rxin=# select null and true;
?column?
----------
(1 row)
rxin=# select null and false;
?column?
----------
f
(1 row)
null and false should return false.
On Mon, Sep 14, 2015 at 9:12 PM, Zack Sampson <zsamp...@palantir.com> wrote:
> It seems like And.eval can avoid calculating right.eval if left.eval
> returns null. Is there a reason it's written like it is?
>
> override def eval(input: Row): Any = {
> val l = left.eval(input)
> if (l == false) {
> false
> } else {
> val r = right.eval(input)
> if (r == false) {
> false
> } else {
> if (l != null && r != null) {
> true
> } else {
> null
> }
> }
> }
> }
>
>
