code: func SetPreparedPlanCache(isEnabled bool) {
  	if isEnabled {
  		atomic.StoreInt32(&preparedPlanCacheEnabledValue, preparedPlanCacheEnabled)
  	} else {
  		atomic.StoreInt32(&preparedPlanCacheEnabledValue, preparedPlanCacheUnable)
  	}
  }
docs: // SetPreparedPlanCache sets isEnabled to true, then prepared plan cache is enabled.