Question 1

How do I set up connection pooling with mysql_async?

Accepted Answer

Use the Pool::new method with a database URL; the pool is cloneable and Send + Sync, making it easy to share. Remember to call pool.disconnect().await to gracefully shut down connections.

Question 2

mysql_async vs sqlx for MySQL in Rust?

Accepted Answer

mysql_async is async-native and Tokio-specific, offering fine-grained control and features like named parameters. sqlx supports multiple databases and compile-time query checking but may have different async runtime compatibility. Choose based on your need for MySQL-specific optimizations vs. multi-database flexibility.

Question 3

How to enable TLS with rustls in mysql_async?

Accepted Answer

Set the crate features to 'default-rustls' or use 'rustls-tls' with a provider like 'aws-lc-rs'. Note that rustls requires hostnames instead of IPs and may have issues on Windows, as per the README warnings.

Question 4

Does mysql_async support prepared statements?

Accepted Answer

Yes, it uses MySQL's binary protocol for prepared statements with parameter placeholders (?). Named parameters are supported client-side via the params! macro, but mixing positional and named parameters isn't allowed.

Question 5

How to handle LOCAL INFILE operations securely?

Accepted Answer

Configure global or local handlers using OptsBuilder::local_infile_handler or Conn::set_infile_handler. The README warns about security considerations and provides examples for streaming data safely.

Question 6

What's the performance impact of using mysql_async?

Accepted Answer

It's designed for high performance with async non-blocking I/O and connection pooling. However, the text protocol may add parsing overhead, so use binary protocol and prepared statements for optimal speed.

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