Generating types for composed template strings

[tantaman]

Generating types for composed template strings is going to be fun 😅

If you're up for it, we'll need to work on converting a string like the above to something we can pass to the SQL type generator.

So:

SELECT ${column} FROM ${table} ${condition} OR a=${"42"}

should be temporarily transformed to:

SELECT "a" FROM "a" WHERE a=? OR a=? OR a=?

at compile time and passed to the type-gen package. The TypeScript Compiler APIs let you inspect all the fragments that make up a template string and pull their type information. That should provide enough information to do the transform given sql.column("a"); would return a literal column type of "a". Same with table.

Values we can ignore (at least to start. Balues in non-value positions would pose a problem) and substitute ? in their place.

We'd do this in a future PR.

Originally posted by @tantaman in #4 (comment)