Github user arunmahadevan commented on the pull request:
https://github.com/apache/storm/pull/1141#issuecomment-189154415
@haohui In some cases like `true AND null` the query was still returning
results, hence I had changed `StormSqlFunctions.eq` and `StormSqlFunctions.ne`
to return false if either arg was null. The actual issue was in AND_EXPR and
OR_EXPR, so I fixed it and reverted the earlier change. I have also split the
change into two commits to review easily.
Currently the UDF schema definition is not exposed via SQL CREATE. Let me
know if you have any inputs on how this could be done.
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