lucene-solr-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Alexandre Rafalovitch <arafa...@gmail.com>
Subject Re: How does text-rev work?
Date Sat, 10 Jan 2015 06:13:10 GMT
So, Query Parser does some sort of magic and looks for the field with
the same name and _rev suffix?

But what populates that field? In the example schema, it seems to be
standalone and empty. Is there a copyField missing?

Regards,
   Alex.
----
Sign up for my Solr resources newsletter at http://www.solr-start.com/


On 9 January 2015 at 17:07, Jack Krupansky <jack.krupansky@gmail.com> wrote:
> Or a Jira to document it.
>
> The basic idea is that if a normal leading wildcard is too slow, the user
> can index a copy of their text fields using the text_rev type, which
> indexes terms with their characters reversed and with a special marker.
> Then the query parser detects a leading wildcard and that the field type
> uses the reversed wildcard filter, and then it generates a wildcard query
> that using the reversed query token and wildcard pattern so that the
> leading wildcard becomes a trailing wildcard or prefix query
>
>
> -- Jack Krupansky
>
> On Fri, Jan 9, 2015 at 3:15 PM, Alexandre Rafalovitch <arafalov@gmail.com>
> wrote:
>
>> Anybody? Otherwise, I guess it is a JIRA to delete the unused field?
>>
>> Regards,
>>    Alex.
>> ----
>> Sign up for my Solr resources newsletter at http://www.solr-start.com/
>>
>>
>> On 28 December 2014 at 13:16, Alexandre Rafalovitch <arafalov@gmail.com>
>> wrote:
>> > I am looking at the collection1/techproducts schema and I can't figure
>> > out how the reversed wildcard example is supposed to work.
>> >
>> > We define text_general_rev type and text_rev field, but we don't seem
>> > to be populating it at any point. And running the example does not
>> > seem to show any tokens in the field even when the non-inverted text
>> > field does have some.
>> >
>> > Apparently, there is some magic in the QueryParser to do something
>> > about this at query time, but I see no explanation of what is supposed
>> > to happen at the index/schema time.
>> >
>> > Anybody has the skinny on this one?
>> >
>> > Regards,
>> >    Alex.
>> > ----
>> > Sign up for my Solr resources newsletter at http://www.solr-start.com/
>>

Mime
View raw message