You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: mod.rs
    path of file: ./repos/readyset/readyset-server/src/controller/sql/recipe
    
    the code of the file until where you have to start completion: use std::{fmt, str};

use nom_sql::{Relation, SelectStatement, SqlIdentifier};
use petg
    
    fn from(value: &SelectStatement) -> ExprId {
        let mut hasher = Sha1::new();
        hasher.update(hash(value).to_le_bytes());
        // Sha1 digest is 20 byte long, so it is safe to consume only 16 bytes
        Self(u128::from_le_bytes(
            hasher.finalize()[..16].try_into().unwrap(),
        ))
    }