Function append_json_value

sql/item_jsonfunc.cc:2094–2136

static int append_json_value(String *str, Item *item, String *tmp_val)
{
  if (item->type_handler()->is_bool_type())
  {
    longlong v_int= item->val_int();
    const char *t_f;
    int t_f_len;

    if (item->null_value)
      goto append_null;

    if (v_int)
    {
      t_f= "true";
      t_f_len= 4;
    }
    else
    {
      t_f= "false";
      t_f_len= 5;
    }

    return str->append(t_f, t_f_len);
  }
  {
    String *sv= item->val_json(tmp_val);
    if (item->null_value)
      goto append_null;
    if (is_json_type(item))
      return str->append(sv->ptr(), sv->length());

    if (item->result_type() == STRING_RESULT)
    {
      return str->append('"') ||
             st_append_escaped(str, sv) ||
             str->append('"');
    }
    return st_append_escaped(str, sv);
  }

append_null:
  return str->append(STRING_WITH_LEN("null"));
}


static int append_json_value_from_field(String *str,