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https://issues.apache.org/jira/browse/LUCENE-7443?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shayan Tabrizi updated LUCENE-7443:
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Description:
I have a BooleanQuery including a BooleanClause.Occur.MUST clause and a
BooleanClause.Occur.FILTER clause. I then use the BooleanQuery in a
CustomScoreQuery. It seems that the filtering constraint is not enforced before
calculating the score in CustomScoreQuery and is enforced after the
calculation. This can cause performance issues, since CustomScoreQuery may
perform costly operations to rescore the BooleanQuery results. If the filter is
enforced before rescoring, much less documents may require rescoring in
CustomScoreQuery, and it does not make sense to spend a lot of processing for
documents we know will be filtered out.
More details:
The BooleanQuery is used as subQuery in the following constructor, and a costly
scoringQuery is used which is more rational to calculate it only when the
results of subQuery is not trivially filtered out because of the FILTER in the
boolean query.
public CustomScoreQuery(Query subQuery, FunctionQuery scoringQuery) {
was:I have a BooleanQuery including a BooleanClause.Occur.MUST clause and a
BooleanClause.Occur.FILTER clause. I then use the BooleanQuery in a
CustomScoreQuery. It seems that the filtering constraint is not enforced before
calculating the score in CustomScoreQuery and is enforced after the
calculation. This can cause performance issues, since CustomScoreQuery may
perform costly operations to rescore the BooleanQuery results. If the filter is
enforced before rescoring, much less documents may require rescoring in
CustomScoreQuery, and it does not make sense to spend a lot of processing for
documents we know will be filtered out.
> Enforcing BooleanClause.Occur.FILTER before CustomScoreQuery
> ------------------------------------------------------------
>
> Key: LUCENE-7443
> URL: https://issues.apache.org/jira/browse/LUCENE-7443
> Project: Lucene - Core
> Issue Type: Improvement
> Affects Versions: 6.2
> Reporter: Shayan Tabrizi
> Priority: Minor
>
> I have a BooleanQuery including a BooleanClause.Occur.MUST clause and a
> BooleanClause.Occur.FILTER clause. I then use the BooleanQuery in a
> CustomScoreQuery. It seems that the filtering constraint is not enforced
> before calculating the score in CustomScoreQuery and is enforced after the
> calculation. This can cause performance issues, since CustomScoreQuery may
> perform costly operations to rescore the BooleanQuery results. If the filter
> is enforced before rescoring, much less documents may require rescoring in
> CustomScoreQuery, and it does not make sense to spend a lot of processing for
> documents we know will be filtered out.
> More details:
> The BooleanQuery is used as subQuery in the following constructor, and a
> costly scoringQuery is used which is more rational to calculate it only when
> the results of subQuery is not trivially filtered out because of the FILTER
> in the boolean query.
> public CustomScoreQuery(Query subQuery, FunctionQuery scoringQuery) {
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