[gdal-dev] Ogrinfo does not open any more raster-only geopackage

[Even Rouault]

On vendredi 24 mars 2017 10:20:42 CET Rahkonen Jukka (MML) wrote:
> Hi,
> 
> Recent GDAL 2.2-dev versions can't open geopackage that contains only raster
> data. ogrinfo -ro -sql "PRAGMA journal_mode" raster.gpkg

Hi Jukka,

I could only reproduce with a .gpkg that didn't have a gpkg_geometry_columns table. Which 
is valid, but not what GDAL creates, so I guess this comes from another software ?

I've just pushed a commit with 3 changes :

- accept opening a .gpkg without vector content and without gpkg_geometry_columns table 
in vector mode if we also open in update mode.
==> So that means in your above case you must remove the -ro flag

- remove capability of opening a .gpkg without vector content but with 
gpkg_geometry_columns table in vector mode if we only open in read-only mode
==> this is for consistency with the above behaviour.
Summary is : if you open in vector mode something that has no vector, it doesn't make sense 
in read-only mode for most use cases (think to a vector-only capable software that would 
face a raster-only .gpkg). For advanced use cases, you need to specify the update mode (ie 
remove the -ro flag). Or if you exclude the GPKG driver completely with --config OGR_SKIP 
GPKG, the SQLite driver will be used as a fallback.

- fix creation of a vector layer in a database if it initially lacks a gpkg_geometry_columns table


The very small core of the geopackage specification makes it quite tricky to support all 
potential combinations of valid GeoPackage.


Even


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