From: Reynold Xin [r...@databricks.com]
Sent: Monday, September 14, 2015 10:14 PM
To: Zack Sampson
Cc: dev@spark.apache.org
Subject: Re: And.eval short circuiting
rxin=# select null and true;
?column?
--
(1 row)
rxin=# select null and false;
?column?
--
f
(1 row)
null
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) {
.
Are there methods we can use to convert to/from the internal representation in
these cases?
From: Michael Armbrust [mich...@databricks.com]
Sent: Thursday, June 11, 2015 9:05 PM
To: Zack Sampson
Cc: dev@spark.apache.org
Subject: Re: When to expect
