diff --git a/src/query/inc/qTsbuf.h b/src/query/inc/qTsbuf.h
index 90bd64336fdeed91deb68b9b490224a7fb29bc80..5d055782c9b82a1444c97a62d429cc2ba9a53986 100644
--- a/src/query/inc/qTsbuf.h
+++ b/src/query/inc/qTsbuf.h
@@ -88,6 +88,7 @@ typedef struct STSBuf {
   STSList   tsData;  // uncompressed raw ts data
   uint64_t  numOfTotal;
   bool      autoDelete;
+  bool      remainOpen;
   int32_t   tsOrder;  // order of timestamp in ts comp buffer
   STSCursor cur;
 } STSBuf;
diff --git a/src/query/src/qAggMain.c b/src/query/src/qAggMain.c
index 2997d56326b664488a1942df0150343bb5b0f6f9..4b4c8b1426e027b508af846fbfe3914989ce7c0d 100644
--- a/src/query/src/qAggMain.c
+++ b/src/query/src/qAggMain.c
@@ -3836,8 +3836,10 @@ static void ts_comp_finalize(SQLFunctionCtx *pCtx) {
   STSBuf *     pTSbuf = pInfo->pTSBuf;
   
   tsBufFlush(pTSbuf);
-  strcpy(pCtx->aOutputBuf, pTSbuf->path);
   
+  *(FILE **)pCtx->aOutputBuf = pTSbuf->f;
+
+  pTSbuf->remainOpen = true;
   tsBufDestroy(pTSbuf);
   doFinalizer(pCtx);
 }
diff --git a/src/query/src/qExecutor.c b/src/query/src/qExecutor.c
index 9d96d31cec55281703bfbda8bceeb95de0c11dd5..fc7b3bdd6d115920a8ab693b38b6ff56af54e326 100644
--- a/src/query/src/qExecutor.c
+++ b/src/query/src/qExecutor.c
@@ -2010,6 +2010,7 @@ static void doFreeQueryHandle(SQInfo* pQInfo) {
   assert(pMemRef->ref == 0 && pMemRef->imem == NULL && pMemRef->mem == NULL);
 }
 
+
 static void teardownQueryRuntimeEnv(SQueryRuntimeEnv *pRuntimeEnv) {
   if (pRuntimeEnv->pQuery == NULL) {
     return;
@@ -2021,6 +2022,16 @@ static void teardownQueryRuntimeEnv(SQueryRuntimeEnv *pRuntimeEnv) {
   qDebug("QInfo:%p teardown runtime env", pQInfo);
   cleanupResultRowInfo(&pRuntimeEnv->windowResInfo);
 
+  if (isTSCompQuery(pQuery)) {
+    FILE *f = *(FILE **)pQuery->sdata[0]->data;
+
+    if (f) {
+      fclose(f);
+      *(FILE **)pQuery->sdata[0]->data = NULL;
+    }
+  }
+
+
   if (pRuntimeEnv->pCtx != NULL) {
     for (int32_t i = 0; i < pQuery->numOfOutput; ++i) {
       SQLFunctionCtx *pCtx = &pRuntimeEnv->pCtx[i];
@@ -6949,10 +6960,10 @@ static size_t getResultSize(SQInfo *pQInfo, int64_t *numOfRows) {
    * TODO handle the case that the file is too large to send back one time
    */
   if (isTSCompQuery(pQuery) && (*numOfRows) > 0) {
-    struct stat fstat;
-    if (stat(pQuery->sdata[0]->data, &fstat) == 0) {
-      *numOfRows = fstat.st_size;
-      return fstat.st_size;
+    struct stat fStat;
+    if (fstat(fileno(*(FILE **)pQuery->sdata[0]->data), &fStat) == 0) {
+      *numOfRows = fStat.st_size;
+      return fStat.st_size;
     } else {
       qError("QInfo:%p failed to get file info, path:%s, reason:%s", pQInfo, pQuery->sdata[0]->data, strerror(errno));
       return 0;
@@ -6968,15 +6979,16 @@ static int32_t doDumpQueryResult(SQInfo *pQInfo, char *data) {
 
   // load data from file to msg buffer
   if (isTSCompQuery(pQuery)) {
-    int32_t fd = open(pQuery->sdata[0]->data, O_RDONLY, 0666);
+
+    FILE *f = *(FILE **)pQuery->sdata[0]->data;
 
     // make sure file exist
-    if (FD_VALID(fd)) {
-      uint64_t s = lseek(fd, 0, SEEK_END);
+    if (f) {
+      off_t s = lseek(fileno(f), 0, SEEK_END);
 
-      qDebug("QInfo:%p ts comp data return, file:%s, size:%"PRId64, pQInfo, pQuery->sdata[0]->data, s);
-      if (lseek(fd, 0, SEEK_SET) >= 0) {
-        size_t sz = read(fd, data, (uint32_t) s);
+      qDebug("QInfo:%p ts comp data return, file:%p, size:%"PRId64, pQInfo, f, s);
+      if (fseek(f, 0, SEEK_SET) >= 0) {
+        size_t sz = fread(data, 1, s, f);
         if(sz < s) {  // todo handle error
           assert(0);
         }
@@ -6984,15 +6996,8 @@ static int32_t doDumpQueryResult(SQInfo *pQInfo, char *data) {
         UNUSED(s);
       }
 
-      close(fd);
-      unlink(pQuery->sdata[0]->data);
-    } else {
-      // todo return the error code to client and handle invalid fd
-      qError("QInfo:%p failed to open tmp file to send ts-comp data to client, path:%s, reason:%s", pQInfo,
-             pQuery->sdata[0]->data, strerror(errno));
-      if (fd != -1) {
-        close(fd);
-      }
+      fclose(f);
+      *(FILE **)pQuery->sdata[0]->data = NULL;
     }
 
     // all data returned, set query over
diff --git a/src/query/src/qTsbuf.c b/src/query/src/qTsbuf.c
index d0c59fe5efe08aa1c9dbe3bbe65db139b074ebee..a5d4690a8e101ccd87985ace36b2abbe1412a2e2 100644
--- a/src/query/src/qTsbuf.c
+++ b/src/query/src/qTsbuf.c
@@ -19,6 +19,8 @@ STSBuf* tsBufCreate(bool autoDelete, int32_t order) {
   if (pTSBuf == NULL) {
     return NULL;
   }
+
+  pTSBuf->autoDelete = autoDelete;
   
   taosGetTmpfilePath("join", pTSBuf->path);
   pTSBuf->f = fopen(pTSBuf->path, "w+");
@@ -26,6 +28,10 @@ STSBuf* tsBufCreate(bool autoDelete, int32_t order) {
     free(pTSBuf);
     return NULL;
   }
+
+  if (!autoDelete) {
+    unlink(pTSBuf->path);
+  }
   
   if (NULL == allocResForTSBuf(pTSBuf)) {
     return NULL;
@@ -37,8 +43,7 @@ STSBuf* tsBufCreate(bool autoDelete, int32_t order) {
   
   tsBufResetPos(pTSBuf);
   pTSBuf->cur.order = TSDB_ORDER_ASC;
-  
-  pTSBuf->autoDelete = autoDelete;
+
   pTSBuf->tsOrder = order;
   
   return pTSBuf;
@@ -49,6 +54,8 @@ STSBuf* tsBufCreateFromFile(const char* path, bool autoDelete) {
   if (pTSBuf == NULL) {
     return NULL;
   }
+
+  pTSBuf->autoDelete = autoDelete;
   
   tstrncpy(pTSBuf->path, path, sizeof(pTSBuf->path));
   
@@ -129,7 +136,6 @@ STSBuf* tsBufCreateFromFile(const char* path, bool autoDelete) {
   
   // ascending by default
   pTSBuf->cur.order = TSDB_ORDER_ASC;
-  pTSBuf->autoDelete = autoDelete;
   
 //  tscDebug("create tsBuf from file:%s, fd:%d, size:%d, numOfGroups:%d, autoDelete:%d", pTSBuf->path, fileno(pTSBuf->f),
 //           pTSBuf->fileSize, pTSBuf->numOfGroups, pTSBuf->autoDelete);
@@ -147,8 +153,10 @@ void* tsBufDestroy(STSBuf* pTSBuf) {
   
   tfree(pTSBuf->pData);
   tfree(pTSBuf->block.payload);
-  
-  fclose(pTSBuf->f);
+
+  if (!pTSBuf->remainOpen) {
+    fclose(pTSBuf->f);
+  }
   
   if (pTSBuf->autoDelete) {
 //    ("tsBuf %p destroyed, delete tmp file:%s", pTSBuf, pTSBuf->path);