pvary commented on PR #18517: URL: https://github.com/apache/iceberg/pull/18517#issuecomment-6219204747
Here are the use-cases I seee: - When writing the old field is useful: the column is dropped and not re-added. Late records with the old shape still match the older schema, which testOptInDropUnusedColumns relies on. The filter keeps this, because it only skips a historical schema when a dropped field's name is in use again under a new id. - When the name is live again: writing the retired id is never readable through the current schema. The column exists and the record has a value, but readers see null. So I think we can safely omit schemas where the field is readded with the same name. Do you see any use-cases which I miss? -- 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]
