[QGIS-Developer] Default QgsFeatureFid ?

[Greg Troxel]

Sandro Santilli <strk at kbt.io> writes:

> On Fri, Oct 15, 2021 at 08:12:07AM -0400, Greg Troxel wrote:
>
>> There's a larger question lurking behind that, which is something about
>> if tables in SQL can have NULL values and how that NULL is mapped into
>> qgis's main internal representation and then back out to various
>> formats.  (I know there's a great CJ Date rant about NULL not belonging
>> in SQL and how it is a symptom of denormalized data, but it is how it is
>> these days.)
>
> I don't think QGIS needs to support "null" values for feature id.
> Features *need* to have an not-null identifier.

Sounds perfectly reasonable, but in that case I would expect that it is
a non-optional argument to a constructor, and there should not be a way
to have a default value.

There might also be a non-duplicate integrity constraint.
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