NULL geometries generated from ST_FORCE3D(geom,NULL)

[ponceta]

It is not a recent bug but actually the result of

ST_FORCE3D(geom,NULL) is NULL

On the user side it seems like a bug since is should be equivalent as not providing the altitude value to the ST_FORCE3D function :

ST_FORCE3D(geom) is the 3D geom with 0 as altitude which is the result of ST_FORCE3D(geom,0)

Can we agree that it is a bug?

[ponceta]

To reproduce quickly on postgis side, try :

    'SELECT ST_ASTEXT(ST_FORCE3D(ST_GeomFromText('POINT(2540642.81 1151868.287)',2056)))'

    'SELECT ST_ASTEXT(ST_FORCE3D(ST_GeomFromText('POINT(2540642.81 1151868.287)',2056),0))'

    'SELECT ST_ASTEXT(ST_FORCE3D(ST_GeomFromText('POINT(2540642.81 1151868.287)',2056),NULL))'

[pramsey]

I can agree it's a bug, and almost certainly a result of leaning too hard on STRICT mode in the function definition.