diff --git a/source/libs/tdb/src/db/tdbBtree.c b/source/libs/tdb/src/db/tdbBtree.c
index d35d6a7abd5026c259201f8bf0d471f5da6379da..a3d8c3f53bedd9bcc2ed2099a08505ae784c030e 100644
--- a/source/libs/tdb/src/db/tdbBtree.c
+++ b/source/libs/tdb/src/db/tdbBtree.c
@@ -15,6 +15,29 @@
 
 #include "tdbInt.h"
 
+struct SBTree {
+  SPgno   root;
+  int     keyLen;
+  int     valLen;
+  SPFile *pFile;
+  int (*FKeyComparator)(const void *pKey1, int keyLen1, const void *pKey2, int keyLen2);
+};
+
+struct SBtCursor {
+  SBTree *pBt;
+};
+
+int tdbBtreeOpen(SPgno root, SBTree **ppBt) {
+  *ppBt = NULL;
+  /* TODO */
+  return 0;
+}
+
+int tdbBtreeClose(SBTree *pBt) {
+  // TODO
+  return 0;
+}
+
 #if 0
 struct SBtCursor {
   SBTree *pBtree;
diff --git a/source/libs/tdb/src/db/tdbEnv.c b/source/libs/tdb/src/db/tdbEnv.c
index 0f096ce6648dffa38aaf4b9dff13556f7fc70cee..96427f14304876b11c4ca7800b62e570be873e4f 100644
--- a/source/libs/tdb/src/db/tdbEnv.c
+++ b/source/libs/tdb/src/db/tdbEnv.c
@@ -21,7 +21,7 @@ struct STEnv {
   SPCache *pCache;
 };
 
-int tdbEnvOpen(const char *rootDir, STEnv **ppEnv) {
+int tdbEnvOpen(const char *rootDir, int pageSize, int cacheSize, STEnv **ppEnv) {
   STEnv *  pEnv;
   int      dsize;
   int      zsize;
@@ -43,6 +43,10 @@ int tdbEnvOpen(const char *rootDir, STEnv **ppEnv) {
   memcpy(pEnv->rootDir, rootDir, dsize);
   pEnv->rootDir[dsize] = '\0';
 
+  pEnv->jfd = -1;
+
+  tdbPCacheOpen(pageSize, cacheSize, 0, &(pEnv->pCache));
+
   *ppEnv = pEnv;
   return 0;
 }
diff --git a/source/libs/tdb/src/db/tdbPCache.c b/source/libs/tdb/src/db/tdbPCache.c
index 4691a46bb828485a7fee6c3f019684115f17ee05..d2b893c85aa7ac0a6287f35405be008915d7b711 100644
--- a/source/libs/tdb/src/db/tdbPCache.c
+++ b/source/libs/tdb/src/db/tdbPCache.c
@@ -89,7 +89,7 @@ SPgHdr *tdbPCacheFetch(SPCache *pCache, const SPgid *pPgid, bool alcNewPage) {
   return pPage;
 }
 
-void tdbFetchFinish(SPCache *pCache, SPgHdr *pPage) {
+void tdbPCacheFetchFinish(SPCache *pCache, SPgHdr *pPage) {
   // TODO
 }
 
diff --git a/source/libs/tdb/src/inc/tdbEnv.h b/source/libs/tdb/src/inc/tdbEnv.h
index 04f91c6487f04c917b87009627f9872e2a13aaaf..a45745b4a08efbc81c940c8099f6996c81df2ec3 100644
--- a/source/libs/tdb/src/inc/tdbEnv.h
+++ b/source/libs/tdb/src/inc/tdbEnv.h
@@ -22,7 +22,7 @@ extern "C" {
 
 typedef struct STEnv STEnv;
 
-int tdbEnvOpen(const char *rootDir, STEnv **ppEnv);
+int tdbEnvOpen(const char *rootDir, int pageSize, int cacheSize, STEnv **ppEnv);
 int tdbEnvClose(STEnv *pEnv);
 
 int tdbEnvBegin(STEnv *pEnv);
diff --git a/source/libs/tdb/src/inc/tdbPCache.h b/source/libs/tdb/src/inc/tdbPCache.h
index 4474a603a44f05ad26c160ac167ba280263786bb..b54381579988a491ab35470f082908309e92d5d4 100644
--- a/source/libs/tdb/src/inc/tdbPCache.h
+++ b/source/libs/tdb/src/inc/tdbPCache.h
@@ -39,7 +39,7 @@ struct SPgHdr {
 int     tdbPCacheOpen(int pageSize, int cacheSize, int extraSize, SPCache **ppCache);
 int     tdbPCacheClose(SPCache *pCache);
 SPgHdr *tdbPCacheFetch(SPCache *pCache, const SPgid *pPgid, bool alcNewPage);
-void    tdbFetchFinish(SPCache *pCache, SPgHdr *pPage);
+void    tdbPCacheFetchFinish(SPCache *pCache, SPgHdr *pPage);
 void    tdbPCacheRelease(SPgHdr *pHdr);
 
 #ifdef __cplusplus
diff --git a/source/libs/tdb/src/inc/tdbPFile.h b/source/libs/tdb/src/inc/tdbPFile.h
index a6b4620f142a6cc040db22020590f92147162d1a..e1133b99512c3653fc282a4fe609ea26299494ef 100644
--- a/source/libs/tdb/src/inc/tdbPFile.h
+++ b/source/libs/tdb/src/inc/tdbPFile.h
@@ -22,11 +22,12 @@ extern "C" {
 
 typedef struct SPFile SPFile;
 
-int tdbPFileOpen(SPCache *pCache, const char *fileName, SPFile **ppFile);
-int tdbPFileClose(SPFile *pFile);
-int tdbPFileBegin(SPFile *pFile);
-int tdbPFileCommit(SPFile *pFile);
-int tdbPFileRollback(SPFile *pFile);
+int   tdbPFileOpen(SPCache *pCache, const char *fileName, SPFile **ppFile);
+int   tdbPFileClose(SPFile *pFile);
+void *tdbPFileGet(SPFile *pFile, SPgno pgno);
+int   tdbPFileBegin(SPFile *pFile);
+int   tdbPFileCommit(SPFile *pFile);
+int   tdbPFileRollback(SPFile *pFile);
 
 #ifdef __cplusplus
 }