diff --git a/docs/zh/07-develop/07-tmq.mdx b/docs/zh/07-develop/07-tmq.mdx
index a617935bbf8a6047c4614e3cf2217c9394948b45..1f5a089aaa2a051e238eedc0315c37cad643b33f 100644
--- a/docs/zh/07-develop/07-tmq.mdx
+++ b/docs/zh/07-develop/07-tmq.mdx
@@ -420,7 +420,18 @@ let mut consumer = tmq.build()?;
 
 <TabItem value="Python" label="Python">
 
-Python 使用以下配置项创建一个 Consumer 实例。
+Python 语言下引入 `taos` 库的 `TaosConsumer` 类，创建一个 Consumer 示例：
+
+```python
+from taos.tmq import TaosConsumer
+
+# Syntax: `consumer = TaosConsumer(*topics, **args)`
+#
+# Example:
+consumer = TaosConsumer('topic1', 'topic2', td_connect_ip = "127.0.0.1", group_id = "local")
+```
+
+其中，元组类型参数被视为 *Topics*，字典类型参数用于以下订阅配置设置：
 
 |            参数名称            |  类型  | 参数说明                                                 | 备注                                        |
 | :----------------------------: | :----: | -------------------------------------------------------- | ------------------------------------------- |
diff --git a/include/common/tmsg.h b/include/common/tmsg.h
index e25fbe6201fcd6c51bff78f3e098a3fb9d0b60b4..42bdc3af16761b1d6a06cd7fc4bdadc05b5546fa 100644
--- a/include/common/tmsg.h
+++ b/include/common/tmsg.h
@@ -343,6 +343,8 @@ typedef struct {
 } SSchemaWrapper;
 
 static FORCE_INLINE SSchemaWrapper* tCloneSSchemaWrapper(const SSchemaWrapper* pSchemaWrapper) {
+  if (pSchemaWrapper->pSchema == NULL) return NULL;
+
   SSchemaWrapper* pSW = (SSchemaWrapper*)taosMemoryMalloc(sizeof(SSchemaWrapper));
   if (pSW == NULL) return pSW;
   pSW->nCols = pSchemaWrapper->nCols;
@@ -352,6 +354,7 @@ static FORCE_INLINE SSchemaWrapper* tCloneSSchemaWrapper(const SSchemaWrapper* p
     taosMemoryFree(pSW);
     return NULL;
   }
+
   memcpy(pSW->pSchema, pSchemaWrapper->pSchema, pSW->nCols * sizeof(SSchema));
   return pSW;
 }
diff --git a/source/dnode/vnode/src/meta/metaEntry.c b/source/dnode/vnode/src/meta/metaEntry.c
index b7bdadec03a184a8debc7c2f9a0366fa1ec80734..72f7365a1e3304c8fa5c387eea24a968ebb87c14 100644
--- a/source/dnode/vnode/src/meta/metaEntry.c
+++ b/source/dnode/vnode/src/meta/metaEntry.c
@@ -21,7 +21,7 @@ int metaEncodeEntry(SEncoder *pCoder, const SMetaEntry *pME) {
   if (tEncodeI64(pCoder, pME->version) < 0) return -1;
   if (tEncodeI8(pCoder, pME->type) < 0) return -1;
   if (tEncodeI64(pCoder, pME->uid) < 0) return -1;
-  if (tEncodeCStr(pCoder, pME->name) < 0) return -1;
+  if (pME->name == NULL || tEncodeCStr(pCoder, pME->name) < 0) return -1;
 
   if (pME->type == TSDB_SUPER_TABLE) {
     if (tEncodeI8(pCoder, pME->flags) < 0) return -1;  // TODO: need refactor?
diff --git a/source/libs/catalog/inc/catalogInt.h b/source/libs/catalog/inc/catalogInt.h
index fe71987103aedbee555b67e99c95a7fb6fb2fb0e..0786321686a5ae6f5b7f7937f4c5ec425f6d6c31 100644
--- a/source/libs/catalog/inc/catalogInt.h
+++ b/source/libs/catalog/inc/catalogInt.h
@@ -505,6 +505,7 @@ typedef struct SCtgOperation {
 #define CTG_FLAG_UNKNOWN_STB  0x4
 #define CTG_FLAG_SYS_DB       0x8
 #define CTG_FLAG_FORCE_UPDATE 0x10
+#define CTG_FLAG_ONLY_CACHE   0x20
 
 #define CTG_FLAG_SET(_flag, _v) ((_flag) |= (_v))
 
@@ -783,7 +784,7 @@ void    ctgFreeQNode(SCtgQNode* node);
 void    ctgClearHandle(SCatalog* pCtg);
 void    ctgFreeTbCacheImpl(SCtgTbCache* pCache);
 int32_t ctgRemoveTbMeta(SCatalog* pCtg, SName* pTableName);
-int32_t ctgGetTbHashVgroup(SCatalog* pCtg, SRequestConnInfo* pConn, const SName* pTableName, SVgroupInfo* pVgroup);
+int32_t ctgGetTbHashVgroup(SCatalog* pCtg, SRequestConnInfo* pConn, const SName* pTableName, SVgroupInfo* pVgroup, bool* exists);
 SName*  ctgGetFetchName(SArray* pNames, SCtgFetch* pFetch);
 
 extern SCatalogMgmt gCtgMgmt;
diff --git a/source/libs/catalog/src/catalog.c b/source/libs/catalog/src/catalog.c
index 218a86ed5cad6979afd483394906969df5ff0dc0..5997f63a16e0d669467a18a53eb84e9e6bcfebd9 100644
--- a/source/libs/catalog/src/catalog.c
+++ b/source/libs/catalog/src/catalog.c
@@ -23,12 +23,21 @@
 SCatalogMgmt gCtgMgmt = {0};
 
 int32_t ctgGetDBVgInfo(SCatalog* pCtg, SRequestConnInfo* pConn, const char* dbFName, SCtgDBCache** dbCache,
-                       SDBVgInfo** pInfo) {
+                       SDBVgInfo** pInfo, bool* exists) {
   int32_t code = 0;
 
   CTG_ERR_RET(ctgAcquireVgInfoFromCache(pCtg, dbFName, dbCache));
 
   if (*dbCache) {
+    if (exists) {
+      *exists = true;
+    }
+    
+    return TSDB_CODE_SUCCESS;
+  }
+
+  if (exists) {
+    *exists = false;
     return TSDB_CODE_SUCCESS;
   }
 
@@ -94,7 +103,7 @@ int32_t ctgRefreshTbMeta(SCatalog* pCtg, SRequestConnInfo* pConn, SCtgTbMetaCtx*
   int32_t     code = 0;
 
   if (!CTG_FLAG_IS_SYS_DB(ctx->flag)) {
-    CTG_ERR_RET(ctgGetTbHashVgroup(pCtg, pConn, ctx->pName, &vgroupInfo));
+    CTG_ERR_RET(ctgGetTbHashVgroup(pCtg, pConn, ctx->pName, &vgroupInfo, NULL));
   }
 
   STableMetaOutput  moutput = {0};
@@ -194,7 +203,7 @@ int32_t ctgGetTbMeta(SCatalog* pCtg, SRequestConnInfo* pConn, SCtgTbMetaCtx* ctx
   STableMetaOutput* output = NULL;
 
   CTG_ERR_RET(ctgGetTbMetaFromCache(pCtg, pConn, ctx, pTableMeta));
-  if (*pTableMeta) {
+  if (*pTableMeta || (ctx->flag & CTG_FLAG_ONLY_CACHE)) {
     goto _return;
   }
 
@@ -415,7 +424,7 @@ int32_t ctgGetTbCfg(SCatalog* pCtg, SRequestConnInfo* pConn, SName* pTableName,
     CTG_ERR_RET(ctgGetTableCfgFromMnode(pCtg, pConn, pTableName, pCfg, NULL));
   } else {
     SVgroupInfo vgroupInfo = {0};
-    CTG_ERR_RET(ctgGetTbHashVgroup(pCtg, pConn, pTableName, &vgroupInfo));
+    CTG_ERR_RET(ctgGetTbHashVgroup(pCtg, pConn, pTableName, &vgroupInfo, NULL));
     CTG_ERR_RET(ctgGetTableCfgFromVnode(pCtg, pConn, pTableName, &vgroupInfo, pCfg, NULL));
   }
 
@@ -441,7 +450,7 @@ int32_t ctgGetTbDistVgInfo(SCatalog* pCtg, SRequestConnInfo* pConn, SName* pTabl
   tNameGetFullDbName(pTableName, db);
 
   SHashObj* vgHash = NULL;
-  CTG_ERR_JRET(ctgGetDBVgInfo(pCtg, pConn, db, &dbCache, &vgInfo));
+  CTG_ERR_JRET(ctgGetDBVgInfo(pCtg, pConn, db, &dbCache, &vgInfo, NULL));
 
   if (dbCache) {
     vgHash = dbCache->vgCache.vgInfo->vgHash;
@@ -501,7 +510,7 @@ _return:
   CTG_RET(code);
 }
 
-int32_t ctgGetTbHashVgroup(SCatalog* pCtg, SRequestConnInfo* pConn, const SName* pTableName, SVgroupInfo* pVgroup) {
+int32_t ctgGetTbHashVgroup(SCatalog* pCtg, SRequestConnInfo* pConn, const SName* pTableName, SVgroupInfo* pVgroup, bool* exists) {
   if (IS_SYS_DBNAME(pTableName->dbname)) {
     ctgError("no valid vgInfo for db, dbname:%s", pTableName->dbname);
     CTG_ERR_RET(TSDB_CODE_CTG_INVALID_INPUT);
@@ -513,8 +522,13 @@ int32_t ctgGetTbHashVgroup(SCatalog* pCtg, SRequestConnInfo* pConn, const SName*
   tNameGetFullDbName(pTableName, db);
 
   SDBVgInfo* vgInfo = NULL;
-  CTG_ERR_JRET(ctgGetDBVgInfo(pCtg, pConn, db, &dbCache, &vgInfo));
+  CTG_ERR_JRET(ctgGetDBVgInfo(pCtg, pConn, db, &dbCache, &vgInfo, exists));
 
+  if (exists && false == *exists) {
+    ctgDebug("db %s vgInfo not in cache", pTableName->dbname);
+    return TSDB_CODE_SUCCESS;
+  }
+  
   CTG_ERR_JRET(ctgGetVgInfoFromHashValue(pCtg, vgInfo ? vgInfo : dbCache->vgCache.vgInfo, pTableName, pVgroup));
 
 _return:
@@ -737,7 +751,7 @@ int32_t catalogGetDBVgInfo(SCatalog* pCtg, SRequestConnInfo* pConn, const char*
   SArray*      vgList = NULL;
   SHashObj*    vgHash = NULL;
   SDBVgInfo*   vgInfo = NULL;
-  CTG_ERR_JRET(ctgGetDBVgInfo(pCtg, pConn, dbFName, &dbCache, &vgInfo));
+  CTG_ERR_JRET(ctgGetDBVgInfo(pCtg, pConn, dbFName, &dbCache, &vgInfo, NULL));
   if (dbCache) {
     vgHash = dbCache->vgCache.vgInfo->vgHash;
   } else {
@@ -880,6 +894,17 @@ int32_t catalogGetTableMeta(SCatalog* pCtg, SRequestConnInfo* pConn, const SName
   CTG_API_LEAVE(ctgGetTbMeta(pCtg, pConn, &ctx, pTableMeta));
 }
 
+int32_t catalogGetCachedTableMeta(SCatalog* pCtg, SRequestConnInfo* pConn, const SName* pTableName, STableMeta** pTableMeta) {
+  CTG_API_ENTER();
+
+  SCtgTbMetaCtx ctx = {0};
+  ctx.pName = (SName*)pTableName;
+  ctx.flag = CTG_FLAG_UNKNOWN_STB | CTG_FLAG_ONLY_CACHE;
+
+  CTG_API_LEAVE(ctgGetTbMeta(pCtg, pConn, &ctx, pTableMeta));
+}
+
+
 int32_t catalogGetSTableMeta(SCatalog* pCtg, SRequestConnInfo* pConn, const SName* pTableName,
                              STableMeta** pTableMeta) {
   CTG_API_ENTER();
@@ -891,6 +916,18 @@ int32_t catalogGetSTableMeta(SCatalog* pCtg, SRequestConnInfo* pConn, const SNam
   CTG_API_LEAVE(ctgGetTbMeta(pCtg, pConn, &ctx, pTableMeta));
 }
 
+int32_t catalogGetCachedSTableMeta(SCatalog* pCtg, SRequestConnInfo* pConn, const SName* pTableName,
+                            STableMeta** pTableMeta) {
+  CTG_API_ENTER();
+
+  SCtgTbMetaCtx ctx = {0};
+  ctx.pName = (SName*)pTableName;
+  ctx.flag = CTG_FLAG_STB | CTG_FLAG_ONLY_CACHE;
+
+  CTG_API_LEAVE(ctgGetTbMeta(pCtg, pConn, &ctx, pTableMeta));
+}
+
+
 int32_t catalogUpdateTableMeta(SCatalog* pCtg, STableMetaRsp* pMsg) {
   CTG_API_ENTER();
 
@@ -1009,7 +1046,14 @@ int32_t catalogGetTableHashVgroup(SCatalog* pCtg, SRequestConnInfo* pConn, const
                                   SVgroupInfo* pVgroup) {
   CTG_API_ENTER();
 
-  CTG_API_LEAVE(ctgGetTbHashVgroup(pCtg, pConn, pTableName, pVgroup));
+  CTG_API_LEAVE(ctgGetTbHashVgroup(pCtg, pConn, pTableName, pVgroup, NULL));
+}
+
+int32_t catalogGetCachedTableHashVgroup(SCatalog* pCtg, SRequestConnInfo* pConn, const SName* pTableName,
+                                  SVgroupInfo* pVgroup, bool* exists) {
+  CTG_API_ENTER();
+
+  CTG_API_LEAVE(ctgGetTbHashVgroup(pCtg, pConn, pTableName, pVgroup, exists));
 }
 
 int32_t catalogGetAllMeta(SCatalog* pCtg, SRequestConnInfo* pConn, const SCatalogReq* pReq, SMetaData* pRsp) {
diff --git a/source/libs/tdb/src/db/tdbBtree.c b/source/libs/tdb/src/db/tdbBtree.c
index 8f11fb88a2399f84af8b32e41fb9477c2d61485c..ba0b3dbcf8206a54b68bfffbb0c4a14584dc93b9 100644
--- a/source/libs/tdb/src/db/tdbBtree.c
+++ b/source/libs/tdb/src/db/tdbBtree.c
@@ -1094,6 +1094,7 @@ static int tdbBtreeEncodePayload(SPage *pPage, SCell *pCell, int nHeader, const
           // fetch next ofp, a new ofp and make it dirty
           ret = tdbFetchOvflPage(&pgno, &nextOfp, pTxn, pBt);
           if (ret < 0) {
+            tdbFree(pBuf);
             return -1;
           }
         }
@@ -1135,6 +1136,11 @@ static int tdbBtreeEncodePayload(SPage *pPage, SCell *pCell, int nHeader, const
         memcpy(pBuf, ((SCell *)pVal) + vLen - nLeft, bytes);
         memcpy(pBuf + bytes, &pgno, sizeof(pgno));
 
+        if (ofp == NULL) {
+          tdbFree(pBuf);
+          return -1;
+        }
+
         ret = tdbPageInsertCell(ofp, 0, pBuf, bytes + sizeof(pgno), 0);
         if (ret < 0) {
           tdbFree(pBuf);
diff --git a/source/libs/tdb/src/db/tdbDb.c b/source/libs/tdb/src/db/tdbDb.c
index a2002a3ac46fd04cd8b0004f5fe4f0a22238e129..1e2b059adbf5d201140331039daf8a493c3dbe32 100644
--- a/source/libs/tdb/src/db/tdbDb.c
+++ b/source/libs/tdb/src/db/tdbDb.c
@@ -106,7 +106,8 @@ int32_t tdbBegin(TDB *pDb, TXN *pTxn) {
   for (pPager = pDb->pgrList; pPager; pPager = pPager->pNext) {
     ret = tdbPagerBegin(pPager, pTxn);
     if (ret < 0) {
-      tdbError("failed to begin pager since %s. dbName:%s, txnId:%ld", tstrerror(terrno), pDb->dbName, pTxn->txnId);
+      tdbError("failed to begin pager since %s. dbName:%s, txnId:%" PRId64, tstrerror(terrno), pDb->dbName,
+               pTxn->txnId);
       return -1;
     }
   }
@@ -121,7 +122,8 @@ int32_t tdbCommit(TDB *pDb, TXN *pTxn) {
   for (pPager = pDb->pgrList; pPager; pPager = pPager->pNext) {
     ret = tdbPagerCommit(pPager, pTxn);
     if (ret < 0) {
-      tdbError("failed to commit pager since %s. dbName:%s, txnId:%ld", tstrerror(terrno), pDb->dbName, pTxn->txnId);
+      tdbError("failed to commit pager since %s. dbName:%s, txnId:%" PRId64, tstrerror(terrno), pDb->dbName,
+               pTxn->txnId);
       return -1;
     }
   }
@@ -151,7 +153,8 @@ int32_t tdbAbort(TDB *pDb, TXN *pTxn) {
   for (pPager = pDb->pgrList; pPager; pPager = pPager->pNext) {
     ret = tdbPagerAbort(pPager, pTxn);
     if (ret < 0) {
-      tdbError("failed to abort pager since %s. dbName:%s, txnId:%ld", tstrerror(terrno), pDb->dbName, pTxn->txnId);
+      tdbError("failed to abort pager since %s. dbName:%s, txnId:%" PRId64, tstrerror(terrno), pDb->dbName,
+               pTxn->txnId);
       return -1;
     }
   }
diff --git a/source/libs/tdb/src/db/tdbPCache.c b/source/libs/tdb/src/db/tdbPCache.c
index 732a57639f2cc1a931a81058461034911a6729ee..667cd706c5e7814cce5d7a932f53fe59cc948b7c 100644
--- a/source/libs/tdb/src/db/tdbPCache.c
+++ b/source/libs/tdb/src/db/tdbPCache.c
@@ -105,7 +105,7 @@ static int tdbPCacheAlterImpl(SPCache *pCache, int32_t nPage) {
     for (int32_t iPage = pCache->nPages; iPage < nPage; iPage++) {
       if (tdbPageCreate(pCache->szPage, &aPage[iPage], tdbDefaultMalloc, NULL) < 0) {
         // TODO: handle error
-        tdbOsFree(pCache->aPage);
+        tdbOsFree(aPage);
         return -1;
       }
 
diff --git a/source/libs/tdb/src/db/tdbPager.c b/source/libs/tdb/src/db/tdbPager.c
index 58f6cedc2268d847d53bd6f739e77506bb57b3c6..7c8ab16ec7f3814a7c0a45d27bfd2cb6f9a18a99 100644
--- a/source/libs/tdb/src/db/tdbPager.c
+++ b/source/libs/tdb/src/db/tdbPager.c
@@ -575,7 +575,7 @@ static int tdbPagerWritePageToDB(SPager *pPager, SPage *pPage) {
 
   offset = (i64)pPage->pageSize * (TDB_PAGE_PGNO(pPage) - 1);
   if (tdbOsLSeek(pPager->fd, offset, SEEK_SET) < 0) {
-    tdbError("failed to lseek due to %s. file:%s, offset:%ld", strerror(errno), pPager->dbFileName, offset);
+    tdbError("failed to lseek due to %s. file:%s, offset:%" PRId64, strerror(errno), pPager->dbFileName, offset);
     terrno = TAOS_SYSTEM_ERROR(errno);
     return -1;
   }
@@ -630,7 +630,7 @@ int tdbPagerRestore(SPager *pPager, SBTree *pBt) {
 
     i64 offset = pPager->pageSize * (pgno - 1);
     if (tdbOsLSeek(pPager->fd, offset, SEEK_SET) < 0) {
-      tdbError("failed to lseek fd due to %s. file:%s, offset:%ld", strerror(errno), pPager->dbFileName, offset);
+      tdbError("failed to lseek fd due to %s. file:%s, offset:%" PRId64, strerror(errno), pPager->dbFileName, offset);
       terrno = TAOS_SYSTEM_ERROR(errno);
       tdbOsFree(pageBuf);
       return -1;