Dear Calcite Administrators, my name is Lam Gia Thuan, a CS student in Germany. I recently got to work with Calcite for embedding SQL into Java and I realized that many of Calcite examples were not working at all. Among them is TUMBLE, the function I need but unfortunately, not working since there is no implementation.
I have written a mail to ask about it but never got a reply, so I have decided that i should implement it myself. At the moment, I already implemented it, so I wonder if it is possible for me to submit this contribution. I want to commit it so that if a new version of Calcite is released, I will not need to change the implementation anymore. If it is possible, could you please tell me how I should do it. Thank you for creating Calcite. I am looking forward to hearing from you. LAM GIA THUAN Informatikstudent an der FH Frankfurt
