Am I missing a way to put a Query in the slice ? i...

# exposed

[spand]

Am I missing a way to put a Query in the slice ? ie.

INSERT INTO Tbl (parentId, number)
VALUES (42,
        COALESCE((SELECT MAX(aTbl.number) FROM Tbl as aTbl WHERE aTbl.parentId = 42) + 1, 1)
        );

I kind of expected a way to turn a query into an Expression<Int>.