Re: BUG #13748: Syntax error not emitted

adam(dot)c(dot)scott(at)gmail(dot)com writes:
> create table administrators (pk integer, login_pk integer);
> create table logins (pk integer, name character varying(64));
> select * from administrators where login_pk in (select login_pk from
> logins);

> It should say something along the lines of:
> ERROR: column "login_pk" does not exist

Unfortunately not, because that's a perfectly SQL-standard outer reference
in a subquery.

Many people have adopted the habit of always table-qualifying column
references in subqueries to save themselves from this type of mistake.
That is, if you'd done something like

select * from administrators a where a.login_pk in
(select l.login_pk from logins l);

then you would indeed have gotten a complaint about l.login_pk not
being found in the expected table.

regards, tom lane