Insert the lowest possible unique positve integer in an atomic fashion in MySql

Posted by Jason Christa on Stack Overflow See other posts from Stack Overflow or by Jason Christa
Published on 2010-04-14T19:17:42Z Indexed on 2010/04/14 19:43 UTC
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Say I have a table with a unique positive integer field. I currently have rows with id's of [1, 2, 3, 4, 5, 8, 12, 35]. Is there a insert query that I could write that would assign the id field to the lowest unique positive integer (in this case 6)? It would have to do this atomically so there isn't the possibility of concurrent inserts wiping out each other or failing.

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