fix: array[0] not supported in windows

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;

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;
 }
 

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];