Allow to distinguish between MySQL and MariaDB (also in installation)

core/Db/Schema.php

@@ -208,4 +208,16 @@ public function hasTables()
     {
         return $this->getSchema()->hasTables();
     }
+
+    /**
+     * Adds a MAX_EXECUTION_TIME hint into a SELECT query if $limit is bigger than 1
+     *
+     * @param string $sql  query to add hint to
+     * @param int $limit  time limit in seconds
+     * @return string
+     */
+    public function addMaxExecutionTimeHintToQuery($sql, $limit)
+    {
+        return $this->getSchema()->addMaxExecutionTimeHintToQuery($sql, $limit);
+    }
 }

core/Db/Schema/Mariadb.php

@@ -0,0 +1,38 @@
+<?php
+/**
+ * Matomo - free/libre analytics platform
+ *
+ * @link https://matomo.org
+ * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
+ *
+ */
+namespace Piwik\Db\Schema;
+
+/**
+ * Mariadb schema
+ */
+class Mariadb extends Mysql
+{
+    /**
+     * Adds a max_statement_time hint into a SELECT query if $limit is bigger than 1
+     *
+     * @param string $sql  query to add hint to
+     * @param int $limit  time limit in seconds
+     * @return string
+     */
+    public static function addMaxExecutionTimeHintToQuery($sql, $limit)
+    {
+        if ($limit <= 0) {
+            return $sql;
+        }
+
+        $sql = trim($sql);
+        $pos = stripos($sql, 'SELECT');
+        if ($pos !== false) {
+            $maxExecutionTimeHint = 'SET STATEMENT max_statement_time='.$limit.' FOR ';
+            $sql = substr_replace($sql, $maxExecutionTimeHint . 'SELECT', $pos, strlen('SELECT'));
+        }
+
+        return $sql;
+    }
+}

core/Db/Schema/Mysql.php

@@ -638,6 +638,32 @@ public function truncateAllTables()
         }
     }
 
+    /**
+     * Adds a MAX_EXECUTION_TIME hint into a SELECT query if $limit is bigger than 1
+     *
+     * @param string $sql  query to add hint to
+     * @param int $limit  time limit in seconds
+     * @return string
+     */
+    public static function addMaxExecutionTimeHintToQuery($sql, $limit)
+    {
+        if ($limit <= 0) {
+            return $sql;
+        }
+
+        $sql = trim($sql);
+        $pos = stripos($sql, 'SELECT');
+        if ($pos !== false) {
+            $timeInMs = $limit * 1000;
+            $timeInMs = (int) $timeInMs;
+            $maxExecutionTimeHint = ' /*+ MAX_EXECUTION_TIME('.$timeInMs.') */ ';
+
+            $sql = substr_replace($sql, 'SELECT ' . $maxExecutionTimeHint, $pos, strlen('SELECT'));
+        }
+
+        return $sql;
+    }
+
     private function getTablePrefix()
     {
         return $this->getDbSettings()->getTablePrefix();

core/Db/SchemaInterface.php

@@ -105,4 +105,13 @@ public function getTableColumns($tableName);
      * @return bool  True if tables exist; false otherwise
      */
     public function hasTables();
+
+    /**
+     * Adds a MAX_EXECUTION_TIME hint into a SELECT query if $limit is bigger than 1
+     *
+     * @param string $sql  query to add hint to
+     * @param int $limit  time limit in seconds
+     * @return string
+     */
+    public static function addMaxExecutionTimeHintToQuery($sql, $limit);
 }

core/DbHelper.php

@@ -294,22 +294,7 @@ public static function deleteArchiveTables()
      */
     public static function addMaxExecutionTimeHintToQuery($sql, $limit)
     {
-        if ($limit <= 0) {
-            return $sql;
-        }
-
-        $sql = trim($sql);
-        $pos = stripos($sql, 'SELECT');
-        if ($pos !== false) {
-
-            $timeInMs = $limit * 1000;
-            $timeInMs = (int) $timeInMs;
-            $maxExecutionTimeHint = ' /*+ MAX_EXECUTION_TIME('.$timeInMs.') */ ';
-
-            $sql = substr_replace($sql, 'SELECT ' . $maxExecutionTimeHint, $pos, strlen('SELECT'));
-        }
-
-        return $sql;
+        return Schema::getInstance()->addMaxExecutionTimeHintToQuery($sql, $limit);
     }
 
     /**

plugins/Diagnostics/Diagnostic/DatabaseAbilitiesCheck.php

@@ -47,6 +47,13 @@ public function execute()
         $result->addItem($this->checkTemporaryTables());
         $result->addItem($this->checkTransactionLevel());
 
+        $databaseVersion = Db::fetchOne('SELECT VERSION();');
+
+        if (strpos(strtolower($databaseVersion), 'mariadb')) {
+            $comment = $this->translator->translate('Diagnostics_MariaDbNotConfigured');
+            $result->addItem(new DiagnosticResultItem(DiagnosticResult::STATUS_WARNING, $comment));
+        }
+
         return [$result];
     }
 

plugins/Diagnostics/lang/en.json

@@ -5,6 +5,7 @@
         "MysqlTransactionLevel": "Changing transaction isolation level not supported. Archiving will still work but it may be slower and it is recommended to change for example the `binlog_format` to `row` if possible.",
         "MysqlMaxPacketSize": "Max Packet Size",
         "MysqlMaxPacketSizeWarning": "It is recommended to configure a 'max_allowed_packet' size in your MySQL database of at least %1$s. Configured is currently %2$s.",
+        "MariaDbNotConfigured": "It seems you are using a MariaDb server. To ensure all database features can be used, please ensure to set <code>[database] schema = Mariadb</code> in the \"config/config.ini.php\" file.",
         "ConfigFileIntroduction": "Here you can view the Matomo configuration. If you are running Matomo in a load balanced environment, the page might be different depending on from which server this page is loaded. Rows with a different background color are changed config values that are specified for example in the %1$s file.",
         "EnableRequiredDirectoriesDiagnostic": "This check was skipped as this check is disabled in the config. To enable this check set [General] enable_required_directories_diagnostic = 1 in the \"config/config.ini.php\" file.",
         "HideUnchanged": "If you want to see only changed values you can %1$shide all unchanged values%2$s.",

plugins/Installation/FormDatabaseSetup.php

@@ -75,6 +75,11 @@ function init()
             ->loadOptions($adapters)
             ->addRule('required', Piwik::translate('General_Required', Piwik::translate('Installation_DatabaseSetupAdapter')));
 
+        $this->addElement('select', 'schema')
+            ->setLabel(Piwik::translate('Installation_DatabaseSetupSchema'))
+            ->loadOptions(['Mysql' => 'MySQL', 'Mariadb' => 'MariaDB'])
+            ->addRule('required', Piwik::translate('General_Required', Piwik::translate('Installation_DatabaseSetupSchema')));
+
         $this->addElement('submit', 'submit', array('value' => Piwik::translate('General_Next') . ' »', 'class' => 'btn'));
 
         $defaultDatabaseType = Config::getInstance()->database['type'];
@@ -85,9 +90,10 @@ function init()
             'host'          => '127.0.0.1',
             'type'          => $defaultDatabaseType,
             'tables_prefix' => 'matomo_',
+            'schema' => 'Mysql',
         );
 
-        $defaultsEnvironment = array('host', 'adapter', 'tables_prefix', 'username', 'password', 'dbname');
+        $defaultsEnvironment = array('host', 'adapter', 'tables_prefix', 'username', 'schema', 'password', 'dbname');
         foreach ($defaultsEnvironment as $name) {
             $envName = 'DATABASE_' . strtoupper($name); // fyi getenv is case insensitive
             $envNameMatomo = 'MATOMO_' . $envName;
@@ -130,7 +136,7 @@ public function createDatabaseObject()
             'tables_prefix' => (is_null($tables_prefix)) ? $tables_prefix : trim($tables_prefix),
             'adapter'       => $adapter,
             'port'          => $port,
-            'schema'        => Config::getInstance()->database['schema'],
+            'schema'        => $this->getSubmitValue('schema'),
             'type'          => $this->getSubmitValue('type'),
             'enable_ssl'    => false
         );

plugins/Installation/lang/en.json

@@ -14,6 +14,7 @@
         "DatabaseSetupDatabaseName": "Database Name",
         "DatabaseSetupLogin": "Login",
         "DatabaseSetupServer": "Database Server",
+        "DatabaseSetupSchema": "Database Schema",
         "DatabaseSetupTablePrefix": "Table Prefix",
         "Email": "Email",
         "Extension": "extension",