Hi all, I asked a question in StackOverflow but seems here is the right place to reach. Link: https://stackoverflow.com/questions/46312522/is-it-possible-or-reasonable-for-a-parquet-file-to-have-multiple-compression-typ
After reading the thrift definition of metadata in Parquet ( https://github.com/apache/parquet-format#metadata), I found that there's a CompressionCodec field in each ColumnMetaData. Is it possible or reasonable for a Parquet file to have different compression types for different columns? If so, what's the scenario? How can I general such a file for test? ParquetWriter only accept a compression type in its constructor. If not, why not move the CompressionCodec field into the FileMetaData? For example, ORC uses a uniform compression for all columns and writes its compression type in Postscript (https://orc.apache.org/docs/file-tail.html). Thanks Quanlong
