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feat(query): add topn runtime filter in native storage format#9738

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BohuTANG merged 10 commits intodatabendlabs:mainfromsundy-li:topn
Jan 27, 2023

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@sundy-lisundy-li commentedJan 26, 2023•
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I hereby agree to the terms of the CLA available at:https://databend.rs/dev/policies/cla/

Summary

Summary about this PR

If we push down the sort + limit to storage level, we can haveTopN opt.

But it must work with runtime predication (prewhere) + Page index optimization , so currently we only have it in native storage format.

Queryselect * from hits_page where URL like '%google%' order by EventTime desc limit 10; can works 5 times faster.

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vercelbot commentedJan 26, 2023•
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@mergifymergifybot added the pr-featurethis PR introduces a new feature to the codebase labelJan 26, 2023
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BohuTANG commentedJan 27, 2023•
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Good idea.
Can we useOrderBy(min-max)+ Limit in reading fuse block data to reduce the block size?

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Good idea. Can we useOrderBy(min-max)+ Limit in reading fuse block data to reduce the block size?

Unless we have prewhere and page index.

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@sundy-lisundy-li marked this pull request as ready for reviewJanuary 27, 2023 03:24
Co-authored-by: BohuTANG <overred.shuttler@gmail.com>
@BohuTANGBohuTANG merged commit3ea04f2 intodatabendlabs:mainJan 27, 2023
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@BohuTANGBohuTANGBohuTANG approved these changes

@zhang2014zhang2014Awaiting requested review from zhang2014

@RinChanNOWWWRinChanNOWWWAwaiting requested review from RinChanNOWWW

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