fix: compilation error, warnings

sqlx-core/src/error.rs

@@ -263,13 +263,13 @@ pub trait DatabaseError: 'static + Send + Sync + StdError {
     /// For example, the Postgres driver overrides this to return `true` for the following error codes:
     ///
     /// * `53300 too_many_connections`: returned when the maximum connections are exceeded
-    /// on the server. Assumed to be the result of a temporary overcommit
-    /// (e.g. an extra application replica being spun up to replace one that is going down).
+    ///   on the server. Assumed to be the result of a temporary overcommit
+    ///   (e.g. an extra application replica being spun up to replace one that is going down).
     ///   * This error being consistently logged or returned is a likely indicator of a misconfiguration;
     ///     the sum of [`PoolOptions::max_connections`] for all replicas should not exceed
     ///     the maximum connections allowed by the server.
     /// * `57P03 cannot_connect_now`: returned when the database server is still starting up
-    /// and the tcop component is not ready to accept connections yet.
+    ///   and the tcop component is not ready to accept connections yet.
     fn is_retryable_connect_error(&self) -> bool {
         false
     }

sqlx-core/src/pool/connect.rs

@@ -1,21 +1,18 @@
 use crate::connection::{ConnectOptions, Connection};
 use crate::database::Database;
-use crate::pool::connection::{Floating, Live};
+use crate::pool::connection::Floating;
 use crate::pool::inner::PoolInner;
 use crate::pool::PoolConnection;
 use crate::rt::JoinHandle;
 use crate::Error;
 use ease_off::EaseOff;
-use event_listener::{Event, EventListener};
+use event_listener::Event;
 use std::fmt::{Display, Formatter};
 use std::future::Future;
-use std::pin::Pin;
 use std::ptr;
 use std::sync::atomic::{AtomicUsize, Ordering};
-use std::sync::{Arc, RwLock};
-use std::task::{Context, Poll};
-use std::time::{Duration, Instant};
-use tracing::Instrument;
+use std::sync::Arc;
+use std::time::Instant;
 
 use std::io;
 
@@ -74,7 +71,7 @@ use std::io;
 /// `set_connect_options` and `get_connect_options` were removed in 0.9.0 because they complicated
 /// the pool internals. They can be reimplemented by capturing a mutex, or similar, in the callback.
 ///
-/// This example uses Postgres and [`tokio::sync::Mutex`] but may be adapted to any driver
+/// This example uses Postgres and [`tokio::sync::RwLock`] but may be adapted to any driver
 /// or `async-std`, respectively.
 ///
 /// ```rust,no_run
@@ -197,11 +194,11 @@ pub trait PoolConnector<DB: Database>: Send + Sync + 'static {
     ///
     /// * [`io::ErrorKind::ConnectionRefused`]
     /// * Database errors for which
-    /// [`is_retryable_connect_error`][crate::error::DatabaseError::is_retryable_connect_error]
-    /// returns `true`.
+    ///   [`is_retryable_connect_error`][crate::error::DatabaseError::is_retryable_connect_error]
+    ///   returns `true`.
     /// * [`Error::PoolConnector`] with `retryable: true`.
-    /// This error kind is not returned internally and is designed to allow this method to return
-    /// arbitrary error types not otherwise supported.
+    ///   This error kind is not returned internally and is designed to allow this method to return
+    ///   arbitrary error types not otherwise supported.
     ///
     /// Manual implementations of this method may also use the signature:
     /// ```rust,ignore
@@ -363,7 +360,7 @@ impl ConnectionCounter {
         // Check that `self` can increase size first before we check the parent.
         let acquired = self.acquire_permit_self(pool).await;
 
-        if let Some(parent) = &pool.options.parent_pool {
+        if let Some(parent) = pool.parent() {
             let (_, permit) = parent.0.counter.acquire_permit_self(&parent.0).await;
 
             // consume the parent permit

sqlx-core/src/pool/connection.rs

@@ -3,8 +3,6 @@ use std::ops::{Deref, DerefMut};
 use std::sync::Arc;
 use std::time::{Duration, Instant};
 
-use crate::sync::AsyncSemaphoreReleaser;
-
 use crate::connection::Connection;
 use crate::database::Database;
 use crate::error::Error;

sqlx-core/src/pool/inner.rs

@@ -90,7 +90,7 @@ impl<DB: Database> PoolInner<DB> {
         }
     }
 
-    fn parent(&self) -> Option<&Pool<DB>> {
+    pub(super) fn parent(&self) -> Option<&Pool<DB>> {
         self.options.parent_pool.as_ref()
     }
 

sqlx-core/src/pool/mod.rs

@@ -59,7 +59,6 @@ use std::future::Future;
 use std::pin::Pin;
 use std::sync::Arc;
 use std::task::{Context, Poll};
-use std::time::{Duration, Instant};
 
 use event_listener::EventListener;
 use futures_core::FusedFuture;
@@ -592,15 +591,6 @@ impl FusedFuture for CloseEvent {
     }
 }
 
-/// get the time between the deadline and now and use that as our timeout
-///
-/// returns `Error::PoolTimedOut` if the deadline is in the past
-fn deadline_as_timeout(deadline: Instant) -> Result<Duration, Error> {
-    deadline
-        .checked_duration_since(Instant::now())
-        .ok_or(Error::PoolTimedOut)
-}
-
 #[test]
 #[allow(dead_code)]
 fn assert_pool_traits() {

sqlx-core/src/rt/mod.rs

@@ -62,7 +62,7 @@ pub async fn timeout_at<F: Future>(deadline: Instant, f: F) -> Result<F::Output,
     }
 
     #[cfg(not(feature = "_rt-async-std"))]
-    missing_rt((duration, f))
+    missing_rt((deadline, f))
 }
 
 pub async fn sleep(duration: Duration) {