Add readParquetFiles for partitioned parquet datasets #131
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mchav
reviewed
Jan 17, 2026
mchav
reviewed
Jan 17, 2026
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Kindly check if its alright |
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The function:
Accepts either a single Parquet file or a directory
Recursively discovers .parquet files when given a directory
Reads each file using the existing readParquet
Vertically merges the results using the existing DataFrame Semigroup / Monoid instance
The existing readParquet behavior is unchanged.
readParquetFiles is re-exported from DataFrame so it is available as D.readParquetFiles.
Performance considerations
The implementation relies on existing DataFrame merge semantics (mconcat) and performs a recursive filesystem traversal for file discovery. No changes were made to Parquet decoding or in-memory column handling.
Testing
Manually tested by reading a partitioned dataset stored as nested directories of Parquet files.
If there is something Which i am missing kindly mention and all suggestions are welcom.