diff --git a/source/libs/function/inc/builtinsimpl.h b/source/libs/function/inc/builtinsimpl.h
index dfdf03a5a8700b2b97a23f9006763e1cfa088d2d..89e9673b066b0a7353f36414c78e4c4de7d78bfa 100644
--- a/source/libs/function/inc/builtinsimpl.h
+++ b/source/libs/function/inc/builtinsimpl.h
@@ -23,11 +23,6 @@ extern "C" {
 #include "function.h"
 #include "functionMgt.h"
 
-bool    dummyGetEnv(SFunctionNode* UNUSED_PARAM(pFunc), SFuncExecEnv* UNUSED_PARAM(pEnv));
-bool    dummyInit(SqlFunctionCtx* UNUSED_PARAM(pCtx), SResultRowEntryInfo* UNUSED_PARAM(pResultInfo));
-int32_t dummyProcess(SqlFunctionCtx* UNUSED_PARAM(pCtx));
-int32_t dummyFinalize(SqlFunctionCtx* UNUSED_PARAM(pCtx), SSDataBlock* UNUSED_PARAM(pBlock));
-
 bool    functionSetup(SqlFunctionCtx* pCtx, SResultRowEntryInfo* pResultInfo);
 int32_t functionFinalize(SqlFunctionCtx* pCtx, SSDataBlock* pBlock);
 int32_t functionFinalizeWithResultBuf(SqlFunctionCtx* pCtx, SSDataBlock* pBlock, char* finalResult);
diff --git a/source/libs/function/src/builtins.c b/source/libs/function/src/builtins.c
index 96a14be4ccec2658d2755648251df8959a859062..d86c500ae7a383ab849c55dd07c5b07f61f18cdc 100644
--- a/source/libs/function/src/builtins.c
+++ b/source/libs/function/src/builtins.c
@@ -1513,7 +1513,8 @@ static int32_t translateInterp(SFunctionNode* pFunc, char* pErrBuf, int32_t len)
   int32_t numOfParams = LIST_LENGTH(pFunc->pParameterList);
   uint8_t dbPrec = pFunc->node.resType.precision;
 
-  if (1 != numOfParams && 3 != numOfParams && 4 != numOfParams) {
+  //if (1 != numOfParams && 3 != numOfParams && 4 != numOfParams) {
+  if (1 != numOfParams) {
     return invaildFuncParaNumErrMsg(pErrBuf, len, pFunc->functionName);
   }
 
@@ -1523,6 +1524,7 @@ static int32_t translateInterp(SFunctionNode* pFunc, char* pErrBuf, int32_t len)
     return invaildFuncParaTypeErrMsg(pErrBuf, len, pFunc->functionName);
   }
 
+#if 0
   if (3 <= numOfParams) {
     int64_t timeVal[2] = {0};
     for (int32_t i = 1; i < 3; ++i) {
@@ -1561,6 +1563,7 @@ static int32_t translateInterp(SFunctionNode* pFunc, char* pErrBuf, int32_t len)
           "INTERP function time interval parameter should be one of the following: [1b, 1u, 1a, 1s, 1m, 1h, 1d, 1w]");
     }
   }
+#endif
 
   pFunc->node.resType = ((SExprNode*)nodesListGetNode(pFunc->pParameterList, 0))->resType;
   return TSDB_CODE_SUCCESS;
@@ -2001,11 +2004,6 @@ static int32_t translateBlockDistInfoFunc(SFunctionNode* pFunc, char* pErrBuf, i
   return TSDB_CODE_SUCCESS;
 }
 
-static int32_t translateGroupKeyFunc(SFunctionNode* pFunc, char* pErrBuf, int32_t len) {
-  pFunc->node.resType = ((SExprNode*)nodesListGetNode(pFunc->pParameterList, 0))->resType;
-  return TSDB_CODE_SUCCESS;
-}
-
 static bool getBlockDistFuncEnv(SFunctionNode* UNUSED_PARAM(pFunc), SFuncExecEnv* pEnv) {
   pEnv->calcMemSize = sizeof(STableBlockDistInfo);
   return true;
@@ -2350,6 +2348,8 @@ const SBuiltinFuncDefinition funcMgtBuiltins[] = {
     .finalizeFunc = elapsedFinalize,
     .invertFunc   = NULL,
     .combineFunc  = elapsedCombine,
+    .pPartialFunc = "_elapsed_partial",
+    .pMergeFunc   = "_elapsed_merge"
   },
   {
     .name = "_elapsed_partial",
diff --git a/source/libs/function/src/builtinsimpl.c b/source/libs/function/src/builtinsimpl.c
index a093fe51165a1279ae0d801dabcbe65903309c99..0c8c5aec4baeca45a165019c93ea6b877b13d932 100644
--- a/source/libs/function/src/builtinsimpl.c
+++ b/source/libs/function/src/builtinsimpl.c
@@ -429,14 +429,6 @@ typedef struct SGroupKeyInfo {
     (_p).val = (_v);                \
   } while (0)
 
-bool dummyGetEnv(SFunctionNode* UNUSED_PARAM(pFunc), SFuncExecEnv* UNUSED_PARAM(pEnv)) { return true; }
-
-bool dummyInit(SqlFunctionCtx* UNUSED_PARAM(pCtx), SResultRowEntryInfo* UNUSED_PARAM(pResultInfo)) { return true; }
-
-int32_t dummyProcess(SqlFunctionCtx* UNUSED_PARAM(pCtx)) { return 0; }
-
-int32_t dummyFinalize(SqlFunctionCtx* UNUSED_PARAM(pCtx), SSDataBlock* UNUSED_PARAM(pBlock)) { return 0; }
-
 bool functionSetup(SqlFunctionCtx* pCtx, SResultRowEntryInfo* pResultInfo) {
   if (pResultInfo->initialized) {
     return false;