[Gdal-dev] OGR: VRT

[Stephan Holl]

Hello Frank,

Am Montag, 20. November 2006 08:05 schrieb Frank Warmerdam:
> Stephan Holl wrote:
> > I have done this (with gdal-CVS from 17.11.2006). There are several
> > results which I try to summarize now:
> > The described problem above is away now, but another problem appears
> > which I stumbled over in gdal 1.3.2 as well. Therefor I decided to use
> > gdal 1.2.6 which works as expected in my app.
> >
> > When using the latest CVS with my join example I received this error:
> > ogrinfo -al join_together.ovf
> > ERROR 4: Update access not supported for VRT datasources.
> > Had to open data source read-only.
> > INFO: Open of `join_together.ovf'
> >       using driver `VRT' successful.
> >
> > Layer name: join
> > Geometry: Polygon
> > Feature Count: 16
> > ERROR 1: Not enough tokens to complete expression.
> > Segmentation fault
> >
> > This was know to work with 1.2.6 except the rounding problem.
>
> Stephan,
>
> I have confirmed and fixed a serious double free in
> OGRVRTLayer::SetAttributeFilter().   It only bites in
> cases where one non-NULL attribute filter is being applied
> in place of another - so relatively rare.

I have patched ogr/ogrsf_frmts/vrt/ogrvrtlayer.cpp with your changes and 
recompiled, the result is fine!

> I found I had to change the 'bld' to 'sta' in the following
> part of join_together.ovf, but I assume that was a typo on your
> part.

Yes, thank you, typo.

>
>        <SrcSQL>select  n2n_wert, n2n_idflm, n2n_wertdat, frmt_wert,
> format_wert from bld join 'join.ovf'.values
>          on AGS = n2n_idflaeche
>                  where AGS like '%'
>        </SrcSQL>
>
> If you can give tomorrows cvs snapshot a run sometime and verify the
> fix I'd appreciate it.

Working here again.

Best regards and thank you for the quick fix!!

	Stephan

-- 
Stephan Holl   : www.intevation.de/~stephan | GISpatcher: www.gispatcher.de
Intevation GmbH: www.intevation.de          | GAV e.V.: www.grass-verein.de
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