/**
* {@inheritdoc}
*/
public function fields($table_alias, array $fields = array())
{
if (!$fields) {
$table = $this->tables[$table_alias]['table'];
if (!empty($this->databaseContents[$table])) {
$fields = array_keys(reset($this->databaseContents[$table]));
} else {
throw new \Exception(SafeMarkup::format('All fields on empty table @table is not supported.', array('@table' => $table)));
}
}
return parent::fields($table_alias, $fields);
}
