fix(query): fix coverity issue.

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

@@ -874,8 +874,10 @@ static int32_t doLoadFileBlock(STsdbReader* pReader, SArray* pIndexList, SBlockN
       pBlockNum->numOfBlocks += 1;
     }
 
-    if ((pScanInfo->pBlockList != NULL )&& (taosArrayGetSize(pScanInfo->pBlockList) > 0)) {
-      numOfQTable += 1;
+    if (pScanInfo->pBlockList != NULL) {
+      if (taosArrayGetSize(pScanInfo->pBlockList) > 0) {
+        numOfQTable += 1;
+      }
     }
   }
 

source/libs/executor/src/executor.c

@@ -471,7 +471,7 @@ int32_t qCreateExecTask(SReadHandle* readHandle, int32_t vgId, uint64_t taskId,
   if (handle) {
     void* pSinkParam = NULL;
     code = createDataSinkParam(pSubplan->pDataSink, &pSinkParam, pTaskInfo, readHandle);
-    if (code != TSDB_CODE_SUCCESS) {
+    if (code != TSDB_CODE_SUCCESS || pSinkParam == NULL) {
       qError("failed to createDataSinkParam, vgId:%d, code:%s, %s", vgId, tstrerror(code), (*pTask)->id.str);
       goto _error;
     }

source/libs/executor/src/executorimpl.c

@@ -2015,6 +2015,11 @@ SSchemaWrapper* extractQueriedColumnSchema(SScanPhysiNode* pScanNode);
 
 int32_t extractTableSchemaInfo(SReadHandle* pHandle, SScanPhysiNode* pScanNode, SExecTaskInfo* pTaskInfo) {
   SMetaReader mr = {0};
+  if (pHandle == NULL) {
+    terrno = TSDB_CODE_INVALID_PARA;
+    return terrno;
+  }
+
   metaReaderInit(&mr, pHandle->meta, 0);
   int32_t code = metaGetTableEntryByUidCache(&mr, pScanNode->uid);
   if (code != TSDB_CODE_SUCCESS) {