对数据库中的每个“会话”使用新的SQL表

Question

I have this web application I'm developing for my major project, one of it features is messaging between registered users. The whole messaging system is created that every time when message is sent, new record in table conversations is created and new table in second database is created, table name is made from id of both users and conversation id. In this table whole conversation between two ppl is stored.

My question is, is this good approach or creating tables at my database on daily basis would be to much for server to handle?

Answer 1

Creating new tables based on request is never a good idea. You could create a table which connects user_ids to a conversation:

conversations:
id : 2348
started_at: 2013-03-28 17:13:00

user_conversations:
id        : 538
conversation_id: 2348
message   : "Hey Jakub, how are you?"
user_id   : 5831
posted_at : 2013-03-28 17:14:50

id        : 539
conversation_id: 2348
message   : "Hey Anyone, I'm fine, how are you?"
user_id   : 95234
posted_at : 2013-03-28 17:15:30

etc.

id: PK, key on user_id

You might want to play around with keys tho, but this is a nice setup for this. You will connect messages to a user and a coversation. This way a conversation is not limited to 2 users either.