subotac opened a new pull request, #10569:
URL: https://github.com/apache/arrow-rs/pull/10569
# Which issue does this PR close?
Closes #10524.
# Rationale for this change
Parquet 1.0 writers silently ignored explicit dictionary settings for
`FIXED_LEN_BYTE_ARRAY` columns, even though dictionary encoding is valid for
the physical type.
# What changes are included in this PR?
Honor explicit global and per-column dictionary opt-ins for Parquet 1.0
FLBA columns while preserving the existing default-off behavior. Update CDC
expectations for FixedSizeBinary arrays when dictionary encoding is
explicitly enabled.
# Are these changes tested?
Yes. Added coverage for the default behavior, global opt-in, per-column
override, and explicit disable cases. The focused tests, full Parquet suite,
Clippy, and formatting checks pass.
# Are there any user-facing changes?
Callers can now explicitly enable dictionary encoding for Parquet 1.0 FLBA
columns. The default behavior is unchanged.
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