# Block-max WAND for FunctionScoreQuery & CollapseTopDocsCollector

**URL:** <https://discuss.elastic.co/t/block-max-wand-for-functionscorequery-collapsetopdocscollector/228232>\
**Category:** Elasticsearch\
**Created:** [April 16, 2020, 2:22am UTC](https://discuss.elastic.co/t/block-max-wand-for-functionscorequery-collapsetopdocscollector/228232 "2020-04-16T02:22:09Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![unix1986](https://avatars.discourse-cdn.com/v4/letter/u/4491bb/32.png) [@unix1986](https://discuss.elastic.co/u/unix1986)\
**Post date:** [April 16, 2020, 2:22am UTC](https://discuss.elastic.co/t/block-max-wand-for-functionscorequery-collapsetopdocscollector/228232/1 "2020-04-16T02:22:09Z")

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The block-max WAND algorithm in lucene，can it be applied to FunctionScoreQuery and CollapseTopDocsCollector？I think it can't，but i am not sure. I have not found the relevant implement in elasticsearch.

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [May 14, 2020, 2:22am UTC](https://discuss.elastic.co/t/block-max-wand-for-functionscorequery-collapsetopdocscollector/228232/2 "2020-05-14T02:22:17Z")

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