eldenmoon commented on code in PR #40697:
URL: https://github.com/apache/doris/pull/40697#discussion_r1754468445


##########
be/src/vec/aggregate_functions/aggregate_function_collect.cpp:
##########
@@ -69,15 +72,21 @@ AggregateFunctionPtr 
create_aggregate_function_collect_impl(const std::string& n
     if (which.is_date_or_datetime()) {
         return do_create_agg_function_collect<Int64, HasLimit, 
ShowNull>(distinct, argument_types,
                                                                          
result_is_nullable);
-    } else if (which.is_date_v2()) {
+    } else if (which.is_date_v2() || which.is_ipv4()) {
         return do_create_agg_function_collect<UInt32, HasLimit, 
ShowNull>(distinct, argument_types,
                                                                           
result_is_nullable);
-    } else if (which.is_date_time_v2()) {
+    } else if (which.is_date_time_v2() || which.is_ipv6()) {
         return do_create_agg_function_collect<UInt64, HasLimit, 
ShowNull>(distinct, argument_types,
                                                                           
result_is_nullable);
     } else if (which.is_string()) {
         return do_create_agg_function_collect<StringRef, HasLimit, ShowNull>(
                 distinct, argument_types, result_is_nullable);
+    } else {
+        // generic serialize which will not use specializations, 
ShowNull::value always means array_agg
+        if constexpr (ShowNull::value) {
+            return do_create_agg_function_collect<void, HasLimit, ShowNull>(
+                    distinct, argument_types, result_is_nullable);
+        }
     }
 
     LOG(WARNING) << fmt::format("unsupported input type {} for aggregate 
function {}",

Review Comment:
   unreachable code? remove



##########
be/src/vec/aggregate_functions/aggregate_function_collect.cpp:
##########
@@ -69,15 +72,21 @@ AggregateFunctionPtr 
create_aggregate_function_collect_impl(const std::string& n
     if (which.is_date_or_datetime()) {
         return do_create_agg_function_collect<Int64, HasLimit, 
ShowNull>(distinct, argument_types,
                                                                          
result_is_nullable);
-    } else if (which.is_date_v2()) {
+    } else if (which.is_date_v2() || which.is_ipv4()) {
         return do_create_agg_function_collect<UInt32, HasLimit, 
ShowNull>(distinct, argument_types,
                                                                           
result_is_nullable);
-    } else if (which.is_date_time_v2()) {
+    } else if (which.is_date_time_v2() || which.is_ipv6()) {
         return do_create_agg_function_collect<UInt64, HasLimit, 
ShowNull>(distinct, argument_types,
                                                                           
result_is_nullable);
     } else if (which.is_string()) {
         return do_create_agg_function_collect<StringRef, HasLimit, ShowNull>(
                 distinct, argument_types, result_is_nullable);
+    } else {
+        // generic serialize which will not use specializations, 
ShowNull::value always means array_agg
+        if constexpr (ShowNull::value) {
+            return do_create_agg_function_collect<void, HasLimit, ShowNull>(
+                    distinct, argument_types, result_is_nullable);
+        }
     }
 
     LOG(WARNING) << fmt::format("unsupported input type {} for aggregate 
function {}",

Review Comment:
   unreachable code? remove



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