diff --git a/ext_open/searcher.py b/ext_open/searcher.py
index 62a5064..5195067 100644
--- a/ext_open/searcher.py
+++ b/ext_open/searcher.py
@@ -10,16 +10,22 @@ DB_PATH = osp.join(osp.dirname(__file__),'ext.db')
 ext_database = sqlite3.connect(DB_PATH)
 def init_db():
     cur = ext_database.cursor()
-    cur.execute('CREATE TABLE IF NOT EXISTS updates ( `ext` TET, `update_time` INTEGER, `file_count` INTEGER);')
+    cur.execute('CREATE TABLE IF NOT EXISTS updates ( `ext` TEXT, `update_time` INTEGER, `file_count` INTEGER);')
 def regexp(expr, item):
     return re.search(expr,item) is not None
+def _in(expr,item):
+    return (1 if item in expr else 0)
 ext_database.create_function("REGEXP", 2, regexp)
+ext_database.create_function("INSIDE", 2, _in)
+
 class Searcher:
+
     def __init__(self,ext):
         self.cur = ext_database.cursor()
         self.ext = ext
         self.index = '{}_index'.format(ext)
         self.__init_table__()
+
     def __init_table__(self):
         self.cur.execute('CREATE TABLE IF NOT EXISTS {} (`name` TEXT,`fullpath` TEXT, `update_time` INTEGER,UNIQUE(name,fullpath));'.format(self.ext))
         self.cur.execute('CREATE INDEX IF NOT EXISTS {} ON {} ( `name`, `fullpath` )'.format(self.index,self.ext))
@@ -28,6 +34,7 @@ class Searcher:
             {'ext':self.ext}
             )
         self.commit()
+
     def update(self,update_mtimes):
         self.cur.execute('SELECT MAX(update_time) FROM updates WHERE ext=?;',[self.ext])
         last_update = self.cur.fetchone()[0]
@@ -42,22 +49,32 @@ class Searcher:
         self.cur.executemany('INSERT OR IGNORE INTO {} VALUES (?,?,?)'.format(self.ext),(row + [_time] for row in files))
         self.cur.execute('INSERT INTO updates VALUES (?, ?, ?)',[self.ext,_time,len(files)])
         self.commit()
+
     def commit(self):
         ext_database.commit()
+
     def close(self):
         ext_database.close()
-    def search(query,regex=False):
+
+    def search(self,query,regex=False):
         if regex:
-            self.cur.execute('SELECT * FROM ? WHERE name REGEXP ?;',[self.ext,query])
+            self.cur.execute('SELECT name,fullpath FROM {} WHERE name REGEXP ?;'.format(self.ext),[query])
         else:
-            self.cur.execute('SELECT * FROM ? WHERE name LIKE ?;',[self.ext,query])
+            self.cur.execute('SELECT name,fullpath FROM {} WHERE INSIDE(name,?)=1;'.format(self.ext),[query])
         return self.cur.fetchall()
+
     def clean(self,backhistory):
-        self.cur.execute('SELECT update_time FROM updates WHERE ext=? ORDER BY update_time DESC LIMIT ?;',[backhistory+1])
+        self.cur.execute('SELECT update_time FROM updates WHERE ext=? ORDER BY update_time DESC LIMIT ?;',[self.ext,backhistory+1])
         res = self.cur.fetchall()
         threshold = res[-1][0]
-        cur.execute('DELETE FROM {} WHERE update_time < ?;'.format(self.ext),[threshold])
+        self.cur.execute('DELETE FROM {} WHERE update_time < ?;'.format(self.ext),[threshold])
+        self.commit()
+
+    def clear(self):
+        self.cur.execute('DELETE FROM {};'.format(self.ext))
+        self.commit()
+
 if __name__ == "__main__":
     init_db()
     s = Searcher('py')
-    s.update(True)
\ No newline at end of file
+    # s.update(True)
\ No newline at end of file
diff --git a/ext_open/update.py b/ext_open/update.py
index d41ca1d..d2368fa 100644
--- a/ext_open/update.py
+++ b/ext_open/update.py
@@ -47,7 +47,7 @@ def build_ext(ext,paths):
     for path in paths:
         if path.endswith(ext):
             name = osp.basename(path)
-            ret.append([name,path])   
+            ret.append([name,path])
     return ret
 
 def update(ext,starts,after,do_update_mtimes = False):