func updateDataFail()

in at/rollback/server2/update.go [26:45]

• 18 lines of code
• 4 McCabe index (conditional complexity)

func updateDataFail(ctx context.Context) error {
	// generate an err : data row not exists where id=10000 , affected rows is 0.
	sql := "update order_tbl set descs=? where id=?"
	ret, err := db.ExecContext(ctx, sql, fmt.Sprintf("NewDescs1-%d", time.Now().UnixMilli()), 10000)
	if err != nil {
		fmt.Printf("update failed, err:%v\n", err)
		return err
	}

	rows, err := ret.RowsAffected()
	if err != nil {
		fmt.Printf("update failed, err:%v\n", err)
		return err
	}
	fmt.Printf("update success： %d.\n", rows)
	if rows == 0 {
		return fmt.Errorf("rows affected 0")
	}
	return nil
}