fix:[TD-31326] Return correct error code in _return.

source/client/src/clientEnv.c

@@ -871,7 +871,7 @@ _return:
     TSC_ERR_RET(terrno);
   }
 
-  return TSDB_CODE_SUCCESS;
+  return code;
 }
 
 void tscStopCrashReport() {

source/client/src/clientHb.c

@@ -1405,7 +1405,7 @@ _return:
     TSC_ERR_RET(terrno);
   }
 
-  return TSDB_CODE_SUCCESS;
+  return code;
 }
 
 static void hbStopThread() {

source/libs/scalar/src/filter.c

@@ -2343,7 +2343,7 @@ _return:
 
   (void)filterFreeRangeCtx(ctx);  // No need to handle the return value.
 
-  return TSDB_CODE_SUCCESS;
+  return code;
 }
 
 int32_t filterMergeGroupUnits(SFilterInfo *info, SFilterGroupCtx **gRes, int32_t *gResNum) {
@@ -2671,7 +2671,7 @@ _return:
 
   (void)filterFreeRangeCtx(ctx);  // No need to handle the return value.
 
-  return TSDB_CODE_SUCCESS;
+  return code;
 }
 
 int32_t filterMergeGroups(SFilterInfo *info, SFilterGroupCtx **gRes, int32_t *gResNum) {
@@ -2758,7 +2758,7 @@ _return:
 
   FILTER_SET_FLAG(info->status, FI_STATUS_ALL);
 
-  return TSDB_CODE_SUCCESS;
+  return code;
 }
 
 int32_t filterConvertGroupFromArray(SFilterInfo *info, SArray *group) {
@@ -2958,7 +2958,7 @@ _return:
   taosMemoryFreeClear(idxNum);
   taosMemoryFreeClear(idxs);
 
-  return TSDB_CODE_SUCCESS;
+  return code;
 }
 
 int32_t filterPostProcessRange(SFilterInfo *info) {
@@ -5003,7 +5003,7 @@ int32_t fltOptimizeNodes(SFilterInfo *pInfo, SNode **pNode, SFltTreeStat *pStat)
   }
 _return:
   taosArrayDestroy(sclOpList);
-  return TSDB_CODE_SUCCESS;
+  return code;
 }
 
 int32_t fltGetDataFromColId(void *param, int32_t id, void **data) {

source/libs/scalar/src/sclfunc.c

@@ -2913,7 +2913,7 @@ int32_t histogramScalarFunction(SScalarParam *pInput, int32_t inputNum, SScalarP
 
 _return:
   taosMemoryFree(bins);
-  return TSDB_CODE_SUCCESS;
+  return code;
 }
 
 int32_t selectScalarFunction(SScalarParam *pInput, int32_t inputNum, SScalarParam *pOutput) {