sqldiff

sqldiff is a set of primitives to load SQL representations in a standardized form (sqldiff::Schema), calculate differences between schemas (sqldiff::Migration), and generate SQL to apply the migration (sqldiff::Migration::to_sql).

Currently built-in schema sources: - Postgres - OpenAPI 3.0 spec

Tools that want to auto-generate migrations should define a way to load their schema into sqldiff::Schema and then use sqldiff to auto-generate migrations.

Current tools that support this:

• ormlite

If you use this library, submit a PR to be added to this list.

```rust

[tokio::main]

async fn main() { let url = std::env::var("DATABASEURL").unwrap(); let mut conn = sqlx::postgres::PgConnection::connect(&url).await?; let current = Schema::tryfromdatabase(&mut conn, schemaname).await?; let endstate = Schema::new(); // Load your end-state by manually defining it, or building it from another source let migration = current.migrateto(end_state, &sqldiff::Options::default());

for statement in migration.statements {
    let statement = statement.prepare(schema_name);
    println!("{}", statement);
}

} ```