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From "Christopher Currens (JIRA)" <j...@apache.org>
Subject [Lucene.Net] [jira] [Commented] (LUCENENET-423) QueryParser differences between Java and .NET
Date Tue, 14 Jun 2011 18:56:47 GMT

    [ https://issues.apache.org/jira/browse/LUCENENET-423?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13049334#comment-13049334
] 

Christopher Currens commented on LUCENENET-423:
-----------------------------------------------

.NET is far better at parsing date string, but it's the inconsistency between the Java version
and .NET version that I'm worried about.  Search the index with one query from java and you
get different results with the same query in .Net.

How compatible do we want to be with Java?

> QueryParser differences between Java and .NET
> ---------------------------------------------
>
>                 Key: LUCENENET-423
>                 URL: https://issues.apache.org/jira/browse/LUCENENET-423
>             Project: Lucene.Net
>          Issue Type: Bug
>    Affects Versions: Lucene.Net 2.9.2, Lucene.Net 2.9.4, Lucene.Net 2.9.4g
>            Reporter: Christopher Currens
>
> When trying to do a RangeQuery that uses dates in a certain format, .NET behaves differently
from its Java counterpart.  The code is the same between them, but as far as I can tell, it
appears that it is a difference in the way Java parses dates vs how .NET parses dates.  To
reproduce:
> {code:java}
> var queryParser = new QueryParser(Lucene.Net.Util.Version.LUCENE_29, "FullText", new
StandardAnalyzer(Lucene.Net.Util.Version.LUCENE_29));
> var query = queryParser.Parse("Field:[2001-01-17 TO 2001-01-20]");
> {code}
> You'll notice that query looks like the old DateField format (eg "0g1d64542").  If you
do the same query in Java (or Luke), you'll notice the query gets parsed as if it were a RangeQuery
of string.  AFAIK, Java cannot parse a string formatted in that way.  If you change the string
to use / instead of - in the java, you'll get one that uses DateResolutions and DateTools.DateToString().
> It seems an appropriate fix for this, if we wanted to keep this behavior similar to Java,
would be to write our own DateTime parser that behaved the same way to Java's parser.

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