2007/8/15, Merlin Moncure <mmoncure@gmail.com>:
> On 8/14/07, Bruce Momjian <bruce@momjian.us> wrote:
> >
> > TODO item?
>
> I would say yes...array_accum is virtually an essential function when
> working with arrays and the suggested array_to_set (and it's built in
> cousin, _pg_expand_array) really should not be built around
> generate_series when a C function is faster and will scale much
> better.
>
Hello Merlin
array_accum is good sample of PostgreSQL possibilities. But it is slow.
SELECT ARRAY(SELECT ... FROM ...)) is much faster. :(
so I unlike not necessary aggregate functions
I agree. These constructs can be showed in doc
Regards
Pavel Stehule