fix bugs

source/libs/function/src/builtins.c

@@ -1243,7 +1243,7 @@ const SBuiltinFuncDefinition funcMgtBuiltins[] = {
     .classification = FUNC_MGT_AGG_FUNC,
     .translateFunc = translateApercentileMerge,
     .getEnvFunc   = getApercentileFuncEnv,
-    .initFunc     = dummyInit,
+    .initFunc     = functionSetup,
     .processFunc  = apercentileFunctionMerge,
     .finalizeFunc = apercentileFinalize
   },

source/libs/function/src/builtinsimpl.c

@@ -2083,7 +2083,7 @@ int32_t apercentileFunctionMerge(SqlFunctionCtx* pCtx) {
   }
 
   pInfo->algo = pInputInfo->algo;
-  if (pInput->algo == APERCT_ALGO_TDIGEST) {
+  if (pInfo->algo == APERCT_ALGO_TDIGEST) {
   } else {
     buildHistogramInfo(pInputInfo);
     if (pInputInfo->pHisto->numOfElems <= 0) {