diff --git a/source/libs/executor/src/dataDispatcher.c b/source/libs/executor/src/dataDispatcher.c
index a603bffba5f37b79ee9f4a42546b8bbb3a0c32ea..d8efcf50cac24dca0b444f2e54bf886453e1bb96 100644
--- a/source/libs/executor/src/dataDispatcher.c
+++ b/source/libs/executor/src/dataDispatcher.c
@@ -77,8 +77,8 @@ static void toDataCacheEntry(SDataDispatchHandle* pHandle, const SInputData* pIn
 
   pBuf->useSize = sizeof(SDataCacheEntry);
   pEntry->dataLen = blockEncode(pInput->pData, pEntry->data, numOfCols);
-//  ASSERT(pEntry->numOfRows == *(int32_t*)(pEntry->data + 8));
-//  ASSERT(pEntry->numOfCols == *(int32_t*)(pEntry->data + 8 + 4));
+  //  ASSERT(pEntry->numOfRows == *(int32_t*)(pEntry->data + 8));
+  //  ASSERT(pEntry->numOfCols == *(int32_t*)(pEntry->data + 8 + 4));
 
   pBuf->useSize += pEntry->dataLen;
 
@@ -135,7 +135,7 @@ static int32_t putDataBlock(SDataSinkHandle* pHandle, const SInputData* pInput,
     taosFreeQitem(pBuf);
     return TSDB_CODE_OUT_OF_MEMORY;
   }
-  
+
   toDataCacheEntry(pDispatcher, pInput, pBuf);
   taosWriteQitem(pDispatcher->pDataBlocks, pBuf);
 
@@ -162,14 +162,16 @@ static void getDataLength(SDataSinkHandle* pHandle, int64_t* pLen, bool* pQueryE
 
   SDataDispatchBuf* pBuf = NULL;
   taosReadQitem(pDispatcher->pDataBlocks, (void**)&pBuf);
-  memcpy(&pDispatcher->nextOutput, pBuf, sizeof(SDataDispatchBuf));
-  taosFreeQitem(pBuf);
+  if (pBuf != NULL) {
+    memcpy(&pDispatcher->nextOutput, pBuf, sizeof(SDataDispatchBuf));
+    taosFreeQitem(pBuf);
+  }
 
   SDataCacheEntry* pEntry = (SDataCacheEntry*)pDispatcher->nextOutput.pData;
   *pLen = pEntry->dataLen;
 
-//  ASSERT(pEntry->numOfRows == *(int32_t*)(pEntry->data + 8));
-//  ASSERT(pEntry->numOfCols == *(int32_t*)(pEntry->data + 8 + 4));
+  //  ASSERT(pEntry->numOfRows == *(int32_t*)(pEntry->data + 8));
+  //  ASSERT(pEntry->numOfCols == *(int32_t*)(pEntry->data + 8 + 4));
 
   *pQueryEnd = pDispatcher->queryEnd;
   qDebug("got data len %" PRId64 ", row num %d in sink", *pLen,
@@ -192,8 +194,8 @@ static int32_t getDataBlock(SDataSinkHandle* pHandle, SOutputData* pOutput) {
   pOutput->numOfCols = pEntry->numOfCols;
   pOutput->compressed = pEntry->compressed;
 
-//  ASSERT(pEntry->numOfRows == *(int32_t*)(pEntry->data + 8));
-//  ASSERT(pEntry->numOfCols == *(int32_t*)(pEntry->data + 8 + 4));
+  //  ASSERT(pEntry->numOfRows == *(int32_t*)(pEntry->data + 8));
+  //  ASSERT(pEntry->numOfCols == *(int32_t*)(pEntry->data + 8 + 4));
 
   atomic_sub_fetch_64(&pDispatcher->cachedSize, pEntry->dataLen);
   atomic_sub_fetch_64(&gDataSinkStat.cachedSize, pEntry->dataLen);
diff --git a/source/libs/parser/src/parInsertUtil.c b/source/libs/parser/src/parInsertUtil.c
index 7cc93b448fec577d7449b9d71e481b56080090d9..5791a634df4996a3c0489630e703a8c040e3a955 100644
--- a/source/libs/parser/src/parInsertUtil.c
+++ b/source/libs/parser/src/parInsertUtil.c
@@ -290,7 +290,8 @@ int32_t insGetTableDataCxt(SHashObj* pHash, void* id, int32_t idLen, STableMeta*
   }
   int32_t code = createTableDataCxt(pTableMeta, pCreateTbReq, pTableCxt, colMode);
   if (TSDB_CODE_SUCCESS == code) {
-    code = taosHashPut(pHash, id, idLen, pTableCxt, POINTER_BYTES);
+    void* pData = *pTableCxt; // deal scan coverity
+    code = taosHashPut(pHash, id, idLen, &pData, POINTER_BYTES);
   }
   return code;
 }
diff --git a/source/libs/parser/src/parTranslater.c b/source/libs/parser/src/parTranslater.c
index 6e94883849c13fb719654df477ab550aee716ef1..9c91ce168845e8060383bff376814b71270d09c8 100644
--- a/source/libs/parser/src/parTranslater.c
+++ b/source/libs/parser/src/parTranslater.c
@@ -3517,7 +3517,7 @@ static int32_t translateSetOperProject(STranslateContext* pCxt, SSetOperator* pS
     if (comp > 0) {
       SNode*  pRightFunc = NULL;
       int32_t code = createCastFunc(pCxt, pRight, pLeftExpr->resType, &pRightFunc);
-      if (TSDB_CODE_SUCCESS != code) {
+      if (TSDB_CODE_SUCCESS != code || NULL == pRightFunc) { // deal scan coverity
         return code;
       }
       REPLACE_LIST2_NODE(pRightFunc);
@@ -3525,7 +3525,7 @@ static int32_t translateSetOperProject(STranslateContext* pCxt, SSetOperator* pS
     } else if (comp < 0) {
       SNode*  pLeftFunc = NULL;
       int32_t code = createCastFunc(pCxt, pLeft, pRightExpr->resType, &pLeftFunc);
-      if (TSDB_CODE_SUCCESS != code) {
+      if (TSDB_CODE_SUCCESS != code || NULL == pLeftFunc) { // deal scan coverity
         return code;
       }
       REPLACE_LIST1_NODE(pLeftFunc);