ID: 36347 User updated by: david at acz dot org Reported By: david at acz dot org -Status: Bogus +Status: Open Bug Type: PDO related Operating System: SuSE Linux 9.3 PHP Version: 5.1.2 Assigned To: george New Comment:
See my previous comment. There is no way to execute "OPTIMIZE TABLE" with MySQL using PDO. Previous Comments: ------------------------------------------------------------------------ [2006-02-14 15:13:23] [EMAIL PROTECTED] Thank you for taking the time to write to us, but this is not a bug. Please double-check the documentation available at http://www.php.net/manual/ and the instructions on how to report a bug at http://bugs.php.net/how-to-report.php exec() method is intended only for one time execution of queries that do not return any records. There is no bug here. ------------------------------------------------------------------------ [2006-02-10 15:18:11] [EMAIL PROTECTED] Assigned to the maintainer. ------------------------------------------------------------------------ [2006-02-10 02:34:48] david at acz dot org This bug is similar to #34499. I can't comment on that, so I'm commenting here: "OPTIMIZE TABLE is a query that returns rows. You should use PDO::query() instead. I'll see about handling this user error more gracefully." You actually can't use PDO::query() with OPTIMIZE TABLE: HY000:2030:This command is not supported in the prepared statement protocol yet What is the solution? ------------------------------------------------------------------------ [2006-02-10 01:24:25] david at acz dot org Description: ------------ [Note: I am actually testing this on PHP 5.1.1. If this bug was fixed in PHP 5.1.2, please add a note to the manual page for PDO::exec()]. The manual says: "PDO::exec() does not return results from a SELECT statement. For a SELECT statement that you only need to issue once during your program, consider issuing PDO::query()." Either the manual needs to be changed, or, ideally, PDO::exec() needs to be fixed to discard results. This issue has bit me multiple times. It's easy to forget that a certain query (such as MySQL's OPTIMIZE TABLE) will return a result. Using PDO::exec() in such cases causes an error later that can be difficult to track down. Reproduce code: --------------- <? $db = new PDO("mysql:host=localhost;dbname=test"); $db->exec("SELECT 1"); $st = $db->prepare("SELECT NOW()"); if ($st === false) { $e = $db->errorInfo(); echo "$e[0]:$e[1]: $e[2]\n"; } ?> Expected result: ---------------- [nothing] Actual result: -------------- HY000:2014: Cannot execute queries while other unbuffered queries are active. Consider using PDOStatement::fetchAll(). Alternatively, if your code is only ever going to run against mysql, you may enable query buffering by setting the PDO::MYSQL_ATTR_USE_BUFFERED_QUERY attribute. ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=36347&edit=1
