On Wed, Mar 15, 2023 at 4:30 PM Gyorgy Tomcsanyi <
gyorgy.tomcsa...@microstep-mis.com> wrote:

> In this case we hoped the feature type customization feature could help.
> Even after setting all columns as nillable Geoserver still converts null
> values to zeros. Am I correct, that this setting should solve the problem?
>

No, it's happening too late, it applies an in memory transformation on top
of data that has been already read from the database
by JDBCDataStore.


> We might look into this more, could you please point us to the classes
> that could cause this?
>

I don't see much work arounds besides fixing the JDBC driver itself, there
is no way to influence creation of feature types
from outside the JDBCDataStore classes. This is a starting point if you
want to do more debugging:

https://github.com/geotools/geotools/blob/main/modules/library/jdbc/src/main/java/org/geotools/jdbc/JDBCFeatureSource.java#L848

Cheers
Andrea


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