diff --git a/source/libs/tdb/inc/tdb.h b/source/libs/tdb/inc/tdb.h
index daffad3b7946f51eb74d48b4b500b4d1838abe0d..bc1eb06078faf45d2e7c96e36c8ab0bdd830f761 100644
--- a/source/libs/tdb/inc/tdb.h
+++ b/source/libs/tdb/inc/tdb.h
@@ -34,6 +34,8 @@ int tdbEnvCreate(TENV **ppEnv);
 int tdbEnvOpen(TENV **ppEnv);
 int tdbEnvClose(TENV *pEnv);
 
+int tdbEnvCommit(TENV *pEnv);
+
 int       tdbEnvSetPageSize(TENV *pEnv, pgsz_t szPage);
 int       tdbEnvSetCacheSize(TENV *pEnv, cachesz_t szCache);
 pgsz_t    tdbEnvGetPageSize(TENV *pEnv);
@@ -44,6 +46,14 @@ int tdbCreate(TDB **ppDb);
 int tdbOpen(TDB **ppDb, const char *fname, const char *dbname, TENV *pEnv);
 int tdbClose(TDB *pDb);
 
+int tdbSetKeyLen(TDB *pDb, int klen);
+int tdbSetValLen(TDB *pDb, int vlen);
+int tdbSetDup(TDB *pDb, int dup);
+
+int tdbGetKeyLen(TDB *pDb, int *pklen);
+int tdbGetValLen(TDB *pDb, int *pvlen);
+int tdbGetDup(TDB *pDb, int *pdup);
+
 // TDBC
 
 #ifdef __cplusplus
diff --git a/source/libs/tdb/src/inc/btree.h b/source/libs/tdb/src/inc/btree.h
index 343093edc9c01ef70757af44a282396cd85ab268..f12184b3eb5f51f504d2b3d5419800a62d12e3c3 100644
--- a/source/libs/tdb/src/inc/btree.h
+++ b/source/libs/tdb/src/inc/btree.h
@@ -31,6 +31,7 @@ int btreeClose(SBTree *pBt);
 int btreeCursorOpen(SBtCursor *pBtCur, SBTree *pBt);
 int btreeCursorClose(SBtCursor *pBtCur);
 int btreeCursorMoveTo(SBtCursor *pBtCur, int kLen, const void *pKey);
+int btreeCursorNext(SBtCursor *pBtCur);
 
 struct SBTree {
   pgno_t root;
diff --git a/source/libs/tdb/src/inc/tdbInt.h b/source/libs/tdb/src/inc/tdbInt.h
index 5c532c23f25ba3953189dfaf0f32c0dd6ce78157..18ab940517d08deb01a81249afcedd0be641a593 100644
--- a/source/libs/tdb/src/inc/tdbInt.h
+++ b/source/libs/tdb/src/inc/tdbInt.h
@@ -93,6 +93,19 @@ typedef TD_DLIST(SPgFile) SPgFileList;
     }                             \
   } while (0)
 
+#define TDB_VARIANT_LEN -1
+
+#define TDB_DECODE_PAYLOAD(pPayload, keyLen, pKey, valLen, pVal) \
+  do {                                                           \
+    if ((keyLen) == TDB_VARIANT_LEN) {                           \
+      /* TODO */                                                 \
+    }                                                            \
+    if ((valLen) == TDB_VARIANT_LEN) {                           \
+      /* TODO */                                                 \
+    }                                                            \
+    /* TODO */                                                   \
+  } while (0)
+
 #include "tdbUtil.h"
 
 #include "btree.h"