Postgresql revert back database value

Question

I have postgresql database. My table name is tblvoippolicy. Now, problem is by mistake i have deleted some records from table. When I get the data file using following commands.

select * from pg_class where relname = 'tblvoippolicy' ; I get the following result

    relname    | relnamespace | reltype | relowner | relam | relfilenode | reltablespace | relpages | reltuples | reltoastrelid | reltoastidxid | relhasindex | relisshared | relkind | relnatts | relchecks | reltriggers | relukeys | relfkeys | relrefs | relhasoids | relhaspkey | relhasrules | relhassubclass | relacl 
---------------+--------------+---------+----------+-------+-------------+---------------+----------+-----------+---------------+---------------+-------------+-------------+---------+----------+-----------+-------------+----------+----------+---------+------------+------------+-------------+----------------+--------
 tblvoippolicy |        17234 |  407227 |      100 |     0 |      407226 |             0 |        0 |         0 |             0 |             0 | t           | f           | r       |        8 |         0 |           0 |        0 |        0 |       0 | t          | t          | f           | f              | 

Now, when I look that data into data file of database using cat /var/pgsql/data/base/17230/407226. I get following result.

[root@manage upload]# cat /var/pgsql/data/base/17230/407226
ôu\"(Ô  Ÿà Ÿà¨žð8žàÔÈM ï¡test EC250
@%
ÿ10.106.1.228Q   ï–BEC200_Post_250      EC200
ú%
ú10.106.1.228?   ï”BBS_Service_Pre_250bs_service_1
@&
ú10.106.1.2286   ï’BEC200_Pre_500       EC200
@&
ô10.106.1.228+   ïBEC200_Pre_250       EC200
@&

I can not understand the described values and I want to revert back the records which I have deleted from table, how can I get back that records ?

Answer 1

See if this helps. I would take a backup right away because if vacuum cleans out the deleted row it's gone and you won't have any chance to recover it.

Recover Deleted Row