deniskuzZ commented on code in PR #5191:
URL: https://github.com/apache/hive/pull/5191#discussion_r1568783021
##########
ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDFLower.java:
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@@ -108,4 +114,14 @@ public String getDisplayString(String[] children) {
return getStandardDisplayString("lower", children);
}
+ @Override
+ public StatEstimator getStatEstimator() {
+ return new StatEstimator() {
+ @Override
+ public Optional<ColStatistics> estimate(List<ColStatistics> argStats) {
+ return Optional.of(argStats.get(0).clone());
Review Comment:
could it be an empty list?
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