Github user cestella commented on the issue:
https://github.com/apache/incubator-metron/pull/293
So, yes, a couple of things need to be ensured for stellar functions:
* The output of the call is serializable via kryo (the profiler stores the
output of stellar statements in HBase)
* It passes the `validate` call
Validate is intended to check syntactic errors and it does so by passing a
VariableResolver that returns null for every variable. I will admit that I've
been thinking this should be rethought and we should do this another way:
* Have a special implementation of StellarBaseListener that barfs if
function resolution happens, but doesn't actually apply functions
* Uses the normal Stellar Lexer to ensure syntactic errors
This should ensure that the stellar statement is valid syntactically IMO.
Thoughts?
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