diff --git a/include/common/tmsg.h b/include/common/tmsg.h
index 382a17b859..77455cffd1 100644
--- a/include/common/tmsg.h
+++ b/include/common/tmsg.h
@@ -1473,10 +1473,12 @@ typedef struct {
 typedef struct {
   float      xFilesFactor;
   int32_t    delay;
-  int8_t     nFuncIds;
+  int32_t    qmsg1Len;
+  int32_t    qmsg2Len;
   func_id_t* pFuncIds;
   char*      qmsg1;  // not null: pAst1:qmsg1:SRetention1 => trigger aggr task1
   char*      qmsg2;  // not null: pAst2:qmsg2:SRetention2 => trigger aggr task2
+  int8_t     nFuncIds;
 } SRSmaParam;
 
 typedef struct SVCreateTbReq {
diff --git a/source/common/src/tmsg.c b/source/common/src/tmsg.c
index f3e8601cd1..ae8f669311 100644
--- a/source/common/src/tmsg.c
+++ b/source/common/src/tmsg.c
@@ -434,8 +434,15 @@ int32_t tSerializeSVCreateTbReq(void **buf, SVCreateTbReq *pReq) {
         for (int8_t i = 0; i < param->nFuncIds; ++i) {
           tlen += taosEncodeFixedI32(buf, param->pFuncIds[i]);
         }
-        tlen += taosEncodeString(buf, param->qmsg1);
-        tlen += taosEncodeString(buf, param->qmsg2);
+        tlen += taosEncodeFixedI32(buf, param->qmsg1Len);
+        if (param->qmsg1Len > 0) {
+          tlen += taosEncodeString(buf, param->qmsg1);
+        }
+
+        tlen += taosEncodeFixedI32(buf, param->qmsg2Len);
+        if (param->qmsg2Len > 0) {
+          tlen += taosEncodeString(buf, param->qmsg2);
+        }
       }
       break;
     case TD_CHILD_TABLE:
@@ -509,8 +516,15 @@ void *tDeserializeSVCreateTbReq(void *buf, SVCreateTbReq *pReq) {
             buf = taosDecodeFixedI32(buf, param->pFuncIds + i);
           }
         }
-        buf = taosDecodeString(buf, &param->qmsg1);
-        buf = taosDecodeString(buf, &param->qmsg2);
+        buf = taosDecodeFixedI32(buf, &param->qmsg1Len);
+        if (param->qmsg1Len > 0) {
+          buf = taosDecodeString(buf, &param->qmsg1);
+        }
+
+        buf = taosDecodeFixedI32(buf, &param->qmsg2Len);
+        if (param->qmsg2Len > 0) {
+          buf = taosDecodeString(buf, &param->qmsg2);
+        }
       } else {
         pReq->stbCfg.pRSmaParam = NULL;
       }
diff --git a/source/dnode/mnode/impl/src/mndStb.c b/source/dnode/mnode/impl/src/mndStb.c
index 668793badb..f304e3153d 100644
--- a/source/dnode/mnode/impl/src/mndStb.c
+++ b/source/dnode/mnode/impl/src/mndStb.c
@@ -20,6 +20,7 @@
 #include "mndInfoSchema.h"
 #include "mndMnode.h"
 #include "mndPerfSchema.h"
+#include "mndScheduler.h"
 #include "mndShow.h"
 #include "mndTrans.h"
 #include "mndUser.h"
@@ -444,14 +445,24 @@ static void *mndBuildVCreateStbReq(SMnode *pMnode, SVgObj *pVgroup, SStbObj *pSt
       *(pRSmaParam->pFuncIds + f) = pStb->aggregationMethod;
     }
     if (pStb->ast1Len > 0) {
-      pRSmaParam->qmsg1 = strdup(pStb->pAst1);
+      if (mndConvertRSmaTask(pStb->pAst1, 0, 0, &pRSmaParam->qmsg1, &pRSmaParam->qmsg1Len) != TSDB_CODE_SUCCESS) {
+        taosMemoryFreeClear(pRSmaParam->pFuncIds);
+        taosMemoryFreeClear(req.stbCfg.pRSmaParam);
+        taosMemoryFreeClear(req.stbCfg.pSchema);
+        return NULL;
+      }
     }
     if (pStb->ast2Len > 0) {
-      pRSmaParam->qmsg2 = strdup(pStb->pAst2);
+      int32_t qmsgLen2 = 0;
+      if (mndConvertRSmaTask(pStb->pAst2, 0, 0, &pRSmaParam->qmsg2, &pRSmaParam->qmsg2Len) != TSDB_CODE_SUCCESS) {
+        taosMemoryFreeClear(pRSmaParam->pFuncIds);
+        taosMemoryFreeClear(pRSmaParam->qmsg1);
+        taosMemoryFreeClear(req.stbCfg.pRSmaParam);
+        taosMemoryFreeClear(req.stbCfg.pSchema);
+        return NULL;
+      }
     }
 
-    TASSERT(pRSmaParam->qmsg1 && pRSmaParam->qmsg2);
-
     req.stbCfg.pRSmaParam = pRSmaParam;
   }
 
diff --git a/source/dnode/vnode/src/vnd/vnodeSvr.c b/source/dnode/vnode/src/vnd/vnodeSvr.c
index 1b50bf8c60..1c3a3787f3 100644
--- a/source/dnode/vnode/src/vnd/vnodeSvr.c
+++ b/source/dnode/vnode/src/vnd/vnodeSvr.c
@@ -215,12 +215,13 @@ static int vnodeProcessCreateStbReq(SVnode *pVnode, void *pReq) {
     return -1;
   }
 
-  // TODO: remove the log
-  if (vCreateTbReq.stbCfg.pRSmaParam) {
-    printf("qmsg1 len = %d, body = %s\n", (int32_t)strlen(vCreateTbReq.stbCfg.pRSmaParam->qmsg1),
-           vCreateTbReq.stbCfg.pRSmaParam->qmsg1);
-    printf("qmsg2 len = %d, body = %s\n", (int32_t)strlen(vCreateTbReq.stbCfg.pRSmaParam->qmsg2),
-           vCreateTbReq.stbCfg.pRSmaParam->qmsg2);
+  // TODO: remove the debug log
+  SRSmaParam *param = vCreateTbReq.stbCfg.pRSmaParam;
+  if (param) {
+    printf("qmsg1 len = %d, body = %s\n", param->qmsg1 ? (int32_t)strlen(param->qmsg1) : 0,
+           param->qmsg1 ? param->qmsg1 : "");
+    printf("qmsg1 len = %d, body = %s\n", param->qmsg2 ? (int32_t)strlen(param->qmsg2) : 0,
+           param->qmsg2 ? param->qmsg2 : "");
   }
 
   taosMemoryFree(vCreateTbReq.stbCfg.pSchema);