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Posted to solr-user@lucene.apache.org by Alexandre Rafalovitch <ar...@gmail.com> on 2015/01/09 21:15:54 UTC
Re: How does text-rev work?
Anybody? Otherwise, I guess it is a JIRA to delete the unused field?
Regards,
Alex.
----
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On 28 December 2014 at 13:16, Alexandre Rafalovitch <ar...@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/
Re: How does text-rev work?
Posted by Jack Krupansky <ja...@gmail.com>.
No, it's just what I said. Read the original Jira (from Solr 1.4!):
https://issues.apache.org/jira/browse/SOLR-1321
You, the user, need to specify and populate a reversed wildcard field if
that is want you want - it is not magic and not automatic.
This should be documented as an "expert" feature. And there should be doc
on how to use it.
I do have some doc in my e-book, with some examples, but even that does not
show the complete end-to-end config and schema.
-- Jack Krupansky
On Sat, Jan 10, 2015 at 1:13 AM, Alexandre Rafalovitch <ar...@gmail.com>
wrote:
> 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 <ja...@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/
> >>
>
Re: How does text-rev work?
Posted by Alexandre Rafalovitch <ar...@gmail.com>.
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 <ja...@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 <ar...@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 <ar...@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/
>>
Re: How does text-rev work?
Posted by Jack Krupansky <ja...@gmail.com>.
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 <ar...@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 <ar...@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/
>