 31
tab 0, row 2, @0x1f49
tl: 27 fb: --H-FL-- lb: 0x0 cc: 4
col 0: [ 3] c2 02 03
col 1: [ 7] 74 72 61 76 65 6c 33
col 2: [ 8] 62 65 69 6a 69 6e 67 32
col 3: [ 2] c2 02
tab 0, row 3, @0x1f2e
tl: 27 fb: --H-FL-- lb: 0x0 cc: 4
col 0: [ 3] c2 02 04
col 1: [ 7] 74 72 61 76 65 6c 34
col 2: [ 8] 62 65 69 6a 69 6e 67 32
col 3: [ 2] c2 02
end_of_block_dump
End dump data blocks tsn: 4 file#: 6 minblk 221 maxblk 221
oracle在归档的行增加了2列，查看下这两列是干什么的
SQL> col owner FOR a10
SQL> col TABLE_NAME FOR a10
SQL> col COLUMN_NAME FOR a15
SQL> col COLUMN_ID fro a10
SQL> col COLUMN_ID FOR a10
SQL> col COLUMN_ID FOR 9999
?
?
SQL> SELECT OWNER,TABLE_NAME,COLUMN_NAME,COLUMN_ID FROM DBA_TAB_COLS WHERE TABLE_NAME='ROW_ARCH';
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OWNER TABLE_NAME COLUMN_NAME COLUMN_ID
---------- ---------- --------------- ---------
TRAVEL ROW_ARCH ORA_ARCHIVE_STA
TE
?
TRAVEL ROW_ARCH SYS_NC00005$
TRAVEL ROW_ARCH PHONE 4
TRAVEL ROW_ARCH ADDR 3
TRAVEL ROW_ARCH NAME 2
TRAVEL ROW_ARCH ID 1
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6 ROWS selected.
?
?
?
SQL> col NAME FOR a15
SQL> col DEFAULT$ FOR a10
SQL> col SPARE4 FOR a1
SQL> col SPARE5 FOR a1
SQL> col SPARE6 FOR a1
SQL> SELECT * FROM col$ WHERE obj#='92064';
?
OBJ# COL# SEGCOL# SEGCOLLENGTH OFFSET NAME TYPE# LENGTH FIXEDSTORAGE PRECISION# SCALE NULL$ DEFLENGTH DEFAULT$ INTCOL# PROPERTY CHARSETID CHARSETFORM EVALEDITION# UNUSABLEBEFORE# UNUSABLEBEGINNING# SPARE1 SPARE2 SPARE3 S S S SPARE7 SPARE8
---------- ---------- ---------- ------------ ---------- --------------- ---------- ---------- ------------ ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ----------- ------------ --------------- ------------------ ---------- ---------- ---------- - - - ---------- ----------
92064 1 1 22 0 ID 2 22 0 0 1 0 0 0 0 0 0 0
92064 2 2 30 0 NAME 1 30 0 0 2 0 873 1 0 0 0 30
92064 3 3 30 0 ADDR 1 30 0 0 3 0 873 1 0 0 0 30
92064 4 4 22 0 PHONE 2 22 0 0 4 0 0 0 0 0 0 0
92064 0 5 126 0 SYS_NC00005$ 23 126 0 0 5 5.4976E+11 0 0 0 0 0 0
92064 0 6 4000 0 ORA_ARCHIVE_STA 1 4000 0 0 1 0 6 2.2001E+12 873 1 0 0 0 4000
TE
?
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6 ROWS selected.
可以看出oracle在底层col$里增加了2列,并设置col#为0，不可正常看到
SQL> @v DBA_TAB_COLS
SHOW SQL text OF views matching "%DBA_TAB_COLS%"...
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VIEW_NAME TEXT
------------------------------ ----------------------------------------------------------------------------------------------------
DBA_TAB_COLS_V$ SELECT u.name, o.name,
c.name,
decode(c.TYPE#, 1, decode(c.charsetform, 2, 'NVARCHAR2', 'VARCHAR2'),
2, decode(c.scale, NULL,
decode(c.PRECISION#, NULL, 'NUMBER', 'FLOAT'),
'NUMBER'),
8, 'LONG',
9, decode(c.charsetform, 2, 'NCHAR VARYING', 'VARCHAR'),
12, 'DATE',
23, 'RAW', 24, 'LONG RAW',
58, nvl2(ac.synobj#, (SELECT o.name FROM obj$ o
WHERE o.obj#=ac.synobj#), ot.name),
69, 'ROWID',
96, decode(c.charsetform, 2, 'NCHAR', 'CHAR'),
100, 'BINARY_FLOAT',
101, 'BINARY_DOUBLE',
105, 'MLSLABEL',
106, 'MLSLABEL',
111, nvl2(ac.synobj#, (SELECT o.name FROM obj$ o
WHERE o.obj#=ac.synobj#), ot.name),
112, decode(c.charsetform, 2, 'NCLOB', 'CLOB'),
113, 'BLOB', 114, 'BFILE', 115, 'CFILE',
121, nvl2(ac.synobj#, (SELECT o.name FROM obj$ o
WHERE o.obj#=ac.synobj#), ot.name),
122, nvl2(ac.synobj#, (SELECT o.name FROM obj$ o
WHERE o.obj#=ac.synobj#), ot.name),
123, nvl2(ac.synobj#, (SELECT o.name FROM obj$ o
WHERE o.obj#=ac.synobj#), ot.name),
178, 'TIME(' ||c.scale|| ')',
179, 'TIME(' ||c.scale|| ')' || ' WITH TIME ZONE',
180, 'TIMESTAMP(' ||c.scale|| ')',
181, 'TIMESTAMP(' ||c.scale|| ')' || ' WITH TIME ZONE',
231, 'TIMESTAMP(' ||c.scale|| ')' || ' WITH LOCAL TIME ZONE',
182, 'INTERVAL YEAR(' ||c.PRECISION#||') TO MONTH',
183, 'INTERVAL DAY(' ||c.PRECISION#||') TO SECOND(' ||
c.scale || ')',
208, 'UROWID',
'UNDEFINED'),
decode(c.TYPE#, 111, 'REF'),
nvl2(ac.synobj#, (SELECT u.name FROM "_BASE_USER" u, obj$ o
WHERE o.owner#=u.USER# AND o.obj#=ac.synobj#),
ut.name),
c.LENGTH, c.PRECISION#, c.scale,
decode(sign(c.NULL$),-1,'D', 0, 'Y', 'N'),
decode(c.col#, 0, to_number(NULL), c.col#), --这里col#为0则转换为null
c.deflength,
c.DEFAULT$, h.distcnt,
CASE WHEN SYS_OP_DV_CHECK(o.name, o.owner#) = 1
THEN h.lowval
ELSE NULL
END,
CASE WHEN SYS_OP_DV_CHECK(o.name, o.owner#) = 1
THEN h.hival
ELSE NULL
END,
h.density, h.null_cnt,
CASE WHEN nvl(h.distcnt,0) = 0 THEN h.distcnt
-- no histogram
WHEN h.row_cnt = 0 THEN 1
-- hybrid
WHEN EXISTS(SELECT 1 FROM sys.histgrm$ hg
WHERE c.obj# = hg.obj# AND c.intcol# = hg.intcol#
AND hg.ep_repeat_count > 0 AND rownum 0
THEN h.row_cnt
-- freq
WHEN (bitand(h.spare2, 32) > 0 OR h.bucket_cnt > 2049 OR
(h.bucket_cnt >= h.distcnt AND h.density*h.bucket_cnt 0 AND rownum 0
THEN 'TOP-FREQUENCY'
WHEN (bitand(h.spare2, 32) > 0 OR h.bucket_cnt > 2049 OR
(h.bucket_cnt >= h.distcnt AND h.density*h.bucket_cnt
<p>测试下odu</p>
- 数据字典存在
[oracle@localhost odu]$ ./odu
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Oracle Data Unloader:Release 4.3.3
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Copyright (c) 2008-2014 XiongJun. All rights reserved.
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Web: http://www.oracleodu.com
Email: magic007cn@gmail.com
?
loading default config.......
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byte_order little
block_size 8192
block_buffers 1024
db_timezone -7
Invalid db timezone:-7
client_timezone 8
Invalid client timezone:8
asmfile_extract_path /asmfile
data_path data
lob_path /odu/data/lob
charset_name US7ASCII
ncharset_name AL16UTF16
output_format text
lob_storage infile
clob_byte_order big
trace_level 1
delimiter |
unload_deleted no
file_header_offset 0
is_tru64 no
record_row_addr no
convert_clob_charset yes
use_scanned_lob yes
trim_scanned_blob yes
lob_switch_dir_rows 20000
db_block_checksum yes
db_block_checking yes
rdba_file_bits 10
compatible 10
load config file 'config.txt' successful
loading default asm disk file ......
?
?
grp# dsk# bsize ausize disksize diskname groupname path
---- ---- ----- ------ -------- --------------- --------------- --------------------------------------------
?
load asm disk file 'asmdisk.txt' successful
loading default control file ......
?
?
ts# fn rfn bsize blocks bf offset filename
---- ---- ---- ----- -------- -- ------ --------------------------------------------
0 1 1 8192 99840 N 0 /oradata/noncdb/system01.dbf
6 2 2 8192 25600 N 0 /oradata/noncdb/ado_t1.dbf
1 3 3 8192 98560 N 0 /oradata/noncdb/sysaux01.dbf
2 4 4 8192 18560 N 0 /oradata/noncdb/undotbs01.dbf
7 5 5 8192 51200 N 0 /oradata/noncdb/ado_t2.dbf
4 6 6 8192 8160 N 0 /oradata/noncdb/users01.dbf
load control file 'oductl.dat' successful
loading dictionary data......done
?
loading scanned data......done
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ODU> unload dict
CLUSTER C_USER# file_no: 1 block_no: 208
TABLE OBJ$ obj_no: 18 file_no: 1 block_no: 240
CLUSTER C_OBJ# file_no: 1 block_no: 144
CLUSTER C_OBJ# file_no: 1 block_no: 144
found IND$'s obj# 19
found IND$'s dataobj#:2,ts#:0,file#:1,block#:144,tab#:3
found TABPART$'s obj# 694
found TABPART$'s dataobj#:694,ts#:0,file#:1,block#:4712,tab#:0
found INDPART$'s obj# 699
found INDPART$'s dataobj#:699,ts#:0,file#:1,block#:4752,tab#:0
found TABSUBPART$'s obj# 706
found TABSUBPART$'s dataobj#:706,ts#:0,file#:1,block#:4808,tab#:0
found INDSUBPART$'s obj# 711
found INDSUBPART$'s dataobj#:711,ts#:0,file#:1,block#:4848,tab#:0
found IND$'s obj# 19
found IND$'s dataobj#:2,ts#:0,file#:1,block#:144,tab#:3
found LOB$'s obj# 108
found LOB$'s dataobj#:2,ts#:0,file#:1,block#:144,tab#:6
found LOBFRAG$'s obj# 727
found LOBFRAG$'s dataobj#:727,ts#:0,file#:1,block#:4976,tab#:0
ODU> desc travel.row_arch
?
?
Object ID:92064
Storage(Obj#=92064 DataObj#=92064 TS#=4 File#=6 Block#=218 Cluster=0)
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NO. SEG INT Column Name Null? Type
--- --- --- ------------------------------ --------- ------------------------------
0 5 5 SYS_NC00005$ RAW(126)
0 6 6 ORA_ARCHIVE_STATE VARCHAR2(4000)
1 1 1 ID NUMBER
2 2 2 NAME VARCHAR2(30)
3 3 3 ADDR VARCHAR2(30)
4 4 4 PHONE NUMBER
?
ODU> unload table travel.row_arch
?
Unloading table: ROW_ARCH,object ID: 92064 at 2014-05-26 21:05:04
Unloading segment,storage(Obj#=92064 DataObj#=92064 TS#=4 File#=6 Block#=218 Cluster=0)
?
Table ROW_ARCH 4 rows unloaded
At 2014-05-26 21:05:04
?
ODU> quit
Invalid command.
ODU> exit
ODU>
[oracle@localhost odu]$ ls -l
total 10232
-rwxr-xr-x 1 oracle oinstall 90 Mar 22 2011 asmdisk.txt
-rw-r--r-- 1 oracle oinstall 4447252 May 26 21:04 col.odu
-rwxr-xr-x 1 oracle oinstall 559 Apr 7 2011 config.txt
-rwxr-xr-x 1 oracle oinstall 492 May 26 20:38 control.txt
drwxr-xr-x 2 oracle oinstall 4096 May 26 21:05 data
-rw-r--r-- 1 oracle oinstall 55429 May 26 21:04 ind.odu
-rw-r--r-- 1 oracle oinstall 352 May 26 21:04 lobfrag.odu
-rw-r--r-- 1 oracle oinstall 34234 May 26 21:04 lob.odu
-rw-r--r-- 1 oracle oinstall 3420310 May 26 21:04 obj.odu
-rwxr-xr-x 1 oracle oinstall 2306912 Apr 7 12:09 odu
-rw-r--r-- 1 oracle oinstall 1051 May 26 21:04 oductl.dat
-rw-r--r-- 1 oracle oinstall 295 May 26 20:38 oductl.txt
-rw-r--r-- 1 oracle oinstall 0 May 26 20:38 odu_trace.txt
-rw-r--r-- 1 oracle oinstall 137024 May 26 21:04 tab.odu
-rw-r--r-- 1 oracle oinstall 2170 May 26 21:04 user.odu
[oracle@localhost odu]$ cd data/
[oracle@localhost data]$ ls -l
total 12
-rw-r--r-- 1 oracle oinstall 323 May 26 21:05 TRAVEL_ROW_ARCH.ctl
-rw-r--r-- 1 oracle oinstall 128 May 26 21:05 TRAVEL_ROW_ARCH.sql
-rw-r--r-- 1 oracle oinstall 99 May 26 21:05 TRAVEL_ROW_ARCH.txt
[oracle@localhost data]$ cat TRAVEL_ROW_ARCH.txt
100|travel1|beijing|100
101|travel2|beijing2|100
102|travel3|beijing2|100
103|travel4|beijing2|100
[oracle@localhost data]$ cat TRAVEL_ROW_ARCH.sql
CREATE TABLE "TRAVEL"."ROW_ARCH"
(
"ID" NUMBER ,
"NAME" VARCHAR2(30) ,
"ADDR" VARCHAR2(30) ,
"PHONE" NUMBER
);
[oracle@localhost data]$
ODU> scan extent tablespace 4;
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scan extent start: 2014-05-26 21:39:18
scanning extent...
scanning extent finished.
scan extent completed: 2014-05-26 21:39:18
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ODU> uload object all sample;
Invalid command.
ODU> unload object all sample
?
Unloading Object,object ID: 73633, Cluster: 0
output data is in file : 'ODU_0000073633.txt'
?
Sample result:
object id: 73633
tablespace no: 4
sampled 8 rows
column count: 4
column 1 type: NUMBER
column 2 type: NUMBER
column 3 type: VARCHAR2
column 4 type: NUMBER
?
COMMAND:
unload object 73633 tablespace 4 column NUMBER NUMBER VARCHAR2 NUMBER
?
?
Unloading Object,object ID: 73634, Cluster: 0
output data is in file : 'ODU_0000073634.txt'
block is not a iot index block
?
Sample result:
object id: 73634
tablespace no: 4
no data.
?
?
Unloading Object,object ID: 73635, Cluster: 0
output data is in file : 'ODU_0000073635.txt'
?
Sample result:
object id: 73635
tablespace no: 4
sampled 3 rows
column count: 7
column 1 type: NUMBER
column 2 type: NUMBER
column 3 type: NUMBER
column 4 type: DATE
column 5 type: DATE
column 6 type: VARCHAR2
column 7 type: NUMBER
?
COMMAND:
unload object 73635 tablespace 4 column NUMBER NUMBER NUMBER DATE DATE VARCHAR2 NUMBER
?
?
Unloading Object,object ID: 73636, Cluster: 0
output data is in file : 'ODU_0000073636.txt'
block is not a iot index block
?
Sample result:
object id: 73636
tablespace no: 4
no data.
?
?
Unloading Object,object ID: 73643, Cluster: 0
output data is in file : 'ODU_0000073643.txt'
?
Sample result:
object id: 73643
tablespace no: 4
sampled 9 rows
column count: 3
column 1 type: NUMBER
column 2 type: NUMBER
column 3 type: VARCHAR2
?
COMMAND:
unload object 73643 tablespace 4 column NUMBER NUMBER VARCHAR2
?
?
Unloading Object,object ID: 73644, Cluster: 0
output data is in file : 'ODU_0000073644.txt'
block is not a iot index block
?
Sample result:
object id: 73644
tablespace no: 4
no data.
?
?
Unloading Object,object ID: 91884, Cluster: 0
output data is in file : 'ODU_0000091884.txt'
?
Sample result:
object id: 91884
tablespace no: 4
sampled 4 rows
column count: 3
column 1 type: NUMBER
column 2 type: VARCHAR2
column 3 type: VARCHAR2
?
COMMAND:
unload object 91884 tablespace 4 column NUMBER VARCHAR2 VARCHAR2
?
?
Unloading Object,object ID: 91885, Cluster: 0
output data is in file : 'ODU_0000091885.txt'
block is not a iot index block
?
Sample result:
object id: 91885
tablespace no: 4
no data.
?
?
Unloading Object,object ID: 91890, Cluster: 0
output data is in file : 'ODU_0000091890.txt'
?
Sample result:
object id: 91890
tablespace no: 4
sampled 14 rows
column count: 8
column 1 type: NUMBER
column 2 type: VARCHAR2
column 3 type: VARCHAR2
column 4 type: NUMBER
column 5 type: DATE
column 6 type: NUMBER
column 7 type: NUMBER
column 8 type: NUMBER
?
COMMAND:
unload object 91890 tablespace 4 column NUMBER VARCHAR2 VARCHAR2 NUMBER DATE NUMBER NUMBER NUMBER
?
?
Unloading Object,object ID: 91893, Cluster: 0
output data is in file : 'ODU_0000091893.txt'
block is not a iot index block
?
Sample result:
object id: 91893
tablespace no: 4
no data.
?
?
Unloading Object,object ID: 91907, Cluster: 0
output data is in file : 'ODU_0000091907.txt'
?
Sample result:
object id: 91907
tablespace no: 4
sampled 5 rows
column count: 3
column 1 type: NUMBER
column 2 type: NUMBER
column 3 type: NUMBER
?
COMMAND:
unload object 91907 tablespace 4 column NUMBER NUMBER NUMBER
?
?
Unloading Object,object ID: 92007, Cluster: 0
output data is in file : 'ODU_0000092007.txt'
?
Sample result:
object id: 92007
tablespace no: 4
sampled 1058 rows
column count: 18
column 1 type: VARCHAR2
column 2 type: VARCHAR2
column 3 type: RAW
column 4 type: NUMBER
column 5 type: NUMBER
column 6 type: VARCHAR2
column 7 type: DATE
column 8 type: DATE
column 9 type: VARCHAR2
column 10 type: VARCHAR2
column 11 type: VARCHAR2
column 12 type: VARCHAR2
column 13 type: VARCHAR2
column 14 type: NUMBER
column 15 type: RAW
column 16 type: VARCHAR2
column 17 type: VARCHAR2
column 18 type: VARCHAR2
?
COMMAND:
unload object 92007 tablespace 4 column VARCHAR2 VARCHAR2 RAW NUMBER NUMBER VARCHAR2 DATE DATE VARCHAR2 VARCHAR2 VARCHAR2 VARCHAR2 VARCHAR2 NUMBER RAW VARCHAR2 VARCHAR2 VARCHAR2
?
?
Unloading Object,object ID: 92035, Cluster: 0
output data is in file : 'ODU_0000092035.txt'
?
Sample result:
object id: 92035
tablespace no: 4
sampled 1127 rows
column count: 18
column 1 type: VARCHAR2
column 2 type: VARCHAR2
column 3 type: VARCHAR2
column 4 type: NUMBER
column 5 type: NUMBER
column 6 type: VARCHAR2
column 7 type: DATE
column 8 type: DATE
column 9 type: VARCHAR2
column 10 type: VARCHAR2
column 11 type: VARCHAR2
column 12 type: VARCHAR2
column 13 type: VARCHAR2
column 14 type: NUMBER
column 15 type: RAW
column 16 type: VARCHAR2
column 17 type: VARCHAR2
column 18 type: VARCHAR2
?
COMMAND:
unload object 92035 tablespace 4 column VARCHAR2 VARCHAR2 VARCHAR2 NUMBER NUMBER VARCHAR2 DATE DATE VARCHAR2 VARCHAR2 VARCHAR2 VARCHAR2 VARCHAR2 NUMBER RAW VARCHAR2 VARCHAR2 VARCHAR2
?
?
Unloading Object,object ID: 92064, Cluster: 0
output data is in file : 'ODU_0000092064.txt'
?
Sample result:
object id: 92064
tablespace no: 4
sampled 4 rows
column count: 6
column 1 type: NUMBER
column 2 type: VARCHAR2
column 3 type: VARCHAR2
column 4 type: NUMBER
column 5 type: RAW
column 6 type: VARCHAR2
?
COMMAND:
unload object 92064 tablespace 4 column NUMBER VARCHAR2 VARCHAR2 NUMBER RAW VARCHAR2
?
ODU> unload object 92064 tablespace 4 column NUMBER VARCHAR2 VARCHAR2 NUMBER RAW VARCHAR2
?
Unloading Object,object ID: 92064, Cluster: 0 at 2014-05-26 21:39:47
4 rows unloaded
At 2014-05-26 21:39:47
?
ODU>
?
[oracle@localhost data]$ cat ODU_0000092064.txt
100|travel1|beijing|100|01|1
101|travel2|beijing2|100|01|1
102|travel3|beijing2|100
103|travel4|beijing2|100
?
[oracle@localhost data]$ cat ODU_0000092064.sql
CREATE TABLE "ODU_0000092064"
(
"C0001" NUMBER ,
"C0002" VARCHAR2(4000) ,
"C0003" VARCHAR2(4000) ,
"C0004" NUMBER ,
"C0005" RAW(2000) ,
"C0006" VARCHAR2(4000)
);
在没有数据字典的情况下把字段全部识别，不光是这个功能包含以前的存在隐藏列的都在恢复都需要注意
关闭ROW ARCHIVAL;
SQL> ALTER TABLE travel.row_arch NO ROW ARCHIVAL;
?
TABLE altered.
?
SQL> SELECT * FROM travel.row_arch;
?
ID NAME ADDR PHONE
---------- --------------- ------------------------------------------------------------ ----------
100 travel1 beijing 100
101 travel2 beijing2 100
102 travel3 beijing2 100
103 travel4 beijing2 100
?
?
SQL> ALTER system dump datafile 6 block 221;
?
System altered.
?
SQL> @show_trace
?
TRACE_FILE_NAME
-------------------------------------------------------------------------------------
/u01/app/oracle/diag/rdbms/noncdb/noncdb/trace/noncdb_ora_4078.trc
?
?
?
Block header dump: 0x018000dd
Object id ON Block? Y
seg/obj: 0x167a0 csc: 0x00.1ce60f itc: 2 flg: E typ: 1 - DATA
brn: 0 bdba: 0x18000d8 ver: 0x01 opc: 0
inc: 0 exflg: 0
?
Itl Xid Uba Flag Lck Scn/Fsc
0x01 0x0006.008.00000671 0x010037ca.00c7.2c C--- 0 scn 0x0000.001ce0b1
0x02 0x0005.001.00000629 0x01003f2a.00e9.24 --U- 2 fsc 0x0000.001ce610
bdba: 0x018000dd
data_block_dump,DATA header at 0x7f2cb3265064
===============
tsiz: 0x1f98
hsiz: 0x1a
pbl: 0x7f2cb3265064
76543210
flag=--------
ntab=1
nrow=4
frre=-1
fsbo=0x1a
fseo=0x1ef2
avsp=0x1f0c
tosp=0x1f0c
0xe:pti[0] nrow=4 offs=0
0x12:pri[0] offs=0x1f11
0x14:pri[1] offs=0x1ef2
0x16:pri[2] offs=0x1f49
0x18:pri[3] offs=0x1f2e
block_row_dump:
tab 0, ROW 0, @0x1f11
tl: 29 fb: --H-FL-- lb: 0x2 cc: 6
col 0: [ 2] c2 02
col 1: [ 7] 74 72 61 76 65 6c 31
col 2: [ 7] 62 65 69 6a 69 6e 67
col 3: [ 2] c2 02
tab 0, ROW 1, @0x1ef2
tl: 31 fb: --H-FL-- lb: 0x2 cc: 6
col 0: [ 3] c2 02 02
col 1: [ 7] 74 72 61 76 65 6c 32
col 2: [ 8] 62 65 69 6a 69 6e 67 32
col 3: [ 2] c2 02
tab 0, ROW 2, @0x1f49
tl: 27 fb: --H-FL-- lb: 0x0 cc: 4
col 0: [ 3] c2 02 03
col 1: [ 7] 74 72 61 76 65 6c 33
col 2: [ 8] 62 65 69 6a 69 6e 67 32
col 3: [ 2] c2 02
tab 0, ROW 3, @0x1f2e
tl: 27 fb: --H-FL-- lb: 0x0 cc: 4
col 0: [ 3] c2 02 04
col 1: [ 7] 74 72 61 76 65 6c 34
col 2: [ 8] 62 65 69 6a 69 6e 67 32
col 3: [ 2] c2 02
end_of_block_dump
END dump DATA blocks tsn: 4 file#: 6 minblk 221 maxblk 221
[oracle@localhost odu]$
SQL> SELECT * FROM col$ WHERE obj#='92064';
?
OBJ# COL# SEGCOL# SEGCOLLENGTH OFFSET NAME TYPE# LENGTH FIXEDSTORAGE PRECISION# SCALE NULL$ DEFLENGTH DEFAULT$ INTCOL# PROPERTY CHARSETID CHARSETFORM EVALEDITION# UNUSABLEBEFORE# UNUSABLEBEGINNING# SPARE1 SPARE2 SPARE3 S S S SPARE7 SPARE8
---------- ---------- ---------- ------------ ---------- --------------- ---------- ---------- ------------ ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ----------- ------------ --------------- ------------------ ---------- ---------- ---------- - - - ---------- ----------
92064 1 1 22 0 ID 2 22 0 0 1 0 0 0 0 0 0 0
92064 2 2 30 0 NAME 1 30 0 0 2 0 873 1 0 0 0 30
92064 3 3 30 0 ADDR 1 30 0 0 3 0 873 1 0 0 0 30
92064 4 4 22 0 PHONE 2 22 0 0 4 0 0 0 0 0 0 0
?
SQL> SELECT OWNER,TABLE_NAME,COLUMN_NAME,COLUMN_ID FROM DBA_TAB_COLS WHERE TABLE_NAME='ROW_ARCH';
?
OWNER TABLE_NAME COLUMN_NAME COLUMN_ID
---------- ---------- --------------- ---------
TRAVEL ROW_ARCH PHONE 4
TRAVEL ROW_ARCH ADDR 3
TRAVEL ROW_ARCH NAME 2
TRAVEL ROW_ARCH ID 1
col$表的结构
create table col$ /* column table */
( obj# number not null, /* object number of base object */
col# number not null, /* column number as created */
segcol# number not null, /* column number in segment */
segcollength number not null, /* length of the segment column */
offset number not null, /* offset of column */
name varchar2("M_IDEN") not null, /* name of column */
type# number not null, /* data type of column */
/* for ADT column, type# = DTYADT */
length number not null, /* length of column in bytes */
fixedstorage number not null, /* flags: 0x01 = fixed, 0x02 = read-only */
precision# number, /* precision */
scale number, /* scale */
null$ number not null, /* 0 = NULLs permitted, */
/* > 0 = no NULLs permitted */
deflength number, /* default value expression text length */
default$ long, /* default value expression text */
?
/*
* If a table T(c1, addr, c2) contains an ADT column addr which is stored
* exploded, the table will be internally stored as
* T(c1, addr, C0003$, C0004$, C0005$, c2)
* Of these, only c1, addr and c2 are user visible columns. Thus, the
* user visible column numbers for (c1, addr, C0003$, C0004$, C0005$, c2)
* will be 1,2,0,0,0,3. And the corresponding internal column numbers will
* be 1,2,3,4,5,6.
*
* Some dictionary tables like icol$, ccol$ need to contain intcol# so
* that we can have indexes and constraints on ADT attributes. Also, these
* tables also need to contain col# to maintain backward compatibility.
* Most of these tables will need to be accessed by col#, intcol# so
* indexes are created on them based on (obj#, col#) and (obj#, intcol#).
* Indexes based on col# have to be non-unique if ADT attributes might
* appear in the table. Indexes based on intcol# can be unique.
*/
intcol# number not null, /* internal column number */
property number not null, /* column properties (bit flags): */
/* 0x0001 = 1 = ADT attribute column */
/* 0x0002 = 2 = OID column */
/* 0x0004 = 4 = nested table column */
/* 0x0008 = 8 = virtual column */
/* 0x0010 = 16 = nested table's SETID$ column */
/* 0x0020 = 32 = hidden column */
/* 0x0040 = 64 = primary-key based OID column */
/* 0x0080 = 128 = column is stored in a lob */
/* 0x0100 = 256 = system-generated column */
/* 0x0200 = 512 = rowinfo column of typed table/view */
/* 0x0400 = 1024 = nested table columns setid */
/* 0x0800 = 2048 = column not insertable */
/* 0x1000 = 4096 = column not updatable */
/* 0x2000 = 8192 = column not deletable */
/* 0x4000 = 16384 = dropped column */
/* 0x8000 = 32768 = unused column - data still in row */
/* 0x00010000 = 65536 = virtual column */
/* 0x00020000 = 131072 = place DESCEND operator on top */
/* 0x00040000 = 262144 = virtual column is NLS dependent */
/* 0x00080000 = 524288 = ref column (present as oid col) */
/* 0x00100000 = 1048576 = hidden snapshot base table column */
/* 0x00200000 = 2097152 = attribute column of a user-defined ref */
/* 0x00400000 = 4194304 = export hidden column,RLS on hidden col */
/* 0x00800000 = 8388608 = string column measured in characters */
/* 0x01000000 = 16777216 = virtual column expression specified */
/* 0x02000000 = 33554432 = typeid column */
/* 0x04000000 = 67108864 = Column is encrypted */
/* 0x20000000 = 536870912 = Column is encrypted without salt */
?
/* 0x000800000000 = 34359738368 = default with sequence */
/* 0x001000000000 = 68719476736 = default on null */
/* 0x002000000000 = 137438953472 = generated always identity column */
/* 0x004000000000 = 274877906944 = generated by default identity col */
/* 0x080000000000 = 8796093022208 = Column is sensitive */
?
/* The spares may be used as the column's NLS character set,
* the number of distinct column values, and the column's domain.
*/
/* the universal character set id maintained by NLS group */
charsetid number, /* NLS character set id */
/*
* charsetform
*/
charsetform number,
/* 1 = implicit: for CHAR, VARCHAR2, CLOB w/o a specified set */
/* 2 = nchar: for NCHAR, NCHAR VARYING, NCLOB */
/* 3 = explicit: for CHAR, etc. with "CHARACTER SET ..." clause */
/* 4 = flexible: for PL/SQL "flexible" parameters */
evaledition# number, /* evaluation edition */
unusablebefore# number, /* unusable before edition */
unusablebeginning# number, /* unusable beginning with edition */
spare1 number, /* fractional seconds precision */
spare2 number, /* interval leading field precision */
spare3 number, /* maximum number of characters in string */
spare4 varchar2(1000), /* NLS settings for this expression */
spare5 varchar2(1000),
spare6 date,
spare7 number,
spare8 number
)
cluster c_obj#(obj#)
/
原文地址：oracle12c_Row-archival, 感谢原作者分享。
성명
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