Method set_value

sql/sql_acl.cc:1799–1848

    return true;
  }
  enum json_types set_value(const char *key,
                            const char *val, size_t vlen, bool string) const
  {
    int value_len;
    const char *value_start;
    enum json_types value_type;
    json_engine_t temp_je;
    MEM_ROOT current_mem_root;

    init_alloc_root(PSI_INSTRUMENT_MEM, &current_mem_root,
                    BLOCK_SIZE_JSON_DYN_ARRAY, 0, MYF(0));

    mem_root_dynamic_array_init(&current_mem_root, PSI_INSTRUMENT_MEM,
                                &temp_je.stack,
                                sizeof(int), NULL,
                                JSON_DEPTH_DEFAULT, JSON_DEPTH_INC, MYF(0));

    String str, *res= m_table->field[2]->val_str(&str);
    if (!res || !res->length())
      (res= &str)->set(STRING_WITH_LEN("{}"), m_table->field[2]->charset());
    value_type= json_get_object_key(res->ptr(), res->end(), key,
                                    &value_start, &value_len);
    if (value_type == JSV_BAD_JSON)
    {
      free_root(&current_mem_root, MYF(0));
      return value_type; // invalid
    }
    StringBuffer<JSON_SIZE> json(res->charset());
    json.copy(res->ptr(), value_start - res->ptr(), res->charset());
    if (value_type == JSV_NOTHING)
    {
      if (value_len)
        json.append(',');
      json.append('"');
      json.append(key, strlen(key));
      json.append(STRING_WITH_LEN("\":"));
      if (string)
        json.append('"');
    }
    else
      value_start+= value_len;
    json.append(val, vlen);
    if (!value_type && string)
      json.append('"');
    json.append(value_start, res->end() - value_start);
    DBUG_ASSERT((json_valid(json.ptr(), json.length(), json.charset(), &temp_je)));
    m_table->field[2]->store(json.ptr(), json.length(), json.charset());
    free_root(&current_mem_root, MYF(0));
    return value_type;
  }
  bool set_str_value(const char *key, const char *val, size_t vlen) const
  {
    char buf[JSON_SIZE];