deniskuzZ commented on PR #6831: URL: https://github.com/apache/hive/pull/6831#issuecomment-5912855324
For Iceberg partitioned tables without a sort order, shouldDo() is what makes the input sorted: it sets `hasCustomPartitionOrSortExpression` → `setWriteOperationIsSorted` → HiveIcebergWriterBase picks the clustered writer. With this change, an INSERT/CTAS whose source has no column stats silently falls back to the fanout writer (one open writer per partition per task, tasks × partitions files) The reducer-skew problem is real, but can we address it without flipping the unknown-stats default, e.g. by keeping the sort while spreading a partition across reducers, or at least excluding storage-handler/non-native tables whose writers depend on sorted input? -- 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] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
