Otto Fowler created METRON-1089:
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Summary: STELLAR Shell: Handle NoViableAltException with better
information
Key: METRON-1089
URL: https://issues.apache.org/jira/browse/METRON-1089
Project: Metron
Issue Type: Improvement
Reporter: Otto Fowler
Assignee: Otto Fowler
Antlr's NoViableAltException is thrown when Antlr cannot figure out what to do
when building the expression tree. This happens when the grammar is improperly
posed.
For example:
> TO_UPPER(IN)
Where IN is a reserved phrase, but is not posed correctly.
This is basically an invalid syntax exception. But buried in the cause of a
ParseException, it really is not helpful.
The shell should find the ParseException cause, and if it is this exception,
output a better message
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