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Locking a whole database while running queries


calabiyau

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Is there a way to do this?  I need to run a cron job that transfers database information from one database to another and it is very important that the primary keys don't get messed up.  I know you can lock a table but is there a way to lock a whole database while running a long series of queries that go back and forth between multiple tables?

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Okay I finally discovered GET_LOCK('$mydtb.mylock',10)

 

I've been testing it at home, by running the script with the lock in it but not releasing the lock.  Then I used a second script to try to access the same database and I am able to.  Would the lock not stay in effect?  Or does it end when the script ends?

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