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msd2/tracking/piwik/core/Updates/2.0-a12.php

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+<?php
+/**
+ * Piwik - free/libre analytics platform
+ *
+ * @link http://piwik.org
+ * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
+ *
+ */
+namespace Piwik\Updates;
+
+use Piwik\Common;
+use Piwik\Db;
+use Piwik\Updater;
+use Piwik\Updates;
+use Piwik\Updater\Migration\Factory as MigrationFactory;
+
+/**
+ */
+class Updates_2_0_a12 extends Updates
+{
+    /**
+     * @var MigrationFactory
+     */
+    private $migration;
+
+    public function __construct(MigrationFactory $factory)
+    {
+        $this->migration = $factory;
+    }
+
+    public function getMigrations(Updater $updater)
+    {
+        $result = array(
+            $this->migration->db->sql('ALTER TABLE ' . Common::prefixTable('logger_message') . ' MODIFY level VARCHAR(16) NULL')
+        );
+
+        $unneededLogTables = array('logger_exception', 'logger_error', 'logger_api_call');
+        foreach ($unneededLogTables as $table) {
+            $tableName = Common::prefixTable($table);
+
+            try {
+                $rows = Db::fetchOne("SELECT COUNT(*) FROM $tableName");
+                if ($rows == 0) {
+                    $result[] = $this->migration->db->dropTable($table);
+                }
+            } catch (\Exception $ex) {
+                // ignore
+            }
+        }
+
+        return $result;
+    }
+
+    public function doUpdate(Updater $updater)
+    {
+        // change level column in logger_message table to string & remove other logging tables if empty
+        $updater->executeMigrations(__FILE__, $this->getMigrations($updater));
+    }
+}