Dear Beam development community, Hi! I am writing to share my design documentation for my proposed project: Implementing Pattern Recognition Function in Beam SQL <https://drive.google.com/file/d/1O8tm6tz9SxXKRTzVnsLVuQ1Zz4VNTUqT/view?usp=sharing>. Here is the link to my design documentation: https://s.apache.org/beam-sql-pattern-recognization
@Rui Wang <ruw...@google.com> helped me finish the documentation (I am very grateful for his help). I would very much appreciate it if there are additional suggestions! Many thanks, Qihang
