#38001 [NEW]: In PDO mysql running multiple queries with one exec, subsequent query fails

From: mark-phpbugs at vectrex dot org dot uk Operating system: Linux PHP version: 5.1.4 PHP Bug Type: PDO related Bug description: In PDO mysql running multiple queries with one exec, subsequent query fails Description: ------------ When running multiple queries with one exec, the queries succeed (or appear to succeed, with no exception), but a subsequent query fails with 2013 Lost connection to MySQL server during query I'm using MySQL 5.0.20a-Debian_2-log on Debian Linux. Client library version is "PDO Driver for MySQL, client library version => 5.0.22" This is similar to "bogus" bug #37732 which affects mysqli - But in PDO there is no way to manually "consume" the empty result sets from an exec() - PDO should really do it automatically. Reproduce code: --------------- <?php error_reporting(E_ALL); function DbInit() { global $db; $options = array(); $connstr = "mysql:host=localhost;dbname=test"; $db = new PDO($connstr, "root", "", $options); $db->setAttribute(PDO::ATTR_ERRMODE,PDO::ERRMODE_EXCEPTION); // Make sure our connections use utf8. $db->exec("SET NAMES utf8"); } function TestBatch() { global $db; $sql = "CREATE TEMPORARY table b (t varchar(20))"; $sql2 = " INSERT INTO b VALUES ('hello')"; /* This works $db->exec($sql); $db->exec($sql2); */ /* This fails because the subsequent query gives 2013 Lost connection to MySQL server during query */ $db->exec($sql . ";" . $sql2); $sth = $db->query("SELECT * FROM b"); var_dump($sth->fetchAll(PDO::FETCH_ASSOC)); } DbInit(); TestBatch(); ?> Expected result: ---------------- array(1) { [0]=> array(1) { ["t"]=> string(5) "hello" } } Actual result: -------------- Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[HY000]: General error: 2013 Lost connection to MySQL server during query' in /home/mark/progs/phptest/pdobatch.php:30 Stack trace: #0 /home/mark/progs/phptest/pdobatch.php(30): PDO->query('SELECT * FROM b') #1 /home/mark/progs/phptest/pdobatch.php(35): TestBatch() #2 {main} thrown in /home/mark/progs/phptest/pdobatch.php on line 30 -- Edit bug report at http://bugs.php.net/?id=38001&edit=1 -- Try a CVS snapshot (PHP 4.4): http://bugs.php.net/fix.php?id=38001&r=trysnapshot44 Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=38001&r=trysnapshot52 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=38001&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=38001&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=38001&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=38001&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=38001&r=needscript Try newer version: http://bugs.php.net/fix.php?id=38001&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=38001&r=support Expected behavior: http://bugs.php.net/fix.php?id=38001&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=38001&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=38001&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=38001&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=38001&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=38001&r=dst IIS Stability: http://bugs.php.net/fix.php?id=38001&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=38001&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=38001&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=38001&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=38001&r=mysqlcfg