Hi Frank, Great, and I guess that this syntax example about how to select the dialect will be added to the driver manual page http://www.gdal.org/ogr/drv_vrt.html in your documentation sprint of FOSS4G NA.
-Jukka- ________________________________ Frank Warmerdam wrote: Jukka, It turns out you can already assign a dialect. I think it is roughly like: <SrcSQL dialect="sqlite">SELECT ...</SrcSQL> It seems to be touched on it the docs for the OGR VRT driver as well. Best regards, Frank On Fri, May 24, 2013 at 9:46 AM, Frank Warmerdam <warmer...@pobox.com<mailto:warmer...@pobox.com>> wrote: Jukka, Agreed! The SrcSQL directive in the VRT should accept a dialect option. I'll try to do that this afternoon as we are "sprinting" here at FOSS4G NA and this would be a nice sized feature to add. Best regards, Frank On Fri, May 24, 2013 at 8:39 AM, Jukka Rahkonen <jukka.rahko...@mmmtike.fi<mailto:jukka.rahko...@mmmtike.fi>> wrote: Hi, This works with ogrinfo ogrinfo -ro cities.shp -dialect SQLITE -sql "select GEOMETRY from cities" I tried to make a VRT file which would do the same <OGRVRTDataSource> <OGRVRTLayer name="cities"> <SrcDataSource>cities.shp</SrcDataSource> <LayerSRS>WGS84</LayerSRS> <SrcSQL>SELECT GEOMETRY from cities</SrcSQL> </OGRVRTLayer> </OGRVRTDataSource> Now ogrinfo does not find geometries ogrinfo cities.vrt INFO: Open of `cities.vrt' using driver `VRT' successful. 1: citiesERROR 1: SQL Expression Parsing Error: syntax error ERROR 1: SQL statement failed, or returned no layer result: "SELECT GEOMETRY from cities" This exact use case is not at all interesting but there would be quite nice possibilities if Spatialite SQL queries could be fired from the VRT and all this would be supported for on-the-fly conversions http://www.gaia-gis.it/gaia-sins/spatialite-sql-4.0.0.html -Jukka Rahkonen- _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org<mailto:gdal-dev@lists.osgeo.org> http://lists.osgeo.org/mailman/listinfo/gdal-dev -- ---------------------------------------+-------------------------------------- I set the clouds in motion - turn up | Frank Warmerdam, warmer...@pobox.com<mailto:warmer...@pobox.com> light and sound - activate the windows | http://pobox.com/~warmerdam and watch the world go round - Rush | Geospatial Software Developer -- ---------------------------------------+-------------------------------------- I set the clouds in motion - turn up | Frank Warmerdam, warmer...@pobox.com<mailto:warmer...@pobox.com> light and sound - activate the windows | http://pobox.com/~warmerdam and watch the world go round - Rush | Geospatial Software Developer _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
