diff --git a/source/dnode/vnode/src/tsdb/tsdbUtil.c b/source/dnode/vnode/src/tsdb/tsdbUtil.c
index 6db9d5e6f40c5d35e52d90dd86b28f4cb7a94676..cfb04881e627fecb750d3ef434740760fab51cfc 100644
--- a/source/dnode/vnode/src/tsdb/tsdbUtil.c
+++ b/source/dnode/vnode/src/tsdb/tsdbUtil.c
@@ -2039,7 +2039,7 @@ int32_t tsdbCmprColData(SColData *pColData, int8_t cmprAlg, SBlockCol *pBlockCol
   size += pBlockCol->szOffset;
 
   // value
-  if (pColData->flag != (HAS_NULL | HAS_NONE)) {
+  if ((pColData->flag != (HAS_NULL | HAS_NONE)) && pColData->nData) {
     code = tsdbCmprData((uint8_t *)pColData->pData, pColData->nData, pColData->type, cmprAlg, ppOut, nOut + size,
                         &pBlockCol->szValue, ppBuf);
     if (code) goto _exit;