[Qgis-user] relation_aggregate issue with virtual fields

[Bernhard Ströbl]

Hi Andreas,
just a wild guess: Could it be related with the Umlaut "ä"

Bernhard

Am 26.06.2017 um 16:26 schrieb Neumann, Andreas:
> Hi,
>
> I use a relation_aggregate expression with the following syntax:
>
> relation_aggregate( relation:='Erdwärmesonden',
> aggregate:='sum',expression:="anzahl_sonden")
>
> In the output preview this works fine and I get an expected result,
> however, if I use the same expression in a virtual field, I always get
> NULL values.
>
> Any idea why this happens?
>
> Thanks,
>
> Andreas
>
>
>
>
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