Обсуждение: selecting from integer[]

select * from pg_user where usesysid=(select grolist[1] from pg_group 
where groname='mygroup');
select * from pg_user where usesysid=(select grolist[2] from pg_group 
where groname='mygroup');
select * from pg_user where usesysid=(select grolist[3] from pg_group 
where groname='mygroup');

Can those three queries be merged to one query? (and still gives me 
those three rows)
Or do I have to explicitly say grolist[1], grolist[2], etc....

Thanks in advance :)

Well, you can always just UNION them - I don't know if there's a better
way tho.

select * from ...
union [all]
select * from ...
union [all]
select * from ...;

Chris


On Sat, 29 Jun 2002, Kelly wrote:

>
> select * from pg_user where usesysid=(select grolist[1] from pg_group
> where groname='mygroup');
> select * from pg_user where usesysid=(select grolist[2] from pg_group
> where groname='mygroup');
> select * from pg_user where usesysid=(select grolist[3] from pg_group
> where groname='mygroup');
>
> Can those three queries be merged to one query? (and still gives me
> those three rows)
> Or do I have to explicitly say grolist[1], grolist[2], etc....
>
> Thanks in advance :)
>
>
>
>
> ---------------------------(end of broadcast)---------------------------
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>
> http://archives.postgresql.org
>
>

On Sat, 29 Jun 2002, Kelly wrote:

> select * from pg_user where usesysid=(select grolist[1] from pg_group
> where groname='mygroup');
> select * from pg_user where usesysid=(select grolist[2] from pg_group
> where groname='mygroup');
> select * from pg_user where usesysid=(select grolist[3] from pg_group
> where groname='mygroup');
>
> Can those three queries be merged to one query? (and still gives me
> those three rows)
> Or do I have to explicitly say grolist[1], grolist[2], etc....

If you want to do "is element in array," I believe the array iterator
functions in contrib/array might help you.