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From: Tom Lane <tgl@sss.pgh.pa.us>
To: "Salavessa, Joao (Senior Developer)" <Joao.Salavessa@sky.uk>
cc: "pgsql-bugs@lists.postgresql.org" <pgsql-bugs@lists.postgresql.org>
Subject: Re: PostgreSQL 14.7 "ALTER TABLE IF EXISTS" fails - ERROR:
 schema/relation "<name>" does not exist
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Comments: In-reply-to "Salavessa,
 Joao (Senior Developer)" <Joao.Salavessa@sky.uk>
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"Salavessa, Joao (Senior Developer)" <Joao.Salavessa@sky.uk> writes:
> In PostgreSQL 14.7 (AWS RDS) the =E2=80=9CIF EXISTS=E2=80=9D seems to be=
 ignored for the =E2=80=9CALTER TABLE=E2=80=9D statement.
> Example =E2=80=93 the query =E2=80=9CALTER TABLE IF EXISTS dummy.relatio=
n DROP CONSTRAINT IF EXISTS dummy=E2=80=9D (when schema dummy doesn=E2=80=99=
t exist, or when schema dummy exists but relation doesn=E2=80=99t) works o=
n 14.6 but fails in 14.7.
> Few outputs below:

> ALTER TABLE IF EXISTS dummy.relation DROP CONSTRAINT IF EXISTS dummy  --=
 running in PostgreSQL 14.6
> NOTICE:  relation "relation" does not exist, skipping
> OK

It still works like that for me in 14.latest.  Perhaps you installed an
event trigger that is doing something incautious?

			regards, tom lane