yaooqinn commented on a change in pull request #28764:
URL: https://github.com/apache/spark/pull/28764#discussion_r437826188
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/mathExpressions.scala
##########
@@ -1325,3 +1325,94 @@ case class BRound(child: Expression, scale: Expression)
with Serializable with ImplicitCastInputTypes {
def this(child: Expression) = this(child, Literal(0))
}
+
+object WidthBucket {
+
+ def computeBucketNumber(value: Double, min: Double, max: Double, numBucket:
Long): jl.Long = {
+ // Checks error cases below:
+ // - `numBucket` must be greater than zero and be less than Long.MaxValue
+ // - `value`, `min`, and `max` cannot be NaN
+ // - `min` bound cannot equal `max
+ // - `min` and `max` must be finite
+ if (numBucket <= 0 || numBucket == Long.MaxValue || jl.Double.isNaN(value)
|| min == max ||
+ jl.Double.isNaN(min) || jl.Double.isInfinite(min) ||
+ jl.Double.isNaN(max) || jl.Double.isInfinite(max)) {
+ return null
+ }
+
+ val lower = Math.min(min, max)
+ val upper = Math.max(min, max)
+
+ if (min < max) {
+ if (value < lower) {
+ 0L
+ } else if (value >= upper) {
+ numBucket + 1L
+ } else {
+ (numBucket.toDouble * (value - lower) / (upper - lower)).toLong + 1L
+ }
+ } else { // `min > max` case
Review comment:
Does this follow PostgreSQL too?
----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:
[email protected]
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
