Re: testing nested case-when scoping

On Wed, Jun 15, 2011 at 7:43 AM, Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com> wrote:
> Hello Heikki,
>
> probably I found a bug in patch:
>
> CREATE FUNCTION fx(i integer) RETURNS integer
>    LANGUAGE plpgsql
>    AS $$begin raise notice '>>%<<', i; return i; end;$$;
>
> CREATE FUNCTION fx1(integer) RETURNS text
>    LANGUAGE sql
>    AS $_$ select case $1 when 1 then 'A' else 'B' end$_$;
>
> CREATE FUNCTION fx2(text) RETURNS text
>    LANGUAGE sql
>    AS $_$ select case $1 when 'A' then 'a' else 'b' end$_$;
>
> CREATE TABLE foo (
>    a integer
> );
>
> COPY foo (a) FROM stdin;
> 1
> 0
> \.
>
> postgres=# select fx2(fx1(fx(a))) from foo;
> NOTICE:  >>1<<
> ERROR:  invalid expression parameter reference (1 levels up, while
> stack is only 1 elements deep)

I can't reproduce this. Perhaps it was fixed by one of the later commits?

--
Robert Haas
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