diff --git a/src/client/src/tscSubquery.c b/src/client/src/tscSubquery.c
index de0d899f8c..5139f7bd80 100644
--- a/src/client/src/tscSubquery.c
+++ b/src/client/src/tscSubquery.c
@@ -2366,7 +2366,7 @@ void tscBuildResFromSubqueries(SSqlObj *pSql) {
     SQueryInfo* pQueryInfo = tscGetQueryInfoDetail(&pSql->cmd, pSql->cmd.clauseIndex);
 
     size_t numOfExprs = tscSqlExprNumOfExprs(pQueryInfo);
-    pRes->numOfCols =  (int32_t)numOfExprs;
+    pRes->numOfCols =  (int16_t)numOfExprs;
 
     pRes->tsrow  = calloc(numOfExprs, POINTER_BYTES);
     pRes->buffer = calloc(numOfExprs, POINTER_BYTES);
diff --git a/src/os/src/windows/wAtomic.c b/src/os/src/windows/wAtomic.c
index a025cb8f0e..b645893030 100644
--- a/src/os/src/windows/wAtomic.c
+++ b/src/os/src/windows/wAtomic.c
@@ -44,7 +44,7 @@ long interlocked_add_fetch_32(long volatile* ptr, long val) {
 
 __int64 interlocked_add_fetch_64(__int64 volatile* ptr, __int64 val) {
 //#ifdef _WIN64
-  return _InterlockedExchangeAdd64(ptr, val) + val;
+  return InterlockedExchangeAdd64(ptr, val) + val;
 //#else
 //  return _InterlockedExchangeAdd(ptr, val) + val;
 //#endif
diff --git a/src/os/src/windows/wFile.c b/src/os/src/windows/wFile.c
index 734ed9916d..2204135ae6 100644
--- a/src/os/src/windows/wFile.c
+++ b/src/os/src/windows/wFile.c
@@ -65,12 +65,12 @@ int64_t taosFSendFile(FILE *out_file, FILE *in_file, int64_t *offset, int64_t co
 
   int64_t remain = count - writeLen;
   if (remain > 0) {
-    size_t rlen = fread(buffer, 1, remain, in_file);
+    size_t rlen = fread(buffer, 1, (size_t) remain, in_file);
     if (rlen <= 0) {
       return writeLen;
     }
     else {
-      fwrite(buffer, 1, remain, out_file);
+      fwrite(buffer, 1, (size_t) remain, out_file);
       writeLen += remain;
     }
   }