> Calling UDF is hard process. We must emulate C call stack therefore parameters
> are multiple times copied here and there, making CSTRING from CHAR /
> VARCHAR is also headache - there is no place for terminating zero in the end
> of
> that string, therefore memory allocation takes place.
> Almost all of that migth be avoided calling BY DESCRIPTOR but looks like
> there are
> not too much UDF doing this.
That would be incorrect. A significant number of our UDFs pass parameters by
descriptor.
What is the use case for them not to be handled that way?
As I understood it, passing by descriptor makes the call much faster (for the
reasons you outline), no?
Sean
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