RussellSpitzer commented on code in PR #12580: URL: https://github.com/apache/iceberg/pull/12580#discussion_r2013002983
########## format/spec.md: ########## @@ -408,16 +406,17 @@ When `null`, a row's `_row_id` field is assigned to the `first_row_id` from its Values for `_row_id` and `_last_updated_sequence_number` are either read from the data file or assigned at read time. As a result on read, rows in a table always have non-null values for these fields when lineage is enabled. -When an existing row is moved to a different data file for any reason, writers are required to write `_row_id` and `_last_updated_sequence_number` according to the following rules: +When an existing row is moved to a different data file for any reason, writers should write `_row_id` and `_last_updated_sequence_number` according to the following rules: 1. The row's existing non-null `_row_id` must be copied into the new data file 2. If the write has modified the row, the `_last_updated_sequence_number` field must be set to `null` (so that the modification's sequence number replaces the current value) 3. If the write has not modified the row, the existing non-null `_last_updated_sequence_number` value must be copied to the new data file +Engines may model operations as deleting all rows and adding new rows as row updates that preserves row ids. Review Comment: ```suggestion Engines may model operations as deleting all rows and adding new rows or as row updates that preserves row ids. ``` -- 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: issues-unsubscr...@iceberg.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@iceberg.apache.org For additional commands, e-mail: issues-h...@iceberg.apache.org
