Parquet: skip reading constant column chunks via statistics - #2266

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UnamedRus wants to merge 14 commits into

antalya-26.6from

parquet-v3-constant-column-opt

Commits on Aug 26, 2026

Parquet v3: skip reading constant column chunks via statistics

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3b7ce77
Parquet v3: do not treat FLOAT/DOUBLE column chunks as constant

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486a3e3
Parquet v3: choose Const / Sparse / Nullable materialization from chunk statistics

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370e3ac
Expand sparse input columns in insertNullAsDefaultIfNeeded

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5f1c143
Materialize const and sparse columns where format output is accumulated with insertRangeFrom

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5682c69
Parquet v3: apply the constant-chunk shortcut only when no cast is involved

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e85505c

Commits on Aug 27, 2026

Parquet v3: size reads from the file layout instead of the seek threshold

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36783c7
Register the new Parquet read-path settings in SettingsChangesHistory

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1f6f96c
Stop naming the reader version in the new read-path setting descriptions

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e77bc3c
Trim the comments on the read-path change

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76ae223
Parquet: issue a subgroup's reads as one unit, and one subgroup ahead

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4a08161
Parquet: issue read-ahead from the previous subgroup's prefetch task instead of admitting the next subgroup early

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c0ffe68
Parquet: fix deadlock when PREWHERE drops every row of a subgroup

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062538f
Parquet: let metadata ranges coalesce with a row group's reads

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ca07675