[GRASS-dev] Fwd: [QGIS Application - Bug report #19733] v.rast.stats is broken due to parsing error of double underscore in column names

[Markus Metz]

On Sat, Sep 1, 2018 at 7:58 AM Markus Neteler <neteler at osgeo.org> wrote:
>
> Hi devs,
>
> does anyone have an idea how to fix this issue in QGIS processing?

this is a GDAL error message also happening in GRASS directly:

[...]
> v.out.ogr --overwrite -s -e input=tmp15356101025715
output="/tmp/processing5113522d9c174e7bb445f24ef38c5f5a/135e78c4ae1d430da568b502506b4ab0"
format=ESRI_Shapefile output_layer=output
> [...]
> ERROR 6: Failed to add field named 's_third_quartile'
> ERROR 6: Failed to add field named 's_percentile_2'

the underscores are not the problem because exporting columns like 's_t_q'
and 's_p_2' works. The field names are too long for dbf (max 10
characters). The solution would be to allow that "the field may be created
in a slightly different form depending on the limitations of the format
driver" [0] in v.out.ogr. The ERROR 6 would then change to e.g.

Warning 6: Normalized/laundered field name: 's_third_quartile' to
's_third_qu'

Markus M

[0] https://gdal.org/ogr__api_8h.html#aab585ef1166c61c4819f7fd46ee4a275
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