Preserve query as Parquet file-level metadata - #2228
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Since the Parquet file format supports file-level metadata, when saving a Parquet with .>, we can preserve the originating query in the file. The .> operator and target filename are preserved in the query, which might be debatable. The Polars documentation also warns that the metadata interface is experimental, but our tests should catch any issues on a dependency upgrade.
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Description
Since the Parquet file format supports file-level metadata, when saving a Parquet with
.>, we can preserve the originating query in the file.The
.>operator and target filename are preserved in the query, which might be debatable.The Polars documentation also warns that the metadata interface is experimental, but our tests should catch any issues on a dependency upgrade.
Example of viewing the file-level metadata in the produced Parquet using the tool parqeye:
Checklist
changelog.mdfile.AUTHORSfile (or it's already there).