Re: Mimic ALIAS in Postgresql?

On 1/16/24 10:20, Ron Johnson wrote:
> Some RDBMSs have CREATE ALIAS, which allows you to refer to a table by
> a different name (while also referring to it by the original name).
>
> We have an application running on DB2/UDB which (for reasons wholly
> unknown to me, and probably also to the current developer) extensively
> uses this with two schemas: MTUSER and MTQRY.  For example, sometimes
> refer to MTUSER.sometable and other times refer to it as MYQRY.sometable.
>
> My goal is to present a way to migrate from UDB to PG with as few
> application changes as possible.  Thus, the need to mimic aliases.
>
> Maybe updatable views?
> CREATE VIEW mtqry.sometable AS SELECT * FROM mtuser.sometable;
>
Isn't it time to get rid of that debt?  A sed -i 's/MTUSER/MTQRY/g' (or
vice versa) ends what looks to me to be a split brain problem.  All the
sql is in git right? :)

Or perhaps you have to beef the sed up to use word boundaries just in case.