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From "Chuck Williams" <ch...@manawiz.com>
Subject RE: NUMERIC RANGE BOOLEAN
Date Fri, 17 Dec 2004 06:11:50 GMT
Errata:
  b.  [$2 to 4]

Chuck

  > -----Original Message-----
  > From: Chuck Williams [mailto:chuck@manawiz.com]
  > Sent: Thursday, December 16, 2004 9:58 PM
  > To: Lucene Users List
  > Subject: RE: NUMERIC RANGE BOOLEAN
  > 
  > Karthik,
  > 
  > RangeQuery expands into a BooleanQuery containing all of the terms
in
  > the index that fall within the range.  By default, BooleanQuery's
can
  > have at most 1,024 terms.  So, if your index has more than 1,024
  > different prices that fall within your range then you will hit this
  > exception.  What matters is distinct prices, not multiple items.
E.g.,
  > it's ok to have 10,000 items at $5 -- that's just one price.  But
more
  > than 1,024 distinct prices is a problem.
  > 
  > You can fix this at least a couple different ways.
  >   1.  Increase the maximum number of clauses allowed in a
BooleanQuery
  > (see BooleanQuery.maxClauseCount).  Note that this is done at a cost
of
  > performance.
  >   2.  Restructure your indexed prices and range query to reduce the
  > number of clauses.  E.g., index dollars and cents as two different
  > fields.  Then, for a range like $1.33 to $5.27, construct an or of 3
  > queries:
  >     a.  $1 and [33 to 99 cents]
  >     b.  [$2 to $5]
  >     c.  $5 and [0 to 27 cents]
  > 
  > I don't know about RangeFilter, but look at QueryFilter.  You can
use it
  > with a RangeQuery to implement a range filter.  However, I think
you'll
  > hit the same issue, so Erik may be referring to a new mechanism that
is
  > not in 1.4.3.
  > 
  > Chuck
  > 
  >   > -----Original Message-----
  >   > From: Karthik N S [mailto:karthik@controlnet.co.in]
  >   > Sent: Thursday, December 16, 2004 9:38 PM
  >   > To: Lucene Users List
  >   > Subject: RE: NUMERIC RANGE BOOLEAN
  >   >
  >   > Hi Erik
  >   >
  >   > Apologies..........
  >   >
  >   >
  >   >   Sometimes  I find it hard to understnad the Answer u  reply
....
  >   >
  >   >
  >   >
  >   >    1) I looked at the the Wiki and similarly padded '0' [ Total
  > Length =
  >   > 8 ]
  >   > at the time of indexing
  >   >
  >   >     so before Indexprocess the values will be   $ 10.25 , $ 0.50
,$
  >   > 15.50.....
  >   >
  >   >     After padding and indexing finally [ Used Luke to moniter ]
the
  >   > values
  >   > were 00000010.25 ,00000000.25,00000015.50
  >   >
  >   >
  >   >   2) I did not find the RangeFilter API in Lucene1.4.3 [is it
  > recently
  >   > added
  >   > if so How Do I use the same some code snippets
  >   >      please ]
  >   >
  >   >
  >   >
  >   >
  >   > with regards
  >   > Karthik
  >   >
  >   >
  >   >
  >   > -----Original Message-----
  >   > From: Erik Hatcher [mailto:erik@ehatchersolutions.com]
  >   > Sent: Thursday, December 16, 2004 6:55 PM
  >   > To: Lucene Users List
  >   > Subject: Re: NUMERIC RANGE BOOLEAN
  >   >
  >   >
  >   > On Dec 16, 2004, at 7:17 AM, Karthik N S wrote:
  >   > > We have to get the All the Hits int the Range ,
  >   > >
  >   > >    So  0.99 cents IS & ALWAYS be 0.99 cents  on which we do
the
  > price
  >   > > Comaprison from consumer point of view .
  >   > >
  >   > >
  >   > > I hope  I have answered u'r Question
  >   >
  >   >
  >   > No, in fact, you have not.  If you want to continue to receive
my
  > help
  >   > here, you need to provide *details*.  You pose often ambiguous
and
  > hard
  >   > to decipher questions.  Please help us help you by answering the
  >   > questions we ask precisely.  What are the values (exact string
  > values)
  >   > in that field?  Please also read the wiki page on indexing
numeric
  >   > values.
  >   >
  >   > Look at using the new RangeFilter rather than a RangeQuery due
to
  > the
  >   > noted issues with doing a RangeQuery.
  >   >
  >   > 	Erik
  >   >
  >   >
  >   > >
  >   > >
  >   > > With regards
  >   > > Karthik
  >   > >
  >   > > -----Original Message-----
  >   > > From: Erik Hatcher [mailto:erik@ehatchersolutions.com]
  >   > > Sent: Thursday, December 16, 2004 5:24 PM
  >   > > To: Lucene Users List
  >   > > Subject: Re: NUMERIC RANGE BOOLEAN
  >   > >
  >   > >
  >   > > On Dec 16, 2004, at 5:03 AM, Morus Walter wrote:
  >   > >> Erik Hatcher writes:
  >   > >>
  >   > >>> TooManyClauses exception occurs when a query such as a
  > RangeQuery
  >   > >>> expands to more than 1024 terms.  I don't see how this could
be
  > the
  >   > >>> case in the query you provided - are you certain that is the
  > query
  >   > >>> that
  >   > >>> generated the error?
  >   > >>>
  >   > >> Why not: the terms might be 00000003 00000003.1 00000003.11
...
  >   > >>
  >   > >> So the question is, how do his terms look like...
  >   > >
  >   > > Ah, good point! So, Karthik - what are are the values of those
  > terms?
  >   > >
  >   > > Pragmatically, do you really need to do a range involving the
  > cents of
  >   > > a price?
  >   > >
  >   > > 	Erik
  >   > >
  >   > >
  >   > >
  >
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