7. Savepoints

Manual driver transactions expose named savepoints:

let mut transaction = pool.begin().await?;
transaction.execute("INSERT INTO users ...").await?;
transaction.savepoint("optional_commenter").await?;
transaction.execute("INSERT INTO users ...").await?;
transaction
    .rollback_to_savepoint("optional_commenter")
    .await?;

transaction.release_savepoint("optional_commenter").await?;
transaction.commit().await?;

Names are validated before Rent emits SQL. Use savepoints for recoverable sub-steps; use the closure API when the whole operation should succeed or fail together.

The accompanying one-model schema is crates/rent/examples/tutorial_06_savepoints/schema.rsl. Run cargo run -p rent --example tutorial_06_savepoints. The same savepoint workflow runs under nextest.