我有大型 MySQL 数据库。我想一次获取 100 行,直到处理完所有数据库。
protected function doEcho($msg){
static $time, $start;
if (!$start) $start = time();
if (time() - $time > 0) {
echo $msg . "\n\n";
$time = time();
}
}
// ZF2 action
public function stuffAction() {
$request = $this->getRequest();
if (!$request instanceof ConsoleRequest){
throw new \RuntimeException('You can only use this action from a console!');
}
// Propel ORM generated Model UserQuery
$q = \UserQuery::create()->limit(100)->filterByProcessed(0);
$users = $q->find();
while ($users->count() ) {
foreach ($users as $user) {
$id = $user->getId();
$email = $user->getEmail();
$password = $user->getPassword();
$this->doEcho("$id - $email - $password");
// do stuff and set processed to 1
}
$q = \UserQuery::create()->limit(100)->filterByProcessed(0);
$users = $q->find();
}
}
我收到以下异常:
================================================== =======================
应用程序抛出异常!
Propel\Runtime\Exception\PropelException
无法执行 SELECT 语句 [SELECT user.ID, user.EMAIL, user.PASSWORD, user.PHONE, user.IP, user.PROCESSED, user.WHEN FROM user
WHERE user.PROCESSED =:p1 限制 100]
//调试回溯
================================================== =======================
之前的异常:
PDO异常
SQLSTATE[42000]:语法错误或访问冲突:1461 无法创建超过 max_prepared_stmt_count 语句(当前值:16382)
//调试回溯
显然,原因是:
An application connecting to the database was preparing sql statements, executing them, then not closing them.
如何让 Propel 关闭语句?我确实使用 Propel 2: "propel/propel": "2.0.*@dev"
最佳答案
已解决:
use Propel\Runtime\Propel;
use Propel\Runtime\Connection\ConnectionWrapper;
// ...
Propel::getServiceContainer()
// connection_name - connection from propel config
->getReadConnection('connection_name')
->setAttribute(ConnectionWrapper::PROPEL_ATTR_CACHE_PREPARES, true);
关于php - 推进 ORM : PDOException "Can' t create more than max_prepared_stmt_count statements",我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/25741447/