From 927ea88084c23c8f497d4be58049230e2a73cace Mon Sep 17 00:00:00 2001
From: Aleksey Midenkov <midenok@gmail.com>
Date: Wed, 20 Nov 2019 13:19:01 +0300
Subject: [PATCH] =?UTF-8?q?MDEV-16264=20fix=20unused=20variable=20?=
 =?UTF-8?q?=E2=80=98save=5Fpsi=5Fthread=E2=80=99?=
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---
 sql/sql_class.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sql/sql_class.cc b/sql/sql_class.cc
index d75cac56bff..09c609cdd99 100644
--- a/sql/sql_class.cc
+++ b/sql/sql_class.cc
@@ -4892,7 +4892,9 @@ void destroy_background_thd(MYSQL_THD thd)
      Also preserve current PSI context, since my_thread_end()
      would kill it, if we're not careful.
   */
+#ifdef HAVE_PSI_THREAD_INTERFACE
   auto save_psi_thread= PSI_CALL_get_thread();
+#endif
   PSI_CALL_set_thread(0);
   pthread_setspecific(THR_KEY_mysys, thd_mysys_var);
   my_thread_end();