How does await using prevent database connection leaks?

Automatic disposal of database handles, streams, and locks even when promises reject. Nested scopes cleanup in reverse order correctly. Eliminates try/finally boilerplate completely. Compiler-verified resource management.

Example:-

Code

await using client = await pg.connect(pool);
await using tx = await client.query('BEGIN');
await client.query('INSERT INTO users ...');
await tx.query('COMMIT'); // Auto-ROLLBACK on error