Re: How to count the number of items in an Array?

Andre Lopes <lopes80andre(at)gmail(dot)com> wrote:

> Hi,
>
> I have googled, but I can't find how to count the number of items in an Array
> in Plpgsql.
>
> Someone can give me a clue on that?

Sure, you can use array_upper() - array_lower():

Zeit: 0,205 ms
test=*# select array_upper(array[1,2,3],1) - array_lower(array[1,2,3],1);
?column?
----------
2
(1 Zeile)

or:

test=*# select array_upper(array[1,2,3],1) - array_lower(array[1,2,3],1) + 1;
?column?
----------
3
(1 Zeile)

Or, if your array starts with the first element, simple:

test=*# select array_upper(array[1,2,3,NULL,5],1);
array_upper
-------------
5
(1 Zeile)

Andreas
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