zclllyybb commented on code in PR #23310:
URL: https://github.com/apache/doris/pull/23310#discussion_r1301623276
##########
be/src/vec/functions/function_json.cpp:
##########
@@ -1064,6 +1064,187 @@ class FunctionJsonContains : public IFunction {
}
};
+class FunctionJsonMergePatch : public IFunction {
+public:
+ static constexpr auto name = "json_merge_patch";
+ static FunctionPtr create() { return
std::make_shared<FunctionJsonMergePatch>(); }
+
+ String get_name() const override { return name; }
+
+ size_t get_number_of_arguments() const override { return 0; }
+
+ bool is_variadic() const override { return true; }
+
+ DataTypePtr get_return_type_impl(const DataTypes& arguments) const
override {
+ return make_nullable(std::make_shared<DataTypeString>());
Review Comment:
Does it need to be always_nullable? for not_nullable inputs, it seems will
not generate null value?
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