Merge pull request #754 from pleshevskiy/task-753

feat: add method to clear types cache

Author: sfackler

tokio-postgres/src/client.rs

@@ -113,6 +113,10 @@ impl InnerClient {
         self.state.lock().types.insert(oid, type_.clone());
     }
 
+    pub fn clear_types(&self) {
+        self.state.lock().types.clear();
+    }
+
     pub fn with_buf<F, R>(&self, f: F) -> R
     where
         F: FnOnce(&mut BytesMut) -> R,
@@ -176,6 +180,11 @@ impl Client {
         &self.inner
     }
 
+    /// Clears the cache of database types (domain, enum, composition) that are loaded when preparing a query.
+    pub fn clear_types_cache(&self) {
+        self.inner().clear_types()
+    }
+
     #[cfg(feature = "runtime")]
     pub(crate) fn set_socket_config(&mut self, socket_config: SocketConfig) {
         self.socket_config = Some(socket_config);