Github user Leemoonsoo commented on the issue:
https://github.com/apache/zeppelin/pull/1005
@jongyoul Right, it's not dynamically configurable. Interpreter need to be
restarted to reconfigure.
I think it's possibly related to ZEPPELIN-999 and it's long term plan.
Let's say a user want to use jdbc interpreter for hive and mysql. Currently,
A. user can create single interpreter setting and create two configuration
for both hive and mysql connection. And select connection via %jdbc(hive) or
%jdbc(mysql).
B. or user can create two interpreter setting and each interpreter setting
have configuration for hive and mysql connection respectively. In this case,
select jdbc connection limited and annoying, because a notebook can not use two
or more same type of interpreter settings at the same time. So user have to
constantly bind/unbind interpreter setting to switch hive <-> mysql.
If our long term plan is generalize ZEPPELIN-999 and allow user use
interpreter setting alias for interpreter selection, like %hive, %mysql, then
all disadvantages of approach **B** will be eliminated.
Managing only single jdbc connection in single interpreter setting, with
generalized ZEPPELIN-999 will give advantages, like leverage [interpreter
authorization](https://issues.apache.org/jira/browse/ZEPPELIN-945). And in this
case, i was thinking simple returning appropriate scheduler from getScheduler()
by configuration would be enough.
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