diff --git a/source/libs/executor/inc/executorimpl.h b/source/libs/executor/inc/executorimpl.h
index 88f4bdbd3db6aef21f8df64744128a9e89743466..cb45fa97306ac7cc40dccb6f10dafc89ad0c117f 100644
--- a/source/libs/executor/inc/executorimpl.h
+++ b/source/libs/executor/inc/executorimpl.h
@@ -160,7 +160,7 @@ struct SOperatorInfo;
 //struct SOptrBasicInfo;
 
 typedef int32_t (*__optr_encode_fn_t)(struct SOperatorInfo* pOperator, char** result, int32_t* length);
-typedef int32_t (*__optr_decode_fn_t)(struct SOperatorInfo* pOperator, char* result, int32_t length);
+typedef int32_t (*__optr_decode_fn_t)(struct SOperatorInfo* pOperator, char* result);
 
 typedef int32_t (*__optr_open_fn_t)(struct SOperatorInfo* pOptr);
 typedef SSDataBlock* (*__optr_fn_t)(struct SOperatorInfo* pOptr);
@@ -821,7 +821,7 @@ int32_t createExecTaskInfoImpl(SSubplan* pPlan, SExecTaskInfo** pTaskInfo, SRead
 int32_t getOperatorExplainExecInfo(SOperatorInfo* operatorInfo, SExplainExecInfo** pRes, int32_t* capacity,
                                    int32_t* resNum);
 
-int32_t aggDecodeResultRow(SOperatorInfo* pOperator, char* result, int32_t length);
+int32_t aggDecodeResultRow(SOperatorInfo* pOperator, char* result);
 int32_t aggEncodeResultRow(SOperatorInfo* pOperator, char** result, int32_t* length);
 
 STimeWindow getActiveTimeWindow(SDiskbasedBuf* pBuf, SResultRowInfo* pResultRowInfo, int64_t ts,
diff --git a/source/libs/executor/src/executorimpl.c b/source/libs/executor/src/executorimpl.c
index ce46573830e8b1a25a1893191710166e78a6a89d..29047d294f146f577843b8306f25ba875368f20f 100644
--- a/source/libs/executor/src/executorimpl.c
+++ b/source/libs/executor/src/executorimpl.c
@@ -3448,14 +3448,14 @@ static int32_t doOpenAggregateOptr(SOperatorInfo* pOperator) {
     }
 
 #if 0  // test for encode/decode result info
-    if(pOperator->encodeResultRow){
+    if(pOperator->fpSet.encodeResultRow){
       char *result = NULL;
       int32_t length = 0;
-      SAggSupporter   *pSup = &pAggInfo->aggSup;
-      pOperator->encodeResultRow(pOperator, pSup, pInfo, &result, &length);
+      pOperator->fpSet.encodeResultRow(pOperator, &result, &length);
+      SAggSupporter* pSup = &pAggInfo->aggSup;
       taosHashClear(pSup->pResultRowHashTable);
       pInfo->resultRowInfo.size = 0;
-      pOperator->decodeResultRow(pOperator, pSup, pInfo, result, length);
+      pOperator->fpSet.decodeResultRow(pOperator, result);
       if(result){
         taosMemoryFree(result);
       }
@@ -3567,17 +3567,20 @@ int32_t aggEncodeResultRow(SOperatorInfo* pOperator, char** result, int32_t* len
   return TDB_CODE_SUCCESS;
 }
 
-int32_t aggDecodeResultRow(SOperatorInfo* pOperator, char* result, int32_t length) {
-  if(result == NULL || length <= 0){
+int32_t aggDecodeResultRow(SOperatorInfo* pOperator, char* result) {
+  if(result == NULL){
     return TSDB_CODE_TSC_INVALID_INPUT;
   }
   SOptrBasicInfo* pInfo = (SOptrBasicInfo*)(pOperator->info);
   SAggSupporter* pSup = (SAggSupporter*)POINTER_SHIFT(pOperator->info, sizeof(SOptrBasicInfo));
 
   //  int32_t size = taosHashGetSize(pSup->pResultRowHashTable);
-  int32_t count = *(int32_t*)(result);
-
+  int32_t length = *(int32_t*)(result);
   int32_t offset = sizeof(int32_t);
+
+  int32_t count = *(int32_t*)(result + offset);
+  offset += sizeof(int32_t);
+
   while (count-- > 0 && length > offset) {
     int32_t keyLen = *(int32_t*)(result + offset);
     offset += sizeof(int32_t);
@@ -5048,17 +5051,19 @@ int32_t encodeOperator(SOperatorInfo* ops, char** result, int32_t *length){
 int32_t decodeOperator(SOperatorInfo* ops, char* result, int32_t length){
   int32_t code = TDB_CODE_SUCCESS;
   if(ops->fpSet.decodeResultRow){
-    if(result == NULL || length <= 0){
+    if(result == NULL){
       return TSDB_CODE_TSC_INVALID_INPUT;
     }
-    char* data = result + 2 * sizeof(int32_t);
-    int32_t dataLength = *(int32_t*)(result + sizeof(int32_t));
-    code = ops->fpSet.decodeResultRow(ops, data, dataLength - sizeof(int32_t));
+    ASSERT(length == *(int32_t*)result);
+    char* data = result + sizeof(int32_t);
+    code = ops->fpSet.decodeResultRow(ops, data);
     if(code != TDB_CODE_SUCCESS){
       return code;
     }
 
     int32_t totalLength = *(int32_t*)result;
+    int32_t dataLength = *(int32_t*)data;
+
     if(totalLength == dataLength + sizeof(int32_t)) { // the last data
       result = NULL;
       length = 0;
diff --git a/source/libs/executor/src/groupoperator.c b/source/libs/executor/src/groupoperator.c
index ef770e8afc2b5f657187682cc9adf33235dedf48..d388b802f3ae22c7c0cf135c9eb70111be1d79a4 100644
--- a/source/libs/executor/src/groupoperator.c
+++ b/source/libs/executor/src/groupoperator.c
@@ -318,7 +318,20 @@ static SSDataBlock* hashGroupbyAggregate(SOperatorInfo* pOperator) {
   //    updateNumOfRowsInResultRows(pInfo->binfo.pCtx, pOperator->numOfExprs, &pInfo->binfo.resultRowInfo,
   //    pInfo->binfo.rowCellInfoOffset);
   //  }
-
+#if 0
+  if(pOperator->fpSet.encodeResultRow){
+    char *result = NULL;
+    int32_t length = 0;
+    pOperator->fpSet.encodeResultRow(pOperator, &result, &length);
+    SAggSupporter* pSup = &pInfo->aggSup;
+    taosHashClear(pSup->pResultRowHashTable);
+    pInfo->binfo.resultRowInfo.size = 0;
+    pOperator->fpSet.decodeResultRow(pOperator, result);
+    if(result){
+      taosMemoryFree(result);
+    }
+  }
+#endif
   blockDataEnsureCapacity(pRes, pOperator->resultInfo.capacity);
   initGroupedResultInfo(&pInfo->groupResInfo, pInfo->aggSup.pResultRowHashTable, 0);
 
diff --git a/source/libs/executor/src/timewindowoperator.c b/source/libs/executor/src/timewindowoperator.c
index 829968d37f9a8a97cf1f256b493035ad0129f71a..9b8c2f75bab32f37e6d7dd8719e50e6a77c8bca6 100644
--- a/source/libs/executor/src/timewindowoperator.c
+++ b/source/libs/executor/src/timewindowoperator.c
@@ -880,14 +880,14 @@ static int32_t doOpenIntervalAgg(SOperatorInfo* pOperator) {
     hashIntervalAgg(pOperator, &pInfo->binfo.resultRowInfo, pBlock, pBlock->info.groupId, NULL);
 
 #if 0  // test for encode/decode result info
-    if(pOperator->encodeResultRow){
+    if(pOperator->fpSet.encodeResultRow){
       char *result = NULL;
       int32_t length = 0;
       SAggSupporter   *pSup = &pInfo->aggSup;
-      pOperator->encodeResultRow(pOperator, pSup, &pInfo->binfo, &result, &length);
+      pOperator->fpSet.encodeResultRow(pOperator, &result, &length);
       taosHashClear(pSup->pResultRowHashTable);
       pInfo->binfo.resultRowInfo.size = 0;
-      pOperator->decodeResultRow(pOperator, pSup, &pInfo->binfo, result, length);
+      pOperator->fpSet.decodeResultRow(pOperator, result);
       if(result){
         taosMemoryFree(result);
       }