WL#16046 - Support of JSON functions and aggregation with JSON types

I. This WL adds support for below functions
1. JSON_VALID
2. JSON_TYPE
3. JSON_PRETTY
4. JSON_QUOTE
5. JSON_OVERLAPS
6. JSON_STORAGE_SIZE
7. JSON_STROAGE_FREE
8. JSON_CONTAINS
9. JSON_CONTAINS_PATH
10. JSON_KEYS
11. JSON_MEMBER_OF
12. JSON_VALUE
13. JSON_SEARCH

This WL also adds group by and aggregation support with JSON types

Bug#36418296 Segmentation fault in rpdmqxra2_write_prepare_varlen
Bug#36424081 HeatWave does not return Invalid JSON text msg with
JSON_SEARCH query
Bug#36425131 Improve error message returned with invalid case of
JSON_STORAGE_SIZE
Bug#36454002 rpdserver crash in rpdmrtms_get_stats at rpdmrtms.c
Bug#36449578 mysqld crash in rpd::(anonymous namespace)::
NotSupportedType

Change-Id: I8fe8b301734d18592c01f210e1553955f0b8defc

Author: Amith Nagarajappa

sql-common/json_dom.cc

@@ -1880,7 +1880,6 @@ bool Json_wrapper::get_boolean() const {
   return m_value.type() == json_binary::Value::LITERAL_TRUE;
 }
 
-#ifdef MYSQL_SERVER
 Json_path Json_dom::get_location() const {
   if (m_parent == nullptr) {
     Json_path result(key_memory_JSON);
@@ -1908,7 +1907,6 @@ Json_path Json_dom::get_location() const {
   return result;
 }
 
-#endif  // ifdef MYSQL_SERVER
 bool Json_dom::seek(const Json_seekable_path &path, size_t legs,
                     Json_dom_vector *hits, bool auto_wrap, bool only_need_one) {
   const auto begin = path.begin();

sql/item_func.h

@@ -342,7 +342,16 @@ class Item_func : public Item_result_field {
     JSON_DEPTH_FUNC,
     JSON_EXTRACT_FUNC,
     JSON_OBJECT_FUNC,
-    JSON_ARRAY_FUNC
+    JSON_ARRAY_FUNC,
+    JSON_VALID_FUNC,
+    JSON_TYPE_FUNC,
+    JSON_PRETTY_FUNC,
+    JSON_QUOTE_FUNC,
+    JSON_CONTAINS_PATH_FUNC,
+    JSON_STORAGE_SIZE_FUNC,
+    JSON_STORAGE_FREE_FUNC,
+    JSON_VALUE_FUNC,
+    JSON_SEARCH_FUNC
   };
   enum optimize_type {
     OPTIMIZE_NONE,

sql/item_json_func.cc

@@ -4034,6 +4034,14 @@ enum Item_result Item_func_json_value::result_type() const {
   return json_cast_result_type(m_cast_target);
 }
 
+Json_on_response_type Item_func_json_value::on_empty_response_type() const {
+  return m_on_empty;
+}
+
+Json_on_response_type Item_func_json_value::on_error_response_type() const {
+  return m_on_error;
+}
+
 bool Item_func_json_value::resolve_type(THD *) {
   // The path must be a character literal, so it's never NULL.
   assert(!args[1]->is_nullable());

sql/item_json_func.h

@@ -323,6 +323,7 @@ class Item_func_json_valid final : public Item_int_func {
   Item_func_json_valid(const POS &pos, Item *a) : Item_int_func(pos, a) {}
 
   const char *func_name() const override { return "json_valid"; }
+  enum Functype functype() const override { return JSON_VALID_FUNC; }
 
   bool is_bool_func() const override { return true; }
 
@@ -442,6 +443,7 @@ class Item_func_json_contains_path final : public Item_int_func {
         m_path_cache(thd, arg_count) {}
 
   const char *func_name() const override { return "json_contains_path"; }
+  enum Functype functype() const override { return JSON_CONTAINS_PATH_FUNC; }
 
   bool is_bool_func() const override { return true; }
 
@@ -473,6 +475,7 @@ class Item_func_json_type : public Item_str_func {
   Item_func_json_type(const POS &pos, Item *a) : Item_str_func(pos, a) {}
 
   const char *func_name() const override { return "json_type"; }
+  enum Functype functype() const override { return JSON_TYPE_FUNC; }
 
   bool resolve_type(THD *) override;
 
@@ -788,6 +791,8 @@ class Item_func_json_search : public Item_json_func {
 
   const char *func_name() const override { return "json_search"; }
 
+  enum Functype functype() const override { return JSON_SEARCH_FUNC; }
+
   bool val_json(Json_wrapper *wr) override;
 
   /**
@@ -890,6 +895,8 @@ class Item_func_json_quote : public Item_str_func {
 
   const char *func_name() const override { return "json_quote"; }
 
+  enum Functype functype() const override { return JSON_QUOTE_FUNC; }
+
   bool resolve_type(THD *thd) override {
     if (reject_vector_args()) return true;
     if (param_type_is_default(thd, 0, -1)) return true;
@@ -944,6 +951,8 @@ class Item_func_json_pretty final : public Item_str_func {
 
   const char *func_name() const override { return "json_pretty"; }
 
+  enum Functype functype() const override { return JSON_PRETTY_FUNC; }
+
   bool resolve_type(THD *thd) override {
     if (reject_vector_args()) return true;
     if (param_type_is_default(thd, 0, -1, MYSQL_TYPE_JSON)) return true;
@@ -962,6 +971,7 @@ class Item_func_json_storage_size final : public Item_int_func {
   Item_func_json_storage_size(const POS &pos, Item *a)
       : Item_int_func(pos, a) {}
   const char *func_name() const override { return "json_storage_size"; }
+  enum Functype functype() const override { return JSON_STORAGE_SIZE_FUNC; }
 
   bool resolve_type(THD *thd) override {
     if (reject_vector_args()) return true;
@@ -982,6 +992,7 @@ class Item_func_json_storage_free final : public Item_int_func {
   Item_func_json_storage_free(const POS &pos, Item *a)
       : Item_int_func(pos, a) {}
   const char *func_name() const override { return "json_storage_free"; }
+  enum Functype functype() const override { return JSON_STORAGE_FREE_FUNC; }
 
   bool resolve_type(THD *thd) override {
     if (reject_vector_args()) return true;
@@ -1121,6 +1132,7 @@ class Item_func_json_value final : public Item_func {
                        Item *on_error_default);
   ~Item_func_json_value() override;
   const char *func_name() const override { return "json_value"; }
+  enum Functype functype() const override { return JSON_VALUE_FUNC; }
   enum Item_result result_type() const override;
   bool resolve_type(THD *) override;
   bool fix_fields(THD *thd, Item **ref) override;
@@ -1134,6 +1146,8 @@ class Item_func_json_value final : public Item_func {
   my_decimal *val_decimal(my_decimal *value) override;
   bool get_date(MYSQL_TIME *ltime, my_time_flags_t flags) override;
   bool get_time(MYSQL_TIME *ltime) override;
+  Json_on_response_type on_empty_response_type() const;
+  Json_on_response_type on_error_response_type() const;
 
  private:
   /// Represents a default value given in JSON_VALUE's DEFAULT xxx ON EMPTY or