[Qgis-user] relation_aggregate issue with virtual fields

[DelazJ]

Hi,
Looks like https://issues.qgis.org/issues/15930

H.

2017-06-26 16:28 GMT+02:00 Bernhard Ströbl <bernhard.stroebl at jena.de>:

> 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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>
>
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