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The RAND(N) function where the N is a field of "constant" table (table of single row) failed with a SIGFPE. Evaluation of RAND(N) rely on constant status of its argument. Current server "seeded" random value for each constant argument only once, in the Item_func_rand::fix_fields method. Then the server skipped a call to seed_random() in the Item_func_rand::val_real method for such constant arguments. However, non-constant state of an argument may be changed after the call to fix_fields, if an argument is a field of "constant" table. Thus, pre-initialization of random value in the fix_fields method is too early. Initialization of random value by seed_random() has been removed from Item_func_rand::fix_fields method. The Item_func_rand::val_real method has been modified to call seed_random() on the first evaluation of this method if an argument is a function.
This is a release of MySQL, a dual-license SQL database server. MySQL is brought to you by the MySQL team at Sun Microsystems, Inc. License information can be found in these files: - For GPL (free) distributions, see the COPYING file and the EXCEPTIONS-CLIENT file. - For commercial distributions, see the LICENSE.mysql file. GPLv2 Disclaimer For the avoidance of doubt, except that if any license choice other than GPL or LGPL is available it will apply instead, Sun elects to use only the General Public License version 2 (GPLv2) at this time for any software where a choice of GPL license versions is made available with the language indicating that GPLv2 or any later version may be used, or where a choice of which version of the GPL is applied is otherwise unspecified. For further information about MySQL or additional documentation, see: - The latest information about MySQL: http://www.mysql.com - The current MySQL documentation: http://dev.mysql.com/doc Some manual sections of special interest: - If you are migrating from an older version of MySQL, please read the "Upgrading from..." section first! - To see what MySQL can do, take a look at the features section. - For installation instructions, see the Installing and Upgrading chapter. - For the new features/bugfix history, see the Change History appendix. - For the currently known bugs/misfeatures (known errors) see the Problems and Common Errors appendix. - For a list of developers and other contributors, see the Credits appendix. A local copy of the MySQL Reference Manual can be found in the Docs directory in GNU Info format. You can also browse the manual online or download it in any of several formats at the URL given earlier in this file. ************************************************************ IMPORTANT: Bug or error reports should be sent to http://bugs.mysql.com.