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This commit sets the framework for allowing expression functions to use named parameters. Ie, instead of: clamp(1,2,3) you can use: clamp( min:=1, value:=2, max:=3) This also allows arguments to be switched, eg: clamp( value:=2, max:=3, min:=1) Additionally, it allows for a more structured definition of function parameters to handle optional arguments and default values for parameters. These are currently being done using a hacky infinite argument list. I've utilised the postgres ':=' syntax for specifying named arguments to avoid potential collisions which may arise with the equality test if we re-used just the '=' operator alone. Sponsored by North Road
Updating the srs.db ------------------- The srs.db can be updated from the EPSG codes in the GDAL installation: 1) Install latest GDAL, be sure to configure with --with-python. 2) Set PATH and PYTHONDIR if installed GDAL in non-standard location. 3) Run 'scripts/qgis_srs.sh > new_srs.sql'. It may take a minute or two. 4) Run 'sqlite3 new_srs.db < new_srs.sql'.' 4) Run 'sqlite3 new_srs.db <postprocess_srs.sql' You can use sqlite3 to dump the contents from both srs.db and new_srs.db before you decide to commit. Magnus Homann 2009-08-19