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Pull requests

• Answer sum, avg and sumCount from per-part statistics

  comp-query-optimizermemorypr-performance
  #123950·NIKTONIKTO717 opened Oct 5, 2026Member·

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  6

• Avoid unnecessary copies of function parameters

  pr-performance
  #123492·NIKTONIKTO717 opened Oct 2, 2026Member·

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  4

• Top-K skip bitmap on the first key column of a composite key

  comp-aggregationpr-performance
  #122859·NIKTONIKTO717 opened Sep 29, 2026Member·

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  6

  

• Top-K GROUP BY skips batch key serialization of mostly skipped blocks

  comp-aggregationpr-performance
  #122858·NIKTONIKTO717 opened Sep 29, 2026Member·

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  2

  

• filterArraysImpl: if only empty rows are dropped, reserve whole column

  comp-data-typespr-performance
  #122856·NIKTONIKTO717 opened Sep 29, 2026Member·

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  9

• Adaptive GROUP BY drain reserves without the 1.25x headroom

  comp-aggregationpr-performance
  #122855·NIKTONIKTO717 opened Sep 29, 2026Member·

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  5

  

• ZSTD codec reuses its contexts

  comp-codecspr-performance
  #122854·NIKTONIKTO717 opened Sep 29, 2026Member·

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  9

• Per-call cache of non-constant replaceRegexpAll/replaceRegexpOne patterns

  comp-regular-functionpr-performance
  #122850·NIKTONIKTO717 opened Sep 29, 2026Member·

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  4

• ColumnLowCardinality::getPermutationImpl: counting sort by dictionary position

  comp-datatype-wrapperpr-performance
  #122849·NIKTONIKTO717 opened Sep 29, 2026Member·

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  3

• CompressionCodecMultiple keeps its sub-codecs across blocks

  comp-codecspr-performance
  #122848·NIKTONIKTO717 opened Sep 29, 2026Member·

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  4

  

• mapUniqueIndexImplRef in one pass

  comp-datatype-wrapperpr-performance
  #122847·NIKTONIKTO717 opened Sep 29, 2026Member·

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  4

• MergeTreeReaderWide derives the stream name once per readRows

  comp-mergetreepr-performance
  #122845·NIKTONIKTO717 opened Sep 29, 2026Member·

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  3

• ColumnIndex::insertIndex: check the index width with a shift

  comp-datatype-wrapperpr-not-for-changelogpr-performance
  #122844·NIKTONIKTO717 opened Sep 29, 2026Member·

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  4

  

• Align SYSTEM REFRESH VIEW while stopped/paused with streaming engines

  comp-refreshable-materialized-viewpr-autogenerated-docspr-bugfix
  #119217·NIKTONIKTO717 opened Sep 10, 2026Member·

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  1

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