From: Christian Grün <christian.gruen@gmail.com>;
To: Anupam Bakshi <bakshia@yahoo.com>;
Cc: basex-talk@mailman.uni-konstanz.de <basex-talk@mailman.uni-konstanz.de>;
Subject: Re: [basex-talk] Nothing gets printed after insert node
Sent: Tue, Jun 5, 2012 2:09:10 PM

Hi Anupam,

updating queries will never return results. Please consult our
documentation if you are interested in the concepts of the XQuery
Update Facility [1].

Christian

[1] http://docs.basex.org/wiki/XQuery_Update#Concepts
___________________________

On Tue, Jun 5, 2012 at 3:49 PM, Anupam Bakshi <bakshia@yahoo.com> wrote:
> Hello,
> My XQuery file looks like this :
>
> for $metric in doc("C:\sample1.xml")//metric
> return (
>    delete node $metric,
>    insert node <NID>{string($metric)}</NID>
>        into $metric/..
> )
>
> The sample1.xml contains "metric" elements.
>
> Yet when I execute the query noting gets printed out.
>
> Following is the Query Info which shows 6 Updates. But where are the updates
> happening?
> I must be doing something wrong, but can't figure it out.
>
> Thanks for your help,
> Anupam
>
> Query: for $metric in doc("C:\sample1.xml")//metric return ( delete node
> $metric, insert node <MET>{string($metric)}</MET> into $metric/.. )
> Compiling:
> - pre-evaluating fn:doc("C:\sample1.xml")
> - optimizing descendant-or-self step(s)
> - converting descendant::*:metric to child steps
> Result: for $metric in document-node { "sample1.xml" }/*:plan/*:metric
> return (delete nodes $metric, insert node element { "MET" } {
> fn:string($metric) } into $metric/..)
> Timing:
> - Parsing: 0.84 ms
> - Compiling: 2.21 ms
> - Evaluating: 3.37 ms
> - Printing: 0.14 ms
> - Total Time: 6.57 ms
> Result:
> - Hit(s): 0 Items
> - Updated: 6 Items
> - Printed: 0 Bytes
> Query plan:
> <QueryPlan>
> <FLWR>
>     <For var="$metric">
>       <IterPath>
>         <DBNode name="ivst3_plan_3" pre="0"/>
>         <IterStep axis="child" test="*:plan"/>
>         <IterStep axis="child" test="*:metric"/>
>       </IterPath>
>     </For>
>     <Return>
>       <List>
>         <Delete>
>           <VarRef>
>             <Var name="$metric" id="0"/>
>           </VarRef>
>         </Delete>
>         <Insert>
>           <AxisPath>
>             <VarRef>
>               <Var name="$metric" id="0"/>
>             </VarRef>
>             <IterStep axis="parent" test="node()"/>
>           </AxisPath>
>           <CElem>
>             <QNm value="MET" type="xs:QName"/>
>             <FNAcc name="string([item])">
>               <VarRef>
>                 <Var name="$metric" id="0"/>
>               </VarRef>
>             </FNAcc>
>           </CElem>
>         </Insert>
>       </List>
>     </Return>
> </FLWR>
> </QueryPlan>
>
>
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