diff --git a/src/query/src/qTsbuf.c b/src/query/src/qTsbuf.c
index d5364da6d7264115a883727283c069b25391dbca..bb124dec06e49be23f3a1572d8a878a694811977 100644
--- a/src/query/src/qTsbuf.c
+++ b/src/query/src/qTsbuf.c
@@ -492,6 +492,10 @@ void tsBufAppend(STSBuf* pTSBuf, int32_t id, tVariant* tag, const char* pData, i
 }
 
 void tsBufFlush(STSBuf* pTSBuf) {
+  if (pTSBuf->numOfGroups <= 0) {
+    return;
+  }
+
   writeDataToDisk(pTSBuf);
   shrinkBuffer(&pTSBuf->tsData);