Error handled cursors closing

app/cursors.py

@@ -60,7 +60,10 @@ async def get_cursors(cursor_id: str) -> CachedCursorOut:
 )
 async def close_all_cursor() -> None:
     for cached_cursor in mysql.cached_cursors.values():
+        try:
             await cached_cursor.close()
+        except Exception as e:
+            print(f"Error closing a cursor {e}")
     mysql.cached_cursors.clear()
 
 
@@ -73,8 +76,11 @@ async def close_cursor(cursor_id: str) -> None:
     cached_cursor = mysql.cached_cursors.get(cursor_id, None)
     if cached_cursor is None:
         raise CursorNotFound
-
+    try:
         await cached_cursor.close()
+    except Exception as e:
+        print(f"Error closing the cursor. e={e}")
+
     del mysql.cached_cursors[cursor_id]
 
 
@@ -83,11 +89,12 @@ async def close_cursor(cursor_id: str) -> None:
     dependencies=[Depends(get_current_user)],
     status_code=status.HTTP_200_OK,
 )
-async def cursor_push_ttl(cursor_id: str, new_ttl: int|None=None) -> CachedCursorOut:
+async def cursor_push_ttl(
+    cursor_id: str, new_ttl: int | None = None
+) -> CachedCursorOut:
     cached_cursor = mysql.cached_cursors.get(cursor_id, None)
     if cached_cursor is None:
         raise CursorNotFound
     cached_cursor.ttl = new_ttl if new_ttl else cached_cursor.ttl
     cached_cursor.close_at = cached_cursor.upgrade_close_at()
     return cached_cursor
-    

data/schemas.py

@@ -172,7 +172,7 @@ class SelectQueryInDB(SelectQueryIn):
 
 
 class SelectResultData(BaseModel):
-    columns: List[str]
+    columns: List[str] | str
     data: List[List[Any]]
 
 

dbs/mysql.py

@@ -24,8 +24,8 @@ async def close_old_cached_cursors():
             continue
 
         try:
-            await cursor.close()
             cached_cursors.pop(cursor_id, None)
+            await cursor.close()
             closed_cached_cursors[cursor_id] = cursor
             print(f"Closed cursor {cursor_id}")
         except Exception as e:
@@ -51,13 +51,18 @@ async def remove_old_closed_cached_cursors():
 async def cached_cursors_cleaner():
     global cached_cursors, closed_cached_cursors
     while True:
+        try:
             await close_old_cached_cursors()
+        except Exception as e:
+            print(f"Error closing some cached cursors, {e=}")
+        try:
             await remove_old_closed_cached_cursors()
+        except Exception as e:
+            print(f"Error removing closed cursors, {e=}")
         await asyncio.sleep(10)
 
 
 async def pool_creator(connection: Connection, minsize=5, maxsize=10):
-
     return await aiomysql.create_pool(
         host=connection.host,
         user=connection.username,