GitHub user uncleGen opened a pull request:
https://github.com/apache/spark/pull/16818
[SPARK-19451][SQL][Core] Underlying integer overflow in Window function
## What changes were proposed in this pull request?
reproduce code:
```
val tw = Window.orderBy("date")
.partitionBy("id")
.rangeBetween( from , 0)
```
Everything seems ok, while from value is not too large... Even if the
rangeBetween() method supports Long parameters.
But.... If i set -2160000000L value to from it does not work !
It seems like there is an underlying integer overflow issue here, i.e.
convert Long to Int:
```
private def between(typ: FrameType, start: Long, end: Long): WindowSpec = {
val boundaryStart = start match {
case 0 => CurrentRow
case Long.MinValue => UnboundedPreceding
case x if x < 0 => ValuePreceding(-start)
case x if x > 0 => ValueFollowing(start)
}
val boundaryEnd = end match {
case 0 => CurrentRow
case Long.MaxValue => UnboundedFollowing
case x if x < 0 => ValuePreceding(-end.toInt)
case x if x > 0 => ValueFollowing(end.toInt)
}
new WindowSpec(
partitionSpec,
orderSpec,
SpecifiedWindowFrame(typ, boundaryStart, boundaryEnd))
}
```
This pr changes the type of index from Int to Long.
BTW: Is there any reason why the type of index is Int? I do not find any
strong point to set like this.
## How was this patch tested?
existing ut
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/uncleGen/spark SPARK-19451
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/16818.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #16818
----
commit ea1f44026dc9f5b0f8e660b5adf8824b8deb94df
Author: uncleGen <[email protected]>
Date: 2017-02-06T01:36:29Z
change the type of index from Int to Long
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