Github user thunterdb commented on a diff in the pull request:
https://github.com/apache/spark/pull/14976#discussion_r77734419
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/QuantileSummaries.scala
---
@@ -59,9 +59,14 @@ class QuantileSummaries(
* @param x the new observation to insert into the summary
*/
def insert(x: Double): QuantileSummaries = {
- headSampled.append(x)
+ headSampled += x
if (headSampled.size >= defaultHeadSize) {
- this.withHeadBufferInserted
+ val result = this.withHeadBufferInserted
+ if (result.sampled.length >= compressThreshold) {
+ result.compress()
--- End diff --
Yes, this is the fix, thanks for doing it. I had never realized that
`.append` takes a vararg input, thanks for the hint.
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