fix(query): add check for table/super table dropped, when retrieving cache rows.

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

@@ -117,8 +117,13 @@ int32_t tsdbCacherowsReaderOpen(void* pVnode, int32_t type, void* pTableIdList,
     return TSDB_CODE_SUCCESS;
   }
 
-  STableKeyInfo* pKeyInfo = &((STableKeyInfo*)pTableIdList)[0];
-  p->pSchema = metaGetTbTSchema(p->pVnode->pMeta, pKeyInfo->uid, -1, 1);
+  p->pSchema = metaGetTbTSchema(p->pVnode->pMeta, suid, -1, 1);
+  if (p->pSchema == NULL) {
+    taosMemoryFree(p);
+    tsdbWarn("stable:%"PRIu64" has been dropped, failed to retrieve cached rows, %s", suid, idstr);
+    return TSDB_CODE_PAR_TABLE_NOT_EXIST;
+  }
+
   p->pTableList = pTableIdList;
   p->numOfTables = numOfTables;
 

source/libs/executor/src/cachescanoperator.c

@@ -215,8 +215,15 @@ SSDataBlock* doScanCache(SOperatorInfo* pOperator) {
         T_LONG_JMP(pTaskInfo->env, code);
       }
 
-      tsdbCacherowsReaderOpen(pInfo->readHandle.vnode, pInfo->retrieveType, pList, num,
-                              taosArrayGetSize(pInfo->matchInfo.pList), suid, &pInfo->pLastrowReader, pTaskInfo->id.str);
+      code = tsdbCacherowsReaderOpen(pInfo->readHandle.vnode, pInfo->retrieveType, pList, num,
+                                     taosArrayGetSize(pInfo->matchInfo.pList), suid, &pInfo->pLastrowReader,
+                                     pTaskInfo->id.str);
+      if (code != TSDB_CODE_SUCCESS) {
+        pInfo->currentGroupIndex += 1;
+        taosArrayClear(pInfo->pUidList);
+        continue;
+      }
+
       taosArrayClear(pInfo->pUidList);
 
       code = tsdbRetrieveCacheRows(pInfo->pLastrowReader, pInfo->pRes, pInfo->pSlotIds, pInfo->pUidList);