[Qgis-developer] Query Set using SetSubstring does not return record

[maaza mekuria]

I figured it out. I was assuming that the setSubsetString would do the querying and update the selection set, but I gather now after a few hours of hardwork that is not its purpose, it just limits the accessible features with out changing the selection set. 

How can I help update the documentation to reflect what the methods are meant to do?

Thank you,

Maaza  

--- On Wed, 6/8/11, maaza mekuria <sailmcm at yahoo.com> wrote:

> From: maaza mekuria <sailmcm at yahoo.com>
> Subject: [Qgis-developer] Query Set using SetSubstring does not return record
> To: "QGIS Developer" <qgis-developer at lists.osgeo.org>
> Date: Wednesday, June 8, 2011, 2:25 PM
>        
> 
>             
> I have a subsetstring query applied in code to the layer
> data. Yet I find that it does not return any records that it
> should have
>  located.
> 
> 
> The code is pasted below, the setSubsetString passes and
> yet the selected feature count is 0. What am I missing
> here?
> 
>                //Query the edge table edge field
> to find the two vertices 
>                strQryEdge = "EDGEID=" +
> fld0.toString() + ""; 
>                if
> (inEdgeVectorProvider->supportsSubsetString()) 
>                {
>                 
>  blnQryCur=inEdgeVectorLayer->setSubsetString(strQryEdge);
>                   if (blnQryCur) 
>                   {
>  
>                      lstEdgeFeats =
> inEdgeVectorLayer->selectedFeatures();
>                      txtStream << "
> Recount - "<<lstEdgeFeats.count()<<endl;
>                   } // if network source query
> returns edge result
>                } // if edge provider supports
> query subst
> 
> 
> Thank you,
> 
> Maaza
> 
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