public void Visiting(SqlSoundexFunction soundexFunction)
 {
     if (soundexFunction.SqlExpression != null)
     {
         sqlBuilder.Append("Soundex(");
         soundexFunction.SqlExpression.Accept(this);
         sqlBuilder.Append(")");
     }
     else
     {
         throw new NPersistException("Soundex must take a parameter");
     }
 }
 public void Visited(SqlSoundexFunction soundexFunction)
 {
 }