fix(postgres): get correctly qualified type name in describe

sqlx-postgres/src/connection/describe.rs

@@ -187,7 +187,16 @@ impl PgConnection {
     fn fetch_type_by_oid(&mut self, oid: Oid) -> BoxFuture<'_, Result<PgTypeInfo, Error>> {
         Box::pin(async move {
             let (name, typ_type, category, relation_id, element, base_type): (String, i8, i8, Oid, Oid, Oid) = query_as(
-                "SELECT typname, typtype, typcategory, typrelid, typelem, typbasetype FROM pg_catalog.pg_type WHERE oid = $1",
+                // Converting the OID to `regtype` and then `text` will give us the name that
+                // the type will need to be found at by search_path.
+                "SELECT oid::regtype::text, \
+                     typtype, \
+                     typcategory, \
+                     typrelid, \
+                     typelem, \
+                     typbasetype \
+                     FROM pg_catalog.pg_type \
+                     WHERE oid = $1",
             )
             .bind(oid)
             .fetch_one(&mut *self)

tests/postgres/derives.rs

@@ -724,3 +724,29 @@ async fn test_skip() -> anyhow::Result<()> {
 
     Ok(())
 }
+
+#[cfg(feature = "macros")]
+#[sqlx_macros::test]
+async fn test_enum_with_schema() -> anyhow::Result<()> {
+    #[derive(Debug, PartialEq, Eq, sqlx::Type)]
+    #[sqlx(type_name = "foo.\"Foo\"")]
+    enum Foo {
+        Bar,
+        Baz,
+    }
+
+    let mut conn = new::<Postgres>().await?;
+
+    let foo: Foo = sqlx::query_scalar("SELECT $1::foo.\"Foo\"")
+        .bind(Foo::Bar)
+        .fetch_one(&mut conn).await?;
+
+    assert_eq!(foo, Foo::Bar);
+
+    let foo: Foo = sqlx::query_scalar("SELECT $1::foo.\"Foo\"")
+        .bind(Foo::Baz)
+        .fetch_one(&mut conn)
+        .await?;
+
+    assert_eq!(foo, Foo::Baz);
+}

tests/postgres/setup.sql

@@ -51,3 +51,7 @@ CREATE OR REPLACE PROCEDURE forty_two(INOUT forty_two INT = NULL)
 CREATE TABLE test_citext (
     foo CITEXT NOT NULL
 );
+
+CREATE SCHEMA IF NOT EXISTS foo;
+
+CREATE ENUM foo."Foo" ('Bar', 'Baz');