HappenLee commented on code in PR #57204:
URL: https://github.com/apache/doris/pull/57204#discussion_r2533324776
##########
be/src/vec/functions/function.cpp:
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@@ -279,6 +279,9 @@ DataTypePtr FunctionBuilderImpl::get_return_type(const
ColumnsWithTypeAndName& a
create_block_with_nested_columns(Block(arguments),
numbers, false);
auto return_type = get_return_type_impl(
ColumnsWithTypeAndName(nested_block.begin(),
nested_block.end()));
+ if (!return_type) {
Review Comment:
what case the return type is nullptr ?
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