diff --git a/src/client/src/tscServer.c b/src/client/src/tscServer.c
index a80839f1a21c6ff6b45d4843b40ffbf461cf2871..e087c17d9d1c84341d0f067944e5ee7e640da9b0 100644
--- a/src/client/src/tscServer.c
+++ b/src/client/src/tscServer.c
@@ -2355,6 +2355,7 @@ int tscProcessRetrieveFuncRsp(SSqlObj* pSql) {
 
   parQueryInfo->pUdfInfo = pQueryInfo->pUdfInfo;   // assigned to parent sql obj.
   pQueryInfo->pUdfInfo = NULL;
+  taosReleaseRef(tscObjRef, parent->self);
   return TSDB_CODE_SUCCESS;
 }