diff --git a/CryptoPrice/retrievers/MetaRetriever.py b/CryptoPrice/retrievers/MetaRetriever.py
index ea3e1e4..f408b29 100644
--- a/CryptoPrice/retrievers/MetaRetriever.py
+++ b/CryptoPrice/retrievers/MetaRetriever.py
@@ -103,9 +103,6 @@ def get_path_prices(self, asset: str, ref_asset: str, timestamp: int,
         :return: Metaprice reflecting the value calculated through a trading path
         :rtype: Optional[MetaPrice]
         """
-        if asset == ref_asset:
-            yield MetaPrice(1, asset, ref_asset, [], source=set('',))
-            return
         if preferred_assets is None:
             preferred_assets = ['BTC', 'ETH']
 
diff --git a/CryptoPrice/storage/DataBase.py b/CryptoPrice/storage/DataBase.py
index bc10d7c..e7563d5 100644
--- a/CryptoPrice/storage/DataBase.py
+++ b/CryptoPrice/storage/DataBase.py
@@ -140,23 +140,11 @@ def drop_table(self, table: Union[Table, str]):
         :return: None
         :rtype: None
         """
-        self.drop_tables([table])
-
-    def drop_tables(self, tables: List[Union[Table, str]]):
-        """
-        Delete a list of tables if they exist
-
-        :param tables: list of tables to delete
-        :type tables: List[Union[Table, str]]
-        :return: None
-        :rtype: None
-        """
-        for table in tables:
-            if isinstance(table, Table):
-                table = table.name
-            execution_order = f"DROP TABLE IF EXISTS {table}"
-            self.db_cursor.execute(execution_order)
-        self.commit()
+        if isinstance(table, Table):
+            table = table.name
+        execution_order = f"DROP TABLE IF EXISTS {table}"
+        self.db_cursor.execute(execution_order)
+        self.db_conn.commit()
 
     def drop_all_tables(self):
         """
@@ -165,12 +153,14 @@ def drop_all_tables(self):
         :return: None
         :rtype: None
         """
-        tables = [t[1] for t in self.get_tables_descriptions()]
-        self.drop_tables(tables)
+        tables_desc = self.get_all_tables()
+        for table_desc in tables_desc:
+            self.drop_table(table_desc[1])
+        self.commit()
 
-    def get_tables_descriptions(self) -> List[Tuple]:
+    def get_all_tables(self) -> List[Tuple]:
         """
-        return the descriptions of all the tables  existing in the database
+        return all the tables existing in the database
 
         :return: tables descriptions
         :rtype: List[Tuple]
diff --git a/CryptoPrice/storage/KlineDataBase.py b/CryptoPrice/storage/KlineDataBase.py
index dc4475d..5109544 100644
--- a/CryptoPrice/storage/KlineDataBase.py
+++ b/CryptoPrice/storage/KlineDataBase.py
@@ -187,14 +187,3 @@ def add_cache_closest(self, asset: str, ref_asset: str, timeframe: TIMEFRAME, ti
         row = (timestamp, closest_timestamp, window)
         self.add_row(table, row, update_if_exists=True)
 
-    def drop_cache_tables(self):
-        """
-        Delete all the cache tables stored in the database
-
-        :return: None
-        :rtype: None
-        """
-        tables = [t[1] for t in self.get_tables_descriptions()]
-        tables = [table for table in tables if table.endswith('_cache')]
-        self.drop_tables(tables)
-