From a484328df2f6c4477b145069f86e24741760136a Mon Sep 17 00:00:00 2001
From: Marcel Werk <burntime@woltlab.com>
Date: Tue, 2 Sep 2014 20:01:50 +0200
Subject: [PATCH] Improved importer performance

---
 .../system/exporter/AbstractExporter.class.php  | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/wcfsetup/install/files/lib/system/exporter/AbstractExporter.class.php b/wcfsetup/install/files/lib/system/exporter/AbstractExporter.class.php
index 3cb263c3ea..54082eea0a 100644
--- a/wcfsetup/install/files/lib/system/exporter/AbstractExporter.class.php
+++ b/wcfsetup/install/files/lib/system/exporter/AbstractExporter.class.php
@@ -181,4 +181,21 @@ abstract class AbstractExporter implements IExporter {
 		
 		return true;
 	}
+	
+	/**
+	 * Gets the max value of a specific column.
+	 * 
+	 * @param	string		$tableName
+	 * @param	string		$columnName
+	 * @return	integer
+	 */
+	protected function __getMaxID($tableName, $columnName) {
+		$sql = "SELECT	MAX(".$columnName.") AS maxID
+			FROM	".$tableName;
+		$statement = $this->database->prepareStatement($sql);
+		$statement->execute();
+		$row = $statement->fetchArray();
+		if ($row !== false) return $row['maxID'];
+		return 0;
+	} 
 }
-- 
2.20.1