Github user cestella commented on the issue:
https://github.com/apache/incubator-metron/pull/404
One further thought: regarding the validation, I just want to point out
that I'd be ok for validation to not *execute* the statement, but only validate
syntactic correctness and function existence. It just means that we will need
to augment `StellarProcessorUtils` to execute with a map that returns null for
its variables to ensure our tests continue to cover the same way.
I do think we should retain the functionality that comparisons involving
nulls operate in a sensible way. I think any comparison involving `null`
should return `false` sort of like how doubles function with `NaN`. Also, the
decisions made here should be included in the stellar section of the README.md
as part of this PR.
I'm coming around about `==` operating strictly for doubles. I could see
how that would violate the principle of least surprise for people coming from
other languages. I guess I never had much use for `==` with `double`s and
thought I could automatically save people some obvious errors, but I think the
current approach is problematic and probably should be scrapped for what this
PR does.
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