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List:       lucene-user
Subject:    Re: Range query with Lucene7.7.1 on old indexes.
From:       Uwe Schindler <uwe () thetaphi ! de>
Date:       2021-09-01 20:26:33
Message-ID: 558F45B0-A752-45A4-B366-E2B6CB166B4E () thetaphi ! de
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Hi,
The old trie based range fields were deprecated in License 6 and removed in 7.

https://lucene.apache.org/core/6_6_0/core/org/apache/lucene/search/LegacyNumericRangeQuery.html


Upgrading the index does not help, because there's no easy way to convert trie fields \
to points and thats not done automatically. I wrote a hack to do this for a customer, \
but it requires a complete rewrite of index (read 5.x index with Lucene 6 and use \
addIndexes for merging into an empty index, while emulating points. The code is not \
open source and requires careful usage. Basically it enumerates the trie terms during \
merging and pushes them as flattened BKD tree. Lucene will rebuild the full tree \
while merging.

Uwe

Am 1. September 2021 17:20:24 UTC schrieb Antony Joseph \
<antony.dev.webmail@gmail.com>:
> Hi all,
> 
> Using: python 2.7.14, pylucene 4.10.0
> 
> Index:
> 
> xdate = long("20190101183030")
> doc.add(LongField('xdate', xdate, Field.Store.YES)) # stored and not
> analyzed
> 
> Query:
> 
> query = NumericRangeQuery.newLongRange("xdate", long("20190101000000"),
> long("20190101115959"), True, True)
> 
> I am getting the results. It works fine.
> 
> Now i upgraded the lucene index 4.10.0 to lucene 7.7.1
> 
> Using : Python3.8.11, pylucene 7.7.1
> 
> I am searching on my old indexes, using the following queries
> 
> query = NumericDocValuesField.newSlowRangeQuery("xdate",
> long("20190101000000"), long("20190101115959"))
> 
> No results.
> 
> query = LongPoint.newRangeQuery("xdate", long("20190101000000"),
> long("20190101115959"))
> 
> No results.
> 
> How to get the results on my old indexes using date range query?
> 
> Can anyone help?
> 
> Thanks

--
Uwe Schindler
Achterdiek 19, 28357 Bremen
https://www.thetaphi.de



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