Github user j-baker commented on a diff in the pull request:
https://github.com/apache/spark/pull/18543#discussion_r128186925
--- Diff:
sql/catalyst/src/main/java/org/apache/spark/sql/execution/UnsafeExternalRowSorter.java
---
@@ -211,7 +211,10 @@ public int compare(Object baseObj1, long baseOff1,
Object baseObj2, long baseOff
// TODO: Why are the sizes -1?
row1.pointTo(baseObj1, baseOff1, -1);
row2.pointTo(baseObj2, baseOff2, -1);
- return ordering.compare(row1, row2);
+ int comparison = ordering.compare(row1, row2);
+ row1.pointTo(null, 0L, -1);
+ row2.pointTo(null, 0L, -1);
--- End diff --
maybe it's worth having a clone method on the comparator and making sure we
clone the comparator before passing it to anything?
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