array UNNESTed to rows stable with respect to order?

Hi all

I have created following statement to get the ordered parameter list of
functions. I use UNNEST to get rows from array. This works fine but I am
not sure whether the ordering remains in the later use. Background is
PL/pgSQL to revoke grants to get a pristine start for granting. As the
order of the parameter is important, I should use a statement that
returns the properly ordered list of parameters. Maybe I did take a
wrong turn and one can achieve this simpler.

Suggestions are very welcome.

Kind regards Thiemo

with PRO_UNNESTED_TYPES as(
select
oid as PROOID,
PRONAME,
unnest(PROARGTYPES) as PROARGTYPE,
PRONAMESPACE,
PROOWNER
from
PG_CATALOG.PG_PROC
) select
P.PRONAME,
string_agg(
T.TYPNAME,
', '
) as PARAMETER_LIST_STRING,
G.GRANTEE
from
PRO_UNNESTED_TYPES P
inner join PG_CATALOG.PG_TYPE T on
P.PROARGTYPE = T.OID
inner join PG_CATALOG.PG_NAMESPACE N on
P.PRONAMESPACE = N.OID
inner join INFORMATION_SCHEMA.ROUTINE_PRIVILEGES G on
-- copied from INFORMATION_SCHEMA.ROUTINE_PRIVILEGES source
-- as seen in DBeaver 4.3.2
(
(
P.PRONAME::text || '_'::text
)|| P.PROOID::text
)::INFORMATION_SCHEMA.SQL_IDENTIFIER = G.SPECIFIC_NAME
where
N.NSPNAME = current_user
and G.GRANTEE != current_user
group by
P.PROOID,
P.PRONAME,
G.GRANTEE
order by
P.PRONAME asc,
G.GRANTEE asc,
PARAMETER_LIST_STRING asc;

--
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