[Qgis-developer] editing capabilities problem in the postgres data provider

[Jürgen E. Fischer]

Hi Salvatore,

On Wed, 26. Aug 2015 at 14:04:56 +0200, Salvatore Larosa wrote:
> Why it is not possible to modify the existing geometries if the
> primary key is not present?

Because ctids are very flaky - any modification to the row might or will change
it - without QGIS noticing.  So previously selected features might mysteriously
loose their selection, subsequent updates or deletes might fail or even worse
update or delete a different feature.


Jürgen

-- 
Jürgen E. Fischer           norBIT GmbH             Tel. +49-4931-918175-31
Dipl.-Inf. (FH)             Rheinstraße 13          Fax. +49-4931-918175-50
Software Engineer           D-26506 Norden             http://www.norbit.de
QGIS release manager (PSC)  Germany                    IRC: jef on FreeNode                         
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