Reset gtid_hid for every request generating an OK packet

lib/MySQL_Session.cpp

@@ -4494,6 +4494,7 @@ void MySQL_Session::handler___status_CONNECTING_CLIENT___STATE_SSL_INIT(PtrSize_
 // returning errors to all clients trying to send multi-statements .
 // see also #1140
 void MySQL_Session::handler___status_WAITING_CLIENT_DATA___STATE_SLEEP___MYSQL_COM_SET_OPTION(PtrSize_t *pkt) {
+	gtid_hid=-1;
 	char v;
 	v=*((char *)pkt->ptr+3);
 	proxy_debug(PROXY_DEBUG_MYSQL_COM, 5, "Got COM_SET_OPTION packet , value %d\n", v);
@@ -4513,6 +4514,7 @@ void MySQL_Session::handler___status_WAITING_CLIENT_DATA___STATE_SLEEP___MYSQL_C
 }
 
 void MySQL_Session::handler___status_WAITING_CLIENT_DATA___STATE_SLEEP___MYSQL_COM_PING(PtrSize_t *pkt) {
+	gtid_hid=-1;
 	proxy_debug(PROXY_DEBUG_MYSQL_COM, 5, "Got COM_PING packet\n");
 	l_free(pkt->size,pkt->ptr);
 	client_myds->setDSS_STATE_QUERY_SENT_NET();
@@ -4575,6 +4577,7 @@ void MySQL_Session::handler___status_WAITING_CLIENT_DATA___STATE_SLEEP___MYSQL_C
 }
 
 void MySQL_Session::handler___status_WAITING_CLIENT_DATA___STATE_SLEEP___MYSQL_COM_INIT_DB(PtrSize_t *pkt) {
+	gtid_hid=-1;
 	proxy_debug(PROXY_DEBUG_MYSQL_COM, 5, "Got COM_INIT_DB packet\n");
 	if (session_type == PROXYSQL_SESSION_MYSQL) {
 		__sync_fetch_and_add(&MyHGM->status.frontend_init_db, 1);
@@ -4601,6 +4604,7 @@ void MySQL_Session::handler___status_WAITING_CLIENT_DATA___STATE_SLEEP___MYSQL_C
 // this function was introduced due to isseu #718
 // some application (like the one written in Perl) do not use COM_INIT_DB , but COM_QUERY with USE dbname
 void MySQL_Session::handler___status_WAITING_CLIENT_DATA___STATE_SLEEP___MYSQL_COM_QUERY_USE_DB(PtrSize_t *pkt) {
+	gtid_hid=-1;
 	proxy_debug(PROXY_DEBUG_MYSQL_COM, 5, "Got COM_QUERY with USE dbname\n");
 	if (session_type == PROXYSQL_SESSION_MYSQL) {
 		__sync_fetch_and_add(&MyHGM->status.frontend_use_db, 1);
@@ -5313,6 +5317,7 @@ void MySQL_Session::handler___status_WAITING_CLIENT_DATA___STATE_SLEEP___MYSQL_C
 }
 
 void MySQL_Session::handler___status_WAITING_CLIENT_DATA___STATE_SLEEP___MYSQL_COM_CHANGE_USER(PtrSize_t *pkt, bool *wrong_pass) {
+	gtid_hid=-1;
 	proxy_debug(PROXY_DEBUG_MYSQL_COM, 5, "Got COM_CHANGE_USER packet\n");
 	//if (session_type == PROXYSQL_SESSION_MYSQL) {
 	if (session_type == PROXYSQL_SESSION_MYSQL || session_type == PROXYSQL_SESSION_SQLITE) {