总结过滤超长文本

db/message_storage.py

@@ -34,6 +34,7 @@ class MessageStorageDB(BaseDBOperator):
           AND message_type in (1, 49)
           AND group_id = %s 
           AND length(content) > %s
+          AND CHAR_LENGTH(content) < 300
           AND content NOT LIKE '/%'
         """
         params = (hours_ago, group_id, min_content_length)