diff --git a/include/common/tmsgdef.h b/include/common/tmsgdef.h
index 6863e3c336e60bb32d0907914e0d80c7c0663fe6..4a6368ef3029c6e22e4a300d2d10da8fddafa732 100644
--- a/include/common/tmsgdef.h
+++ b/include/common/tmsgdef.h
@@ -198,7 +198,7 @@ enum {
   TD_DEF_MSG_TYPE(TDMT_VND_ALTER_CONFIRM, "alter-confirm", NULL, NULL)
   TD_DEF_MSG_TYPE(TDMT_VND_ALTER_HASHRANGE, "alter-hashrange", NULL, NULL)
   TD_DEF_MSG_TYPE(TDMT_VND_COMPACT, "compact", NULL, NULL)
-
+  TD_DEF_MSG_TYPE(TDMT_VND_DROP_TTL_TABLE, "drop-ttl-stb", NULL, NULL)
   TD_NEW_MSG_SEG(TDMT_QND_MSG)
 
   //shared by snode and vnode
diff --git a/source/common/src/tmsg.c b/source/common/src/tmsg.c
index 2f7ca249ef829af37f7705de10cee526b1956366..945238ba1ccd073b79b321978ea89311e1a89248 100644
--- a/source/common/src/tmsg.c
+++ b/source/common/src/tmsg.c
@@ -498,7 +498,7 @@ int32_t tSerializeSMCreateStbReq(void *buf, int32_t bufLen, SMCreateStbReq *pReq
   }
 
   if (pReq->commentLen > 0) {
-    if (tEncodeBinary(&encoder, pReq->comment, pReq->commentLen) < 0) return -1;
+    if (tEncodeCStrWithLen(&encoder, pReq->comment, pReq->commentLen) < 0) return -1;
   }
   if (pReq->ast1Len > 0) {
     if (tEncodeBinary(&encoder, pReq->pAst1, pReq->ast1Len) < 0) return -1;
@@ -561,7 +561,7 @@ int32_t tDeserializeSMCreateStbReq(void *buf, int32_t bufLen, SMCreateStbReq *pR
   }
 
   if (pReq->commentLen > 0) {
-    pReq->comment = taosMemoryMalloc(pReq->commentLen);
+    pReq->comment = taosMemoryCalloc(1, pReq->commentLen + 1);
     if (pReq->comment == NULL) return -1;
     if (tDecodeCStrTo(&decoder, pReq->comment) < 0) return -1;
   }
diff --git a/source/dnode/mnode/impl/src/mndStb.c b/source/dnode/mnode/impl/src/mndStb.c
index 6f89c97f8322e90a3a3a422ade34abacb110cf15..d498b640cb2708a96457fa2fa73859622c35ddf3 100644
--- a/source/dnode/mnode/impl/src/mndStb.c
+++ b/source/dnode/mnode/impl/src/mndStb.c
@@ -671,12 +671,12 @@ int32_t mndBuildStbFromReq(SMnode *pMnode, SStbObj *pDst, SMCreateStbReq *pCreat
   pDst->numOfTags = pCreate->numOfTags;
   pDst->commentLen = pCreate->commentLen;
   if (pDst->commentLen > 0) {
-    pDst->comment = taosMemoryCalloc(pDst->commentLen, 1);
+    pDst->comment = taosMemoryCalloc(pDst->commentLen + 1, 1);
     if (pDst->comment == NULL) {
       terrno = TSDB_CODE_OUT_OF_MEMORY;
       return -1;
     }
-    memcpy(pDst->comment, pCreate->comment, pDst->commentLen);
+    memcpy(pDst->comment, pCreate->comment, pDst->commentLen + 1);
   }
 
   pDst->ast1Len = pCreate->ast1Len;
diff --git a/source/dnode/vnode/src/inc/vnodeInt.h b/source/dnode/vnode/src/inc/vnodeInt.h
index 300a5f890e7436c124eea2b74bf62a2d1bcf2d8a..ea856796b367321ce85a5d02c8b5566b007cc2f4 100644
--- a/source/dnode/vnode/src/inc/vnodeInt.h
+++ b/source/dnode/vnode/src/inc/vnodeInt.h
@@ -87,6 +87,7 @@ int             metaAlterSTable(SMeta* pMeta, int64_t version, SVCreateStbReq* p
 int             metaDropSTable(SMeta* pMeta, int64_t verison, SVDropStbReq* pReq);
 int             metaCreateTable(SMeta* pMeta, int64_t version, SVCreateTbReq* pReq);
 int             metaDropTable(SMeta* pMeta, int64_t version, SVDropTbReq* pReq, SArray* tbUids);
+int             metaTtlDropTable(SMeta *pMeta, int64_t ttl, SArray *tbUids);
 int             metaAlterTable(SMeta* pMeta, int64_t version, SVAlterTbReq* pReq, STableMetaRsp* pMetaRsp);
 SSchemaWrapper* metaGetTableSchema(SMeta* pMeta, tb_uid_t uid, int32_t sver, bool isinline);
 STSchema*       metaGetTbTSchema(SMeta* pMeta, tb_uid_t uid, int32_t sver);
@@ -105,6 +106,7 @@ int32_t         metaSnapshotReaderClose(SMetaSnapshotReader* pReader);
 int32_t         metaSnapshotRead(SMetaSnapshotReader* pReader, void** ppData, uint32_t* nData);
 void*           metaGetIdx(SMeta* pMeta);
 void*           metaGetIvtIdx(SMeta* pMeta);
+int             metaTtlSmaller(SMeta *pMeta, uint64_t time, SArray *uidList);
 
 int32_t metaCreateTSma(SMeta* pMeta, int64_t version, SSmaCfg* pCfg);
 int32_t metaDropTSma(SMeta* pMeta, int64_t indexUid);
diff --git a/source/dnode/vnode/src/meta/metaQuery.c b/source/dnode/vnode/src/meta/metaQuery.c
index a6339125c42e873a62b231ab3932736023f2204f..4f43f99c855f589a19f7d0af3cfee37d21c68562 100644
--- a/source/dnode/vnode/src/meta/metaQuery.c
+++ b/source/dnode/vnode/src/meta/metaQuery.c
@@ -95,7 +95,7 @@ tb_uid_t metaGetTableEntryUidByName(SMeta *pMeta, const char *name) {
 
   metaULock(pMeta);
 
-  return 0;
+  return uid;
 }
 
 int metaReadNext(SMetaReader *pReader) {
@@ -218,6 +218,40 @@ _err:
   return NULL;
 }
 
+int metaTtlSmaller(SMeta *pMeta, uint64_t ttl, SArray *uidList){
+  metaRLock(pMeta);
+  TBC *    pCur;
+  int ret = tdbTbcOpen(pMeta->pTtlIdx, &pCur, NULL);
+  if (ret < 0) {
+    metaULock(pMeta);
+    return ret;
+  }
+
+  STtlIdxKey ttlKey = {0};
+  ttlKey.dtime = ttl;
+  ttlKey.uid = INT64_MAX;
+  int c = 0;
+  tdbTbcMoveTo(pCur, &ttlKey, sizeof(ttlKey), &c);
+  if (c < 0) {
+    tdbTbcMoveToPrev(pCur);
+  }
+
+  void *pKey = NULL;
+  int kLen = 0;
+  while(1){
+    ret = tdbTbcPrev(pCur, &pKey, &kLen, NULL, NULL);
+    if (ret < 0) {
+      break;
+    }
+    ttlKey = *(STtlIdxKey*)pKey;
+    taosArrayPush(uidList, &ttlKey.uid);
+  }
+  tdbTbcClose(pCur);
+
+  tdbFree(pKey);
+  return 0;
+}
+
 struct SMCtbCursor {
   SMeta *  pMeta;
   TBC *    pCur;
diff --git a/source/dnode/vnode/src/meta/metaTable.c b/source/dnode/vnode/src/meta/metaTable.c
index 9a05f9e5a0c1fd7ca4bb1070deb78101faa8666f..717344fff2d829085bfbc2249d4116fd3b7c4f32 100644
--- a/source/dnode/vnode/src/meta/metaTable.c
+++ b/source/dnode/vnode/src/meta/metaTable.c
@@ -359,7 +359,7 @@ int metaDropTable(SMeta *pMeta, int64_t version, SVDropTbReq *pReq, SArray *tbUi
   metaDropTableByUid(pMeta, uid, &type);
   metaULock(pMeta);
 
-  if (type == TSDB_CHILD_TABLE && tbUids) {
+  if ((type == TSDB_CHILD_TABLE || type == TSDB_NORMAL_TABLE) && tbUids) {
     taosArrayPush(tbUids, &uid);
   }
 
@@ -367,6 +367,47 @@ int metaDropTable(SMeta *pMeta, int64_t version, SVDropTbReq *pReq, SArray *tbUi
   return 0;
 }
 
+int metaTtlDropTable(SMeta *pMeta, int64_t ttl, SArray *tbUids) {
+  metaWLock(pMeta);
+  int ret = metaTtlSmaller(pMeta, ttl, tbUids);
+  if(ret != 0){
+    return ret;
+  }
+  for (int i = 0; i < taosArrayGetSize(tbUids); ++i) {
+    tb_uid_t *uid = (tb_uid_t *)taosArrayGet(tbUids, i);
+    metaDropTableByUid(pMeta, *uid, NULL);
+  }
+  metaULock(pMeta);
+  return 0;
+}
+
+static void metaBuildTtlIdxKey(STtlIdxKey *ttlKey, const SMetaEntry *pME){
+  int32_t    ttlDays;
+  int64_t    ctime;
+  if (pME->type == TSDB_CHILD_TABLE) {
+    ctime = pME->ctbEntry.ctime;
+    ttlDays = pME->ctbEntry.ttlDays;
+  } else if (pME->type == TSDB_NORMAL_TABLE) {
+    ctime = pME->ntbEntry.ctime;
+    ttlDays = pME->ntbEntry.ttlDays;
+  } else {
+    ASSERT(0);
+  }
+
+  if (ttlDays <= 0) return;
+
+  ttlKey->dtime = ctime + ttlDays * 24 * 60 * 60;
+  ttlKey->uid = pME->uid;
+}
+
+static int metaDeleteTtlIdx(SMeta *pMeta, const SMetaEntry *pME) {
+  STtlIdxKey ttlKey = {0};
+  metaBuildTtlIdxKey(&ttlKey, pME);
+  if(ttlKey.dtime == 0) return 0;
+  return tdbTbDelete(pMeta->pTtlIdx, &ttlKey, sizeof(ttlKey), &pMeta->txn);
+}
+
+
 static int metaDropTableByUid(SMeta *pMeta, tb_uid_t uid, int *type) {
   void *     pData = NULL;
   int        nData = 0;
@@ -388,11 +429,12 @@ static int metaDropTableByUid(SMeta *pMeta, tb_uid_t uid, int *type) {
   tdbTbDelete(pMeta->pTbDb, &(STbDbKey){.version = version, .uid = uid}, sizeof(STbDbKey), &pMeta->txn);
   tdbTbDelete(pMeta->pNameIdx, e.name, strlen(e.name) + 1, &pMeta->txn);
   tdbTbDelete(pMeta->pUidIdx, &uid, sizeof(uid), &pMeta->txn);
+  if(e.type != TSDB_SUPER_TABLE) metaDeleteTtlIdx(pMeta, &e);
+
   if (e.type == TSDB_CHILD_TABLE) {
     tdbTbDelete(pMeta->pCtbIdx, &(SCtbIdxKey){.suid = e.ctbEntry.suid, .uid = uid}, sizeof(SCtbIdxKey), &pMeta->txn);
   } else if (e.type == TSDB_NORMAL_TABLE) {
     // drop schema.db (todo)
-    // drop ttl.idx (todo)
   } else if (e.type == TSDB_SUPER_TABLE) {
     // drop schema.db (todo)
   }
@@ -706,8 +748,18 @@ _err:
 }
 
 static int metaUpdateTableOptions(SMeta *pMeta, int64_t version, SVAlterTbReq *pAlterTbReq) {
-  // TODO
-  ASSERT(0);
+  if (commentLen > 0) {
+    pNew->commentLen = commentLen;
+    pNew->comment = taosMemoryCalloc(1, commentLen);
+    if (pNew->comment == NULL) {
+      terrno = TSDB_CODE_OUT_OF_MEMORY;
+      return -1;
+    }
+    memcpy(pNew->comment, pComment, commentLen);
+  }
+  if (ttl >= 0) {
+    pNew->ttl = ttl;
+  }
   return 0;
 }
 
@@ -786,25 +838,9 @@ static int metaUpdateNameIdx(SMeta *pMeta, const SMetaEntry *pME) {
 }
 
 static int metaUpdateTtlIdx(SMeta *pMeta, const SMetaEntry *pME) {
-  int32_t    ttlDays;
-  int64_t    ctime;
-  STtlIdxKey ttlKey;
-
-  if (pME->type == TSDB_CHILD_TABLE) {
-    ctime = pME->ctbEntry.ctime;
-    ttlDays = pME->ctbEntry.ttlDays;
-  } else if (pME->type == TSDB_NORMAL_TABLE) {
-    ctime = pME->ntbEntry.ctime;
-    ttlDays = pME->ntbEntry.ttlDays;
-  } else {
-    ASSERT(0);
-  }
-
-  if (ttlDays <= 0) return 0;
-
-  ttlKey.dtime = ctime + ttlDays * 24 * 60 * 60;
-  ttlKey.uid = pME->uid;
-
+  STtlIdxKey ttlKey = {0};
+  metaBuildTtlIdxKey(&ttlKey, pME);
+  if(ttlKey.dtime == 0) return 0;
   return tdbTbInsert(pMeta->pTtlIdx, &ttlKey, sizeof(ttlKey), NULL, 0, &pMeta->txn);
 }
 
diff --git a/source/dnode/vnode/src/vnd/vnodeSvr.c b/source/dnode/vnode/src/vnd/vnodeSvr.c
index 10e0888988a5b828708fabbaa9e9140eb6653fc8..2540f953e06ddefc9f7b3d06811594407876b533 100644
--- a/source/dnode/vnode/src/vnd/vnodeSvr.c
+++ b/source/dnode/vnode/src/vnd/vnodeSvr.c
@@ -26,6 +26,7 @@ static int32_t vnodeProcessCreateTSmaReq(SVnode *pVnode, int64_t version, void *
 static int32_t vnodeProcessAlterConfirmReq(SVnode *pVnode, int64_t version, void *pReq, int32_t len, SRpcMsg *pRsp);
 static int32_t vnodeProcessAlterHasnRangeReq(SVnode *pVnode, int64_t version, void *pReq, int32_t len, SRpcMsg *pRsp);
 static int32_t vnodeProcessWriteMsg(SVnode *pVnode, int64_t version, SRpcMsg *pMsg, SRpcMsg *pRsp);
+static int32_t vnodeProcessDropTtlTbReq(SVnode *pVnode, int64_t version, void *pReq, int32_t len, SRpcMsg *pRsp);
 
 int32_t vnodePreprocessReq(SVnode *pVnode, SRpcMsg *pMsg) {
   int32_t  code = 0;
@@ -33,7 +34,7 @@ int32_t vnodePreprocessReq(SVnode *pVnode, SRpcMsg *pMsg) {
 
   switch (pMsg->msgType) {
     case TDMT_VND_CREATE_TABLE: {
-      int64_t ctime = taosGetTimestampMs();
+      int64_t ctime = taosGetTimestampSec();
       int32_t nReqs;
 
       tDecoderInit(&dc, (uint8_t *)pMsg->pCont + sizeof(SMsgHead), pMsg->contLen - sizeof(SMsgHead));
@@ -60,7 +61,7 @@ int32_t vnodePreprocessReq(SVnode *pVnode, SRpcMsg *pMsg) {
       SSubmitMsgIter msgIter = {0};
       SSubmitReq    *pSubmitReq = (SSubmitReq *)pMsg->pCont;
       SSubmitBlk    *pBlock = NULL;
-      int64_t        ctime = taosGetTimestampMs();
+      int64_t        ctime = taosGetTimestampSec();
       tb_uid_t       uid;
 
       tInitSubmitMsgIter(pSubmitReq, &msgIter);
@@ -134,6 +135,9 @@ int32_t vnodeProcessWriteReq(SVnode *pVnode, SRpcMsg *pMsg, int64_t version, SRp
     case TDMT_VND_DROP_TABLE:
       if (vnodeProcessDropTbReq(pVnode, version, pReq, len, pRsp) < 0) goto _err;
       break;
+    case TDMT_VND_DROP_TTL_TABLE:
+      if (vnodeProcessDropTtlTbReq(pVnode, version, pReq, len, pRsp) < 0) goto _err;
+      break;
     case TDMT_VND_CREATE_SMA: {
       if (vnodeProcessCreateTSmaReq(pVnode, version, pReq, len, pRsp) < 0) goto _err;
     } break;
@@ -389,6 +393,22 @@ int32_t vnodeProcessSyncReq(SVnode *pVnode, SRpcMsg *pMsg, SRpcMsg **pRsp) {
   return ret;
 }
 
+static int32_t vnodeProcessDropTtlTbReq(SVnode *pVnode, int64_t version, void *pReq, int32_t len, SRpcMsg *pRsp){
+
+  SArray *tbUids = taosArrayInit(8, sizeof(int64_t));
+  if (tbUids == NULL) return TSDB_CODE_OUT_OF_MEMORY;
+
+  int32_t ret = metaTtlDropTable(pVnode->pMeta, *(int64_t*)pReq, tbUids);
+  if(ret != 0){
+    goto end;
+  }
+  tqUpdateTbUidList(pVnode->pTq, tbUids, false);
+
+end:
+  taosArrayDestroy(tbUids);
+  return ret;
+}
+
 static int32_t vnodeProcessCreateStbReq(SVnode *pVnode, int64_t version, void *pReq, int32_t len, SRpcMsg *pRsp) {
   SVCreateStbReq req = {0};
   SDecoder       coder;
diff --git a/source/libs/parser/src/parTranslater.c b/source/libs/parser/src/parTranslater.c
index e887d00e2ce4939dfa12d75ab3814a7f32de30d3..05f1c648243bbb7cb9dfea782aea60d319126d91 100644
--- a/source/libs/parser/src/parTranslater.c
+++ b/source/libs/parser/src/parTranslater.c
@@ -3050,7 +3050,7 @@ static int32_t buildRollupAst(STranslateContext* pCxt, SCreateTableStmt* pStmt,
 static int32_t buildCreateStbReq(STranslateContext* pCxt, SCreateTableStmt* pStmt, SMCreateStbReq* pReq) {
   pReq->igExists = pStmt->ignoreExists;
   pReq->xFilesFactor = pStmt->pOptions->filesFactor;
-  pReq->ttl = pStmt->pOptions->ttl;
+//  pReq->ttl = pStmt->pOptions->ttl;
   columnDefNodeToField(pStmt->pCols, &pReq->pColumns);
   columnDefNodeToField(pStmt->pTags, &pReq->pTags);
   pReq->numOfColumns = LIST_LENGTH(pStmt->pCols);
@@ -4982,7 +4982,7 @@ static int32_t buildUpdateOptionsReq(STranslateContext* pCxt, SAlterTableStmt* p
     }
   }
 
-  if (TSDB_CODE_SUCCESS == code && '\0' != pStmt->pOptions->comment[0]) {
+  if (TSDB_CODE_SUCCESS == code) {
     pReq->updateComment = true;
     pReq->newComment = strdup(pStmt->pOptions->comment);
     if (NULL == pReq->newComment) {
@@ -5105,6 +5105,9 @@ static int32_t rewriteAlterTableImpl(STranslateContext* pCxt, SAlterTableStmt* p
          pStmt->alterType == TSDB_ALTER_TABLE_UPDATE_TAG_BYTES)) {
       return generateSyntaxErrMsg(&pCxt->msgBuf, TSDB_CODE_PAR_ONLY_ONE_JSON_TAG);
     }
+    if (pStmt->alterType == TSDB_ALTER_TABLE_UPDATE_OPTIONS && -1 != pStmt->pOptions->ttl) {
+      return generateSyntaxErrMsg(&pCxt->msgBuf, TSDB_CODE_PAR_INVALID_ALTER_TABLE);
+    }
     return TSDB_CODE_SUCCESS;
   } else if (TSDB_CHILD_TABLE != pTableMeta->tableType && TSDB_NORMAL_TABLE != pTableMeta->tableType) {
     return generateSyntaxErrMsg(&pCxt->msgBuf, TSDB_CODE_PAR_INVALID_ALTER_TABLE);
diff --git a/source/libs/tdb/inc/tdb.h b/source/libs/tdb/inc/tdb.h
index 5912fd800c92805013cb79cb967040a8e73c8af2..628bf6d7aa594e8cb18d68ec3f36b6ce273a08ce 100644
--- a/source/libs/tdb/inc/tdb.h
+++ b/source/libs/tdb/inc/tdb.h
@@ -58,6 +58,7 @@ int32_t tdbTbcMoveToPrev(TBC *pTbc);
 int32_t tdbTbcGet(TBC *pTbc, const void **ppKey, int *pkLen, const void **ppVal, int *pvLen);
 int32_t tdbTbcDelete(TBC *pTbc);
 int32_t tdbTbcNext(TBC *pTbc, void **ppKey, int *kLen, void **ppVal, int *vLen);
+int32_t tdbTbcPrev(TBC *pTbc, void **ppKey, int *kLen, void **ppVal, int *vLen);
 int32_t tdbTbcUpsert(TBC *pTbc, const void *pKey, int nKey, const void *pData, int nData, int insert);
 
 // TXN
diff --git a/source/libs/tdb/src/db/tdbBtree.c b/source/libs/tdb/src/db/tdbBtree.c
index fffda68731cb15da91669c72913f776cb67496ca..9368706378d22269f7b8b2376c8e12575520effb 100644
--- a/source/libs/tdb/src/db/tdbBtree.c
+++ b/source/libs/tdb/src/db/tdbBtree.c
@@ -1245,6 +1245,52 @@ int tdbBtreeNext(SBTC *pBtc, void **ppKey, int *kLen, void **ppVal, int *vLen) {
   return 0;
 }
 
+int tdbBtreePrev(SBTC *pBtc, void **ppKey, int *kLen, void **ppVal, int *vLen) {
+  SCell       *pCell;
+  SCellDecoder cd;
+  void        *pKey, *pVal;
+  int          ret;
+
+  // current cursor points to an invalid position
+  if (pBtc->idx < 0) {
+    return -1;
+  }
+
+  pCell = tdbPageGetCell(pBtc->pPage, pBtc->idx);
+
+  tdbBtreeDecodeCell(pBtc->pPage, pCell, &cd);
+
+  pKey = tdbRealloc(*ppKey, cd.kLen);
+  if (pKey == NULL) {
+    return -1;
+  }
+
+  *ppKey = pKey;
+  *kLen = cd.kLen;
+  memcpy(pKey, cd.pKey, cd.kLen);
+
+  if (ppVal) {
+    // TODO: vLen may be zero
+    pVal = tdbRealloc(*ppVal, cd.vLen);
+    if (pVal == NULL) {
+      tdbFree(pKey);
+      return -1;
+    }
+
+    *ppVal = pVal;
+    *vLen = cd.vLen;
+    memcpy(pVal, cd.pVal, cd.vLen);
+  }
+
+  ret = tdbBtcMoveToPrev(pBtc);
+  if (ret < 0) {
+    ASSERT(0);
+    return -1;
+  }
+
+  return 0;
+}
+
 int tdbBtcMoveToNext(SBTC *pBtc) {
   int    nCells;
   int    ret;
diff --git a/source/libs/tdb/src/db/tdbTable.c b/source/libs/tdb/src/db/tdbTable.c
index 239aa5d7ef786b0941e857bf9e3f73a655f65d5a..1575f9f206d3dd6b77eec6e61a5840e47efedc4b 100644
--- a/source/libs/tdb/src/db/tdbTable.c
+++ b/source/libs/tdb/src/db/tdbTable.c
@@ -132,6 +132,10 @@ int tdbTbcNext(TBC *pTbc, void **ppKey, int *kLen, void **ppVal, int *vLen) {
   return tdbBtreeNext(&pTbc->btc, ppKey, kLen, ppVal, vLen);
 }
 
+int tdbTbcPrev(TBC *pTbc, void **ppKey, int *kLen, void **ppVal, int *vLen) {
+  return tdbBtreePrev(&pTbc->btc, ppKey, kLen, ppVal, vLen);
+}
+
 int tdbTbcUpsert(TBC *pTbc, const void *pKey, int nKey, const void *pData, int nData, int insert) {
   return tdbBtcUpsert(&pTbc->btc, pKey, nKey, pData, nData, insert);
 }
diff --git a/source/libs/tdb/src/inc/tdbInt.h b/source/libs/tdb/src/inc/tdbInt.h
index 6524e3c9bcd873180378b5cfea2404b1a461ac7b..71e009cabfef8ea27a72381e09126cefa3fe7734 100644
--- a/source/libs/tdb/src/inc/tdbInt.h
+++ b/source/libs/tdb/src/inc/tdbInt.h
@@ -156,6 +156,7 @@ int tdbBtcMoveToLast(SBTC *pBtc);
 int tdbBtcMoveToNext(SBTC *pBtc);
 int tdbBtcMoveToPrev(SBTC *pBtc);
 int tdbBtreeNext(SBTC *pBtc, void **ppKey, int *kLen, void **ppVal, int *vLen);
+int tdbBtreePrev(SBTC *pBtc, void **ppKey, int *kLen, void **ppVal, int *vLen);
 int tdbBtcGet(SBTC *pBtc, const void **ppKey, int *kLen, const void **ppVal, int *vLen);
 int tdbBtcDelete(SBTC *pBtc);
 int tdbBtcUpsert(SBTC *pBtc, const void *pKey, int kLen, const void *pData, int nData, int insert);