HappenLee commented on code in PR #13440:
URL: https://github.com/apache/doris/pull/13440#discussion_r1000451353
##########
be/src/vec/functions/array/function_array_difference.h:
##########
@@ -67,8 +67,12 @@ class FunctionArrayDifference : public IFunction {
} else if (which.is_decimal()) {
return arguments[0];
}
- return std::make_shared<DataTypeArray>(is_nullable ?
make_nullable(return_type)
- : return_type);
+ if (return_type) {
+ return std::make_shared<DataTypeArray>(is_nullable ?
make_nullable(return_type)
+ : return_type);
+ } else {
+ return nullptr;
Review Comment:
maybe need DCHECK or LOG_FATAL
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