Well, you don't need to "store" both copies since they will be the same.
They both need to be "indexed" (string form for grouping, text form for
keyword search), but only one needs to be "stored".
-- Jack Krupansky
-----Original Message-----
From: Ramprakash Ramamoorthy
Sent: Tuesday, February 19, 2013 1:07 AM
To: java-user@lucene.apache.org
Subject: Re: Grouping and tokens
On Tue, Feb 19, 2013 at 12:57 PM, Jack Krupansky
<j...@basetechnology.com>wrote:
Oops, sorry for the "Solr" answer. In Lucene you need to simply index the
same value, once as a raw string and a second time as a tokenized text
field. Grouping would use the raw string version of the data.
Yeah, thanks Jack. Was just wondering if there would be a better alternate
rather than 2x storing. But I don't see any. Thanks again.
-- Jack Krupansky
-----Original Message----- From: Jack Krupansky
Sent: Monday, February 18, 2013 11:21 PM
To: java-user@lucene.apache.org
Subject: Re: Grouping and tokens
Okay, so, fields that would normally need to be tokenized must be stored
as
both raw strings for grouping and tokenized text for keyword search.
Simply
use copyField to copy from one to the other.
-- Jack Krupansky
-----Original Message----- From: Ramprakash Ramamoorthy
Sent: Monday, February 18, 2013 11:13 PM
To: java-user@lucene.apache.org
Subject: Re: Grouping and tokens
On Mon, Feb 18, 2013 at 9:47 PM, Jack Krupansky
<j...@basetechnology.com>**wrote:
Please clarify exactly what you want to group by - give a specific
example
that makes it clear what terms should affect grouping and which
shouldn't.
Assume I am indexing a library data. Say there are the following fields
for
a particular book.
1. Published
2. Language
3. Genre
4. Author
5. Title
6. ISBN
While search time, the user can ask to group by any of the above
fields, which means all of them are not supposed to be tokenized. So as I
had told earlier, there is a book titled "Fifty shades of gray" and the
user searches for "shades". The result turns up in case the field is
tokenized. But here it doesn't, since it isn't tokenized. Hope I am clear?
In a nutshell, how do I use a groupby on a field that is also
tokenized?
-- Jack Krupansky
-----Original Message----- From: Ramprakash Ramamoorthy
Sent: Monday, February 18, 2013 6:12 AM
To: java-user@lucene.apache.org
Subject: Grouping and tokens
Hello all,
From the grouping javadoc, I read that fields that are supposed to be
grouped should not be tokenized. I have an use case where the user has
the
freedom to group by any field during search time.
Now that only tokenized fields are eligible for grouping, this is
creating an issue with my search. Say for instance the book "*Fifty
shades
of grey*" when tokenized and searched for "*shades*" turns up in the
result. However this is not the case when I have it as a non-tokenized
field (using StandardAnalyzer-Version4.1).
How do I go about this? Is indexing a tokenized and non-tokenized
version of the same field the only go? I am afraid its way too costly!
Thanks in advance for your valuable inputs.
--
With Thanks and Regards,
Ramprakash Ramamoorthy,
India,
+91 9626975420
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India.
+91 9626975420
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