Re: general purpose array_sort

tricky case:
should we allow array element type to be composite/domain?
currently seems to work fine.


create table t(b int[]);
insert into t values ('{{1,3}}'), ('{{1,2}}');

 select array_sort((select array_agg(t) from t), 'desc');
            array_sort
-----------------------------------
 {"(\"{{1,3}}\")","(\"{{1,2}}\")"}


select array_sort((t.b)) from t;
ERROR:  multidimensional arrays sorting are not supported


select array_sort((select array_agg(t.b) from t));
ERROR:  multidimensional arrays sorting are not supported