David Johnston <polobo(at)yahoo(dot)com> writes:
> A bogus warning is nearly as bad as simply disallowing the syntax in the
> first place and I do not like turning one on unless there is the decision to
> disallow the syntax in the future.
TBH I do not see this happening. GET DIAGNOSTICS is just the tip of the
iceberg. The SQL standard uses "=" for assignment in other contexts,
most notably UPDATE, but also the SQL/PSM standard uses it in
<assignment statement> which is the exact same thing as in pl/pgsql.
So while purists might wish we only accepted :=, doing so would be
inconsistent with SQL.
I think we should just document it and move on.
regards, tom lane