diff --git a/include/MySQL_Session.h b/include/MySQL_Session.h
index 4d3b4e146..073a60fbe 100644
--- a/include/MySQL_Session.h
+++ b/include/MySQL_Session.h
@@ -114,6 +114,9 @@ class MySQL_Session
 	bool handler_again___verify_backend_sql_log_bin();
 	bool handler_again___verify_backend_sql_mode();
 	bool handler_again___verify_backend_time_zone();
+	bool handler_again___verify_backend_isolation_level();
+	bool handler_again___verify_backend_character_set_results();
+	bool handler_again___verify_backend_session_track_gtids();
 	bool handler_again___status_SETTING_INIT_CONNECT(int *);
 	bool handler_again___status_SETTING_LDAP_USER_VARIABLE(int *);
 	bool handler_again___status_SETTING_SQL_LOG_BIN(int *);
diff --git a/include/proxysql_structs.h b/include/proxysql_structs.h
index 10e59034d..8c77bfa96 100644
--- a/include/proxysql_structs.h
+++ b/include/proxysql_structs.h
@@ -152,6 +152,9 @@ enum session_status {
 	SETTING_SQL_LOG_BIN,
 	SETTING_SQL_MODE,
 	SETTING_TIME_ZONE,
+	SETTING_ISOLATION_LEVEL,
+	SETTING_CHARACTER_SET_RESULTS,
+	SETTING_SESSION_TRACK_GTIDS,
 	FAST_FORWARD,
 	PROCESSING_STMT_PREPARE,
 	PROCESSING_STMT_EXECUTE,
diff --git a/lib/MySQL_Session.cpp b/lib/MySQL_Session.cpp
index 790c0cf3d..c365d73b4 100644
--- a/lib/MySQL_Session.cpp
+++ b/lib/MySQL_Session.cpp
@@ -1649,6 +1649,134 @@ bool MySQL_Session::handler_again___verify_backend_time_zone() {
 	return false;
 }
 
+bool MySQL_Session::handler_again___verify_backend_isolation_level() {
+	if (mybe->server_myds->myconn->options.isolation_level_int==0) {
+		// it is the first time we use this backend. Set isolation_level to default
+		if (mybe->server_myds->myconn->options.isolation_level) {
+			free(mybe->server_myds->myconn->options.isolation_level);
+			mybe->server_myds->myconn->options.isolation_level=NULL;
+		}
+		mybe->server_myds->myconn->options.isolation_level=strdup(mysql_thread___default_isolation_level);
+		uint32_t isolation_level_int=SpookyHash::Hash32(mybe->server_myds->myconn->options.isolation_level,strlen(mybe->server_myds->myconn->options.isolation_level),10);
+		mybe->server_myds->myconn->options.isolation_level_int=isolation_level_int;
+	}
+	if (client_myds->myconn->options.isolation_level_int) {
+		if (client_myds->myconn->options.isolation_level_int != mybe->server_myds->myconn->options.isolation_level_int) {
+			{
+				mybe->server_myds->myconn->options.isolation_level_int = client_myds->myconn->options.isolation_level_int;
+				if (mybe->server_myds->myconn->options.isolation_level) {
+					free(mybe->server_myds->myconn->options.isolation_level);
+					mybe->server_myds->myconn->options.isolation_level=NULL;
+					if (client_myds->myconn->options.isolation_level) {
+						mybe->server_myds->myconn->options.isolation_level=strdup(client_myds->myconn->options.isolation_level);
+					}
+				}
+			}
+			switch(status) { // this switch can be replaced with a simple previous_status.push(status), but it is here for readibility
+				case PROCESSING_QUERY:
+					previous_status.push(PROCESSING_QUERY);
+					break;
+				case PROCESSING_STMT_PREPARE:
+					previous_status.push(PROCESSING_STMT_PREPARE);
+					break;
+				case PROCESSING_STMT_EXECUTE:
+					previous_status.push(PROCESSING_STMT_EXECUTE);
+					break;
+				default:
+					assert(0);
+					break;
+			}
+			NEXT_IMMEDIATE_NEW(SETTING_ISOLATION_LEVEL);
+		}
+	}
+	return false;
+}
+
+bool MySQL_Session::handler_again___verify_backend_character_set_results() {
+	if (mybe->server_myds->myconn->options.character_set_results_int==0) {
+		// it is the first time we use this backend. Set character_set_results to default
+		if (mybe->server_myds->myconn->options.character_set_results) {
+			free(mybe->server_myds->myconn->options.character_set_results);
+			mybe->server_myds->myconn->options.character_set_results=NULL;
+		}
+		mybe->server_myds->myconn->options.character_set_results=strdup(mysql_thread___default_character_set_results);
+		uint32_t character_set_results_int=SpookyHash::Hash32(mybe->server_myds->myconn->options.character_set_results,strlen(mybe->server_myds->myconn->options.character_set_results),10);
+		mybe->server_myds->myconn->options.character_set_results_int=character_set_results_int;
+	}
+	if (client_myds->myconn->options.character_set_results_int) {
+		if (client_myds->myconn->options.character_set_results_int != mybe->server_myds->myconn->options.character_set_results_int) {
+			{
+				mybe->server_myds->myconn->options.character_set_results_int = client_myds->myconn->options.character_set_results_int;
+				if (mybe->server_myds->myconn->options.character_set_results) {
+					free(mybe->server_myds->myconn->options.character_set_results);
+					mybe->server_myds->myconn->options.character_set_results=NULL;
+					if (client_myds->myconn->options.character_set_results) {
+						mybe->server_myds->myconn->options.character_set_results=strdup(client_myds->myconn->options.character_set_results);
+					}
+				}
+			}
+			switch(status) { // this switch can be replaced with a simple previous_status.push(status), but it is here for readibility
+				case PROCESSING_QUERY:
+					previous_status.push(PROCESSING_QUERY);
+					break;
+				case PROCESSING_STMT_PREPARE:
+					previous_status.push(PROCESSING_STMT_PREPARE);
+					break;
+				case PROCESSING_STMT_EXECUTE:
+					previous_status.push(PROCESSING_STMT_EXECUTE);
+					break;
+				default:
+					assert(0);
+					break;
+			}
+			NEXT_IMMEDIATE_NEW(SETTING_CHARACTER_SET_RESULTS);
+		}
+	}
+	return false;
+}
+
+bool MySQL_Session::handler_again___verify_backend_session_track_gtids() {
+	if (mybe->server_myds->myconn->options.session_track_gtids_int==0) {
+		// it is the first time we use this backend. Set session_track_gtids to default
+		if (mybe->server_myds->myconn->options.session_track_gtids) {
+			free(mybe->server_myds->myconn->options.session_track_gtids);
+			mybe->server_myds->myconn->options.session_track_gtids=NULL;
+		}
+		mybe->server_myds->myconn->options.session_track_gtids=strdup(mysql_thread___default_session_track_gtids);
+		uint32_t session_track_gtids_int=SpookyHash::Hash32(mybe->server_myds->myconn->options.session_track_gtids,strlen(mybe->server_myds->myconn->options.session_track_gtids),10);
+		mybe->server_myds->myconn->options.session_track_gtids_int=session_track_gtids_int;
+	}
+	if (client_myds->myconn->options.session_track_gtids_int) {
+		if (client_myds->myconn->options.session_track_gtids_int != mybe->server_myds->myconn->options.session_track_gtids_int) {
+			{
+				mybe->server_myds->myconn->options.session_track_gtids_int = client_myds->myconn->options.session_track_gtids_int;
+				if (mybe->server_myds->myconn->options.session_track_gtids) {
+					free(mybe->server_myds->myconn->options.session_track_gtids);
+					mybe->server_myds->myconn->options.session_track_gtids=NULL;
+					if (client_myds->myconn->options.session_track_gtids) {
+						mybe->server_myds->myconn->options.session_track_gtids=strdup(client_myds->myconn->options.session_track_gtids);
+					}
+				}
+			}
+			switch(status) { // this switch can be replaced with a simple previous_status.push(status), but it is here for readibility
+				case PROCESSING_QUERY:
+					previous_status.push(PROCESSING_QUERY);
+					break;
+				case PROCESSING_STMT_PREPARE:
+					previous_status.push(PROCESSING_STMT_PREPARE);
+					break;
+				case PROCESSING_STMT_EXECUTE:
+					previous_status.push(PROCESSING_STMT_EXECUTE);
+					break;
+				default:
+					assert(0);
+					break;
+			}
+			NEXT_IMMEDIATE_NEW(SETTING_SESSION_TRACK_GTIDS);
+		}
+	}
+	return false;
+}
 
 bool MySQL_Session::handler_again___verify_init_connect() {
 	if (mybe->server_myds->myconn->options.init_connect_sent==false) {
diff --git a/lib/MySQL_Thread.cpp b/lib/MySQL_Thread.cpp
index 922d78dc9..9cd64b7c4 100644
--- a/lib/MySQL_Thread.cpp
+++ b/lib/MySQL_Thread.cpp
@@ -2146,6 +2146,45 @@ bool MySQL_Threads_Handler::set_variable(char *name, char *value) {	// this is t
 		return true;
 	}
 
+	if (!strcasecmp(name,"default_isolation_level")) {
+		if (variables.default_isolation_level) free(variables.default_isolation_level);
+		variables.default_isolation_level=NULL;
+		if (vallen) {
+			if (strcmp(value,"(null)"))
+				variables.default_isolation_level=strdup(value);
+		}
+		if (variables.default_isolation_level==NULL) {
+			variables.default_isolation_level=strdup((char *)MYSQL_DEFAULT_ISOLATION_LEVEL); // default
+		}
+		return true;
+	}
+
+	if (!strcasecmp(name,"default_character_set_results")) {
+		if (variables.default_character_set_results) free(variables.default_character_set_results);
+		variables.default_character_set_results=NULL;
+		if (vallen) {
+			if (strcmp(value,"(null)"))
+				variables.default_character_set_results=strdup(value);
+		}
+		if (variables.default_character_set_results==NULL) {
+			variables.default_character_set_results=strdup((char *)MYSQL_DEFAULT_CHARACTER_SET_RESULTS); // default
+		}
+		return true;
+	}
+
+	if (!strcasecmp(name,"default_session_track_gtids")) {
+		if (variables.default_session_track_gtids) free(variables.default_session_track_gtids);
+		variables.default_session_track_gtids=NULL;
+		if (vallen) {
+			if (strcmp(value,"(null)"))
+				variables.default_session_track_gtids=strdup(value);
+		}
+		if (variables.default_session_track_gtids==NULL) {
+			variables.default_session_track_gtids=strdup((char *)MYSQL_DEFAULT_SESSION_TRACK_GTIDS); // default
+		}
+		return true;
+	}
+
 	if (!strcasecmp(name,"keep_multiplexing_variables")) {
 		if (vallen) {
 			free(variables.keep_multiplexing_variables);
@@ -2935,6 +2974,28 @@ MySQL_Session * MySQL_Thread::create_new_session_and_client_data_stream(int _fd)
 		free(sess->client_myds->myconn->options.time_zone);
 	}
 	sess->client_myds->myconn->options.time_zone=strdup(mysql_thread___default_time_zone);
+
+	uint32_t isolation_level_int=SpookyHash::Hash32(mysql_thread___default_isolation_level,strlen(mysql_thread___default_isolation_level),10);
+	sess->client_myds->myconn->options.isolation_level_int = isolation_level_int;
+	if (sess->client_myds->myconn->options.isolation_level) {
+		free(sess->client_myds->myconn->options.isolation_level);
+	}
+	sess->client_myds->myconn->options.isolation_level=strdup(mysql_thread___default_isolation_level);
+
+	uint32_t character_set_results_int=SpookyHash::Hash32(mysql_thread___default_character_set_results,strlen(mysql_thread___default_character_set_results),10);
+	sess->client_myds->myconn->options.character_set_results_int = character_set_results_int;
+	if (sess->client_myds->myconn->options.character_set_results) {
+		free(sess->client_myds->myconn->options.character_set_results);
+	}
+	sess->client_myds->myconn->options.character_set_results=strdup(mysql_thread___default_character_set_results);
+
+	uint32_t session_track_gtids_int=SpookyHash::Hash32(mysql_thread___default_session_track_gtids,strlen(mysql_thread___default_session_track_gtids),10);
+	sess->client_myds->myconn->options.session_track_gtids_int = session_track_gtids_int;
+	if (sess->client_myds->myconn->options.session_track_gtids) {
+		free(sess->client_myds->myconn->options.session_track_gtids);
+	}
+	sess->client_myds->myconn->options.session_track_gtids=strdup(mysql_thread___default_session_track_gtids);
+
 	return sess;
 }