Spark has already supported LZ4_RAW compression codec for parquet in Spark 3.5 with apache/spark#41507. Meanwhile, arrow-rs has also supported LZ4_RAW parquet compression codec in https://github.com/apache/arrow-rs/blob/main/parquet/src/compression.rs#L187C20-L187C27. Therefore, it's recommended to support LZ4_RAW compression codec for parquet.