morrySnow commented on code in PR #26014:
URL: https://github.com/apache/doris/pull/26014#discussion_r1374143882
##########
fe/fe-core/src/main/java/org/apache/doris/catalog/AggregateFunction.java:
##########
@@ -58,7 +58,8 @@ public class AggregateFunction extends Function {
FunctionSet.ARRAY_AGG, FunctionSet.COLLECT_LIST,
FunctionSet.COLLECT_SET);
public static ImmutableSet<String>
ALWAYS_NULLABLE_AGGREGATE_FUNCTION_NAME_SET =
- ImmutableSet.of("stddev_samp", "variance_samp", "var_samp",
"percentile_approx");
+ ImmutableSet.of("stddev_samp", "variance_samp", "var_samp",
"percentile_approx", "first_value",
+ "last_value");
Review Comment:
lag, min, max, avg, sum in window function also should be always nullable
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