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Posted to java-user@lucene.apache.org by "Paul J. Lucas" <pa...@lucasmail.org> on 2009/03/19 17:41:07 UTC
All the values of a particular field
The Lucene FAQ has a Q, "How do I retrieve all the values of a
particular field that exists within an index, across all documents?"
and gives some code. However, it looks like that code returns only
unique values. How does one get all values including duplicates?
- Paul
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Re: All the values of a particular field
Posted by "Paul J. Lucas" <pa...@lucasmail.org>.
Uhm, a code snippet, perhaps?? Thanks.
- Paul
On Mar 19, 2009, at 10:26 AM, Erick Erickson wrote:
> See TermEnum/TermDocs.....
>
> On Thu, Mar 19, 2009 at 12:41 PM, Paul J. Lucas <pa...@lucasmail.org>
> wrote:
>
>> The Lucene FAQ has a Q, "How do I retrieve all the values of a
>> particular
>> field that exists within an index, across all documents?" and gives
>> some
>> code. However, it looks like that code returns only unique
>> values. How
>> does one get all values including duplicates?
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Re: All the values of a particular field
Posted by "Paul J. Lucas" <pa...@lucasmail.org>.
Actually, the code I had previously was:
TermEnum e = reader.terms( new Term( fieldName, "" ) );
Collection<String> values = new LinkedList<String>();
while ( fieldName.equals( e.term().field() ) ) {
String text = e.term().text();
if ( text.length() > 0 )
values.add( text );
if ( !e.next() )
break;
}
I think all I have to do is repeat the add() when docFreq() > 1 like:
if ( text.length() > 0 )
for ( int i = e.docFreq(); i > 0; --i )
values.add( text );
Right?
- Paul
On Mar 19, 2009, at 10:26 AM, Erick Erickson wrote:
> See TermEnum/TermDocs.....
>
> On Thu, Mar 19, 2009 at 12:41 PM, Paul J. Lucas <pa...@lucasmail.org>
> wrote:
>
>> The Lucene FAQ has a Q, "How do I retrieve all the values of a
>> particular
>> field that exists within an index, across all documents?" and gives
>> some
>> code. However, it looks like that code returns only unique
>> values. How
>> does one get all values including duplicates?
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To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
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Re: All the values of a particular field
Posted by Erick Erickson <er...@gmail.com>.
See TermEnum/TermDocs.....
On Thu, Mar 19, 2009 at 12:41 PM, Paul J. Lucas <pa...@lucasmail.org> wrote:
> The Lucene FAQ has a Q, "How do I retrieve all the values of a particular
> field that exists within an index, across all documents?" and gives some
> code. However, it looks like that code returns only unique values. How
> does one get all values including duplicates?
>
> - Paul
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
> For additional commands, e-mail: java-user-help@lucene.apache.org
>
>