[Xapian-tickets] [Xapian] #447: QueryParser: Confusion with Boolean term and -.

[Xapian]

#447: QueryParser: Confusion with Boolean term and -.
--------------------+-------------------------------------------------------
 Reporter:  cworth  |       Owner:  olly 
     Type:  defect  |      Status:  new  
 Priority:  normal  |   Milestone:       
Component:  Other   |     Version:  1.1.3
 Severity:  normal  |   Blockedby:       
 Platform:  All     |    Blocking:       
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 Here's a query string handled just fine by the query parser:

         tag:foo and tag:deleted

 which expands (in notmuch) to:

         Xapian::Query((Tmail AND 0 * Kfoo AND 0 * Kdeleted))

 Meanwhile, this very similar query string (adding only -):

         tag:foo and -tag:deleted

 instead expands to:

         Xapian::Query((Tmail AND (Zand:(pos=1) FILTER (Kfoo OR
 Kdeleted))))

 Note that things have gone quite insane here, (with the Boolean
 operator now being treated as a term). This seems to happen whenever a
 Boolean operator appears adjacent to a word starting with a
 non-alphabetic character, (but I haven't characterized the bug
 perfectly yet).

 The same bug occurs with the operator in all caps (AND).

 Here are the flags that notmuch is passing to the query parser:

         (Xapian::QueryParser::FLAG_BOOLEAN |
          Xapian::QueryParser::FLAG_PHRASE |
          Xapian::QueryParser::FLAG_LOVEHATE |
          Xapian::QueryParser::FLAG_BOOLEAN_ANY_CASE |
          Xapian::QueryParser::FLAG_WILDCARD |
          Xapian::QueryParser::FLAG_PURE_NOT)

 I'd love to hear any ideas, and especially a fix of course. :-)

 -Carl

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Ticket URL: <http://trac.xapian.org/ticket/447>
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