func()

in xray/sql_context.go [154:180]

• 27 lines of code
• 7 McCabe index (conditional complexity)

func (conn *driverConn) BeginTx(ctx context.Context, opts driver.TxOptions) (driver.Tx, error) {
	var tx driver.Tx
	var err error
	if connCtx, ok := conn.Conn.(driver.ConnBeginTx); ok {
		tx, err = connCtx.BeginTx(ctx, opts)
	} else {
		if opts.Isolation != driver.IsolationLevel(sql.LevelDefault) {
			return nil, errors.New("xray: driver does not support non-default isolation level")
		}
		if opts.ReadOnly {
			return nil, errors.New("xray: driver does not support read-only transactions")
		}
		tx, err = conn.Conn.Begin()
		if err == nil {
			select {
			default:
			case <-ctx.Done():
				tx.Rollback()
				return nil, ctx.Err()
			}
		}
	}
	if err != nil {
		return nil, err
	}
	return &driverTx{Tx: tx}, nil
}