[Qgis-user] Readonly gpkg

[Even Rouault]

Resolution attempt in https://github.com/qgis/QGIS/pull/47098

Even

Le 11/01/2022 à 15:10, pergler at gmail.com a écrit :
>
> I’ve packaged a number of read-only layers (e.g. contours, 
> watercourses) for my area of interest into one gpkg. However, QGIS 
> writes changes to this gpkg every time it is opened, even if the 
> layers themselves are never edited. I think this is related to SQLite 
> wal journaling.
>
> It’s an annoyance since it’s a large file that gets unnecessarily 
> reuploaded in every incremental backup, and when I’m in the field, 
> that’s sometimes over a bad 3G cell connection.
>
> I’ve tried making the gpkg read-only, which hasn’t crashed anything in 
> brief testing and generates no warnings. However, it feels risky, and 
> clearly QGIS or OGR aren’t fully happy, since the temporary shm and 
> wal files don’t get deleted on exit. So I’m hesitant to continue doing 
> this for fear of a crash when I’m actually doing something useful.
>
> Is there a better way to tell QGIS to not write to a gpkg in which all 
> layers are only being accessed read-only?
>
> Thanks!
>
> ---
>
> Martin Pergler
>
>
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