default:
	case <-ctx.Done():
		return nil, ctx.Err()
	}
	return si.Query(dargs)
}

func ctxDriverBegin(ctx context.Context, opts *TxOptions, ci driver.Conn) (driver.Tx, error) {
	if ciCtx, is := ci.(driver.ConnBeginTx); is {
		dopts := driver.TxOptions{}
		if opts != nil {
			dopts.Isolation = driver.IsolationLevel(opts.Isolation)
			dopts.ReadOnly = opts.ReadOnly
		}
		return ciCtx.BeginTx(ctx, dopts)
	}

//
// This type should be considered identical to [database/sql.TxOptions].
type TxOptions struct {
	Isolation IsolationLevel
	ReadOnly  bool
}

// ConnBeginTx enhances the [Conn] interface with context and [TxOptions].
type ConnBeginTx interface {
	// BeginTx starts and returns a new transaction.
	// If the context is canceled by the user the sql package will

pkg database/sql, const LevelSnapshot IsolationLevel
pkg database/sql, const LevelWriteCommitted = 3
pkg database/sql, const LevelWriteCommitted IsolationLevel
pkg database/sql/driver, type ConnBeginTx interface { BeginTx }
pkg database/sql/driver, type ConnBeginTx interface, BeginTx(context.Context, TxOptions) (Tx, error)
pkg database/sql/driver, type ConnPrepareContext interface { PrepareContext }

	}

	if keepConnOnRollback {
		waitForFree(t, db, 1)
	} else {
		waitForFree(t, db, 0)
	}
}

// TestUnsupportedOptions checks that the database fails when a driver that
// doesn't implement ConnBeginTx is used with non-default options and an
// un-cancellable context.
func TestUnsupportedOptions(t *testing.T) {
	db := newTestDB(t, "people")
	defer closeDB(t, db)
	_, err := db.BeginTx(context.Background(), &TxOptions{

		{"(Null).ConvertValue", Method, 0},
		{"(RowsAffected).LastInsertId", Method, 0},
		{"(RowsAffected).RowsAffected", Method, 0},
		{"Bool", Var, 0},
		{"ColumnConverter", Type, 0},
		{"Conn", Type, 0},
		{"ConnBeginTx", Type, 8},
		{"ConnPrepareContext", Type, 8},
		{"Connector", Type, 10},
		{"DefaultParameterConverter", Var, 0},
		{"Driver", Type, 0},
		{"DriverContext", Type, 10},
		{"ErrBadConn", Var, 0},