[mapserver-users] Inconsistency between 5.4 and 5.2.1 concerningWhichShapes()?

[Jim Strevinas]

Steve, you are absolutely right, according to #2689 i tried commenting
out the msLayerWhichItems (layer.i) prior to msLayerWhichShapes in
the 5.4 release. The item setup is thus maintained. 
While i'm afraid to mess with maplayer.c and maybe this will sound silly
,i observed that within maplayer.c in function msLayerWhichItems()
at line 402, a cleanup of the previous item selections is performed:

msLayerFreeItemInfo(layer);
if(layer->items) {
    msFreeCharArray(layer->items, layer->numitems);
    layer->items = NULL;
    layer->numitems = 0;
}

I commented out the whole cleanup and observed that in the whole code
below whenever needed (eg if classify is true) the elements subject to a
cleanup are just safely overwritten. Moreover, commenting out the cleanup 
fixes the problem in my humble opinion. 


> >>> Steve.Lime at dnr.state.mn.us wrote:
> 
> What does your layer definition look like? Probably stems from the fix
> put in
> place for ticket #2689 (http://trac.osgeo.org/mapserver/ticket/2689).
> That fix
> may need more work as I imagine the msLayerWhichItems() is clobbering
> the
> item setup done when the layer is opened.
> 
> Hmmm, how to fix...
> 
> Steve
> 
> >>> Jim Strevinas <voas_acc at hotmail.com> 04/27/09 8:27 PM >>>
> 
> > Hello list, I recently migrated to 5.4. I observed the following
> > inconsistency 
> > and I would be grateful if someone can duplicate the problem too.
> > In my (mapscript python) code i manually grab layer features using:
> 
> > layer.open()
> > status = layer.whichShapes(map.extent)
> > while (1):
> >        shape = layer.nextShape()
>        > if shape==None: 
>                 > break
> >        print shape.numvalues
> 
> > The last print returns the number of non-spatial attributes. 
> >  In mapserver 5.2.1 it is returned correctly but in 5.4 is always 0
> > just like all the non spatial values are all null. 



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