Hi devs,
There is a discrepancy in parsing behavior between PrecedenceQueryParser
and QueryParser if the query is both single term and negative-only, e.g.
"-exchange:nasdaq".
In this case with QueryParser the returned Query object is instanceof
BooleanQuery whereas with PrecedenceQueryParser it's of TermQuery
instance. This is inconvenient since with the parsed query which is an
instance of BooleanQuery class it's easy to check if the user-supplied
query is negative only. This is not possible with TermQuery. This also
means that the PrecedenceQueryParser parses "-exchange:nasdaq" to
"+exchange:nasdaq". What's interesting, there is no such problem with
negative-only queries consisting of at least two terms.
Is the above behavior a "feature" of the contrib parser or a bug?
Thanks,
Wojtek Burzynski
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