Possible extension - parse query and generate type-safe code

[johnpmayer]

This has existed for a few years:

https://www.haskell.org/haskellwiki/MetaHDBC

Essentially parses the query and generates type-safe code function @ compile time. Not sure how much of that is possible in Rust macros.

[Manishearth]

It's possible.

[jbg]

This is a really cool idea but I can see some potential problems.

SELECT col1, col2, col3 FROM table1 WHERE col4=?

There's no way to know the type of col[1-4] from that query without connecting to the database and inspecting the schema. So this library goes from just parsing the query to actually needing to connect to the database at compile time. Also, the schema could be changed in the database after the Rust program is compiled.