docs: Add an example for sqlx

Signed-off-by: Xuanwo <github@xuanwo.io>

Cargo.toml

@@ -15,4 +15,5 @@ tokio = { version = "1", features = ["time"] }
 [dev-dependencies]
 anyhow = "1"
 reqwest = "0.12"
-tokio = { version = "1", features = ["time", "rt", "macros", "sync"] }
+tokio = { version = "1", features = ["time", "rt", "macros", "sync", "rt-multi-thread"] }
+sqlx = { version = "0.8.0", features = ["runtime-tokio", "sqlite"] }

examples/sqlx.rs

@@ -0,0 +1,20 @@
+use anyhow::Result;
+use backon::ExponentialBuilder;
+use backon::Retryable;
+use sqlx::sqlite::SqlitePoolOptions;
+
+#[tokio::main]
+async fn main() -> Result<()> {
+    let pool = SqlitePoolOptions::new()
+        .max_connections(5)
+        .connect("sqlite::memory:")
+        .await?;
+
+    let row: (i64,) = (|| sqlx::query_as("SELECT $1").bind(150_i64).fetch_one(&pool))
+        .retry(&ExponentialBuilder::default())
+        .await?;
+
+    assert_eq!(row.0, 150);
+
+    Ok(())
+}