etseidl opened a new pull request, #6068:
URL: https://github.com/apache/arrow-rs/pull/6068
# Which issue does this PR close?
Related to #5022
# Rationale for this change
First step in adding new statistics defined in
[PARQUET-2261](https://github.com/apache/parquet-format/pull/197).
# What changes are included in this PR?
This PR makes modifications to collect the unencoded sizes of `BYTE_ARRAY`
columns. Adds a new `OffsetSizeIndex` structure to represent the Thrift
`OffsetIndex` struct, which comprises and array of `PageLocation`s and an
optional array of `unencoded_byte_array_data_bytes`. This also adds
`unencoded_byte_array_data_bytes` to the `ParquetMetaData` struct (as a
precursor to redefining `ParquetOffsetIndex` in terms of `OffsetSizeIndex`).
# Are there any user-facing changes?
Yes.
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