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dataframe-parquet: Parquet reader and writer for the dataframe ecosystem.

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DataFrame.IO.Parquet — pure-Haskell Parquet 2.0 reader and writer (with snappy, zstd, gzip codecs, dictionary decoding, nested list/repeated columns, and predicate pushdown). Heavy package — pulls in pinch and compression codecs. Reading directly from HuggingFace (hf://) datasets lives in the separate dataframe-huggingface package. Most users want dataframe-csv instead unless they specifically need Parquet.

Modules

[Last Documentation]

  • DataFrame
    • IO
      • DataFrame.IO.Parquet
        • DataFrame.IO.Parquet.Binary
        • DataFrame.IO.Parquet.Decompress
        • DataFrame.IO.Parquet.Dictionary
        • DataFrame.IO.Parquet.Encoding
        • DataFrame.IO.Parquet.Levels
        • DataFrame.IO.Parquet.Page
        • DataFrame.IO.Parquet.Schema
        • DataFrame.IO.Parquet.Seeking
        • DataFrame.IO.Parquet.Thrift
        • DataFrame.IO.Parquet.Time
        • DataFrame.IO.Parquet.Utils
      • Utils
        • DataFrame.IO.Utils.RandomAccess
    • Typed
      • IO
        • DataFrame.Typed.IO.Parquet

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Versions [RSS] 1.0.0.0, 1.0.1.0, 1.0.1.1, 1.0.1.2, 1.1.0.0, 1.1.0.1, 1.2.0.0
Dependencies base (>=4 && <5), bytestring (>=0.11 && <0.14), containers (>=0.6.7 && <0.10), dataframe-core (>=2.0 && <2.1), dataframe-operations (>=2.0 && <2.1), dataframe-parsing (>=2.0 && <2.1), directory (>=1.3.0.0 && <2), filepath (>=1.4 && <2), Glob (>=0.10 && <1), pinch (>=0.5 && <1), snappy-hs (>=0.1 && <0.3), text (>=2.1 && <3), time (>=1.12 && <2), vector (>=0.13 && <0.15), zlib (>=0.5 && <1), zstd (>=0.1.2.0 && <0.3) [details]
Tested with ghc ==9.4.8 || ==9.6.7 || ==9.8.4 || ==9.10.3 || ==9.12.2
License MIT
Copyright (c) 2024-2026 Michael Chavinda
Author Michael Chavinda
Maintainer mschavinda@gmail.com
Uploaded by mchav at 2026-07-13T23:01:26Z
Category Data
Bug tracker https://github.com/mchav/dataframe/issues
Distributions Stackage:1.2.0.0
Reverse Dependencies 4 direct, 6 indirect [details]
Downloads 35 total (18 in the last 30 days)
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Status Docs not available [build log]
All reported builds failed as of 2026-07-14 [all 2 reports]