Custom sql function with rust implementation

[giovanniberti]

Is it possible to have a rust function/operator calling in SQL/Diesel DSL?
I need it to store and retrieve passwords from a db, and I'm using the scrypt crate, which has a scrypt_check function, so I can't use the simple .eq() function from diesel's dsl.

[sgrif]

This is entirely dependent on how your database works. For SQLite, yes. For other DBs you would need to write an extension for your database server which is outside of the scope of Diesel.