Here is something queer: select ifnull(email, round(10000 * rand(), 1)) as ux, count(*) from nam group by ux; ERROR 1062 (23000): Duplicate entry '2514.0' for key 'group_key'
I have a name-list, with e-mail address or not. I wanted to fill the NULL e-mail addresses with something random, and, I hope, unique. (ROUND is there only to make that surprising error liklier.) The field "email" is not UNIQUE, not a key, no intention of making it such. Why this error? Is RAND called more than once for each record? I tryed also UUID, but that came with its own shortcoming: if the UUID call were the whole field, it indeed was once called for every record, but if argument to IFNULL, only once for the whole query. Version 5.5.8 -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/mysql
