okumin commented on PR #5207: URL: https://github.com/apache/hive/pull/5207#issuecomment-2068524290
@ayushtkn Calcite can express the three statuses, either of "it is definitely unique", "it is not definitely unique", or unknown. Null stands for the last case. If it is null, this PR assumes a more general case, not unique. https://github.com/apache/calcite/blob/0551b8903391c1706422a2c1b8b648a6941f39a2/core/src/main/java/org/apache/calcite/rel/metadata/RelMetadataQuery.java#L523-L524 -- 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: gitbox-unsubscr...@hive.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: gitbox-unsubscr...@hive.apache.org For additional commands, e-mail: gitbox-h...@hive.apache.org
