>
> From PostgreSQL's SQL perspective the session variables are common
> database objects (contra SQL/PL where package variables are SQL/PL language
> objects), and SQL disallows ambiguity. This is a little bit more complex
> problem, because session variables can be used everywhere in Postgres (not
> just in PL/pgSQL).
>
>
>
I though Oracle's PL/SQL, not SQL/PL