seslamian at gmail
May 15, 2012, 4:16 AM
Post #3 of 3
(128 views)
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I got it. Thank you.
On Tue, May 15, 2012 at 2:31 PM, Uwe Schindler <uwe [at] thetaphi> wrote:
> > Hello
> > I have a question about this new feature in lucene 3.6 :
> > " The QueryParser now interprets * as an open end for range queries.
> > Literal asterisks may be represented by quoting or escaping (i.e. \* or
> > "*") Custom QueryParser subclasses overriding getRangeQuery() will be
> > passed null for any open endpoint"
> >
> > Does it mean if I have this : QueryParser queryParser = new QueryParser
> > (version,f,a);
> > queryParser.parse("blu*");
> >
> > QueryParser assumes it as a RangeQuery like this : [blu TO ]?!!!
> > Does it call getRangeQuery() method? or I'm making a mistake in the
> > concept of this feature... .
> >
>
> No it just means:
>
> A query like "[blu TO *]" is working and maps to
> TermRangeQuery.newStringRange(...,"blu",null,...), which is a half open
> range. Before you had to do this yourself in the
> newRangeQuery/getRangeQuery method (and you still need to do this for
> fields that are Numeric unless you use the new flxible query parser in
> contrib, which knows the existence of numeric fields since 3.4 or like
> so).
>
> The conventional wildcard syntax does not change.
>
> Uwe
>
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