includes/installer/MysqlInstaller.php

   1 <?php
   2 /**
   3  * MySQL-specific installer.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup Deployment
  22  */
  23
  24 /**
  25  * Class for setting up the MediaWiki database using MySQL.
  26  *
  27  * @ingroup Deployment
  28  * @since 1.17
  29  */
  30 class MysqlInstaller extends DatabaseInstaller {
  31
  32         protected $globalNames = array(
  33                 'wgDBserver',
  34                 'wgDBname',
  35                 'wgDBuser',
  36                 'wgDBpassword',
  37                 'wgDBprefix',
  38                 'wgDBTableOptions',
  39                 'wgDBmysql5',
  40         );
  41
  42         protected $internalDefaults = array(
  43                 '_MysqlEngine' => 'InnoDB',
  44                 '_MysqlCharset' => 'binary',
  45                 '_InstallUser' => 'root',
  46         );
  47
  48         public $supportedEngines = array( 'InnoDB', 'MyISAM' );
  49
  50         public $minimumVersion = '5.0.2';
  51
  52         public $webUserPrivs = array(
  53                 'DELETE',
  54                 'INSERT',
  55                 'SELECT',
  56                 'UPDATE',
  57                 'CREATE TEMPORARY TABLES',
  58         );
  59
  60         /**
  61          * @return string
  62          */
  63         public function getName() {
  64                 return 'mysql';
  65         }
  66
  67         /**
  68          * @return bool
  69          */
  70         public function isCompiled() {
  71                 return self::checkExtension( 'mysql' ) || self::checkExtension( 'mysqli' );
  72         }
  73
  74         /**
  75          * @return string
  76          */
  77         public function getConnectForm() {
  78                 return $this->getTextBox(
  79                         'wgDBserver',
  80                         'config-db-host',
  81                         array(),
  82                         $this->parent->getHelpBox( 'config-db-host-help' )
  83                 ) .
  84                         Html::openElement( 'fieldset' ) .
  85                         Html::element( 'legend', array(), wfMessage( 'config-db-wiki-settings' )->text() ) .
  86                         $this->getTextBox( 'wgDBname', 'config-db-name', array( 'dir' => 'ltr' ),
  87                                 $this->parent->getHelpBox( 'config-db-name-help' ) ) .
  88                         $this->getTextBox( 'wgDBprefix', 'config-db-prefix', array( 'dir' => 'ltr' ),
  89                                 $this->parent->getHelpBox( 'config-db-prefix-help' ) ) .
  90                         Html::closeElement( 'fieldset' ) .
  91                         $this->getInstallUserBox();
  92         }
  93
  94         public function submitConnectForm() {
  95                 // Get variables from the request.
  96                 $newValues = $this->setVarsFromRequest( array(
  97                         'wgDBserver', 'wgDBname', 'wgDBprefix', '_InstallUser', '_InstallPassword'
  98                 ) );
  99
 100                 // Validate them.
 101                 $status = Status::newGood();
 102                 if ( !strlen( $newValues['wgDBserver'] ) ) {
 103                         $status->fatal( 'config-missing-db-host' );
 104                 }
 105                 if ( !strlen( $newValues['wgDBname'] ) ) {
 106                         $status->fatal( 'config-missing-db-name' );
 107                 } elseif ( !preg_match( '/^[a-z0-9+_-]+$/i', $newValues['wgDBname'] ) ) {
 108                         $status->fatal( 'config-invalid-db-name', $newValues['wgDBname'] );
 109                 }
 110                 if ( !preg_match( '/^[a-z0-9_-]*$/i', $newValues['wgDBprefix'] ) ) {
 111                         $status->fatal( 'config-invalid-db-prefix', $newValues['wgDBprefix'] );
 112                 }
 113                 if ( !strlen( $newValues['_InstallUser'] ) ) {
 114                         $status->fatal( 'config-db-username-empty' );
 115                 }
 116                 if ( !strlen( $newValues['_InstallPassword'] ) ) {
 117                         $status->fatal( 'config-db-password-empty', $newValues['_InstallUser'] );
 118                 }
 119                 if ( !$status->isOK() ) {
 120                         return $status;
 121                 }
 122
 123                 // Submit user box
 124                 $status = $this->submitInstallUserBox();
 125                 if ( !$status->isOK() ) {
 126                         return $status;
 127                 }
 128
 129                 // Try to connect
 130                 $status = $this->getConnection();
 131                 if ( !$status->isOK() ) {
 132                         return $status;
 133                 }
 134                 /**
 135                  * @var $conn DatabaseBase
 136                  */
 137                 $conn = $status->value;
 138
 139                 // Check version
 140                 $version = $conn->getServerVersion();
 141                 if ( version_compare( $version, $this->minimumVersion ) < 0 ) {
 142                         return Status::newFatal( 'config-mysql-old', $this->minimumVersion, $version );
 143                 }
 144
 145                 return $status;
 146         }
 147
 148         /**
 149          * @return Status
 150          */
 151         public function openConnection() {
 152                 $status = Status::newGood();
 153                 try {
 154                         $db = DatabaseBase::factory( 'mysql', array(
 155                                 'host' => $this->getVar( 'wgDBserver' ),
 156                                 'user' => $this->getVar( '_InstallUser' ),
 157                                 'password' => $this->getVar( '_InstallPassword' ),
 158                                 'dbname' => false,
 159                                 'flags' => 0,
 160                                 'tablePrefix' => $this->getVar( 'wgDBprefix' ) ) );
 161                         $status->value = $db;
 162                 } catch ( DBConnectionError $e ) {
 163                         $status->fatal( 'config-connection-error', $e->getMessage() );
 164                 }
 165
 166                 return $status;
 167         }
 168
 169         public function preUpgrade() {
 170                 global $wgDBuser, $wgDBpassword;
 171
 172                 $status = $this->getConnection();
 173                 if ( !$status->isOK() ) {
 174                         $this->parent->showStatusError( $status );
 175
 176                         return;
 177                 }
 178                 /**
 179                  * @var $conn DatabaseBase
 180                  */
 181                 $conn = $status->value;
 182                 $conn->selectDB( $this->getVar( 'wgDBname' ) );
 183
 184                 # Determine existing default character set
 185                 if ( $conn->tableExists( "revision", __METHOD__ ) ) {
 186                         $revision = $conn->buildLike( $this->getVar( 'wgDBprefix' ) . 'revision' );
 187                         $res = $conn->query( "SHOW TABLE STATUS $revision", __METHOD__ );
 188                         $row = $conn->fetchObject( $res );
 189                         if ( !$row ) {
 190                                 $this->parent->showMessage( 'config-show-table-status' );
 191                                 $existingSchema = false;
 192                                 $existingEngine = false;
 193                         } else {
 194                                 if ( preg_match( '/^latin1/', $row->Collation ) ) {
 195                                         $existingSchema = 'latin1';
 196                                 } elseif ( preg_match( '/^utf8/', $row->Collation ) ) {
 197                                         $existingSchema = 'utf8';
 198                                 } elseif ( preg_match( '/^binary/', $row->Collation ) ) {
 199                                         $existingSchema = 'binary';
 200                                 } else {
 201                                         $existingSchema = false;
 202                                         $this->parent->showMessage( 'config-unknown-collation' );
 203                                 }
 204                                 if ( isset( $row->Engine ) ) {
 205                                         $existingEngine = $row->Engine;
 206                                 } else {
 207                                         $existingEngine = $row->Type;
 208                                 }
 209                         }
 210                 } else {
 211                         $existingSchema = false;
 212                         $existingEngine = false;
 213                 }
 214
 215                 if ( $existingSchema && $existingSchema != $this->getVar( '_MysqlCharset' ) ) {
 216                         $this->setVar( '_MysqlCharset', $existingSchema );
 217                 }
 218                 if ( $existingEngine && $existingEngine != $this->getVar( '_MysqlEngine' ) ) {
 219                         $this->setVar( '_MysqlEngine', $existingEngine );
 220                 }
 221
 222                 # Normal user and password are selected after this step, so for now
 223                 # just copy these two
 224                 $wgDBuser = $this->getVar( '_InstallUser' );
 225                 $wgDBpassword = $this->getVar( '_InstallPassword' );
 226         }
 227
 228         /**
 229          * Get a list of storage engines that are available and supported
 230          *
 231          * @return array
 232          */
 233         public function getEngines() {
 234                 $status = $this->getConnection();
 235
 236                 /**
 237                  * @var $conn DatabaseBase
 238                  */
 239                 $conn = $status->value;
 240
 241                 $engines = array();
 242                 $res = $conn->query( 'SHOW ENGINES', __METHOD__ );
 243                 foreach ( $res as $row ) {
 244                         if ( $row->Support == 'YES' || $row->Support == 'DEFAULT' ) {
 245                                 $engines[] = $row->Engine;
 246                         }
 247                 }
 248                 $engines = array_intersect( $this->supportedEngines, $engines );
 249
 250                 return $engines;
 251         }
 252
 253         /**
 254          * Get a list of character sets that are available and supported
 255          *
 256          * @return array
 257          */
 258         public function getCharsets() {
 259                 return array( 'binary', 'utf8' );
 260         }
 261
 262         /**
 263          * Return true if the install user can create accounts
 264          *
 265          * @return bool
 266          */
 267         public function canCreateAccounts() {
 268                 $status = $this->getConnection();
 269                 if ( !$status->isOK() ) {
 270                         return false;
 271                 }
 272                 /** @var $conn DatabaseBase */
 273                 $conn = $status->value;
 274
 275                 // Get current account name
 276                 $currentName = $conn->selectField( '', 'CURRENT_USER()', '', __METHOD__ );
 277                 $parts = explode( '@', $currentName );
 278                 if ( count( $parts ) != 2 ) {
 279                         return false;
 280                 }
 281                 $quotedUser = $conn->addQuotes( $parts[0] ) .
 282                         '@' . $conn->addQuotes( $parts[1] );
 283
 284                 // The user needs to have INSERT on mysql.* to be able to CREATE USER
 285                 // The grantee will be double-quoted in this query, as required
 286                 $res = $conn->select( 'INFORMATION_SCHEMA.USER_PRIVILEGES', '*',
 287                         array( 'GRANTEE' => $quotedUser ), __METHOD__ );
 288                 $insertMysql = false;
 289                 $grantOptions = array_flip( $this->webUserPrivs );
 290                 foreach ( $res as $row ) {
 291                         if ( $row->PRIVILEGE_TYPE == 'INSERT' ) {
 292                                 $insertMysql = true;
 293                         }
 294                         if ( $row->IS_GRANTABLE ) {
 295                                 unset( $grantOptions[$row->PRIVILEGE_TYPE] );
 296                         }
 297                 }
 298
 299                 // Check for DB-specific privs for mysql.*
 300                 if ( !$insertMysql ) {
 301                         $row = $conn->selectRow( 'INFORMATION_SCHEMA.SCHEMA_PRIVILEGES', '*',
 302                                 array(
 303                                         'GRANTEE' => $quotedUser,
 304                                         'TABLE_SCHEMA' => 'mysql',
 305                                         'PRIVILEGE_TYPE' => 'INSERT',
 306                                 ), __METHOD__ );
 307                         if ( $row ) {
 308                                 $insertMysql = true;
 309                         }
 310                 }
 311
 312                 if ( !$insertMysql ) {
 313                         return false;
 314                 }
 315
 316                 // Check for DB-level grant options
 317                 $res = $conn->select( 'INFORMATION_SCHEMA.SCHEMA_PRIVILEGES', '*',
 318                         array(
 319                                 'GRANTEE' => $quotedUser,
 320                                 'IS_GRANTABLE' => 1,
 321                         ), __METHOD__ );
 322                 foreach ( $res as $row ) {
 323                         $regex = $conn->likeToRegex( $row->TABLE_SCHEMA );
 324                         if ( preg_match( $regex, $this->getVar( 'wgDBname' ) ) ) {
 325                                 unset( $grantOptions[$row->PRIVILEGE_TYPE] );
 326                         }
 327                 }
 328                 if ( count( $grantOptions ) ) {
 329                         // Can't grant everything
 330                         return false;
 331                 }
 332
 333                 return true;
 334         }
 335
 336         /**
 337          * @return string
 338          */
 339         public function getSettingsForm() {
 340                 if ( $this->canCreateAccounts() ) {
 341                         $noCreateMsg = false;
 342                 } else {
 343                         $noCreateMsg = 'config-db-web-no-create-privs';
 344                 }
 345                 $s = $this->getWebUserBox( $noCreateMsg );
 346
 347                 // Do engine selector
 348                 $engines = $this->getEngines();
 349                 // If the current default engine is not supported, use an engine that is
 350                 if ( !in_array( $this->getVar( '_MysqlEngine' ), $engines ) ) {
 351                         $this->setVar( '_MysqlEngine', reset( $engines ) );
 352                 }
 353
 354                 $s .= Xml::openElement( 'div', array(
 355                         'id' => 'dbMyisamWarning'
 356                 ) );
 357                 $myisamWarning = 'config-mysql-myisam-dep';
 358                 if ( count( $engines ) === 1 ) {
 359                         $myisamWarning = 'config-mysql-only-myisam-dep';
 360                 }
 361                 $s .= $this->parent->getWarningBox( wfMessage( $myisamWarning )->text() );
 362                 $s .= Xml::closeElement( 'div' );
 363
 364                 if ( $this->getVar( '_MysqlEngine' ) != 'MyISAM' ) {
 365                         $s .= Xml::openElement( 'script', array( 'type' => 'text/javascript' ) );
 366                         $s .= '$(\'#dbMyisamWarning\').hide();';
 367                         $s .= Xml::closeElement( 'script' );
 368                 }
 369
 370                 if ( count( $engines ) >= 2 ) {
 371                         // getRadioSet() builds a set of labeled radio buttons.
 372                         // For grep: The following messages are used as the item labels:
 373                         // config-mysql-innodb, config-mysql-myisam
 374                         $s .= $this->getRadioSet( array(
 375                                 'var' => '_MysqlEngine',
 376                                 'label' => 'config-mysql-engine',
 377                                 'itemLabelPrefix' => 'config-mysql-',
 378                                 'values' => $engines,
 379                                 'itemAttribs' => array(
 380                                         'MyISAM' => array(
 381                                                 'class' => 'showHideRadio',
 382                                                 'rel' => 'dbMyisamWarning'
 383                                         ),
 384                                         'InnoDB' => array(
 385                                                 'class' => 'hideShowRadio',
 386                                                 'rel' => 'dbMyisamWarning'
 387                                         )
 388                                 )
 389                         ) );
 390                         $s .= $this->parent->getHelpBox( 'config-mysql-engine-help' );
 391                 }
 392
 393                 // If the current default charset is not supported, use a charset that is
 394                 $charsets = $this->getCharsets();
 395                 if ( !in_array( $this->getVar( '_MysqlCharset' ), $charsets ) ) {
 396                         $this->setVar( '_MysqlCharset', reset( $charsets ) );
 397                 }
 398
 399                 // Do charset selector
 400                 if ( count( $charsets ) >= 2 ) {
 401                         // getRadioSet() builds a set of labeled radio buttons.
 402                         // For grep: The following messages are used as the item labels:
 403                         // config-mysql-binary, config-mysql-utf8
 404                         $s .= $this->getRadioSet( array(
 405                                 'var' => '_MysqlCharset',
 406                                 'label' => 'config-mysql-charset',
 407                                 'itemLabelPrefix' => 'config-mysql-',
 408                                 'values' => $charsets
 409                         ) );
 410                         $s .= $this->parent->getHelpBox( 'config-mysql-charset-help' );
 411                 }
 412
 413                 return $s;
 414         }
 415
 416         /**
 417          * @return Status
 418          */
 419         public function submitSettingsForm() {
 420                 $this->setVarsFromRequest( array( '_MysqlEngine', '_MysqlCharset' ) );
 421                 $status = $this->submitWebUserBox();
 422                 if ( !$status->isOK() ) {
 423                         return $status;
 424                 }
 425
 426                 // Validate the create checkbox
 427                 $canCreate = $this->canCreateAccounts();
 428                 if ( !$canCreate ) {
 429                         $this->setVar( '_CreateDBAccount', false );
 430                         $create = false;
 431                 } else {
 432                         $create = $this->getVar( '_CreateDBAccount' );
 433                 }
 434
 435                 if ( !$create ) {
 436                         // Test the web account
 437                         try {
 438                                 DatabaseBase::factory( 'mysql', array(
 439                                         'host' => $this->getVar( 'wgDBserver' ),
 440                                         'user' => $this->getVar( 'wgDBuser' ),
 441                                         'password' => $this->getVar( 'wgDBpassword' ),
 442                                         'dbname' => false,
 443                                         'flags' => 0,
 444                                         'tablePrefix' => $this->getVar( 'wgDBprefix' )
 445                                 ) );
 446                         } catch ( DBConnectionError $e ) {
 447                                 return Status::newFatal( 'config-connection-error', $e->getMessage() );
 448                         }
 449                 }
 450
 451                 // Validate engines and charsets
 452                 // This is done pre-submit already so it's just for security
 453                 $engines = $this->getEngines();
 454                 if ( !in_array( $this->getVar( '_MysqlEngine' ), $engines ) ) {
 455                         $this->setVar( '_MysqlEngine', reset( $engines ) );
 456                 }
 457                 $charsets = $this->getCharsets();
 458                 if ( !in_array( $this->getVar( '_MysqlCharset' ), $charsets ) ) {
 459                         $this->setVar( '_MysqlCharset', reset( $charsets ) );
 460                 }
 461
 462                 return Status::newGood();
 463         }
 464
 465         public function preInstall() {
 466                 # Add our user callback to installSteps, right before the tables are created.
 467                 $callback = array(
 468                         'name' => 'user',
 469                         'callback' => array( $this, 'setupUser' ),
 470                 );
 471                 $this->parent->addInstallStep( $callback, 'tables' );
 472         }
 473
 474         /**
 475          * @return Status
 476          */
 477         public function setupDatabase() {
 478                 $status = $this->getConnection();
 479                 if ( !$status->isOK() ) {
 480                         return $status;
 481                 }
 482                 /** @var DatabaseBase $conn */
 483                 $conn = $status->value;
 484                 $dbName = $this->getVar( 'wgDBname' );
 485                 if ( !$conn->selectDB( $dbName ) ) {
 486                         $conn->query(
 487                                 "CREATE DATABASE " . $conn->addIdentifierQuotes( $dbName ) . "CHARACTER SET utf8",
 488                                 __METHOD__
 489                         );
 490                         $conn->selectDB( $dbName );
 491                 }
 492                 $this->setupSchemaVars();
 493
 494                 return $status;
 495         }
 496
 497         /**
 498          * @return Status
 499          */
 500         public function setupUser() {
 501                 $dbUser = $this->getVar( 'wgDBuser' );
 502                 if ( $dbUser == $this->getVar( '_InstallUser' ) ) {
 503                         return Status::newGood();
 504                 }
 505                 $status = $this->getConnection();
 506                 if ( !$status->isOK() ) {
 507                         return $status;
 508                 }
 509
 510                 $this->setupSchemaVars();
 511                 $dbName = $this->getVar( 'wgDBname' );
 512                 $this->db->selectDB( $dbName );
 513                 $server = $this->getVar( 'wgDBserver' );
 514                 $password = $this->getVar( 'wgDBpassword' );
 515                 $grantableNames = array();
 516
 517                 if ( $this->getVar( '_CreateDBAccount' ) ) {
 518                         // Before we blindly try to create a user that already has access,
 519                         try { // first attempt to connect to the database
 520                                 DatabaseBase::factory( 'mysql', array(
 521                                         'host' => $server,
 522                                         'user' => $dbUser,
 523                                         'password' => $password,
 524                                         'dbname' => false,
 525                                         'flags' => 0,
 526                                         'tablePrefix' => $this->getVar( 'wgDBprefix' )
 527                                 ) );
 528                                 $grantableNames[] = $this->buildFullUserName( $dbUser, $server );
 529                                 $tryToCreate = false;
 530                         } catch ( DBConnectionError $e ) {
 531                                 $tryToCreate = true;
 532                         }
 533                 } else {
 534                         $grantableNames[] = $this->buildFullUserName( $dbUser, $server );
 535                         $tryToCreate = false;
 536                 }
 537
 538                 if ( $tryToCreate ) {
 539                         $createHostList = array(
 540                                 $server,
 541                                 'localhost',
 542                                 'localhost.localdomain',
 543                                 '%'
 544                         );
 545
 546                         $createHostList = array_unique( $createHostList );
 547                         $escPass = $this->db->addQuotes( $password );
 548
 549                         foreach ( $createHostList as $host ) {
 550                                 $fullName = $this->buildFullUserName( $dbUser, $host );
 551                                 if ( !$this->userDefinitelyExists( $dbUser, $host ) ) {
 552                                         try {
 553                                                 $this->db->begin( __METHOD__ );
 554                                                 $this->db->query( "CREATE USER $fullName IDENTIFIED BY $escPass", __METHOD__ );
 555                                                 $this->db->commit( __METHOD__ );
 556                                                 $grantableNames[] = $fullName;
 557                                         } catch ( DBQueryError $dqe ) {
 558                                                 if ( $this->db->lastErrno() == 1396 /* ER_CANNOT_USER */ ) {
 559                                                         // User (probably) already exists
 560                                                         $this->db->rollback( __METHOD__ );
 561                                                         $status->warning( 'config-install-user-alreadyexists', $dbUser );
 562                                                         $grantableNames[] = $fullName;
 563                                                         break;
 564                                                 } else {
 565                                                         // If we couldn't create for some bizzare reason and the
 566                                                         // user probably doesn't exist, skip the grant
 567                                                         $this->db->rollback( __METHOD__ );
 568                                                         $status->warning( 'config-install-user-create-failed', $dbUser, $dqe->getText() );
 569                                                 }
 570                                         }
 571                                 } else {
 572                                         $status->warning( 'config-install-user-alreadyexists', $dbUser );
 573                                         $grantableNames[] = $fullName;
 574                                         break;
 575                                 }
 576                         }
 577                 }
 578
 579                 // Try to grant to all the users we know exist or we were able to create
 580                 $dbAllTables = $this->db->addIdentifierQuotes( $dbName ) . '.*';
 581                 foreach ( $grantableNames as $name ) {
 582                         try {
 583                                 $this->db->begin( __METHOD__ );
 584                                 $this->db->query( "GRANT ALL PRIVILEGES ON $dbAllTables TO $name", __METHOD__ );
 585                                 $this->db->commit( __METHOD__ );
 586                         } catch ( DBQueryError $dqe ) {
 587                                 $this->db->rollback( __METHOD__ );
 588                                 $status->fatal( 'config-install-user-grant-failed', $dbUser, $dqe->getText() );
 589                         }
 590                 }
 591
 592                 return $status;
 593         }
 594
 595         /**
 596          * Return a formal 'User'@'Host' username for use in queries
 597          * @param string $name Username, quotes will be added
 598          * @param string $host Hostname, quotes will be added
 599          * @return string
 600          */
 601         private function buildFullUserName( $name, $host ) {
 602                 return $this->db->addQuotes( $name ) . '@' . $this->db->addQuotes( $host );
 603         }
 604
 605         /**
 606          * Try to see if the user account exists. Our "superuser" may not have
 607          * access to mysql.user, so false means "no" or "maybe"
 608          * @param string $host Hostname to check
 609          * @param string $user Username to check
 610          * @return bool
 611          */
 612         private function userDefinitelyExists( $host, $user ) {
 613                 try {
 614                         $res = $this->db->selectRow( 'mysql.user', array( 'Host', 'User' ),
 615                                 array( 'Host' => $host, 'User' => $user ), __METHOD__ );
 616
 617                         return (bool)$res;
 618                 } catch ( DBQueryError $dqe ) {
 619                         return false;
 620                 }
 621         }
 622
 623         /**
 624          * Return any table options to be applied to all tables that don't
 625          * override them.
 626          *
 627          * @return string
 628          */
 629         protected function getTableOptions() {
 630                 $options = array();
 631                 if ( $this->getVar( '_MysqlEngine' ) !== null ) {
 632                         $options[] = "ENGINE=" . $this->getVar( '_MysqlEngine' );
 633                 }
 634                 if ( $this->getVar( '_MysqlCharset' ) !== null ) {
 635                         $options[] = 'DEFAULT CHARSET=' . $this->getVar( '_MysqlCharset' );
 636                 }
 637
 638                 return implode( ', ', $options );
 639         }
 640
 641         /**
 642          * Get variables to substitute into tables.sql and the SQL patch files.
 643          *
 644          * @return array
 645          */
 646         public function getSchemaVars() {
 647                 return array(
 648                         'wgDBTableOptions' => $this->getTableOptions(),
 649                         'wgDBname' => $this->getVar( 'wgDBname' ),
 650                         'wgDBuser' => $this->getVar( 'wgDBuser' ),
 651                         'wgDBpassword' => $this->getVar( 'wgDBpassword' ),
 652                 );
 653         }
 654
 655         public function getLocalSettings() {
 656                 $dbmysql5 = wfBoolToStr( $this->getVar( 'wgDBmysql5', true ) );
 657                 $prefix = LocalSettingsGenerator::escapePhpString( $this->getVar( 'wgDBprefix' ) );
 658                 $tblOpts = LocalSettingsGenerator::escapePhpString( $this->getTableOptions() );
 659
 660                 return "# MySQL specific settings
 661 \$wgDBprefix = \"{$prefix}\";
 662
 663 # MySQL table options to use during installation or update
 664 \$wgDBTableOptions = \"{$tblOpts}\";
 665
 666 # Experimental charset support for MySQL 5.0.
 667 \$wgDBmysql5 = {$dbmysql5};";
 668         }
 669 }