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Jörn Horstmann authored and Wes McKinney committed 49d16afbddf
ARROW-8231: [Rust] Parse parquet key_value_metadata The parquet-format FileMetaData struct contains optional key value pairs with additional metadata about the schema. When the parquet file was generated using the java avro parquet writer, this for example contains the original avro schema under the `parquet.avro.schema` or `avro.schema` keys. Please note that I'm still relatively new to rust, any feedback is appreciated. Closes #6742 from jhorstmann/ARROW-8231-parse-parquet-key-value-metadata Lead-authored-by: Jörn Horstmann <joern.horstmann@signavio.com> Co-authored-by: Jörn Horstmann <git@jhorstmann.net> Signed-off-by: Wes McKinney <wesm+git@apache.org>