From: Oliver Elphick <olly@lfix.co.uk>
To: Sondaar Roelof <roelof.sondaar@scania.com>
Cc: pgsql-sql@postgresql.org
Subject: Re: COPY use in function with variable file name
Date: 02 Feb 2003 21:30:16 +0000
Message-ID: <1044221415.32731.507.camel@linda.lfix.co.uk> (raw)
In-Reply-To: <B659C5A6EF67D5119430006097487147329946@sv7007b.nl.scania.com>
References: <B659C5A6EF67D5119430006097487147329946@sv7007b.nl.scania.com>
On Wed, 2003-01-29 at 08:05, Sondaar Roelof wrote:
> Hello,
>
> I can't figure out how to make this work, or is not possible?
>
> In a function i would like to read a file.
> The file name is determined by a value from a table.
> However the COPY statement does not to accept this?
> I tried various forms of adding (single)-quotes but no luck.
>
> Anyone any ideas?
>
> Function:
> CREATE FUNCTION dnsdhcp_dns_raw()
> /* Fill table dns_raw with dns data */
> RETURNS integer AS '
> DECLARE
> r RECORD;
> ntw TEXT;
> BEGIN
> /* Do for all domain names */
> FOR r IN SELECT domain FROM network
> WHERE position(''n'' IN use) > 0 and ipaddress != ''127.0.0.0/24''
> LOOP
> ntw := ''/tmp/db.'' || r.domain;
> DELETE FROM dns_raw; /* Clear table */
> RAISE NOTICE ''Network: %'', ntw;
> COPY dns_raw FROM ntw DELIMITERS ''~''; /* Get the data */
Since ntw has variable content, you need to do an EXECUTE with the
command in a text string:
EXECUTE ''COPY dns_raw FROM '' || ntw || '' DELIMITERS ''''='''''';
(I hope that is the right number of quotes!)
> END LOOP;
> RETURN 0;
> END;'
> LANGUAGE 'plpgsql';
--
Oliver Elphick Oliver.Elphick@lfix.co.uk
Isle of Wight, UK http://www.lfix.co.uk/oliver
GPG: 1024D/3E1D0C1C: CA12 09E0 E8D5 8870 5839 932A 614D 4C34 3E1D 0C1C
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To: pgsql-sql@postgresql.org
Cc: olly@lfix.co.uk, roelof.sondaar@scania.com
Subject: Re: COPY use in function with variable file name
In-Reply-To: <1044221415.32731.507.camel@linda.lfix.co.uk>
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