ttencate opened a new pull request, #6271:
URL: https://github.com/apache/arrow-rs/pull/6271
The compression level is only used during compression, not decompression,
and isn't actually stored in the metadata. Printing it is misleading.
# Which issue does this PR close?
Closes #6270.
# Rationale for this change
Theoretically, there should be a `Compression` enum that doesn't store the
level, but that doesn't seem worth the trouble and API breakage.
Instead, I just added a method `codec_to_string()` that returns the `Debug`
output up to the first `(`. This is easier to maintain and hopefully less
error-prone than adding a `match`. It's less efficient, but efficiency doesn't
matter much here.
# Are there any user-facing changes?
No. The output of `print_parquet_metadata` is neither documented nor tested,
and should therefore not be considered stable.
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