diff --git a/source/libs/tdb/src/db/btree.c b/source/libs/tdb/src/db/btree.c
index e87a25c2c34ceaa78d0feb2fc1ec9eb8b31cd74d..7d42484488cc5cbb5a89bb0c86468ac25ff22455 100644
--- a/source/libs/tdb/src/db/btree.c
+++ b/source/libs/tdb/src/db/btree.c
@@ -16,6 +16,7 @@
 #include "tdbInt.h"
 
 struct SBTree {
+  pgno_t rootPage;
   // TODO
 };
 
diff --git a/source/libs/tdb/src/db/pgcache.c b/source/libs/tdb/src/db/pgcache.c
index 88d932ba22121e153f2ba9a365e3dd9025752d7e..fb9385af989aa8ef875fd6ef774905b961160b84 100644
--- a/source/libs/tdb/src/db/pgcache.c
+++ b/source/libs/tdb/src/db/pgcache.c
@@ -123,7 +123,9 @@ int pgCacheClose(SPgCache *pPgCache) {
 }
 
 SPage *pgCacheFetch(SPgCache *pPgCache, pgid_t pgid) {
-  // TODO
+  SPage *pPage;
+
+  // 1. Check if the page is cached
   return NULL;
 }
 
diff --git a/source/libs/tdb/src/db/pgfile.c b/source/libs/tdb/src/db/pgfile.c
index b98d10e6a6df1a30fc8a2d28eed76ccf67fe456d..15c18b2950c078f33459489d7d8243782a60ce8f 100644
--- a/source/libs/tdb/src/db/pgfile.c
+++ b/source/libs/tdb/src/db/pgfile.c
@@ -67,12 +67,22 @@ int pgFileClose(SPgFile *pPgFile) {
 }
 
 SPage *pgFileFetch(SPgFile *pPgFile, pgno_t pgno) {
-  // TODO
-  return NULL;
+  SPgCache *pPgCache;
+  SPage *   pPage;
+  pgid_t    pgid;
+
+  pPgCache = pPgFile->pPgCache;
+  pPage = NULL;
+  memcpy(pgid.fileid, pPgFile->fileid, TDB_FILE_ID_LEN);
+  pgid.pgno = pgno;
+
+  pPage = pgCacheFetch(pPgCache, pgid);
+
+  return pPage;
 }
 
 int pgFileRelease(SPage *pPage) {
-  // TODO
+  pgCacheRelease(pPage);
   return 0;
 }