okumin commented on a change in pull request #2551:
URL: https://github.com/apache/hive/pull/2551#discussion_r680135993
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File path: ql/src/java/org/apache/hadoop/hive/ql/exec/HiveStructComparator.java
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@@ -45,16 +48,14 @@ public int compare(Object key1, Object key2) {
if (a1.size() == 0) {
return 0;
}
- if (comparator == null) {
Review comment:
The root cause is that the num of comparators is fixed to the size of
the first List. This will work for STRUCT since the number of elements is
consistent across records. However, in the case of ARRAY, it varies.
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