fix: snapshot problem

source/dnode/vnode/src/meta/metaQuery.c

@@ -706,9 +706,8 @@ int32_t metaGetTbTSchemaEx(SMeta *pMeta, tb_uid_t suid, tb_uid_t uid, int32_t sv
     }
   }
 
-  if (sver <= 0) {
-    metaError("meta/query: incorrect sver: %" PRId32 ".", sver);
-    code = TSDB_CODE_FAILED;
+  if (taosAssertDebug(sver > 0, __FILE__, __LINE__, "failed to get table schema version: %d", sver) < 0) {
+    code = TSDB_CODE_NOT_FOUND;
     goto _exit;
   }
 

source/dnode/vnode/src/tsdb/tsdbSnapshot.c

@@ -732,6 +732,8 @@ static int32_t tsdbSnapReadTimeSeriesData(STsdbSnapReader* pReader, uint8_t** pp
   }
 
   if (pReader->bData.nRow > 0) {
+    ASSERT(pReader->bData.suid || pReader->bData.uid);
+
     code = tsdbSnapCmprData(pReader, ppData);
     TSDB_CHECK_CODE(code, lino, _exit);
   }

source/dnode/vnode/src/tsdb/tsdbUtil.c

@@ -1133,6 +1133,7 @@ _exit:
 void tBlockDataReset(SBlockData *pBlockData) {
   pBlockData->suid = 0;
   pBlockData->uid = 0;
+  pBlockData->nRow = 0;
 }
 
 void tBlockDataClear(SBlockData *pBlockData) {