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https://issues.apache.org/jira/browse/LUCENE-1541?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Uwe Schindler updated LUCENE-1541:
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Attachment: LUCENE-1541.patch
A first patch, completely untested:
- Javadocs need to be updated
- Tests with non-equidistant precision steps must be added
- Warning: Method signatures of RangeBuilders changed (order and contents, but
not types!!!)
- Maybe additional shortcuts in RangeFilters needed (the expert ctor now takes
field[] and precisionSteps[])
Does this look like an API, that may work for you? Currently I am not so happy
with the additional loop that determines the length of the trie array (in
trieCodeLong/Int) and the additional array allocations needed.
> Trie range - make trie range indexing more flexible
> ---------------------------------------------------
>
> Key: LUCENE-1541
> URL: https://issues.apache.org/jira/browse/LUCENE-1541
> Project: Lucene - Java
> Issue Type: Improvement
> Components: contrib/*
> Reporter: Ning Li
> Assignee: Uwe Schindler
> Priority: Minor
> Attachments: LUCENE-1541.patch
>
>
> In the current trie range implementation, a single precision step is
> specified. With a large precision step (say 8), a value is indexed in fewer
> terms (8) but the number of terms for a range can be large. With a small
> precision step (say 2), the number of terms for a range is smaller but a
> value is indexed in more terms (32).
> We want to add an option that different precision steps can be set for
> different precisions. An expert can use this option to keep the number of
> terms for a range small and at the same time index a value in a small number
> of terms. See the discussion in LUCENE-1470 that results in this issue.
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