Date: Tue, 9 Mar 1999 20:30:57 +0100
From: Michael Meskes <meskes@postgresql.org>
To: hoelc <hoelc@pd.jaring.my>
Cc: PostgreSQL Interfaces <pgsql-interfaces@postgresql.org>
Subject: Re: [INTERFACES] the last row in a table
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	PostgreSQL Interfaces <pgsql-interfaces@postgresql.org>
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	<87emn1fwsq.fsf@tolikus.hq.aaanet.ru>
	<36E50F4A.CB527B78@pd.jaring.my>
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	from hoelc on Tue, Mar 09, 1999 at 08:08:43PM +0800

On Tue, Mar 09, 1999 at 08:08:43PM +0800, hoelc wrote:
> I am developing a database with PostgreSQL in Linux, and using ecpg to write the
> C program to communicate with the database.

Nice to hear that. :-)

> One of my application need to get the data from the last row in a table.

Now that statement is sort of a problem. In a relational model there is no
order of tuples in a relation. You can simulate this via a unique key of
course or maybe use the OID. Or do you mean the last tuple of a query?

> Is there any function or command that can tract which is the last row of data in
> a table?

Once you opened a cursor you can move it to the end of the query via the
move command. I never used this feature but I take it this is how it is
supposed to be. Afterwards you can fetch one record backward.

Michael

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