[QGIS-Developer] Processing: questions on temporary files

[Matthias Kuhn]

Hi Richard

On 12/6/19 2:07 PM, Richard Duivenvoorde wrote:
> On 06/12/2019 07.58, Matthias Kuhn wrote:
>> On 12/6/19 7:52 AM, Alexander Bruy wrote:
>>> пт, 6 груд. 2019 о 08:44 Matthias Kuhn <matthias at opengis.ch> пише:
>>>> Meanwhile, why not use a well known spatial data file format?
>>> I can be wrong, but using spatial data formats can be lossy in some
>>> cases,
>>> e.g. shapefile/dbf has limits for the field name length and field
>>> length. Some
>>> other formats may lack support for some datatypes, like datetime etc.
>>>
>>> Of course is there is a format which allow fast and lossless storage
>>> we should
>>> use it
>> I think GeoPackage should be fairly stable for this kind of usage.
> Well, yes, may be, but given I've seen some issue (locks/crashes etc
> etc) with GeoPackages, and myself having issue with true
> DateTime/TimeZones's in it... I thought to propose an alternative :-)

Since these files are created as an output and no concurrent access is 
expected, I don't think there's a risk for locking issues here.

For DateTime/TimeZones etc, are we sure we will be in a better situation 
with "our own" serialized format?

> My impression is that the community is experiencing some drawbacks with
> GeoPackage/SQLite, but maybe I'm wrong.

Other proposals are very welcome as well. I don't insist on GeoPackage. 
All I do is being a bit skeptic that rolling our own format will 
magically solve problems that one hundred other formats did not solve :-)

Regards

Matthias

>
> Regards,
>
> Richard Duivenvoorde
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