Github user hyunsik commented on the pull request:
https://github.com/apache/tajo/pull/80#issuecomment-49544500
In my opinion, the current approach using on-change event is also good. It
is definitely convenient for users. Because only a few of users who use some
web browsers which does not support java script will use submit button, we
should kept on-change event for most of users.
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