Hello Charles,
Although the idea seems good in general, actual implementation may cause
much more issues than solve. If you are thinking about distributed cache,
then every cache miss on current drillbit will cause network request to
other drillbits, passing function arguments along with ids of
Hi Charles,
In general, we cannot know if a function is deterministic. Your function might
be rand(seed, max). It might do a JDBC lookup or a REST call. Drill can't know
(unless we add some way to know that a function is deterministic: maybe a
@Deterministic annotation.)
That said, you can
Hello Drill Devs,
I have a question about UDFs. Let's say you have a non-trivial UDF called
foo(x,y) which returns some value. Assuming that if the arguments are the
same, the function foo() will return the same result, does Drill have any
optimizations to prevent running the non-trivial
