Create table to get the valid rowtype under single user mode

When Who What
2020-07-07 19:44:23 Tom Lane (tgl) Closed in commitfest 2020-07 with status: Committed
2020-07-06 18:10:00 Tom Lane (tgl) Added tgl as committer
2020-05-21 08:10:12 Shawn Wang (shawnwang) Posted review with messageid <159004861258.12248.14735797678373593508.pgcf@coridan.postgresql.org>
2020-05-21 08:08:09 Shawn Wang (shawnwang) New status: Ready for Committer
2020-05-21 08:07:07 Shawn Wang (shawnwang) Added shawnwang as reviewer
2020-05-21 08:05:12 Wenjing Zeng (wenjing.zwj) Changed authors to wenjing zeng (wenjing.zwj)
2020-05-21 08:05:12 Wenjing Zeng (wenjing.zwj) Changed targetversion to 14
2020-05-21 08:03:47 Wenjing Zeng (wenjing.zwj) Attached mail thread 761F1389-C6A8-4C15-80CE-950C961F5341@gmail.com
2020-05-21 08:03:46 Wenjing Zeng (wenjing.zwj) Created patch record