strongduanmu commented on issue #22576: URL: https://github.com/apache/shardingsphere/issues/22576#issuecomment-1340841671
According to PostgreSQL document - https://www.postgresql.org/docs/current/queries-union.html, if we add order by segment in top level of sql, the results of set operations are not guaranteed to be ordered. > UNION effectively appends the result of query2 to the result of query1 (although there is no guarantee that this is the order in which the rows are actually returned). Furthermore, it eliminates duplicate rows from its result, in the same way as DISTINCT, unless UNION ALL is used. -- 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]
