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Uwe Schindler commented on LUCENE-1345:
---------------------------------------
But where is the problem then: You only mean that BooleanQueries with only a
Filter clause are not sortable. In my opinion this is not a real problem: I do
for example use ConstantScoreQuery with a TrieRangeFilter as the only query
constraint. All results are returned with score=1, this is similar to a classic
SQL database. The default order of equal scores is index order, so it makes
sense for TopDocs. And if you additionally add a SortField it makes more sense
:)
So why not implement the three cases as described in my last message and use a
ConstantScoreQuery, if the Filter is alone in the BooleanQuery. In this case
all options can be used with a simple API with no difference between Filters
and Queries? The MatchCollector API in my opinion is also not needed. In the
case of constant score (=1.0) why not simple call collect(dociId, 1.0f)? Why do
we need a new API just because the score is not needed. Just define 1.0 as the
score (like ConstantScoreQuery does).
> Allow Filter as clause to BooleanQuery
> --------------------------------------
>
> Key: LUCENE-1345
> URL: https://issues.apache.org/jira/browse/LUCENE-1345
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Search
> Reporter: Paul Elschot
> Priority: Minor
> Fix For: 2.9
>
> Attachments: booleansetperf.txt, DisjunctionDISI.java,
> DisjunctionDISI.patch, DisjunctionDISI.patch,
> LUCENE-1345-Filter+Query-merge.patch, LUCENE-1345.patch, LUCENE-1345.patch,
> OpenBitSetIteratorExperiment.java, TestIteratorPerf.java,
> TestIteratorPerf.java
>
>
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