public override string ToString()
{
StringBuilder sb = new StringBuilder("alter_index_args(");
sb.Append("Dbname: ");
sb.Append(Dbname);
sb.Append(",Base_tbl_name: ");
sb.Append(Base_tbl_name);
sb.Append(",Idx_name: ");
sb.Append(Idx_name);
sb.Append(",New_idx: ");
sb.Append(New_idx == null ? "<null>" : New_idx.ToString());
sb.Append(")");
return sb.ToString();
}