diff --git a/include/libs/scalar/scalar.h b/include/libs/scalar/scalar.h
index de7e35b7f8f22dd4dc1050ca954378333a25cb16..770b0442ea5413399b543545369246cf5346875b 100644
--- a/include/libs/scalar/scalar.h
+++ b/include/libs/scalar/scalar.h
@@ -119,6 +119,10 @@ int32_t stateDurationScalarFunction(SScalarParam *pInput, int32_t inputNum, SSca
 int32_t histogramScalarFunction(SScalarParam *pInput, int32_t inputNum, SScalarParam *pOutput);
 int32_t topBotScalarFunction(SScalarParam *pInput, int32_t inputNum, SScalarParam *pOutput);
 int32_t firstLastScalarFunction(SScalarParam *pInput, int32_t inputNum, SScalarParam *pOutput);
+int32_t sampleScalarFunction(SScalarParam *pInput, int32_t inputNum, SScalarParam *pOutput);
+int32_t tailScalarFunction(SScalarParam *pInput, int32_t inputNum, SScalarParam *pOutput);
+int32_t uniqueScalarFunction(SScalarParam *pInput, int32_t inputNum, SScalarParam *pOutput);
+int32_t modeScalarFunction(SScalarParam *pInput, int32_t inputNum, SScalarParam *pOutput);
 
 #ifdef __cplusplus
 }
diff --git a/source/libs/function/src/builtins.c b/source/libs/function/src/builtins.c
index 07154ba8dd2cd095695889c2cd09a079faa3d874..489a11da395a5ffba9e8c552e200286aeccd6f5d 100644
--- a/source/libs/function/src/builtins.c
+++ b/source/libs/function/src/builtins.c
@@ -2469,6 +2469,7 @@ const SBuiltinFuncDefinition funcMgtBuiltins[] = {
     .getEnvFunc   = getSampleFuncEnv,
     .initFunc     = sampleFunctionSetup,
     .processFunc  = sampleFunction,
+    .sprocessFunc = sampleScalarFunction,
     .finalizeFunc = sampleFinalize
   },
   {
@@ -2480,6 +2481,7 @@ const SBuiltinFuncDefinition funcMgtBuiltins[] = {
     .getEnvFunc   = getTailFuncEnv,
     .initFunc     = tailFunctionSetup,
     .processFunc  = tailFunction,
+    .sprocessFunc = tailScalarFunction,
     .finalizeFunc = NULL
   },
   {
@@ -2491,6 +2493,7 @@ const SBuiltinFuncDefinition funcMgtBuiltins[] = {
     .getEnvFunc   = getUniqueFuncEnv,
     .initFunc     = uniqueFunctionSetup,
     .processFunc  = uniqueFunction,
+    .sprocessFunc = uniqueScalarFunction,
     .finalizeFunc = NULL
   },
   {
@@ -2501,6 +2504,7 @@ const SBuiltinFuncDefinition funcMgtBuiltins[] = {
     .getEnvFunc   = getModeFuncEnv,
     .initFunc     = modeFunctionSetup,
     .processFunc  = modeFunction,
+    .sprocessFunc = modeScalarFunction,
     .finalizeFunc = modeFinalize,
   },
   {
diff --git a/source/libs/scalar/src/sclfunc.c b/source/libs/scalar/src/sclfunc.c
index a495020220797337e13ee3e0f8f8f8c93cbbcbfa..55debe51a8d2b1455c8c5fb5e5636649c52ba2b8 100644
--- a/source/libs/scalar/src/sclfunc.c
+++ b/source/libs/scalar/src/sclfunc.c
@@ -2845,3 +2845,19 @@ int32_t topBotScalarFunction(SScalarParam *pInput, int32_t inputNum, SScalarPara
 int32_t firstLastScalarFunction(SScalarParam *pInput, int32_t inputNum, SScalarParam *pOutput) {
   return selectScalarFunction(pInput, inputNum, pOutput);
 }
+
+int32_t sampleScalarFunction(SScalarParam *pInput, int32_t inputNum, SScalarParam *pOutput) {
+  return selectScalarFunction(pInput, inputNum, pOutput);
+}
+
+int32_t tailScalarFunction(SScalarParam *pInput, int32_t inputNum, SScalarParam *pOutput) {
+  return selectScalarFunction(pInput, inputNum, pOutput);
+}
+
+int32_t uniqueScalarFunction(SScalarParam *pInput, int32_t inputNum, SScalarParam *pOutput) {
+  return selectScalarFunction(pInput, inputNum, pOutput);
+}
+
+int32_t modeScalarFunction(SScalarParam *pInput, int32_t inputNum, SScalarParam *pOutput) {
+  return selectScalarFunction(pInput, inputNum, pOutput);
+}