taptao commented on code in PR #22911:
URL: https://github.com/apache/doris/pull/22911#discussion_r1294521967
##########
regression-test/suites/query_p0/sql_functions/json_functions/test_json_function.groovy:
##########
@@ -83,4 +83,14 @@ suite("test_json_function") {
qt_sql "SELECT JSON_CONTAINS('{\"name\": \"John\", \"age\": 30,
\"projects\": [{\"name\": \"Project A\", \"year\": 2020}, {\"name\": \"Project
B\", \"year\": 2021}]}', '{\"projects\": [{\"name\": \"Project A\"}]}', '\$.');"
qt_sql "SELECT JSON_CONTAINS('{\"name\": \"John\", \"age\": 30,
\"address\": {\"city\": \"New York\", \"country\": \"USA\"}}', '{\"address\":
{\"city\": \"New York\"}}', '\$.');"
+ qt_sql "SELECT JSON_MERGE_PRESERVE('[]','[]');"
Review Comment:
done
##########
be/src/vec/functions/function_json.cpp:
##########
@@ -936,6 +937,186 @@ class FunctionJsonValid : public IFunction {
}
};
+class FunctionJsonMergePreserve : public IFunction {
+public:
+ static constexpr auto name = "json_merge_preserve";
+ static FunctionPtr create() { return
std::make_shared<FunctionJsonMergePreserve>(); }
+
+ 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>());
+ }
+
+ bool use_default_implementation_for_nulls() const override { return false;
}
+
+ rapidjson::Value* merge_list(std::vector<rapidjson::Value*> jsons,
+ rapidjson::Document::AllocatorType&
allocator) {
+ rapidjson::Value* result =
+
static_cast<rapidjson::Value*>(allocator.Malloc(sizeof(rapidjson::Value)));
+
+ (*result).SetArray();
+ for (auto json : jsons) {
+ if (json->IsArray()) {
+ for (auto itr = json->Begin(); itr != json->End(); itr++) {
+ rapidjson::Value* node = static_cast<rapidjson::Value*>(
+ allocator.Malloc(sizeof(rapidjson::Value)));
+ node->CopyFrom(*itr, allocator);
+ result->PushBack(*node, allocator);
+ }
+ } else {
+ rapidjson::Value* node =
+
static_cast<rapidjson::Value*>(allocator.Malloc(sizeof(rapidjson::Value)));
+ node->CopyFrom(*json, allocator);
+ result->PushBack(*node, allocator);
+ }
+ }
+ return result;
+ }
+
+ rapidjson::Value* merge_obejcts(std::vector<rapidjson::Value*> objs,
Review Comment:
done
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