@@ -2165,20 +2165,21 @@ Datum mtm_dump_lock_graph(PG_FUNCTION_ARGS)
21652165{
21662166size_t size ;
21672167char * data = RaftableGet (psprintf ("lock-graph-%d" ,i + 1 ),& size ,NULL , true);
2168- if (!data )continue ;
2169- GlobalTransactionId * gtid = (GlobalTransactionId * )data ;
2170- GlobalTransactionId * last = (GlobalTransactionId * )(data + size );
2171- appendStringInfo (s ,"node-%d lock graph: " ,i + 1 );
2172- while (gtid != last ) {
2173- GlobalTransactionId * src = gtid ++ ;
2174- appendStringInfo (s ,"%d:%d -> " ,src -> node ,src -> xid );
2175- while (gtid -> node != 0 ) {
2176- GlobalTransactionId * dst = gtid ++ ;
2177- appendStringInfo (s ,"%d:%d, " ,dst -> node ,dst -> xid );
2168+ if (data ) {
2169+ GlobalTransactionId * gtid = (GlobalTransactionId * )data ;
2170+ GlobalTransactionId * last = (GlobalTransactionId * )(data + size );
2171+ appendStringInfo (s ,"node-%d lock graph: " ,i + 1 );
2172+ while (gtid != last ) {
2173+ GlobalTransactionId * src = gtid ++ ;
2174+ appendStringInfo (s ,"%d:%d -> " ,src -> node ,src -> xid );
2175+ while (gtid -> node != 0 ) {
2176+ GlobalTransactionId * dst = gtid ++ ;
2177+ appendStringInfo (s ,"%d:%d, " ,dst -> node ,dst -> xid );
2178+ }
2179+ gtid += 1 ;
21782180}
2179- gtid += 1 ;
2181+ appendStringInfo ( s , "\n" ) ;
21802182}
2181- appendStringInfo (s ,"\n" );
21822183}
21832184return CStringGetTextDatum (s -> data );
21842185}