From 81297785e1e0cd0cfb5bbee2e44a3e6da3c363dd Mon Sep 17 00:00:00 2001
From: Aleksander Machniak <alec@alec.pl>
Date: Sun, 05 Jan 2014 04:34:18 -0500
Subject: [PATCH] Merge branch 'master' of github.com:roundcube/roundcubemail
---
program/lib/Roundcube/rcube_db_mysql.php | 46 ++++++++++++++++++++++++++++++++++++++++++++--
1 files changed, 44 insertions(+), 2 deletions(-)
diff --git a/program/lib/Roundcube/rcube_db_mysql.php b/program/lib/Roundcube/rcube_db_mysql.php
index 2d42610..d3d0ac5 100644
--- a/program/lib/Roundcube/rcube_db_mysql.php
+++ b/program/lib/Roundcube/rcube_db_mysql.php
@@ -30,9 +30,13 @@
public $db_provider = 'mysql';
/**
- * Driver initialization/configuration
+ * Object constructor
+ *
+ * @param string $db_dsnw DSN for read/write operations
+ * @param string $db_dsnr Optional DSN for read only operations
+ * @param bool $pconn Enables persistent connections
*/
- protected function init()
+ public function __construct($db_dsnw, $db_dsnr = '', $pconn = false)
{
if (version_compare(PHP_VERSION, '5.3.0', '<')) {
rcube::raise_error(array('code' => 600, 'type' => 'db',
@@ -41,9 +45,22 @@
true, true);
}
+ parent::__construct($db_dsnw, $db_dsnr, $pconn);
+
// SQL identifiers quoting
$this->options['identifier_start'] = '`';
$this->options['identifier_end'] = '`';
+ }
+
+ /**
+ * Driver-specific configuration of database connection
+ *
+ * @param array $dsn DSN for DB connections
+ * @param PDO $dbh Connection handler
+ */
+ protected function conn_configure($dsn, $dbh)
+ {
+ $dbh->query("SET NAMES 'utf8'");
}
/**
@@ -162,4 +179,29 @@
return isset($this->variables[$varname]) ? $this->variables[$varname] : $default;
}
+ /**
+ * Handle DB errors, re-issue the query on deadlock errors from InnoDB row-level locking
+ *
+ * @param string Query that triggered the error
+ * @return mixed Result to be stored and returned
+ */
+ protected function handle_error($query)
+ {
+ $error = $this->dbh->errorInfo();
+
+ // retry after "Deadlock found when trying to get lock" errors
+ $retries = 2;
+ while ($error[1] == 1213 && $retries >= 0) {
+ usleep(50000); // wait 50 ms
+ $result = $this->dbh->query($query);
+ if ($result !== false) {
+ return $result;
+ }
+ $error = $this->dbh->errorInfo();
+ $retries--;
+ }
+
+ return parent::handle_error($query);
+ }
+
}
--
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