feat(query): add mavg scalar version

include/libs/scalar/scalar.h

@@ -110,6 +110,7 @@ int32_t spreadScalarFunction(SScalarParam *pInput, int32_t inputNum, SScalarPara
 int32_t derivativeScalarFunction(SScalarParam *pInput, int32_t inputNum, SScalarParam *pOutput);
 int32_t irateScalarFunction(SScalarParam *pInput, int32_t inputNum, SScalarParam *pOutput);
 int32_t twaScalarFunction(SScalarParam *pInput, int32_t inputNum, SScalarParam *pOutput);
+int32_t mavgScalarFunction(SScalarParam *pInput, int32_t inputNum, SScalarParam *pOutput);
 
 #ifdef __cplusplus
 }

source/libs/function/src/builtins.c

@@ -2447,6 +2447,7 @@ const SBuiltinFuncDefinition funcMgtBuiltins[] = {
     .getEnvFunc   = getMavgFuncEnv,
     .initFunc     = mavgFunctionSetup,
     .processFunc  = mavgFunction,
+    .sprocessFunc = mavgScalarFunction,
     .finalizeFunc = NULL
   },
   {

source/libs/scalar/src/sclfunc.c

@@ -2417,3 +2417,7 @@ int32_t irateScalarFunction(SScalarParam *pInput, int32_t inputNum, SScalarParam
 int32_t twaScalarFunction(SScalarParam *pInput, int32_t inputNum, SScalarParam *pOutput) {
   return avgScalarFunction(pInput, inputNum, pOutput);
 }
+
+int32_t mavgScalarFunction(SScalarParam *pInput, int32_t inputNum, SScalarParam *pOutput) {
+  return avgScalarFunction(pInput, inputNum, pOutput);
+}