Обсуждение: regarding oid(object id)

let me share this simple test case:
pg=# create table myt(a int)with oids;
CREATE TABLE
pg=# select * from myt;
 a
---
(0 rows)

pg=# insert into myt values(1);
INSERT 16387 1

pg=# select a, oid from myt;
 a |  oid 
---+-------
 1 | 16387
(1 row)

Please read this section:
http://www.postgresql.org/docs/9.0/static/sql-createtable.html
http://www.postgresql.org/docs/9.0/static/sql-createtable.html#SQL-CREATETABLE-STORAGE-PARAMETERS

--
Chetan Sutrave
Senior Software Engineer
EnterpriseDB Corporation
The Enterprise PostgreSQL Company
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On Mar 10, 2011, at 12:31 PM, siva kiran balijepalli wrote:

> Hi
> i am novice postgr sql user.
>
> I have created a table named customer in my data base.
> also i have inserter some of the rows into my table.
> when i try to execute this command to select object id's (oid) i am getting following error.
>
> select oid from customer;
> error: column oid doesn't exist

For old/Existing Table without OID, you can't get OID.

> note: even though i have changed the
> default_with_oids = on in postgreconf file,i am not getting the oid's.
>
Setting Above parameter will make sure that new tables will get created with OIDs.
i.e you don't have to mention WITH OID in CREATE TABLE Syntax.


Thanks & Regards,
Vibhor Kumar
EnterpriseDB Corporation
The Enterprise PostgreSQL Company
vibhor.kumar@enterprisedb.com
Blog:http://vibhork.blogspot.com