Hi, You can find information of type mappings here: https://iceberg.apache.org/spec/#parquet
1. Iceberg timestamps have microseconds precision. In Parquet they are stored as INT64s with TIMESTAMP_MICROS annotation. 2. Iceberg limits decimal precision to 38: https://iceberg.apache.org/spec/#primitive-types Doing anything non-standard (using different Parquet types to store timestamps, having decimals with precision > 38) is not guaranteed to work. It might work with one implementation while not working with other implementations. E.g. Impala also limits decimal precision to 38. Cheers, Zoltan On Thu, Aug 26, 2021 at 10:24 PM Star P <star.anis...@gmail.com> wrote: > Hello Iceberg devs! > > I was looking through the Parquet Logical types > <https://github.com/apache/parquet-format/blob/master/LogicalTypes.md>and > Iceberg data types and I have a couple of questions. > > 1. Parquet allows storing nano second precision data. If I convert an > existing Parquet file with nanosecond precision data to Iceberg, what will > be the data type of the column in Iceberg? > 2. Parquet allows decimals of arbitrary precision, so a parquet file may > have a FLBA of length > 16 representing a decimal. How is this handled in > Iceberg? > > Thanks! >
