From 2145507c22ca90943e802976c5a1c6bb5fabeb29 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ren=C3=A9=20Canna=C3=B2?= <rene.cannao@gmail.com>
Date: Thu, 12 Aug 2021 11:52:53 +0200
Subject: [PATCH] If a session is locked on hostgroup , autocommit is copied
 from backend connection

Closes #3459
---
 lib/MySQL_Session.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/lib/MySQL_Session.cpp b/lib/MySQL_Session.cpp
index 9a9f583ea4..0086c3a745 100644
--- a/lib/MySQL_Session.cpp
+++ b/lib/MySQL_Session.cpp
@@ -4436,6 +4436,14 @@ int MySQL_Session::handler() {
 
 					handler_rc0_Process_GTID(myconn);
 
+					// if we are locked on hostgroup, the value of autocommit is copied from the backend connection
+					// see bug #3549
+					if (locked_on_hostgroup >= 0) {
+						assert(myconn != NULL);
+						assert(myconn->mysql != NULL);
+						autocommit = myconn->mysql->server_status & SERVER_STATUS_AUTOCOMMIT;
+					}
+
 					if (mirror == false) {
 						// Support for LAST_INSERT_ID()
 						if (myconn->mysql->insert_id) {