Re: Working with XML. - Mailing list pgsql-sql

----- Original Message -----

From: Theo Galanakis

To: 'George Weaver'

Cc: 'pgsql-sql@postgresql.org'

Sent: Monday, February 14, 2005 9:46 PM

Subject: RE: [SQL] Working with XML.

Thanks George.

 

    How do you get an attributes value the following returns the attribute tag. i.e. rows="100", all i want is the 100.

   select
pgxml_xpath(
'<query columns="4" rows="100"><row><cola>284122</cola><colb>789648</colb><colc>{ts ''2005-02-14 16:13:18''}</colc><cold>unbnda8m5946z55sgi1xco34h1q9tLonoys3nyk1d5tgtLaw8h5wya0zdv7vigeiuk9xqLuacdy0dsisopb8g1o4o76090otmq65</cold></row><row><cola>243151</cola><colb>750292</colb><colc>{ts ''2005-02-14 16:13:18''}</colc><cold>2d4mat2Lptmdydtgqnc5vnuzxgqxiykqn1c4pr0oduk5gwz25b3Lq05dzqxetee9om45b69ytb48uvziL5xrvyu4k7ng4oouihx0</cold></row><row><cola>764929</cola><colb>641215</colb><colc>{ts ''2005-02-14 16:13:18''}</colc><cold>1z5x6dLc9n1vtcLbmk7q6hdriqLa2ub4et41podr7izcro4nkkLsvp9p0s7obzr27txvknn92m0ps4riqqx7puqoLn2wpmm2z50r</cold></row></query>'
,'//query/@rows','','')

Theo

 

-----Original Message-----
From: George Weaver [mailto:gweaver@shaw.ca]
Sent: Tuesday, 15 February 2005 12:39 AM
To: Theo Galanakis; pgsql-sql@postgresql.org
Subject: Re: [SQL] Working with XML.

Hi Theo,

 

I am not aware of any means of passing xml to stored procedures, apart from writing your own function to parse the xml.

 

In regard to your second question - how to access the second record - try using a more explicit xpath query incorporating a "where" component.  For example, if you wanted to access the second row based upon the value of cola, you could use '//query/row[@cola='525887']/text()'.  Or you could specify the position of the record if you know its position: '//query/row[2]/text()'.

 

Microsoft has a very good reference on xpath expressions: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/xmlsdk/html/xmrefxpathsyntax.asp.

 

Regards,

George

----- Original Message -----

From: Theo Galanakis

To: pgsql-sql@postgresql.org

Sent: Sunday, February 13, 2005 11:48 PM

Subject: [SQL] Working with XML.

Hi Folks,

Is there a way to pass in an xml string into a stored proc and thenplace this into a temp table?

I use to be able to do this in sql server, it was quite handy as I could call one stored proc to update multiple records, here is a sample in sql server:

select CoverTypeID, ItemSQ, SituationID, ItemDescription, CoverAmount
From  OpenXML ( @XmlHandle, '/cover/covertype/item',1 )
            With ( CoverTypeID int '../@id',
                      ItemSQ int '@id',
                      SituationID int '@situationID',
                      ItemDescription varchar(100) '@description',
                      CoverAmount money '@amount' )

I have managed to get get pgxml_xpath working, however Im not sure how to access specific rows in an xml document. E.g below there are two records, how do I access the second record, the following returns both ,'//query/row/cola values being (284122,525887):

select
pgxml_xpath(
'<query columns="4" rows="100"><row><cola>284122</cola><colb>789648</colb><colc>{ts ''2005-02-14 16:13:18''}</colc><cold>unbnda8m5946z55sgi1xco34h1q9tLonoys3nyk1d5tgtLaw8h5wya0zdv7vigeiuk9xqLuacdy0dsisopb8g1o4o76090otmq65</cold></row<row><cola>525887</cola><colb>493253</colb><colc>{ts ''2005-02-14 16:13:18''}</colc><cold>6uydk442uz247ga45kpys7htkxznkn8La31qhn942wu2cu2pdr25mv2nup2zh3vcbh3c4vdauak3p3w093cvtkeyga692b455cr3</cold></row></query>'

,'//query/row/cola/text()','','')

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