Github user zjffdu commented on the issue:
https://github.com/apache/zeppelin/pull/2442
@tinkoff-dwh I just realised that zeppelin already support hooks for
interpreter. I think you don't need to do it specifically for jdbc interpreter,
instead we could introduce one general property like
`zeppelin.interpreter.pre_code` which could execute pre code before running the
paragraph text. What do you think ? ---
