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IDS Forum

Re: Salvage inform on who drop a table from logica

Posted By: Madison Pruet
Date: Monday, 11 April 2016, at 11:49 p.m.

In Response To: Salvage inform on who drop a table from logical lo (LEY PATRICK)

Of course, I could execute the following. The begin work/commit work log record is always displayed...

onlog -l -n 7 -t 0x1001c0
662018 52 BEGIN 15 7 0 04/11/2016 22:29:45 38 mpruet

34000000 07000100 00000000 00000000 4....... ........

00000000 00000000 0f000000 00000000 ........ ........

952d0700 00000000 a96b0c57 f4010000 .-...... .k.W....

26000000 &...
66204c 188 HDELETE 15 0 662018 1001c0 a0c 122

bc000000 00002900 12010000 00000000 ......). ........

00000000 00000000 0f000000 18206600 ........ ..... f.

932d0700 c0011000 c0011000 0c0a0000 .-...... ........

7a000000 00000000 00000000 80000064 z....... .......d

04746162 316d7072 75657420 20202020 .tab1mpr uet

20202020 20202020 20202020 20202020

20202020 20001002 01000000 64000800 ... ....d...

02000000 00000000 00000000 00a5e600 ........ ........

64000154 50000000 00000000 00000000 d..TP... ........

10000000 10000001 00010000 00000000 ........ ........

00000000 00080000 00000000 00000000 ........ ........

00000000 00000080 00410000 ........ .A..

addr len type xid id link
662108 100 DELITEM 15 0 66204c 1001c0 1001c0 a0c 7 1 37

64000000 00001d00 10000000 00000000 d....... ........

00000000 00000000 0f000000 4c206600 ........ ....L f.

992d0700 c0011000 c0011000 c0011000 .-...... ........

0c0a0000 07000000 01002500 04746162 ........ ..%..tab

316d7072 75657420 20202020 20202020 1mpruet

20202020 20202020 20202020 20202020

2075626c ubl
66216c 64 DELITEM 15 0 662108 1001c0 1001c0 a0c 2 2 4

40000000 00001d00 10000000 00000000 @....... ........

00000000 00000000 0f000000 08216600 ........ .....!f.

9b2d0700 c0011000 c0011000 c0011000 .-...... ........

0c0a0000 02000000 02000400 80000064 ........ .......d
662518 48 BEGCOM 15 0 6624ec

30000000 00000400 10000000 00000000 0....... ........

00000000 00000000 0f000000 ec246600 ........ .....$f.

af2d0700 00000000 a96b0c57 c3011000 .-...... .k.W....
663044 48 COMMIT 15 0 663018 04/11/2016 22:29:45

30000000 00000200 10000000 00000000 0....... ........

00000000 00000000 0f000000 18306600 ........ .....0f.

b72d0700 00000000 a96b0c57 a96b0c57 .-...... .k.W.k.W

Madison Pruet
Retired and Loving it

On Monday, April 11, 2016 10:37 PM, Madison Pruet <madison_pruet@yahoo.com> wrote:

I created a database and a table. The table name is put into systables and contains the name of the table.

create database cmpdb with log;
create table tab1 (col1 int, col2 int);

select * from systables where tabname = "tab1";
tabname tab1
owner mpruet
partnum 1049089
tabid 100
rowsize 8
ncols 2
nindexes 0
nrows 0.00
created 04/11/2016
version 6553601
tabtype T
locklevel P
npused 0.00
fextsize 16
nextsize 16

Now I need the partnum for systables....

select * from systables where tabname = "systables";
tabname systables
owner informix
partnum 1049024 (hex 0x1001c0)
tabid 1
rowsize 500
ncols 26
nindexes 2
nrows 65.00000000000

Now all I need to to is to track the changes made to systables after the table has been dropped since dropping the table would have updated systables...

drop table tab1;

Now executing onlog ....
44695890 5 U-B---- 5 1:30043 5000 5000 100.00
446958d8 6 U-B---- 6 1:35043 5000 1837 36.74
44695920 7 U---C-L 7 1:40043 5000 1636 32.72
44695968 8 A------ 0 1:45043 5000 0 0.00
446959b0 9 A------ 0 1:50043 5000 0 0.00

onlog -l -n 7 > /tmp/t1

Using an editor, we find the insert into systables (when the table was created)...

addr len type xid id link
65f3d0 188 HINSERT 15 0 65f390 1001c0 a0c 122

bc000000 00002800 12010000 00000000 ......(. ........

00000000 00000000 0f000000 90f36500 ........ ......e.

5e2d0700 c0011000 c0011000 0c0a0000 ^-...... ........

7a000004 00000000 00000000 80000000 z....... ........

04746162 316d7072 75657420 20202020 .tab1mpr uet

20202020 20202020 20202020 20202020

20202020 20001002 01000000 64000800 ... ....d...

02000000 00000000 00000000 00a5e600 ........ ........

64000154 50000000 00000000 00000000 d..TP... ........

10000000 10000001 00010000 00000000 ........ ........

00000000 00080000 00000000 00000000 ........ ........

00000000 00000080 00412b00 ........ .A+.

And then look for the HDELETE....

662018 52 BEGIN 15 7 0 04/11/2016 22:29:45 38 mpruet

34000000 07000100 00000000 00000000 4....... ........

00000000 00000000 0f000000 00000000 ........ ........

952d0700 00000000 a96b0c57 f4010000 .-...... .k.W....

26000000 &...
66204c 188 HDELETE 15 0 662018 1001c0 a0c 122

bc000000 00002900 12010000 00000000 ......). ........

00000000 00000000 0f000000 18206600 ........ ..... f.

932d0700 c0011000 c0011000 0c0a0000 .-...... ........

7a000000 00000000 00000000 80000064 z....... .......d

04746162 316d7072 75657420 20202020 .tab1mpr uet

20202020 20202020 20202020 20202020

20202020 20001002 01000000 64000800 ... ....d...

02000000 00000000 00000000 00a5e600 ........ ........

64000154 50000000 00000000 00000000 d..TP... ........

10000000 10000001 00010000 00000000 ........ ........

00000000 00080000 00000000 00000000 ........ ........

00000000 00000080 00410000 ........ .A..

We see the transaction index ID is 15 and the begin work log record (BEGIN) is immediately before the HDELETE log record from systables. (HDELETE is home row delete...) And that indicates that user mpruet issued the transaction which executed the "drop table tmp"...

Madison Pruet
Retired and Loving it

On Monday, April 11, 2016 7:44 PM, LEY PATRICK <patrickley@gmail.com> wrote:

PLATFORM : AIX
INFORMIX VERSION : 11.70FC7

Hi all, we have a database with unbuffered mode and recently we found that
there is a missing object.

We want to find out who drop that particular object, given the fact that there
is not much activities on the box and also all logical log is still available.

Trying onlog -lu <username>

where <username> are those that has the DBA/RESOURCE right.

Question(s) :
1) How to identified the header for DROP TABLE command from the logical log's
output ? I do see example like CKPOINT, HUPBEF, HDELETE, UNIQ8ID and etc.

2) the output of the logical log is on HEX format, any tools to convert it to
human readable format ?

Thanks

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