Thanks for the feedback. The error is something like column already exists and Quoting issue is Unlikely, and as I mentioned it works as expected if Im repeating the patch in 11.3 And I assume would if I was in 9.6. I suspect it has something to do with the content, or lack of, in the pg_attribute table following an upgrade. -----Original Message----- From: Luca Ferrari [mailto:fluca1978@xxxxxxxxx] Sent: Tuesday, August 20, 2019 3:41 PM To: Day, David <david.day@xxxxxxxxxx> Cc: pgsql-general@xxxxxxxxxxxxxx Subject: Re: Rename a column if not already renamed.? On Tue, Aug 20, 2019 at 9:07 PM Day, David <david.day@xxxxxxxxxx> wrote: > EXECUTE format ('ALTER TABLE %s RENAME %s TO %s', schema_table_, > old_name_, new_name); Hard to say without the error, but any chance there is a quoting problem? EXECUTE format ('ALTER TABLE %s RENAME %I TO %I', schema_table_, old_name_, new_name); Luca