[Query Macros] Shorthand to force all columns to be not null?

[mjpauly]

I'm using SQLite with a database schema where all column values are required (not nullable). Unfortunately query_as! doesn't infer the nullability of the columns correctly. So if I want to use query macros, a query to get the last row expands from:

SELECT * FROM my_table ORDER BY timestamp DESC LIMIT 1

to the voluminous:

SELECT
    col1 as "col1!",
    col2 as "col2!",
    col3 as "col3!",
    col4 as "col4!",
    col5 as "col5!",
    col6 as "col6!",
    col7 as "col7!"
FROM my_table ORDER BY timestamp DESC LIMIT 1

Is there possibly any shorthand for this?

I also looked into trying to extract the SELECT ... FROM my_table part to a static variable to format!() with the rest of the query, but I get an error that query_as! "expected string literal".