I have several tables in a deployed database in which the primary key is of type int, and autoincrements by 1 each time a record is added. My question is, since ints are 32-bit, what happens when its value reaches 4,294,967,296? I know that seems like an extrememly large amount of records, but when we imported the data into the database it started at key value 1,000,000. I don't know how to make it use lower numbers which are currently not being used (numbers below 1,000,000), and I am worried I will have problems when I reach the upper bound. What kind of problems could this cause? Should I change the primary key's type?
Thanks!
the upper bound is somewhere around 2.1 bill. Yes when you reach that limit your application will fail. You cannot insert any new data. You could put some alert in place to identify or predict when the storm is coming. you could create a job that gets the MAX(ID) every week and you can monitor the growth of the table. Once the ID reaches closer to 2 bil you can increase your frequency of monitoring. To fix it, you need modify the column and change it to BigInt. Please do not even bother to try ALTER TABLE...ALTER COLUMN...the server will hang.|||Ok, I'll just modify the primary key type. Thanks for the response.sql
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