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Date: Thu, 8 Jun 2006 18:09:33 -0500
From: "Jim C. Nasby" <jnasby@pervasive.com>
To: Philippe Lang <philippe.lang@attiksystem.ch>
Cc: pgsql-sql@postgresql.org
Subject: Re: pgxml & xpath_table
Message-ID: <20060608230932.GN45331@pervasive.com>
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There's a good chance the author isn't on this list. You'd be better off
on pgsql-general, or just emailing the author of pgxml directly.

On Thu, Jun 08, 2006 at 06:00:42PM +0200, Philippe Lang wrote:
> Hi,
> 
> I'm playing with the contrib/pgxml library under PG 8.1.4, and I'm not sure if what I found with pgxml is a feature of a bug:
> 
> I've got the following table:
> 
> --------------------
> CREATE TABLE test
> (
>   id int4 NOT NULL,
>   xml varchar(200),
>   CONSTRAINT pk PRIMARY KEY (id)
> ) 
> WITHOUT OIDS;
> 
> INSERT INTO test VALUES (1, '<doc num="C1"><line num="L1"><a>1</a><b>2</b><c>3</c></line><line num="L2"><a>11</a><b>22</b><c>33</c></line></doc>');
> 
> INSERT INTO test VALUES (2, '<doc num="C2"><line num="L1"><a>111</a><b>222</b><c>333</c></line><line num="L2"><a>111</a><b>222</b><c>333</c></line></doc>');
> --------------------
> 
> 
> If I launch this query:
> 
> --------------------
> select * from
> 
> xpath_table('id','xml','test', '/doc/@num|/doc/line/@num|/doc/line/a|/doc/line/b|/doc/line/c','1=1') AS t(id int4, doc_num varchar(10), line_num varchar(10), val1 int4, val2 int4, val3 int4)
> 
> where id = 1
> 
> order by doc_num, line_num
> --------------------
> 
> I get:
> 
> --------------------
> id    doc_num     line_num    val1    val2    val3
> 1     C1          L1          1       2       3
> 1                 L2          11      22      33
> --------------------
> 
> I was expecting doc_num would receive twice the C1 value, just like with a normal sql join.
> 
> Regards,
> 
> ----------------------------------
> Philippe Lang, Ing. Dipl. EPFL
> Attik System
> rte de la Fonderie 2
> 1700 Fribourg
> Switzerland
> http://www.attiksystem.ch
> 
> Tel:  +41 (26) 422 13 75
> Fax:  +41 (26) 422 13 76 



-- 
Jim C. Nasby, Sr. Engineering Consultant      jnasby@pervasive.com
Pervasive Software      http://pervasive.com    work: 512-231-6117
vcard: http://jim.nasby.net/pervasive.vcf       cell: 512-569-9461