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xpath_table

From: Thomas Kellerer <spam_eater(at)gmx(dot)net>
To: pgsql-sql(at)postgresql(dot)org
Subject: xpath_table
Date: 2008-05-15 11:37:34
Message-ID: g0h79v$buu$1@ger.gmane.org (view raw or flat)
Thread:
Lists: pgsql-sql
Hi, 

I am using xpath_table to convert elements from an XML column to "rows". 

Now according to 
http://www.postgresql.org/docs/8.3/static/xml2.html
this function will be removed in a future version. 

That chapter also claims that the new XML syntax covers the functionality of the xml2 module, but I cannot find a way to return the elements of an XML document as rows (as xpath_table does)

Suppose I have the following content in my xml column:

<team>
  <member id="10" name="Arthur Dent"/>
  <member id="11" name="Ford Prefect"/>
</team>


I am using a statement similar to this:

select member_id, member_name
from xpath_table('id', 'xml_text', 'xmltest', '/team/member/@id|/team/member/@name', 'true')
as t(id integer, member_id varchar, member_name varchar)

to get the following output

member_id	member_name
10	Arthur Dent
11	Ford Prefect

How would I achieve the same without using the deprecated xml2 module?

Thanks in advance
Thomas


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