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.

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