Hi Matthias,
Ok - this is the case here. ili2pg creates bigint pkeys. That explains
why I see the "unrelated" internal pkeys from QGIS instead.
It would be really nice if we had an option to create normal "integer"
pkeys with ili2pg instead of bigint. Other GIS (like Geomedia) had
issues with bigint pkeys as well (at least in older versions).
In 99% of our cases bigint isn't necessary and the ranger of normal
integer good enough.
I'll open an issue at ili2pg.
Thanks for you explanation, Matthias!
Andreas
On 2021-07-12 07:59, Matthias Kuhn wrote:
Hi
It depends on the implementation in the data provider (and normally on
the data type for the primary key).
In the postgres case, (up to) 32 bit integer primary keys are normally
used as fid.
With others like 64 bit integer, string or compound foreign keys it's
not possible to stick to this approach, so an internal fid to pk map is
generated by the provider at runtime.
64 bit integers cannot be directly reused as fid because QGIS stores
fids internally with 64 bit, but reserves the (negative, -1, -2, ...)
half of the available values for new, uncommitted features.
Matthias
On Thu, Jul 8, 2021 at 11:50 AM Andreas Neumann <andr...@qgis.org>
wrote:
Ok - that explains it.
It is quite confusing that QGIS uses a different internal ID than the
primary key column of the database. Is there a technical reason for
this behaviour?
Andreas
On Thu, 8 Jul 2021 at 11:43, Alexandre Neto <senhor.n...@gmail.com>
wrote:
As far as I remember @atlas_featureid has always returned the same as
the $id in the attributes table, which is kind of the internal row
number.
Alex
A quinta, 8/07/2021, 10:35, Andreas Neumann <andr...@qgis.org>
escreveu:
HI Jürgen,
Yes - I provided the primary key column
Here is my data source string:
service='edit' authcfg=sogis00 key='t_id' srid=2056 type=Polygon
checkPrimaryKeyUnicity='1'
table="alw_strukturverbesserungen"."projekt_aggregiert_v"
(geometrie_convex_hull) sql=geometrie_bbox IS NOT NULL
@atlas_featureid returns something like an internal "row number" or
similar, but not the column "t_id" as defined in the data source
string.
Andreas
On Thu, 8 Jul 2021 at 10:42, Jürgen E. Fischer <j...@norbit.de> wrote:
Hi Andreas,
On Thu, 08. Jul 2021 at 10:30:08 +0200, Andreas Neumann wrote:
attribute(@atlas_feature,'pkey_name'), but it is a little more
complicated
than @atlas_featureid - and I'm pretty sure that @atlas_featureid was
using
the pkey column in th past?
My data source for the atlas coverage layer is a Postgis View.
It's probably not using the column you expect for the feature id. Did
you
specify the key column when adding the view?
Jürgen
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