Xuanwo commented on code in PR #23830: URL: https://github.com/apache/datafusion/pull/23830#discussion_r3943225380
########## docs/source/user-guide/sql/select.md: ########## @@ -400,6 +401,45 @@ SELECT * FROM x LEFT JOIN x AS y ON x.column_1 = y.column_2; +----------+----------+----------+----------+ ``` +### ASOF JOIN + +An `ASOF JOIN` matches each left row with at most one right row according to an +ordered comparison. It preserves every left row and fills the right columns +with `NULL` when no right row matches. Review Comment: Added. -- 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]
