fix bugs

source/libs/function/src/builtins.c

@@ -1463,7 +1463,7 @@ const SBuiltinFuncDefinition funcMgtBuiltins[] = {
     .classification = FUNC_MGT_AGG_FUNC,
     .translateFunc = translateHistogramMerge,
     .getEnvFunc   = getHistogramFuncEnv,
-    .initFunc     = histogramFunctionSetup,
+    .initFunc     = functionSetup,
     .processFunc  = histogramFunctionMerge,
     .finalizeFunc = histogramFinalize
   },

source/libs/function/src/builtinsimpl.c

@@ -3345,11 +3345,12 @@ int32_t histogramFunctionMerge(SqlFunctionCtx *pCtx) {
   pInfo->numOfBins  = pInputInfo->numOfBins;
   pInfo->totalCount += pInputInfo->totalCount;
   for (int32_t k = 0; k < pInfo->numOfBins; ++k) {
+    pInfo->bins[k].lower = pInputInfo->bins[k].lower;
+    pInfo->bins[k].upper = pInputInfo->bins[k].upper;
     pInfo->bins[k].count += pInputInfo->bins[k].count;
   }
 
-  SET_VAL(GET_RES_INFO(pCtx), 1, 1);
-
+  SET_VAL(GET_RES_INFO(pCtx), pInfo->numOfBins, pInfo->numOfBins);
   return TSDB_CODE_SUCCESS;
 }
 
@@ -3404,7 +3405,7 @@ int32_t histogramPartialFinalize(SqlFunctionCtx* pCtx, SSDataBlock* pBlock) {
   colDataAppend(pCol, pBlock->info.rows, res, false);
 
   taosMemoryFree(res);
-  return pResInfo->numOfRes;
+  return 1;
 }
 
 bool getHLLFuncEnv(SFunctionNode* UNUSED_PARAM(pFunc), SFuncExecEnv* pEnv) {