diff --git a/include/libs/function/taosudf.h b/include/libs/function/taosudf.h
index 5be9c159001ef2c2ce0131e477e1b29806b98e36..ee3d85b43392b0a733815a2b1b9c10f133f3c72d 100644
--- a/include/libs/function/taosudf.h
+++ b/include/libs/function/taosudf.h
@@ -73,7 +73,6 @@ typedef struct SUdfDataBlock {
   SUdfColumn **udfCols;
 } SUdfDataBlock;
 
-// TODO: deprecate SUdfInterBuf.numOfResult
 typedef struct SUdfInterBuf {
   int32_t bufLen;
   char   *buf;
diff --git a/source/libs/function/src/udfd.c b/source/libs/function/src/udfd.c
index ec49c39c0e6a9eaf38bd0aea4585f21636166d24..4e16d5e70853f9c4bf69fb0e48175507944dfaad 100644
--- a/source/libs/function/src/udfd.c
+++ b/source/libs/function/src/udfd.c
@@ -308,8 +308,8 @@ void udfdInitializeCPlugin(SUdfScriptPlugin *plugin) {
   plugin->udfAggMergeFunc = udfdCPluginUdfAggMerge;
   plugin->udfAggFinishFunc = udfdCPluginUdfAggFinish;
 
-  SScriptUdfEnvItem items[0];
-  plugin->openFunc(items, 0);
+  SScriptUdfEnvItem items[1] = {{"LD_LIBRARY_PATH", tsUdfdLdLibPath}};
+  plugin->openFunc(items, 1);
   return;
 }
 
diff --git a/source/libs/function/test/udf2.c b/source/libs/function/test/udf2.c
index e24789d0fb4095f2fdc75d8d1ce3e8dc1355e4c6..faf4daa4e53cacd70cbfd4ff319178c2cdbb8a56 100644
--- a/source/libs/function/test/udf2.c
+++ b/source/libs/function/test/udf2.c
@@ -12,12 +12,15 @@ DLL_EXPORT int32_t udf2_destroy() { return 0; }
 DLL_EXPORT int32_t udf2_start(SUdfInterBuf* buf) {
   *(int64_t*)(buf->buf) = 0;
   buf->bufLen = sizeof(double);
-  buf->numOfResult = 0;
+  buf->numOfResult = 1;
   return 0;
 }
 
 DLL_EXPORT int32_t udf2(SUdfDataBlock* block, SUdfInterBuf* interBuf, SUdfInterBuf* newInterBuf) {
-  double sumSquares = *(double*)interBuf->buf;
+  double sumSquares = 0;
+  if (interBuf->numOfResult == 1) {
+    sumSquares = *(double*)interBuf->buf;
+  }
   int8_t numNotNull = 0;
   for (int32_t i = 0; i < block->numOfCols; ++i) {
     SUdfColumn* col = block->udfCols[i];