zhiqiang-hhhh commented on code in PR #38608:
URL: https://github.com/apache/doris/pull/38608#discussion_r1698549772


##########
be/src/vec/aggregate_functions/aggregate_function_histogram.h:
##########
@@ -86,7 +92,9 @@ struct AggregateFunctionHistogramData {
     }
 
     void merge(const AggregateFunctionHistogramData& rhs) {
-        if (!rhs.max_num_buckets) {
+        // if rhs.max_num_buckets == 1, it means the input block for 
serialization is all null

Review Comment:
   yes, i will fix



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