On Friday, October 29, 2021, PG Bug reporting form <noreply(at)postgresql(dot)org>
wrote:
> The following bug has been logged on the website:
>
> Bug reference: 17258
> Logged by: David Calascibetta
> Email address: david(at)calascibetta(dot)com
> PostgreSQL version: 12.8
> Operating system: AWS RDS
> Description:
>
> My understanding is that a CHAR(1) column can never be 0 (zero) length.
https://wiki.postgresql.org/wiki/Don%27t_Do_This#Don.27t_use_char.28n.29
David J.