include-postgres-sql is an extension of include-sql for using Postgres SQL in Rust. It completes include-sql by providing impl_sql macro to generate database access methods from the included SQL. include-postgres-sql uses Rust-Postgres for database access.

Example

Write your SQL and save it in a file. For example, let's say the following is saved as library.sql in the project's sql folder:

-- name: get_loaned_books?
--
-- Returns the list of books loaned to a patron
--
-- # Parameters
--
-- param: user_id: &str - user ID
--
SELECT book_title
  FROM library
 WHERE loaned_to = :user_id
 ORDER BY 1

-- name: loan_books!
--
-- Updates the book records to reflect loan to a patron
--
-- # Parameters
--
-- param: book_titles: &str - book titles
-- param: user_id: &str - user ID
--
UPDATE library
   SET loaned_to = :user_id
     , loaned_on = current_timestamp
 WHERE book_title IN (:book_titles)

And then use it in Rust as:

use include_postgres_sql::{include_sql, impl_sql};
use postgres::{Config, NoTls, Error};

include_sql!("sql/library.sql");

fn main() -> Result<(),Error> {
    let mut db = Config::new().host("localhost").connect(NoTls)?;

    db.loan_books(&["War and Peace", "Gone With the Wind"], "Sheldon Cooper")?;

    db.get_loaned_books("Sheldon Cooper", |row| {
        let book_title : &str = row.try_get(0)?;
        println!("{book_title}");
        Ok(())
    })?;

    Ok(())
}

Or, when include-postgres-sql tokio feature is selected:

use include_postgres_sql::{include_sql, impl_sql};
use tokio_postgres::{Config, NoTls, Error};

include_sql!("sql/library.sql");

#[tokio::main]
async fn main() -> Result<(),Error> {
    let (db, conn) = Config::new().host("localhost").connect(NoTls).await?;
    tokio::spawn(async move {
        if let Err(e) = conn.await {
            eprintln!("connection error: {}", e);
        }
    });

    db.loan_books(&["War and Peace", "Gone With the Wind"], "Sheldon Cooper").await?;

    db.get_loaned_books("Sheldon Cooper", |row| {
        let book_title : &str = row.try_get(0)?;
        println!("{book_title}");
        Ok(())
    }).await?;

    Ok(())
}

Documentation

The included documentation describes the supported SQL file format and provides additional details on the generated code.

💥 Breaking Changes in 0.2

• include-sql changed optional statement terminator from ; to /. SQL files that used ; terminator would need to change it to / or remove it completely.