Function compare_nested_object

sql/item_jsonfunc.cc:5135–5172

int compare_nested_object(json_engine_t *js, json_engine_t *value,
                          MEM_ROOT *current_mem_root,
                          json_engine_t *temp_je,
                          MEM_ROOT_DYNAMIC_ARRAY *stack)
{
  int result= 0;
  const char *value_begin= (const char*)value->s.c_str-1;
  const char *js_begin= (const char*)js->s.c_str-1;
  json_skip_level(value);
  json_skip_level(js);
  const char *value_end= (const char*)value->s.c_str;
  const char *js_end= (const char*)js->s.c_str;

  String a(value_begin, value_end-value_begin,value->s.cs);
  String b(js_begin, js_end-js_begin, js->s.cs);

  DYNAMIC_STRING a_res, b_res;
  if (init_dynamic_string(&a_res, NULL, BLOCK_SIZE_JSON_DYN_ARRAY, 1024) ||
      init_dynamic_string(&b_res, NULL, BLOCK_SIZE_JSON_DYN_ARRAY, 1024))
  { 
    goto error;
  }
  if (json_normalize(&a_res, a.ptr(), a.length(), value->s.cs,
                     current_mem_root, temp_je, stack) ||
      json_normalize(&b_res, b.ptr(), b.length(), value->s.cs,
                     current_mem_root, temp_je, stack))
  {
    goto error;
  }

  result= strcmp(a_res.str, b_res.str) ? 0 : 1;

  error:
  dynstr_free(&a_res);
  dynstr_free(&b_res);

  return MY_TEST(result);
}


static int json_find_overlap_with_object(json_engine_t *js, json_engine_t *value,