From: | "Merlin Moncure" <mmoncure(at)gmail(dot)com> |
---|---|
To: | "Pavel Stehule" <pavel(dot)stehule(at)gmail(dot)com> |
Cc: | PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: Proposal: generate_iterator functions |
Date: | 2007-10-18 12:02:12 |
Message-ID: | b42b73150710180502h4e9582f6y61cab48671e212b9@mail.gmail.com |
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Lists: | pgsql-hackers |
On 10/18/07, Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com> wrote:
> this function can help with array's iteration.
>
> create function generate_iterator(anyarray)
> returns setof integer
> as $$
> select i
> from generate_series(array_lower($1,1),
> array_upper($1,1)) g(i)
> $$ language sql;
There was a very similar proposal a little while back (google:
array_to_set). I think I like those names better since you are
returning a set, not an iterator :-). Also, this should be internal
as you suggest (there is an undocumented builtin that already does
this, _pg_expandarray).
merlin
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