Re: How to count the number of items in an Array? - Mailing list pgsql-general

Andre Lopes <lopes80andre@gmail.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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