lsyldliu commented on PR #20442: URL: https://github.com/apache/flink/pull/20442#issuecomment-1207750079
> I just have one question that does this PR only supports ARRAY, MAP, ROW with primitive types? Does parquet support nested types in array, map, row? 1. For the first question, yes for array and map, row can nested with map and array. 2. For the second question, it seems that parquet support nested types in nested type, refer to https://parquet.apache.org/docs/file-format/nestedencoding/ After investigate [hive](https://github.com/apache/hive/blob/27dd6fdc89b10c8813c02310291b09565f0d4959/ql/src/java/org/apache/hadoop/hive/ql/io/parquet/vector/VectorizedListColumnReader.java#L38) and [spark](https://github.com/apache/spark/blob/35d00df9bba7238ad4f409999617fae4d04ddbfd/sql/core/src/main/java/org/apache/spark/sql/execution/datasources/parquet/ParquetColumnVector.java#L260) implementation, I found hive doesn't support array with nested types currently, but spark support. So I think we should assign with spark in next version. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
