kou commented on issue #13396: URL: https://github.com/apache/arrow/issues/13396#issuecomment-1162676527
Apache Parquet doesn't support "seconds" as unit: https://github.com/apache/parquet-format/blob/master/LogicalTypes.md#timestamp So "seconds" timestamp type is converted to "milliseconds" timestamp type when we write Apache Arrow data as Apache Parquet. We can cast type by the following: ```ruby s3_existing_table.merge( "History Completed Time" => Arrow::ChunkedArray.new(s3_existing_table["History Completed Time"].data.chunks.collect {|chunk| chunk.cast(Arrow::TimestampDataType.new(:second))}, "History Created Time" => Arrow::ChunkedArray.new(s3_existing_table["History Created Time"].data.chunks.collect {|chunk| chunk.cast(Arrow::TimestampDataType.new(:second))} ) ``` But this it too inconvenient... I'll add convenient APIs to write something like the following: ```ruby s3_existing_table.merge( "History Completed Time" => s3_existing_table["History Completed Time"].cast(unit: :second)), "History Created Time" => s3_existing_table["History Created Time"].cast(unit: :second)), ) ``` -- 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]
