/**
  * Remove shadow db name for creating index names
  *
  * Retrieve valid index name
  * Check index name length and allowed symbols
  *
  * @param string       $tableName
  * @param string|array $fields the columns list
  * @param string       $indexType
  *
  * @return string
  */
 public function getIndexName($tableName, $fields, $indexType = '')
 {
     return parent::getIndexName($this->_removeShadowDbName($tableName), $fields, $indexType);
 }