[Farcaster]

It is notable that in MySQL v4.0 and on, TRUNCATE TABLE drops ALL ROWS, and does not take a WHERE clause. You also need to execute the queries and return the rows before using the results in another query. Even then, you are going to need to use explode to put them into a comma delimited string that you can use in the WHERE clause with IN. The easiest thing to do would probably be to execute a query to get all of the PMs you want to delete and then iterate through them and delete them using the PM datamanager. If you do it manually, you need to: 1) update the user table with the new post count, 2) delete the references in PM, and 3) delete the pm text from the pmtext table, BUT only if no other pm is referencing the same textid.