On 1/16/24 15:39, Ron Johnson wrote:
On Tue, Jan 16, 2024 at 5:31 PM Rob Sargent <robjsarg...@gmail.com> wrote:
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.
I'm not a Java web developer... 😁
You need to adjust you glasses if that's what you see me as.