[ http://issues.apache.org/jira/browse/LUCENE-573?page=all ]
Michael Busch updated LUCENE-573:
---------------------------------
Attachment: escaped_quotes_inside_phrases.patch
Tomislav,
thanks for finding this problem in the queryparser. I attach a patch file that
fixes this bug. Now the queryparser does not recognize an escaped quote inside
a phrase as the phrase terminator anymore.
I also updated the testcase org.apache.lucene.queryParser.TestQueryParser to
test escaped quotes within phrases. This testcase fails with the old version of
the queryparser and runs successful with the patched version. I added the
following three tests to the testEscaped() method:
(1) assertQueryEquals("a \\\"b c\\\" d", a, "a \"b c\" d");
(2) assertQueryEquals("\"a \\+b c d\"", a, "\"a \\+b c d\"");
(3) assertQueryEquals("\"a \\\"b c\\\" d\"", a, "\"a \\\"b c\\\" d\"");
Please notice that (3) is different from your second suggested assert. You
assume that the queryparser unescapes the quotes inside the phrase, but the
queryparser does not unescape *any* escaped characters inside a phrase. You can
see that in (2), where the escaped + (plus) character does not become unescaped.
Michael
> Escaped quotes inside a phrase cause a ParseException
> -----------------------------------------------------
>
> Key: LUCENE-573
> URL: http://issues.apache.org/jira/browse/LUCENE-573
> Project: Lucene - Java
> Issue Type: Bug
> Components: QueryParser
> Affects Versions: 1.9
> Environment: Debian Sarge, Sun JDK 1.4.2
> Reporter: Tomislav Gountchev
> Priority: Minor
> Attachments: escaped_quotes_inside_phrases.patch
>
>
> QueryParser cannot handle escaped quotes when inside a phrase. Escaped quotes
> not in a phrase are not a problem. This can be added to
> TestQueryParser.testEscaped() to demonstrate the issue - the second assert
> throws an exception:
> assertQueryEquals("a \\\"b c\\\" d", a, "a \"b c\" d");
> assertQueryEquals("\"a \\\"b c\\\" d\"", a, "\"a \"b c\" d\"");
> See also this thread:
> http://www.nabble.com/ParseException-with-escaped-quotes-in-a-phrase-t1647115.html
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