Re: length of array

Chris Faulkner wrote:
> I would like to do it like this in Oracle
>
> select field from table N where [conditions]
> and NVL(N.level[1],0) = 0
> and NVL(N.level[2],0) = 0
> and NVL(N.level[3],0) = 0
> and NVL(N.level[4],0) = 0
>
> So if a row only has two elements in the array, but the first two both had
> values "0", then the row would return. At the moment, I have this :
>
> and N.level[1] = 0
> and N.level[2] = 0
> and N.level[3] = 0
> and N.level[4] = 0
>
> but my row with 2 elements in the array won't be returned with this
> condition.

Is this what you're looking for?

regression=# select * from t1;
id | f1
----+-----------
1 | {1,2}
2 | {0,0,0}
3 | {0,0,0,0}
3 | {1,2,3,0}
(4 rows)

regression=# SELECT * FROM t1 WHERE COALESCE(f1[1],0) = 0 and
COALESCE(f1[2],0) = 0 and COALESCE(f1[3],0) = 0 and COALESCE(f1[4],0) = 0;
id | f1
----+-----------
2 | {0,0,0}
3 | {0,0,0,0}
(2 rows)

Joe