diff --git a/include/libs/catalog/catalog.h b/include/libs/catalog/catalog.h
index b72ccf027f23af2fff93271d51623363782d15d2..83c1c87dcac912aff6eb42874fc6e358786c2c6e 100644
--- a/include/libs/catalog/catalog.h
+++ b/include/libs/catalog/catalog.h
@@ -103,15 +103,28 @@ int32_t catalogUpdateDBVgroup(struct SCatalog* pCatalog, const char* dbName, SDB
  */
 int32_t catalogGetTableMeta(struct SCatalog* pCatalog, void * pTransporter, const SEpSet* pMgmtEps, const SName* pTableName, STableMeta** pTableMeta);
 
+/**
+ * Get a super table's meta data. 
+ * @param pCatalog (input, got with catalogGetHandle)
+ * @param pTransporter (input, rpc object)
+ * @param pMgmtEps (input, mnode EPs)
+ * @param pTableName (input, table name, NOT including db name)
+ * @param pTableMeta(output, table meta data, NEED to free it by calller)
+ * @return error code
+ */
+int32_t catalogGetSTableMeta(struct SCatalog* pCatalog, void * pTransporter, const SEpSet* pMgmtEps, const SName* pTableName, STableMeta** pTableMeta);
+
+
 /**
  * Force renew a table's local cached meta data. 
  * @param pCatalog (input, got with catalogGetHandle)
  * @param pTransporter (input, rpc object)
  * @param pMgmtEps (input, mnode EPs)
  * @param pTableName (input, table name, NOT including db name)
+ * @param isSTable (input, is super table or not, 1:supposed to be stable, 0: supposed not to be stable, -1:not sure) 
  * @return error code
  */
-int32_t catalogRenewTableMeta(struct SCatalog* pCatalog, void * pTransporter, const SEpSet* pMgmtEps, const SName* pTableName);
+  int32_t catalogRenewTableMeta(struct SCatalog* pCatalog, void *pTransporter, const SEpSet* pMgmtEps, const SName* pTableName, int32_t isSTable);
 
 /**
  * Force renew a table's local cached meta data and get the new one. 
@@ -120,9 +133,11 @@ int32_t catalogRenewTableMeta(struct SCatalog* pCatalog, void * pTransporter, co
  * @param pMgmtEps (input, mnode EPs)
  * @param pTableName (input, table name, NOT including db name)
  * @param pTableMeta(output, table meta data, NEED to free it by calller) 
+ * @param isSTable (input, is super table or not, 1:supposed to be stable, 0: supposed not to be stable, -1:not sure) 
  * @return error code
  */
-int32_t catalogRenewAndGetTableMeta(struct SCatalog* pCatalog, void *pTransporter, const SEpSet* pMgmtEps, const SName* pTableName, STableMeta** pTableMeta);
+  int32_t catalogRenewAndGetTableMeta(struct SCatalog* pCatalog, void *pTransporter, const SEpSet* pMgmtEps, const SName* pTableName, STableMeta** pTableMeta, int32_t isSTable);
+
 
 
 /**
diff --git a/source/libs/catalog/src/catalog.c b/source/libs/catalog/src/catalog.c
index 5e8a9389f0a146a47a17c110c2c1b70db14a9fed..b5adb21bcfb0a4e89d241d17460bed1beca28aa7 100644
--- a/source/libs/catalog/src/catalog.c
+++ b/source/libs/catalog/src/catalog.c
@@ -119,6 +119,8 @@ int32_t ctgGetTableMetaFromCache(struct SCatalog* pCatalog, const SName* pTableN
   }
 
   *exist = 1;
+  
+  tbMeta = *pTableMeta;
 
   if (tbMeta->tableType != TSDB_CHILD_TABLE) {
     ctgDebug("Got tablemeta from cache, tbName:%s", tbFullName);
@@ -199,14 +201,7 @@ void ctgGenEpSet(SEpSet *epSet, SVgroupInfo *vgroupInfo) {
   }
 }
 
-int32_t ctgGetTableMetaFromMnode(struct SCatalog* pCatalog, void *pRpc, const SEpSet* pMgmtEps, const SName* pTableName, STableMetaOutput* output) {
-  if (NULL == pCatalog || NULL == pRpc || NULL == pMgmtEps || NULL == pTableName || NULL == output) {
-    CTG_ERR_RET(TSDB_CODE_CTG_INVALID_INPUT);
-  }
-
-  char tbFullName[TSDB_TABLE_FNAME_LEN];
-  tNameExtractFullName(pTableName, tbFullName);
-
+int32_t ctgGetTableMetaFromMnodeImpl(struct SCatalog* pCatalog, void *pRpc, const SEpSet* pMgmtEps, char* tbFullName, STableMetaOutput* output) {
   SBuildTableMetaInput bInput = {.vgId = 0, .dbName = NULL, .tableFullName = tbFullName};
   char *msg = NULL;
   SEpSet *pVnodeEpSet = NULL;
@@ -252,6 +247,12 @@ int32_t ctgGetTableMetaFromMnode(struct SCatalog* pCatalog, void *pRpc, const SE
   return TSDB_CODE_SUCCESS;
 }
 
+int32_t ctgGetTableMetaFromMnode(struct SCatalog* pCatalog, void *pRpc, const SEpSet* pMgmtEps, const SName* pTableName, STableMetaOutput* output) {
+  char tbFullName[TSDB_TABLE_FNAME_LEN];
+  tNameExtractFullName(pTableName, tbFullName);
+
+  return ctgGetTableMetaFromMnodeImpl(pCatalog, pRpc, pMgmtEps, tbFullName, output);
+}
 
 int32_t ctgGetTableMetaFromVnode(struct SCatalog* pCatalog, void *pRpc, const SEpSet* pMgmtEps, const SName* pTableName, SVgroupInfo *vgroupInfo, STableMetaOutput* output) {
   if (NULL == pCatalog || NULL == pRpc || NULL == pMgmtEps || NULL == pTableName || NULL == vgroupInfo || NULL == output) {
@@ -456,14 +457,12 @@ int32_t ctgMetaRentAdd(SMetaRentMgmt *mgmt, void *meta, int64_t id, int32_t size
   if (NULL == slot->meta) {
     slot->meta = taosArrayInit(CTG_DEFAULT_RENT_SLOT_SIZE, size);
     if (NULL == slot->meta) {
-      CTG_UNLOCK(CTG_WRITE, &slot->lock);
       qError("taosArrayInit %d failed, id:%"PRIx64", slot idx:%d, type:%d", CTG_DEFAULT_RENT_SLOT_SIZE, id, widx, mgmt->type);
       CTG_ERR_JRET(TSDB_CODE_CTG_MEM_ERROR);
     }
   }
 
   if (NULL == taosArrayPush(slot->meta, meta)) {
-    CTG_UNLOCK(CTG_WRITE, &slot->lock);
     qError("taosArrayPush meta to rent failed, id:%"PRIx64", slot idx:%d, type:%d", id, widx, mgmt->type);
     CTG_ERR_JRET(TSDB_CODE_CTG_MEM_ERROR);
   }
@@ -486,7 +485,6 @@ int32_t ctgMetaRentUpdate(SMetaRentMgmt *mgmt, void *meta, int64_t id, int32_t s
   
   CTG_LOCK(CTG_WRITE, &slot->lock);
   if (NULL == slot->meta) {
-    CTG_UNLOCK(CTG_WRITE, &slot->lock);
     qError("meta in slot is empty, id:%"PRIx64", slot idx:%d, type:%d", id, widx, mgmt->type);
     CTG_ERR_JRET(TSDB_CODE_CTG_MEM_ERROR);
   }
@@ -498,8 +496,7 @@ int32_t ctgMetaRentUpdate(SMetaRentMgmt *mgmt, void *meta, int64_t id, int32_t s
   }
 
   void *orig = taosArraySearch(slot->meta, &id, compare, TD_EQ);
-  if (NULL == orig) {    
-    CTG_UNLOCK(CTG_WRITE, &slot->lock);
+  if (NULL == orig) {
     qError("meta not found in slot, id:%"PRIx64", slot idx:%d, type:%d", id, widx, mgmt->type);
     CTG_ERR_JRET(TSDB_CODE_CTG_INTERNAL_ERROR);
   }
@@ -610,6 +607,10 @@ int32_t ctgUpdateTableMetaCache(struct SCatalog *pCatalog, STableMetaOutput *out
       ctgError("taosHashInit failed, num:%d", ctgMgmt.cfg.maxTblCacheNum);
       CTG_ERR_RET(TSDB_CODE_CTG_MEM_ERROR);
     }
+
+    if (NULL != atomic_val_compare_exchange_ptr(&pCatalog->tableCache.cache, NULL, cache)) {
+      taosHashCleanup(cache);
+    }
   }
 
   if (NULL == pCatalog->tableCache.stableCache) {
@@ -618,6 +619,10 @@ int32_t ctgUpdateTableMetaCache(struct SCatalog *pCatalog, STableMetaOutput *out
       ctgError("taosHashInit failed, num:%d", ctgMgmt.cfg.maxTblCacheNum);
       CTG_ERR_RET(TSDB_CODE_CTG_MEM_ERROR);
     }
+
+    if (NULL != atomic_val_compare_exchange_ptr(&pCatalog->tableCache.stableCache, NULL, cache)) {
+      taosHashCleanup(cache);
+    }
   }
 
   if (output->metaNum == 2) {
@@ -1039,6 +1044,10 @@ int32_t catalogUpdateDBVgroup(struct SCatalog* pCatalog, const char* dbName, SDB
       ctgError("taosHashInit %d failed", CTG_DEFAULT_CACHE_DB_NUMBER);
       CTG_ERR_JRET(TSDB_CODE_CTG_MEM_ERROR);
     }
+
+    if (NULL != atomic_val_compare_exchange_ptr(&pCatalog->dbCache.cache, NULL, cache)) {
+      taosHashCleanup(cache);
+    }
   } else {
     CTG_ERR_JRET(ctgValidateAndRemoveDb(pCatalog, dbName, dbInfo));
   }
@@ -1084,22 +1093,7 @@ int32_t catalogRenewTableMeta(struct SCatalog* pCatalog, void *pTransporter, con
     CTG_ERR_RET(TSDB_CODE_CTG_INVALID_INPUT);
   }
 
-  SVgroupInfo vgroupInfo = {0};
-  int32_t code = 0;
-
-  CTG_ERR_RET(catalogGetTableHashVgroup(pCatalog, pTransporter, pMgmtEps, pTableName, &vgroupInfo));
-
-  STableMetaOutput output = {0};
-  
-  CTG_ERR_RET(ctgGetTableMetaFromVnode(pCatalog, pTransporter, pMgmtEps, pTableName, &vgroupInfo, &output));
-
-  //CTG_ERR_RET(ctgGetTableMetaFromMnode(pCatalog, pRpc, pMgmtEps, pTableName, &output));
-
-  CTG_ERR_JRET(ctgUpdateTableMetaCache(pCatalog, &output));
-
-_return:
-  tfree(output.tbMeta);
-  CTG_RET(code);
+  return ctgRenewTableMetaImpl(pCatalog, pTransporter, pMgmtEps, pTableName, isSTable);
 }
 
 int32_t catalogRenewAndGetTableMeta(struct SCatalog* pCatalog, void *pTransporter, const SEpSet* pMgmtEps, const SName* pTableName, STableMeta** pTableMeta, int32_t isSTable) {
diff --git a/source/libs/catalog/test/catalogTests.cpp b/source/libs/catalog/test/catalogTests.cpp
index 5cba98c8d516ded77df2cd7f59f72a17d3d3ee40..98a25a0f82e5947fed1d93401e521a7238ce2972 100644
--- a/source/libs/catalog/test/catalogTests.cpp
+++ b/source/libs/catalog/test/catalogTests.cpp
@@ -601,7 +601,6 @@ void *ctgTestSetCtableMetaThread(void *param) {
 
 }
 
-#if 0
 
 TEST(tableMeta, normalTable) {
   struct SCatalog* pCtg = NULL;
@@ -841,7 +840,7 @@ TEST(tableMeta, superTableCase) {
   ASSERT_EQ(tableMeta->tableInfo.rowSize, 12);
 
   tableMeta = NULL;
-  code = catalogRenewAndGetTableMeta(pCtg, mockPointer, (const SEpSet *)mockPointer, &n, &tableMeta);
+  code = catalogRenewAndGetTableMeta(pCtg, mockPointer, (const SEpSet *)mockPointer, &n, &tableMeta, 0);
   ASSERT_EQ(code, 0);
   ASSERT_EQ(tableMeta->vgId, 9);
   ASSERT_EQ(tableMeta->tableType, TSDB_CHILD_TABLE);