Details
Major Description
Parquet format PR #17 standardized structures of Parquet complex types (LIST & MAP). Spark SQL should follow this spec and write Parquet data conforming to the standard.
Note that although currently Parquet files written by Spark SQL is non-standard (because Parquet format spec wasn't clear about this part when Spark SQL Parquet support was authored), it's still compatible with the most recent Parquet format spec, because the format we use is covered by the backwards-compatibility rules.
