On Feb 1, 2007, at 5:03 PM, Peter Keegan wrote:
OK, I see that I'm not the first to discover this behavior of
QueryParser.
Can anyone vouch for the integrity of the PrecedenceQueryParser here:
http://svn.apache.org/repos/asf/lucene/java/trunk/contrib/
miscellaneous/src/java/org/apache/lucene/queryParser/precedence/
PrecedenceQueryParser was my tinkering attempt to make it more
logically handle precedence. I don't recall the exact issues that
occur, though a JIRA issue was just filed with one:
<https://issues.apache.org/jira/browse/LUCENE-792>
"NOT foo AND baz" is parsed as "-(+foo +baz)" instead of "-foo
+bar".
(I'm setting parser.setDefaultOperator
(PrecedenceQueryParser.AND_OPERATOR) but the issue applies otherwise
too.)
I believe the test case points out some potential issues. In other
words, PrecedenceQueryParser is a work-in-progress that I no longer
am working on myself. Improvements to it welcome. Query parsing is
tricky business!
Erik
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