diff --git a/source/libs/function/inc/builtinsimpl.h b/source/libs/function/inc/builtinsimpl.h
index 0da0081cb008b85dda0da1ee6a4510458c639ab2..acf4a5e4affe45ad99033b45b351e5d7192a9e71 100644
--- a/source/libs/function/inc/builtinsimpl.h
+++ b/source/libs/function/inc/builtinsimpl.h
@@ -106,7 +106,7 @@ int32_t topBotFinalize(SqlFunctionCtx* pCtx, SSDataBlock* pBlock);
 int32_t topBotPartialFinalize(SqlFunctionCtx* pCtx, SSDataBlock* pBlock);
 int32_t topCombine(SqlFunctionCtx* pDestCtx, SqlFunctionCtx* pSourceCtx);
 int32_t bottomCombine(SqlFunctionCtx* pDestCtx, SqlFunctionCtx* pSourceCtx);
-int32_t getTopBotInfoSize();
+int32_t getTopBotInfoSize(int64_t numOfItems);
 
 bool getSpreadFuncEnv(struct SFunctionNode* pFunc, SFuncExecEnv* pEnv);
 bool spreadFunctionSetup(SqlFunctionCtx *pCtx, SResultRowEntryInfo* pResultInfo);
diff --git a/source/libs/function/src/builtins.c b/source/libs/function/src/builtins.c
index 74efe6a06c778659c897a9d622219b20560e9521..d1110d7da5083265d2a3f42dd2ca9aa64355222e 100644
--- a/source/libs/function/src/builtins.c
+++ b/source/libs/function/src/builtins.c
@@ -392,14 +392,14 @@ static int32_t translateTopBotImpl(SFunctionNode* pFunc, char* pErrBuf, int32_t
     pValue->notReserved = true;
 
     // set result type
-    pFunc->node.resType = (SDataType){.bytes = getTopBotInfoSize() + VARSTR_HEADER_SIZE, .type = TSDB_DATA_TYPE_BINARY};
+    pFunc->node.resType = (SDataType){.bytes = getTopBotInfoSize(pValue->datum.i) + VARSTR_HEADER_SIZE, .type = TSDB_DATA_TYPE_BINARY};
   } else {
     if (1 != numOfParams) {
       return invaildFuncParaNumErrMsg(pErrBuf, len, pFunc->functionName);
     }
 
     uint8_t para1Type = ((SExprNode*)nodesListGetNode(pFunc->pParameterList, 0))->resType.type;
-    if (TSDB_DATA_TYPE_BINARY == para1Type) {
+    if (TSDB_DATA_TYPE_BINARY != para1Type) {
       return invaildFuncParaTypeErrMsg(pErrBuf, len, pFunc->functionName);
     }
 
diff --git a/source/libs/function/src/builtinsimpl.c b/source/libs/function/src/builtinsimpl.c
index 76a9b79605910a1852de5a7bf49b4b9743187bb5..8662f894575bcf1304f7a7699be91d4c9a4d705b 100644
--- a/source/libs/function/src/builtinsimpl.c
+++ b/source/libs/function/src/builtinsimpl.c
@@ -2651,8 +2651,8 @@ int32_t diffFunction(SqlFunctionCtx* pCtx) {
   return numOfElems;
 }
 
-int32_t getTopBotInfoSize() {
-  return (int32_t)sizeof(STopBotRes);
+int32_t getTopBotInfoSize(int64_t numOfItems) {
+  return sizeof(STopBotRes) + numOfItems * sizeof(STopBotResItem);
 }
 
 bool getTopBotFuncEnv(SFunctionNode* pFunc, SFuncExecEnv* pEnv) {
@@ -2933,7 +2933,7 @@ int32_t topBotFinalize(SqlFunctionCtx* pCtx, SSDataBlock* pBlock) {
 int32_t topBotPartialFinalize(SqlFunctionCtx* pCtx, SSDataBlock* pBlock) {
   SResultRowEntryInfo* pEntryInfo = GET_RES_INFO(pCtx);
   STopBotRes* pRes = GET_ROWCELL_INTERBUF(GET_RES_INFO(pCtx));
-  int32_t resultBytes = getTopBotInfoSize();
+  int32_t resultBytes = getTopBotInfoSize(pRes->maxSize);
   char *res = taosMemoryCalloc(resultBytes + VARSTR_HEADER_SIZE, sizeof(char));
 
   memcpy(varDataVal(res), pRes, resultBytes);