// Called for new resultset starting (COLMETADATA token)
 internal override void MetaDataAvailable(SmiQueryMetaData[] metaData, bool nextEventIsRow)
 {
     if (null == _parent)
     {
         throw SQL.UnexpectedSmiEvent(UnexpectedEventType.MetaDataAvailable);
     }
     _parent.MetaDataAvailable(metaData, nextEventIsRow);
 }