diff --git a/source/libs/tdb/src/db/tdbBtree.c b/source/libs/tdb/src/db/tdbBtree.c
index 3c079b1b26fe697b469607c0374550d48c084bc8..11c293af74ccba2ccab4739e85e30492e028d525 100644
--- a/source/libs/tdb/src/db/tdbBtree.c
+++ b/source/libs/tdb/src/db/tdbBtree.c
@@ -63,7 +63,7 @@ static int tdbBtCursorMoveToRoot(SBtCursor *pCur);
 static int tdbInitBtPage(SPage *pPage, SBtPage **ppBtPage);
 static int tdbCompareKeyAndCell(const void *pKey, int kLen, const void *pCell);
 
-int tdbBtreeOpen(SPgno root, SBTree **ppBt) {
+int tdbBtreeOpen(SBTree **ppBt) {
   *ppBt = NULL;
   /* TODO */
   return 0;
diff --git a/source/libs/tdb/src/db/tdbDb.c b/source/libs/tdb/src/db/tdbDb.c
index e5c6e19163df423f3c0dcae8864370eb6b82ff50..a0c9939ad92b3fba6307fe1f6235572b1b9d3b99 100644
--- a/source/libs/tdb/src/db/tdbDb.c
+++ b/source/libs/tdb/src/db/tdbDb.c
@@ -23,6 +23,7 @@ struct STDb {
 int tdbDbOpen(const char *fname, int keyLen, int valLen, FKeyComparator keyCmprFn, STEnv *pEnv, STDb **ppDb) {
   STDb *  pDb;
   SPFile *pFile;
+  int     ret;
 
   *ppDb = NULL;
 
@@ -31,8 +32,15 @@ int tdbDbOpen(const char *fname, int keyLen, int valLen, FKeyComparator keyCmprF
     return -1;
   }
 
+  // pDb->pEnv
   pDb->pEnv = pEnv;
 
+  // pDb->pBt
+  ret = tdbBtreeOpen(&(pDb->pBt));
+  if (ret < 0) {
+    return -1;
+  }
+
   *ppDb = pDb;
   return 0;
 }
diff --git a/source/libs/tdb/src/inc/tdbBtree.h b/source/libs/tdb/src/inc/tdbBtree.h
index a2890b4cd4c50c3d6ce9555a7eec92cf2bbaefb8..0961ac1664bd16a8b968480c551ec4f0a8c96a98 100644
--- a/source/libs/tdb/src/inc/tdbBtree.h
+++ b/source/libs/tdb/src/inc/tdbBtree.h
@@ -23,6 +23,8 @@ extern "C" {
 typedef struct SBTree    SBTree;
 typedef struct SBtCursor SBtCursor;
 
+int tdbBtreeOpen(SBTree **ppBt);
+int tdbBtreeClose(SBTree *pBt);
 int tdbBtCursorInsert(SBtCursor *pCur, const void *pKey, int kLen, const void *pVal, int vLen);
 
 #ifdef __cplusplus