From 14063b20a6e12890bf05f68f5651ffbdf6b31687 Mon Sep 17 00:00:00 2001
From: Paul Nienaber <paul.nienaber@dremio.com>
Date: Thu, 16 Nov 2023 12:35:58 -0800
Subject: [PATCH] [builds] CI fixups

---
 cpp/src/arrow/flight/sql/server_session_middleware.cc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/cpp/src/arrow/flight/sql/server_session_middleware.cc b/cpp/src/arrow/flight/sql/server_session_middleware.cc
index a69afbafdf02b..e788a83661c7e 100644
--- a/cpp/src/arrow/flight/sql/server_session_middleware.cc
+++ b/cpp/src/arrow/flight/sql/server_session_middleware.cc
@@ -15,6 +15,8 @@
 // specific language governing permissions and limitations
 // under the License.
 
+#include <mutex>
+
 #include "arrow/flight/sql/server_session_middleware.h"
 
 namespace arrow {
@@ -32,7 +34,7 @@ class ServerSessionMiddlewareFactory : public ServerMiddlewareFactory {
       const std::string_view& s);
 
  public:
-  ServerSessionMiddlewareFactory(std::function<std::string()> id_gen)
+  explicit ServerSessionMiddlewareFactory(std::function<std::string()> id_gen)
       : id_generator_(id_gen) {}
   Status StartCall(const CallInfo&, const CallHeaders& incoming_headers,
                    std::shared_ptr<ServerMiddleware>* middleware);