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