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From "Jack Krupansky (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SOLR-3740) ExtendedDismaxQParser (edismax) does not obey q.op for parenthesized sub-queries
Date Sat, 18 Aug 2012 00:08:38 GMT
Jack Krupansky created SOLR-3740:
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             Summary: ExtendedDismaxQParser (edismax) does not obey q.op for parenthesized
sub-queries
                 Key: SOLR-3740
                 URL: https://issues.apache.org/jira/browse/SOLR-3740
             Project: Solr
          Issue Type: Bug
          Components: query parsers
    Affects Versions: 4.0-BETA, 3.6.1
            Reporter: Jack Krupansky
             Fix For: 4.0


For a query such as "cat dog (fox bat fish)" with &q.op=AND, the default query operator
is only set to AND for the top-level query, and not for the parenthesize sub-query. This is
not documented behavior and rather surprising.

This happens because edismax only simulates the default operator by forcing "mm" (minMatch)
to 100% for the top-level BooleanQuery alone and never sets the default query operator when
it invokes the classic Lucene Query parser which in turn is performing parsing and query generation
for the parenthesize sub-query.

One solution is for edismax to always set the default query operator when calling the classic
Lucene query parser, or at least when q.op=AND.

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