Return type of user defined function

[vforchi]

Hi,

I'm trying to define a UDF with the following signature: INTERSECTION(region1 region, region2 region) -> region I provided a class that implements it and it works, but if I use it in a select I don't get the desired format because the return value is interpreted as UNKNOWN instead of REGION.

Do I have to define it in my UDF class? IF so, how?