Re: How do I select nth row from a table

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От Tom Lane
Тема Re: How do I select nth row from a table
Дата
Msg-id 402.956200453@sss.pgh.pa.us
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Ответ на How do I select nth row from a table  (ganesanm <ganesanm@technauts.com>)
Ответы Re: How do I select nth row from a table  (Michael Meskes <meskes@postgresql.org>)
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ganesanm <ganesanm@technauts.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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