MDL-58931 dml: add support for aurora mysql

Author: mackensen

admin/cli/install.php

@@ -215,6 +215,7 @@
 
 //Database types
 $databases = array('mysqli' => moodle_database::get_driver_instance('mysqli', 'native'),
+                   'auroramysql' => moodle_database::get_driver_instance('auroramysql', 'native'),
                    'mariadb'=> moodle_database::get_driver_instance('mariadb', 'native'),
                    'pgsql'  => moodle_database::get_driver_instance('pgsql',  'native'),
                    'oci'    => moodle_database::get_driver_instance('oci',    'native'),

install.php

@@ -493,6 +493,7 @@
                                   get_string('databasetypesub', 'install'));
 
     $databases = array('mysqli' => moodle_database::get_driver_instance('mysqli', 'native'),
+                       'auroramysql' => moodle_database::get_driver_instance('auroramysql', 'native'),
                        'mariadb'=> moodle_database::get_driver_instance('mariadb', 'native'),
                        'pgsql'  => moodle_database::get_driver_instance('pgsql',  'native'),
                        'oci'    => moodle_database::get_driver_instance('oci',    'native'),

lang/en/install.php

@@ -169,6 +169,12 @@
     (you will see errors when you look at pages) so you\'ll have to remove the .htaccess file.</p></li>
 </ol>';
 $string['mysqliextensionisnotpresentinphp'] = 'PHP has not been properly configured with the MySQLi extension for it to communicate with MySQL. Please check your php.ini file or recompile PHP.';
+$string['nativeauroramysql'] = 'Aurora MySQL (native/auroramysql)';
+$string['nativeauroramysqlhelp'] = '<p>The database is where most of the Moodle settings and data are stored and must be configured here.</p>
+<p>The database name, username, and password are required fields; table prefix is optional.</p>
+<p>The database name may contain only alphanumeric characters, dollar ($) and underscore (_).</p>
+<p>If the database currently does not exist, and the user you specify has permission, Moodle will attempt to create a new database with the correct permissions and settings.</p>
+<p>This driver is not compatible with legacy MyISAM engine.</p>';
 $string['nativemariadb'] = 'MariaDB (native/mariadb)';
 $string['nativemariadbhelp'] = '<p>The database is where most of the Moodle settings and data are stored and must be configured here.</p>
 <p>The database name, username, and password are required fields; table prefix is optional.</p>

lib/dml/auroramysql_native_moodle_database.php

@@ -0,0 +1,99 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * Native Aurora MySQL class representing moodle database interface.
+ *
+ * @package    core_dml
+ * @copyright  2020 Lafayette College ITS
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+defined('MOODLE_INTERNAL') || die();
+
+require_once(__DIR__.'/moodle_database.php');
+require_once(__DIR__.'/mysqli_native_moodle_database.php');
+require_once(__DIR__.'/mysqli_native_moodle_recordset.php');
+require_once(__DIR__.'/mysqli_native_moodle_temptables.php');
+
+/**
+ * Native Aurora MySQL class representing moodle database interface.
+ *
+ * @package    core_dml
+ * @copyright  2020 Lafayette College ITS
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class auroramysql_native_moodle_database extends mysqli_native_moodle_database {
+
+    /** @var bool is compressed row format supported cache */
+    protected $compressedrowformatsupported = false;
+
+    /**
+     * Returns localised database type name.
+     *
+     * Returns localised database type name. Can be used before connect().
+     * @return string
+     */
+    public function get_name(): ?string {
+        return get_string('nativeauroramysql', 'install');
+    }
+
+    /**
+     * Returns localised database configuration help.
+     *
+     * Returns localised database configuration help. Can be used before connect().
+     * @return string
+     */
+    public function get_configuration_help(): ?string {
+        return get_string('nativeauroramysql', 'install');
+    }
+
+    /**
+     * Returns the database vendor.
+     *
+     * Returns the database vendor. Can be used before connect().
+     * @return string The db vendor name, usually the same as db family name.
+     */
+    public function get_dbvendor(): ?string {
+        return 'mysql';
+    }
+
+    /**
+     * Returns more specific database driver type
+     *
+     * Returns more specific database driver type. Can be used before connect().
+     * @return string db type mysqli, pgsql, oci, mssql, sqlsrv
+     */
+    protected function get_dbtype(): ?string {
+        return 'auroramysql';
+    }
+
+    /**
+     * It is time to require transactions everywhere.
+     *
+     * MyISAM is NOT supported!
+     *
+     * @return bool
+     */
+    protected function transactions_supported(): ?bool {
+        if ($this->external) {
+            return parent::transactions_supported();
+        }
+        return true;
+    }
+
+
+}