txn, err := db.DB().Begin()
    if err != nil {
        return err
    }

    stmt, err := txn.Prepare(pq.CopyIn("column1", "column2", "column3", "columnN"))
    if err != nil {
        return err
    }

    _, err = stmt.Exec(column1Value, column2Value, column3Value, columnNValue)

    if err != nil {
        return err
    }

    _, err = stmt.Exec()
    if err != nil {
        return err
    }

    err = stmt.Close()
    if err != nil {
        return err
    }

    err = txn.Commit()
    if err != nil {
        return err
    }

    return err