Re: How do I select nth row from a table

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: ganesanm <ganesanm(at)technauts(dot)com>
Cc: pgsql-interfaces(at)postgresql(dot)org, Michael Meskes <meskes(at)postgresql(dot)org>
Subject: Re: How do I select nth row from a table
Date: 2000-04-20 03:14:13
Message-ID: 402.956200453@sss.pgh.pa.us
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ganesanm <ganesanm(at)technauts(dot)com> writes:
> How can I incorporate this query in an embedded sql ??

> I tried the following but ecpg returned error on the last
> line.

> exec sql
> select mfl_size into :mfl_size
> from mail_file_dtl
> where mfl_recipient = :mfl_recipient
> order by mfl_file_name limit 1 offset = :nNumber ;

> Can a variable name be used in the offset option to pass
> the value ?

It looks like not, at the moment. I think the grammar for ecpg
needs to accept a "cvariable" in places where the underlying
backend grammar only accepts an ICONST. It's probably too late
to fix this for 7.0, but it should be a todo item for 7.1...

regards, tom lane

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