Question

Background:

I have a database table which is for received_msgs

The table has two columns

id, link_id

If The message is the first one in there (based on criteria) then its link_id is equal to its id.

If it is a reply to a message, its link_id is equal to the id of the message it is in reply to.

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Question:
is there any way on the initial insert to set link_id to be the same as the id?

At the moment I am doing the insert and then doing another query, an update, and setting the link_id to be equal to the INSERT_ID

But I dont like using two queries for it.

Answer 1

You could use trigger on AFTER INSERT action.

But I strongly recommend you to use NULL for the root of the adjacency list tree.