includes/db/DatabaseOracle.php

   1 <?php
   2 /**
   3  * This is the Oracle database abstraction layer.
   4  *
   5  * @file
   6  * @ingroup Database
   7  */
   8
   9 /**
  10  * @ingroup Database
  11  */
  12 class ORABlob {
  13         var $mData;
  14
  15         function __construct( $data ) {
  16                 $this->mData = $data;
  17         }
  18
  19         function getData() {
  20                 return $this->mData;
  21         }
  22 }
  23
  24 /**
  25  * The oci8 extension is fairly weak and doesn't support oci_num_rows, among
  26  * other things.  We use a wrapper class to handle that and other
  27  * Oracle-specific bits, like converting column names back to lowercase.
  28  * @ingroup Database
  29  */
  30 class ORAResult {
  31         private $rows;
  32         private $cursor;
  33         private $nrows;
  34
  35         private $columns = array();
  36
  37         private function array_unique_md( $array_in ) {
  38                 $array_out = array();
  39                 $array_hashes = array();
  40
  41                 foreach ( $array_in as $item ) {
  42                         $hash = md5( serialize( $item ) );
  43                         if ( !isset( $array_hashes[$hash] ) ) {
  44                                 $array_hashes[$hash] = $hash;
  45                                 $array_out[] = $item;
  46                         }
  47                 }
  48
  49                 return $array_out;
  50         }
  51
  52         function __construct( &$db, $stmt, $unique = false ) {
  53                 $this->db =& $db;
  54
  55                 if ( ( $this->nrows = oci_fetch_all( $stmt, $this->rows, 0, - 1, OCI_FETCHSTATEMENT_BY_ROW | OCI_NUM ) ) === false ) {
  56                         $e = oci_error( $stmt );
  57                         $db->reportQueryError( $e['message'], $e['code'], '', __METHOD__ );
  58                         $this->free();
  59                         return;
  60                 }
  61
  62                 if ( $unique ) {
  63                         $this->rows = $this->array_unique_md( $this->rows );
  64                         $this->nrows = count( $this->rows );
  65                 }
  66
  67                 if ($this->nrows > 0) {
  68                         foreach ( $this->rows[0] as $k => $v ) {
  69                                 $this->columns[$k] = strtolower( oci_field_name( $stmt, $k + 1 ) );
  70                         }
  71                 }
  72
  73                 $this->cursor = 0;
  74                 oci_free_statement( $stmt );
  75         }
  76
  77         public function free() {
  78                 unset($this->db);
  79         }
  80
  81         public function seek( $row ) {
  82                 $this->cursor = min( $row, $this->nrows );
  83         }
  84
  85         public function numRows() {
  86                 return $this->nrows;
  87         }
  88
  89         public function numFields() {
  90                 return count($this->columns);
  91         }
  92
  93         public function fetchObject() {
  94                 if ( $this->cursor >= $this->nrows ) {
  95                         return false;
  96                 }
  97                 $row = $this->rows[$this->cursor++];
  98                 $ret = new stdClass();
  99                 foreach ( $row as $k => $v ) {
 100                         $lc = $this->columns[$k];
 101                         $ret->$lc = $v;
 102                 }
 103
 104                 return $ret;
 105         }
 106
 107         public function fetchRow() {
 108                 if ( $this->cursor >= $this->nrows ) {
 109                         return false;
 110                 }
 111
 112                 $row = $this->rows[$this->cursor++];
 113                 $ret = array();
 114                 foreach ( $row as $k => $v ) {
 115                         $lc = $this->columns[$k];
 116                         $ret[$lc] = $v;
 117                         $ret[$k] = $v;
 118                 }
 119                 return $ret;
 120         }
 121 }
 122
 123 /**
 124  * Utility class.
 125  * @ingroup Database
 126  */
 127 class ORAField implements Field {
 128         private $name, $tablename, $default, $max_length, $nullable,
 129                 $is_pk, $is_unique, $is_multiple, $is_key, $type;
 130
 131         function __construct( $info ) {
 132                 $this->name = $info['column_name'];
 133                 $this->tablename = $info['table_name'];
 134                 $this->default = $info['data_default'];
 135                 $this->max_length = $info['data_length'];
 136                 $this->nullable = $info['not_null'];
 137                 $this->is_pk = isset( $info['prim'] ) && $info['prim'] == 1 ? 1 : 0;
 138                 $this->is_unique = isset( $info['uniq'] ) && $info['uniq'] == 1 ? 1 : 0;
 139                 $this->is_multiple = isset( $info['nonuniq'] ) && $info['nonuniq'] == 1 ? 1 : 0;
 140                 $this->is_key = ( $this->is_pk || $this->is_unique || $this->is_multiple );
 141                 $this->type = $info['data_type'];
 142         }
 143
 144         function name() {
 145                 return $this->name;
 146         }
 147
 148         function tableName() {
 149                 return $this->tablename;
 150         }
 151
 152         function defaultValue() {
 153                 return $this->default;
 154         }
 155
 156         function maxLength() {
 157                 return $this->max_length;
 158         }
 159
 160         function isNullable() {
 161                 return $this->nullable;
 162         }
 163
 164         function isKey() {
 165                 return $this->is_key;
 166         }
 167
 168         function isMultipleKey() {
 169                 return $this->is_multiple;
 170         }
 171
 172         function type() {
 173                 return $this->type;
 174         }
 175 }
 176
 177 /**
 178  * @ingroup Database
 179  */
 180 class DatabaseOracle extends DatabaseBase {
 181         var $mInsertId = null;
 182         var $mLastResult = null;
 183         var $numeric_version = null;
 184         var $lastResult = null;
 185         var $cursor = 0;
 186         var $mAffectedRows;
 187
 188         var $ignore_DUP_VAL_ON_INDEX = false;
 189         var $sequenceData = null;
 190
 191         var $defaultCharset = 'AL32UTF8';
 192
 193         var $mFieldInfoCache = array();
 194
 195         function __construct( $server = false, $user = false, $password = false, $dbName = false,
 196                 $flags = 0, $tablePrefix = 'get from global' )
 197         {
 198                 $tablePrefix = $tablePrefix == 'get from global' ? $tablePrefix : strtoupper( $tablePrefix );
 199                 parent::__construct( $server, $user, $password, $dbName, $flags, $tablePrefix );
 200                 wfRunHooks( 'DatabaseOraclePostInit', array( &$this ) );
 201         }
 202
 203         function getType() {
 204                 return 'oracle';
 205         }
 206
 207         function cascadingDeletes() {
 208                 return true;
 209         }
 210         function cleanupTriggers() {
 211                 return true;
 212         }
 213         function strictIPs() {
 214                 return true;
 215         }
 216         function realTimestamps() {
 217                 return true;
 218         }
 219         function implicitGroupby() {
 220                 return false;
 221         }
 222         function implicitOrderby() {
 223                 return false;
 224         }
 225         function searchableIPs() {
 226                 return true;
 227         }
 228
 229         static function newFromParams( $server, $user, $password, $dbName, $flags = 0 )
 230         {
 231                 return new DatabaseOracle( $server, $user, $password, $dbName, $flags );
 232         }
 233
 234         /**
 235          * Usually aborts on failure
 236          */
 237         function open( $server, $user, $password, $dbName ) {
 238                 if ( !function_exists( 'oci_connect' ) ) {
 239                         throw new DBConnectionError( $this, "Oracle functions missing, have you compiled PHP with the --with-oci8 option?\n (Note: if you recently installed PHP, you may need to restart your webserver and database)\n" );
 240                 }
 241
 242                 $this->close();
 243                 $this->mUser = $user;
 244                 $this->mPassword = $password;
 245                 // changed internal variables functions
 246                 // mServer now holds the TNS endpoint
 247                 // mDBname is schema name if different from username
 248                 if ( !$server ) {
 249                         // backward compatibillity (server used to be null and TNS was supplied in dbname)
 250                         $this->mServer = $dbName;
 251                         $this->mDBname = $user;
 252                 } else {
 253                         $this->mServer = $server;
 254                         if ( !$dbName ) {
 255                                 $this->mDBname = $user;
 256                         } else {
 257                                 $this->mDBname = $dbName;
 258                         }
 259                 }
 260
 261                 if ( !strlen( $user ) ) { # e.g. the class is being loaded
 262                         return;
 263                 }
 264
 265                 $session_mode = $this->mFlags & DBO_SYSDBA ? OCI_SYSDBA : OCI_DEFAULT;
 266                 if ( $this->mFlags & DBO_DEFAULT ) {
 267                         $this->mConn = oci_new_connect( $this->mUser, $this->mPassword, $this->mServer, $this->defaultCharset, $session_mode );
 268                 } else {
 269                         $this->mConn = oci_connect( $this->mUser, $this->mPassword, $this->mServer, $this->defaultCharset, $session_mode );
 270                 }
 271
 272                 if ( $this->mUser != $this->mDBname ) {
 273                         //change current schema in session
 274                         $this->selectDB( $this->mDBname );
 275                 }
 276
 277                 if ( !$this->mConn ) {
 278                         throw new DBConnectionError( $this, $this->lastError() );
 279                 }
 280
 281                 $this->mOpened = true;
 282
 283                 # removed putenv calls because they interfere with the system globaly
 284                 $this->doQuery( 'ALTER SESSION SET NLS_TIMESTAMP_FORMAT=\'DD-MM-YYYY HH24:MI:SS.FF6\'' );
 285                 $this->doQuery( 'ALTER SESSION SET NLS_TIMESTAMP_TZ_FORMAT=\'DD-MM-YYYY HH24:MI:SS.FF6\'' );
 286                 return $this->mConn;
 287         }
 288
 289         /**
 290          * Closes a database connection, if it is open
 291          * Returns success, true if already closed
 292          */
 293         function close() {
 294                 $this->mOpened = false;
 295                 if ( $this->mConn ) {
 296                         return oci_close( $this->mConn );
 297                 } else {
 298                         return true;
 299                 }
 300         }
 301
 302         function execFlags() {
 303                 return $this->mTrxLevel ? OCI_DEFAULT : OCI_COMMIT_ON_SUCCESS;
 304         }
 305
 306         function doQuery( $sql ) {
 307                 wfDebug( "SQL: [$sql]\n" );
 308                 if ( !mb_check_encoding( $sql ) ) {
 309                         throw new MWException( "SQL encoding is invalid\n$sql" );
 310                 }
 311
 312                 // handle some oracle specifics
 313                 // remove AS column/table/subquery namings
 314                 if ( !defined( 'MEDIAWIKI_INSTALL' ) ) {
 315                         $sql = preg_replace( '/ as /i', ' ', $sql );
 316                 }
 317                 // Oracle has issues with UNION clause if the statement includes LOB fields
 318                 // So we do a UNION ALL and then filter the results array with array_unique
 319                 $union_unique = ( preg_match( '/\/\* UNION_UNIQUE \*\/ /', $sql ) != 0 );
 320                 // EXPLAIN syntax in Oracle is EXPLAIN PLAN FOR and it return nothing
 321                 // you have to select data from plan table after explain
 322                 $explain_id = date( 'dmYHis' );
 323
 324                 $sql = preg_replace( '/^EXPLAIN /', 'EXPLAIN PLAN SET STATEMENT_ID = \'' . $explain_id . '\' FOR', $sql, 1, $explain_count );
 325
 326                 wfSuppressWarnings();
 327
 328                 if ( ( $this->mLastResult = $stmt = oci_parse( $this->mConn, $sql ) ) === false ) {
 329                         $e = oci_error( $this->mConn );
 330                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 331                         return false;
 332                 }
 333
 334                 if ( !oci_execute( $stmt, $this->execFlags() ) ) {
 335                         $e = oci_error( $stmt );
 336                         if ( !$this->ignore_DUP_VAL_ON_INDEX || $e['code'] != '1' ) {
 337                                 $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 338                                 return false;
 339                         }
 340                 }
 341
 342                 wfRestoreWarnings();
 343
 344                 if ( $explain_count > 0 ) {
 345                         return $this->doQuery( 'SELECT id, cardinality "ROWS" FROM plan_table WHERE statement_id = \'' . $explain_id . '\'' );
 346                 } elseif ( oci_statement_type( $stmt ) == 'SELECT' ) {
 347                         return new ORAResult( $this, $stmt, $union_unique );
 348                 } else {
 349                         $this->mAffectedRows = oci_num_rows( $stmt );
 350                         return true;
 351                 }
 352         }
 353
 354         function queryIgnore( $sql, $fname = '' ) {
 355                 return $this->query( $sql, $fname, true );
 356         }
 357
 358         function freeResult( $res ) {
 359                 if ( $res instanceof ResultWrapper ) {
 360                         $res = $res->result;
 361                 }
 362
 363                 $res->free();
 364         }
 365
 366         function fetchObject( $res ) {
 367                 if ( $res instanceof ResultWrapper ) {
 368                         $res = $res->result;
 369                 }
 370
 371                 return $res->fetchObject();
 372         }
 373
 374         function fetchRow( $res ) {
 375                 if ( $res instanceof ResultWrapper ) {
 376                         $res = $res->result;
 377                 }
 378
 379                 return $res->fetchRow();
 380         }
 381
 382         function numRows( $res ) {
 383                 if ( $res instanceof ResultWrapper ) {
 384                         $res = $res->result;
 385                 }
 386
 387                 return $res->numRows();
 388         }
 389
 390         function numFields( $res ) {
 391                 if ( $res instanceof ResultWrapper ) {
 392                         $res = $res->result;
 393                 }
 394
 395                 return $res->numFields();
 396         }
 397
 398         function fieldName( $stmt, $n ) {
 399                 return oci_field_name( $stmt, $n );
 400         }
 401
 402         /**
 403          * This must be called after nextSequenceVal
 404          */
 405         function insertId() {
 406                 return $this->mInsertId;
 407         }
 408
 409         function dataSeek( $res, $row ) {
 410                 if ( $res instanceof ORAResult ) {
 411                         $res->seek( $row );
 412                 } else {
 413                         $res->result->seek( $row );
 414                 }
 415         }
 416
 417         function lastError() {
 418                 if ( $this->mConn === false ) {
 419                         $e = oci_error();
 420                 } else {
 421                         $e = oci_error( $this->mConn );
 422                 }
 423                 return $e['message'];
 424         }
 425
 426         function lastErrno() {
 427                 if ( $this->mConn === false ) {
 428                         $e = oci_error();
 429                 } else {
 430                         $e = oci_error( $this->mConn );
 431                 }
 432                 return $e['code'];
 433         }
 434
 435         function affectedRows() {
 436                 return $this->mAffectedRows;
 437         }
 438
 439         /**
 440          * Returns information about an index
 441          * If errors are explicitly ignored, returns NULL on failure
 442          */
 443         function indexInfo( $table, $index, $fname = 'DatabaseOracle::indexExists' ) {
 444                 return false;
 445         }
 446
 447         function indexUnique( $table, $index, $fname = 'DatabaseOracle::indexUnique' ) {
 448                 return false;
 449         }
 450
 451         function insert( $table, $a, $fname = 'DatabaseOracle::insert', $options = array() ) {
 452                 if ( !count( $a ) ) {
 453                         return true;
 454                 }
 455
 456                 if ( !is_array( $options ) ) {
 457                         $options = array( $options );
 458                 }
 459
 460                 if ( in_array( 'IGNORE', $options ) ) {
 461                         $this->ignore_DUP_VAL_ON_INDEX = true;
 462                 }
 463
 464                 if ( !is_array( reset( $a ) ) ) {
 465                         $a = array( $a );
 466                 }
 467
 468                 foreach ( $a as &$row ) {
 469                         $this->insertOneRow( $table, $row, $fname );
 470                 }
 471                 $retVal = true;
 472
 473                 if ( in_array( 'IGNORE', $options ) ) {
 474                         $this->ignore_DUP_VAL_ON_INDEX = false;
 475                 }
 476
 477                 return $retVal;
 478         }
 479
 480         private function fieldBindStatement ( $table, $col, &$val, $includeCol = false ) {
 481                 $col_info = $this->fieldInfoMulti( $table, $col );
 482                 $col_type = $col_info != false ? $col_info->type() : 'CONSTANT';
 483
 484                 $bind = '';
 485                 if ( is_numeric( $col ) ) {
 486                         $bind = $val;
 487                         $val = null;
 488                         return $bind;
 489                 } else if ( $includeCol ) {
 490                         $bind = "$col = ";
 491                 }
 492
 493                 if ( $val == '' && $val !== 0 && $col_type != 'BLOB' && $col_type != 'CLOB' ) {
 494                         $val = null;
 495                 }
 496
 497                 if ( $val === null ) {
 498                         if ( $col_info != false && $col_info->nullable() == 0 && $col_info->defaultValue() != null ) {
 499                                 $bind .= 'DEFAULT';
 500                         } else {
 501                                 $bind .= 'NULL';
 502                         }
 503                 } else {
 504                         $bind .= ':' . $col;
 505                 }
 506
 507                 return $bind;
 508         }
 509
 510         private function insertOneRow( $table, $row, $fname ) {
 511                 global $wgContLang;
 512
 513                 $table = $this->tableName( $table );
 514                 // "INSERT INTO tables (a, b, c)"
 515                 $sql = "INSERT INTO " . $table . " (" . join( ',', array_keys( $row ) ) . ')';
 516                 $sql .= " VALUES (";
 517
 518                 // for each value, append ":key"
 519                 $first = true;
 520                 foreach ( $row as $col => &$val ) {
 521                         if ( !$first ) {
 522                                 $sql .= ', ';
 523                         } else {
 524                                 $first = false;
 525                         }
 526
 527                         $sql .= $this->fieldBindStatement( $table, $col, $val );
 528                 }
 529                 $sql .= ')';
 530
 531                 if ( ( $this->mLastResult = $stmt = oci_parse( $this->mConn, $sql ) ) === false ) {
 532                         $e = oci_error( $this->mConn );
 533                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 534                         return false;
 535                 }
 536                 foreach ( $row as $col => &$val ) {
 537                         $col_info = $this->fieldInfoMulti( $table, $col );
 538                         $col_type = $col_info != false ? $col_info->type() : 'CONSTANT';
 539
 540                         if ( $val === null ) {
 541                                 // do nothing ... null was inserted in statement creation
 542                         } elseif ( $col_type != 'BLOB' && $col_type != 'CLOB' ) {
 543                                 if ( is_object( $val ) ) {
 544                                         $val = $val->fetch();
 545                                 }
 546
 547                                 if ( preg_match( '/^timestamp.*/i', $col_type ) == 1 && strtolower( $val ) == 'infinity' ) {
 548                                         $val = '31-12-2030 12:00:00.000000';
 549                                 }
 550
 551                                 $val = ( $wgContLang != null ) ? $wgContLang->checkTitleEncoding( $val ) : $val;
 552                                 if ( oci_bind_by_name( $stmt, ":$col", $val ) === false ) {
 553                                         $e = oci_error( $stmt );
 554                                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 555                                         return false;
 556                                 }
 557                         } else {
 558                                 if ( ( $lob[$col] = oci_new_descriptor( $this->mConn, OCI_D_LOB ) ) === false ) {
 559                                         $e = oci_error( $stmt );
 560                                         throw new DBUnexpectedError( $this, "Cannot create LOB descriptor: " . $e['message'] );
 561                                 }
 562
 563                                 if ( is_object( $val ) ) {
 564                                         $val = $val->fetch();
 565                                 }
 566
 567                                 if ( $col_type == 'BLOB' ) {
 568                                         $lob[$col]->writeTemporary( $val, OCI_TEMP_BLOB );
 569                                         oci_bind_by_name( $stmt, ":$col", $lob[$col], - 1, OCI_B_BLOB );
 570                                 } else {
 571                                         $lob[$col]->writeTemporary( $val, OCI_TEMP_CLOB );
 572                                         oci_bind_by_name( $stmt, ":$col", $lob[$col], - 1, OCI_B_CLOB );
 573                                 }
 574                         }
 575                 }
 576
 577                 wfSuppressWarnings();
 578
 579                 if ( oci_execute( $stmt, OCI_DEFAULT ) === false ) {
 580                         $e = oci_error( $stmt );
 581                         if ( !$this->ignore_DUP_VAL_ON_INDEX || $e['code'] != '1' ) {
 582                                 $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 583                                 return false;
 584                         } else {
 585                                 $this->mAffectedRows = oci_num_rows( $stmt );
 586                         }
 587                 } else {
 588                         $this->mAffectedRows = oci_num_rows( $stmt );
 589                 }
 590
 591                 wfRestoreWarnings();
 592
 593                 if ( isset( $lob ) ) {
 594                         foreach ( $lob as $lob_v ) {
 595                                 $lob_v->free();
 596                         }
 597                 }
 598
 599                 if ( !$this->mTrxLevel ) {
 600                         oci_commit( $this->mConn );
 601                 }
 602
 603                 oci_free_statement( $stmt );
 604         }
 605
 606         function insertSelect( $destTable, $srcTable, $varMap, $conds, $fname = 'DatabaseOracle::insertSelect',
 607                 $insertOptions = array(), $selectOptions = array() )
 608         {
 609                 $destTable = $this->tableName( $destTable );
 610                 if ( !is_array( $selectOptions ) ) {
 611                         $selectOptions = array( $selectOptions );
 612                 }
 613                 list( $startOpts, $useIndex, $tailOpts ) = $this->makeSelectOptions( $selectOptions );
 614                 if ( is_array( $srcTable ) ) {
 615                         $srcTable =  implode( ',', array_map( array( &$this, 'tableName' ), $srcTable ) );
 616                 } else {
 617                         $srcTable = $this->tableName( $srcTable );
 618                 }
 619
 620                 if ( ( $sequenceData = $this->getSequenceData( $destTable ) ) !== false &&
 621                                 !isset( $varMap[$sequenceData['column']] ) )
 622                 {
 623                         $varMap[$sequenceData['column']] = 'GET_SEQUENCE_VALUE(\'' . $sequenceData['sequence'] . '\')';
 624                 }
 625
 626                 // count-alias subselect fields to avoid abigious definition errors
 627                 $i = 0;
 628                 foreach ( $varMap as &$val ) {
 629                         $val = $val . ' field' . ( $i++ );
 630                 }
 631
 632                 $sql = "INSERT INTO $destTable (" . implode( ',', array_keys( $varMap ) ) . ')' .
 633                         " SELECT $startOpts " . implode( ',', $varMap ) .
 634                         " FROM $srcTable $useIndex ";
 635                 if ( $conds != '*' ) {
 636                         $sql .= ' WHERE ' . $this->makeList( $conds, LIST_AND );
 637                 }
 638                 $sql .= " $tailOpts";
 639
 640                 if ( in_array( 'IGNORE', $insertOptions ) ) {
 641                         $this->ignore_DUP_VAL_ON_INDEX = true;
 642                 }
 643
 644                 $retval = $this->query( $sql, $fname );
 645
 646                 if ( in_array( 'IGNORE', $insertOptions ) ) {
 647                         $this->ignore_DUP_VAL_ON_INDEX = false;
 648                 }
 649
 650                 return $retval;
 651         }
 652
 653         function tableName( $name ) {
 654                 global $wgSharedDB, $wgSharedPrefix, $wgSharedTables;
 655                 /*
 656                 Replace reserved words with better ones
 657                 Using uppercase because that's the only way Oracle can handle
 658                 quoted tablenames
 659                 */
 660                 switch( $name ) {
 661                         case 'user':
 662                                 $name = 'MWUSER';
 663                                 break;
 664                         case 'text':
 665                                 $name = 'PAGECONTENT';
 666                                 break;
 667                 }
 668
 669                 /*
 670                         The rest of procedure is equal to generic Databse class
 671                         except for the quoting style
 672                 */
 673                 if ( $name[0] == '"' && substr( $name, - 1, 1 ) == '"' ) {
 674                         return $name;
 675                 }
 676                 if ( preg_match( '/(^|\s)(DISTINCT|JOIN|ON|AS)(\s|$)/i', $name ) !== 0 ) {
 677                         return $name;
 678                 }
 679                 $dbDetails = array_reverse( explode( '.', $name, 2 ) );
 680                 if ( isset( $dbDetails[1] ) ) {
 681                         @list( $table, $database ) = $dbDetails;
 682                 } else {
 683                         @list( $table ) = $dbDetails;
 684                 }
 685
 686                 $prefix = $this->mTablePrefix;
 687
 688                 if ( isset( $database ) ) {
 689                         $table = ( $table[0] == '`' ? $table : "`{$table}`" );
 690                 }
 691
 692                 if ( !isset( $database ) && isset( $wgSharedDB ) && $table[0] != '"'
 693                         && isset( $wgSharedTables )
 694                         && is_array( $wgSharedTables )
 695                         && in_array( $table, $wgSharedTables )
 696                 ) {
 697                         $database = $wgSharedDB;
 698                         $prefix   = isset( $wgSharedPrefix ) ? $wgSharedPrefix : $prefix;
 699                 }
 700
 701                 if ( isset( $database ) ) {
 702                         $database = ( $database[0] == '"' ? $database : "\"{$database}\"" );
 703                 }
 704                 $table = ( $table[0] == '"') ? $table : "\"{$prefix}{$table}\"" ;
 705
 706                 $tableName = ( isset( $database ) ? "{$database}.{$table}" : "{$table}" );
 707
 708                 return strtoupper( $tableName );
 709         }
 710
 711         /**
 712          * Return the next in a sequence, save the value for retrieval via insertId()
 713          */
 714         function nextSequenceValue( $seqName ) {
 715                 $res = $this->query( "SELECT $seqName.nextval FROM dual" );
 716                 $row = $this->fetchRow( $res );
 717                 $this->mInsertId = $row[0];
 718                 return $this->mInsertId;
 719         }
 720
 721         /**
 722          * Return sequence_name if table has a sequence
 723          */
 724         private function getSequenceData( $table ) {
 725                 if ( $this->sequenceData == null ) {
 726                         $result = $this->doQuery( 'SELECT lower(us.sequence_name), lower(utc.table_name), lower(utc.column_name) from user_sequences us, user_tab_columns utc where us.sequence_name = utc.table_name||\'_\'||utc.column_name||\'_SEQ\'' );
 727
 728                         while ( ( $row = $result->fetchRow() ) !== false ) {
 729                                 $this->sequenceData[$this->tableName( $row[1] )] = array(
 730                                         'sequence' => $row[0],
 731                                         'column' => $row[2]
 732                                 );
 733                         }
 734                 }
 735
 736                 return ( isset( $this->sequenceData[$table] ) ) ? $this->sequenceData[$table] : false;
 737         }
 738
 739         /**
 740          * REPLACE query wrapper
 741          * Oracle simulates this with a DELETE followed by INSERT
 742          * $row is the row to insert, an associative array
 743          * $uniqueIndexes is an array of indexes. Each element may be either a
 744          * field name or an array of field names
 745          *
 746          * It may be more efficient to leave off unique indexes which are unlikely to collide.
 747          * However if you do this, you run the risk of encountering errors which wouldn't have
 748          * occurred in MySQL.
 749          *
 750          * @param $table String: table name
 751          * @param $uniqueIndexes Array: array of indexes. Each element may be
 752          *                       either a field name or an array of field names
 753          * @param $rows Array: rows to insert to $table
 754          * @param $fname String: function name, you can use __METHOD__ here
 755          */
 756         function replace( $table, $uniqueIndexes, $rows, $fname = 'DatabaseOracle::replace' ) {
 757                 $table = $this->tableName( $table );
 758
 759                 if ( count( $rows ) == 0 ) {
 760                         return;
 761                 }
 762
 763                 # Single row case
 764                 if ( !is_array( reset( $rows ) ) ) {
 765                         $rows = array( $rows );
 766                 }
 767
 768                 $sequenceData = $this->getSequenceData( $table );
 769
 770                 foreach ( $rows as $row ) {
 771                         # Delete rows which collide
 772                         if ( $uniqueIndexes ) {
 773                                 $condsDelete = array();
 774                                 foreach ( $uniqueIndexes as $index ) {
 775                                         $condsDelete[$index] = $row[$index];
 776                                 }
 777                                 if ( count( $condsDelete ) > 0 ) {
 778                                         $this->delete( $table, $condsDelete, $fname );
 779                                 }
 780                         }
 781
 782                         if ( $sequenceData !== false && !isset( $row[$sequenceData['column']] ) ) {
 783                                 $row[$sequenceData['column']] = $this->nextSequenceValue( $sequenceData['sequence'] );
 784                         }
 785
 786                         # Now insert the row
 787                         $this->insert( $table, $row, $fname );
 788                 }
 789         }
 790
 791         # DELETE where the condition is a join
 792         function deleteJoin( $delTable, $joinTable, $delVar, $joinVar, $conds, $fname = 'DatabaseOracle::deleteJoin' ) {
 793                 if ( !$conds ) {
 794                         throw new DBUnexpectedError( $this, 'DatabaseOracle::deleteJoin() called with empty $conds' );
 795                 }
 796
 797                 $delTable = $this->tableName( $delTable );
 798                 $joinTable = $this->tableName( $joinTable );
 799                 $sql = "DELETE FROM $delTable WHERE $delVar IN (SELECT $joinVar FROM $joinTable ";
 800                 if ( $conds != '*' ) {
 801                         $sql .= 'WHERE ' . $this->makeList( $conds, LIST_AND );
 802                 }
 803                 $sql .= ')';
 804
 805                 $this->query( $sql, $fname );
 806         }
 807
 808         # Returns the size of a text field, or -1 for "unlimited"
 809         function textFieldSize( $table, $field ) {
 810                 $fieldInfoData = $this->fieldInfo( $table, $field);
 811                 if ( $fieldInfoData->type() == 'varchar' ) {
 812                         $size = $row->size - 4;
 813                 } else {
 814                         $size = $row->size;
 815                 }
 816                 return $size;
 817         }
 818
 819         function limitResult( $sql, $limit, $offset = false ) {
 820                 if ( $offset === false ) {
 821                         $offset = 0;
 822                 }
 823                 return "SELECT * FROM ($sql) WHERE rownum >= (1 + $offset) AND rownum < (1 + $limit + $offset)";
 824         }
 825
 826         function encodeBlob( $b ) {
 827                 return new Blob( $b );
 828         }
 829
 830         function decodeBlob( $b ) {
 831                 if ( $b instanceof Blob ) {
 832                         $b = $b->fetch();
 833                 }
 834                 return $b;
 835         }
 836
 837         function unionQueries( $sqls, $all ) {
 838                 $glue = ' UNION ALL ';
 839                 return 'SELECT * ' . ( $all ? '':'/* UNION_UNIQUE */ ' ) . 'FROM (' . implode( $glue, $sqls ) . ')' ;
 840         }
 841
 842         function wasDeadlock() {
 843                 return $this->lastErrno() == 'OCI-00060';
 844         }
 845
 846         function duplicateTableStructure( $oldName, $newName, $temporary = false, $fname = 'DatabaseOracle::duplicateTableStructure' ) {
 847                 global $wgDBprefix;
 848
 849                 $temporary = $temporary ? 'TRUE' : 'FALSE';
 850
 851                 $newName = trim( strtoupper( $newName ), '"');
 852                 $oldName = trim( strtoupper( $oldName ), '"');
 853
 854                 $tabName = substr( $newName, strlen( $wgDBprefix ) );
 855                 $oldPrefix = substr( $oldName, 0, strlen( $oldName ) - strlen( $tabName ) );
 856
 857                 return $this->doQuery( 'BEGIN DUPLICATE_TABLE(\'' . $tabName . '\', \'' . $oldPrefix . '\', \'' . strtoupper( $wgDBprefix ) . '\', ' . $temporary . '); END;' );
 858         }
 859
 860         function timestamp( $ts = 0 ) {
 861                 return wfTimestamp( TS_ORACLE, $ts );
 862         }
 863
 864         /**
 865          * Return aggregated value function call
 866          */
 867         function aggregateValue ( $valuedata, $valuename = 'value' ) {
 868                 return $valuedata;
 869         }
 870
 871         function reportQueryError( $error, $errno, $sql, $fname, $tempIgnore = false ) {
 872                 # Ignore errors during error handling to avoid infinite
 873                 # recursion
 874                 $ignore = $this->ignoreErrors( true );
 875                 ++$this->mErrorCount;
 876
 877                 if ( $ignore || $tempIgnore ) {
 878                         wfDebug( "SQL ERROR (ignored): $error\n" );
 879                         $this->ignoreErrors( $ignore );
 880                 } else {
 881                         throw new DBQueryError( $this, $error, $errno, $sql, $fname );
 882                 }
 883         }
 884
 885         /**
 886          * @return string wikitext of a link to the server software's web site
 887          */
 888         public static function getSoftwareLink() {
 889                 return '[http://www.oracle.com/ Oracle]';
 890         }
 891
 892         /**
 893          * @return string Version information from the database
 894          */
 895         function getServerVersion() {
 896                 //better version number, fallback on driver
 897                 $rset = $this->doQuery( 'SELECT version FROM product_component_version WHERE UPPER(product) LIKE \'ORACLE DATABASE%\'' );
 898                 if ( !( $row =  $rset->fetchRow() ) ) {
 899                         return oci_server_version( $this->mConn );
 900                 }
 901                 return $row['version'];
 902         }
 903
 904         /**
 905          * Query whether a given table exists (in the given schema, or the default mw one if not given)
 906          */
 907         function tableExists( $table ) {
 908                 $SQL = "SELECT 1 FROM user_tables WHERE table_name='$table'";
 909                 $res = $this->doQuery( $SQL );
 910                 if ( $res ) {
 911                         $count = $res->numRows();
 912                         $res->free();
 913                 } else {
 914                         $count = 0;
 915                 }
 916                 return $count;
 917         }
 918
 919         /**
 920          * Function translates mysql_fetch_field() functionality on ORACLE.
 921          * Caching is present for reducing query time.
 922          * For internal calls. Use fieldInfo for normal usage.
 923          * Returns false if the field doesn't exist
 924          *
 925          * @param $table Array
 926          * @param $field String
 927          * @return ORAField
 928          */
 929         private function fieldInfoMulti( $table, $field ) {
 930                 $field = strtoupper( $field );
 931                 if ( is_array( $table ) ) {
 932                         $table = array_map( array( &$this, 'tableName' ), $table );
 933                         $tableWhere = 'IN (';
 934                         foreach( $table as &$singleTable ) {
 935                                 $singleTable = strtoupper( trim( $singleTable, '"' ) );
 936                                 if ( isset( $this->mFieldInfoCache["$singleTable.$field"] ) ) {
 937                                         return $this->mFieldInfoCache["$singleTable.$field"];
 938                                 }
 939                                 $tableWhere .= '\'' . $singleTable . '\',';
 940                         }
 941                         $tableWhere = rtrim( $tableWhere, ',' ) . ')';
 942                 } else {
 943                         $table = strtoupper( trim( $this->tableName( $table ), '"' ) );
 944                         if ( isset( $this->mFieldInfoCache["$table.$field"] ) ) {
 945                                 return $this->mFieldInfoCache["$table.$field"];
 946                         }
 947                         $tableWhere = '= \''.$table.'\'';
 948                 }
 949
 950                 $fieldInfoStmt = oci_parse( $this->mConn, 'SELECT * FROM wiki_field_info_full WHERE table_name '.$tableWhere.' and column_name = \''.$field.'\'' );
 951                 if ( oci_execute( $fieldInfoStmt, OCI_DEFAULT ) === false ) {
 952                         $e = oci_error( $fieldInfoStmt );
 953                         $this->reportQueryError( $e['message'], $e['code'], 'fieldInfo QUERY', __METHOD__ );
 954                         return false;
 955                 }
 956                 $res = new ORAResult( $this, $fieldInfoStmt );
 957                 if ( $res->numRows() == 0 ) {
 958                         if ( is_array( $table ) ) {
 959                                 foreach( $table as &$singleTable ) {
 960                                         $this->mFieldInfoCache["$singleTable.$field"] = false;
 961                                 }
 962                         } else {
 963                                 $this->mFieldInfoCache["$table.$field"] = false;
 964                         }
 965                         $fieldInfoTemp = null;
 966                 } else {
 967                         $fieldInfoTemp = new ORAField( $res->fetchRow() );
 968                         $table = $fieldInfoTemp->tableName();
 969                         $this->mFieldInfoCache["$table.$field"] = $fieldInfoTemp;
 970                 }
 971                 $res->free();
 972                 return $fieldInfoTemp;
 973         }
 974
 975         /**
 976          * @throws DBUnexpectedError
 977          * @param  $table
 978          * @param  $field
 979          * @return ORAField
 980          */
 981         function fieldInfo( $table, $field ) {
 982                 if ( is_array( $table ) ) {
 983                         throw new DBUnexpectedError( $this, 'DatabaseOracle::fieldInfo called with table array!' );
 984                 }
 985                 return $this->fieldInfoMulti ($table, $field);
 986         }
 987
 988         function begin( $fname = '' ) {
 989                 $this->mTrxLevel = 1;
 990         }
 991
 992         function commit( $fname = '' ) {
 993                 oci_commit( $this->mConn );
 994                 $this->mTrxLevel = 0;
 995         }
 996
 997         /* Not even sure why this is used in the main codebase... */
 998         function limitResultForUpdate( $sql, $num ) {
 999                 return $sql;
1000         }
1001
1002         /* defines must comply with ^define\s*([^\s=]*)\s*=\s?'\{\$([^\}]*)\}'; */
1003         function sourceStream( $fp, $lineCallback = false, $resultCallback = false, $fname = 'DatabaseOracle::sourceStream' ) {
1004                 $cmd = '';
1005                 $done = false;
1006                 $dollarquote = false;
1007
1008                 $replacements = array();
1009
1010                 while ( ! feof( $fp ) ) {
1011                         if ( $lineCallback ) {
1012                                 call_user_func( $lineCallback );
1013                         }
1014                         $line = trim( fgets( $fp, 1024 ) );
1015                         $sl = strlen( $line ) - 1;
1016
1017                         if ( $sl < 0 ) {
1018                                 continue;
1019                         }
1020                         if ( '-' == $line { 0 } && '-' == $line { 1 } ) {
1021                                 continue;
1022                         }
1023
1024                         // Allow dollar quoting for function declarations
1025                         if ( substr( $line, 0, 8 ) == '/*$mw$*/' ) {
1026                                 if ( $dollarquote ) {
1027                                         $dollarquote = false;
1028                                         $line = str_replace( '/*$mw$*/', '', $line ); // remove dollarquotes
1029                                         $done = true;
1030                                 } else {
1031                                         $dollarquote = true;
1032                                 }
1033                         } elseif ( !$dollarquote ) {
1034                                 if ( ';' == $line { $sl } && ( $sl < 2 || ';' != $line { $sl - 1 } ) ) {
1035                                         $done = true;
1036                                         $line = substr( $line, 0, $sl );
1037                                 }
1038                         }
1039
1040                         if ( $cmd != '' ) {
1041                                 $cmd .= ' ';
1042                         }
1043                         $cmd .= "$line\n";
1044
1045                         if ( $done ) {
1046                                 $cmd = str_replace( ';;', ";", $cmd );
1047                                 if ( strtolower( substr( $cmd, 0, 6 ) ) == 'define' ) {
1048                                         if ( preg_match( '/^define\s*([^\s=]*)\s*=\s*\'\{\$([^\}]*)\}\'/', $cmd, $defines ) ) {
1049                                                 $replacements[$defines[2]] = $defines[1];
1050                                         }
1051                                 } else {
1052                                         foreach ( $replacements as $mwVar => $scVar ) {
1053                                                 $cmd = str_replace( '&' . $scVar . '.', '{$' . $mwVar . '}', $cmd );
1054                                         }
1055
1056                                         $cmd = $this->replaceVars( $cmd );
1057                                         $res = $this->doQuery( $cmd );
1058                                         if ( $resultCallback ) {
1059                                                 call_user_func( $resultCallback, $res, $this );
1060                                         }
1061
1062                                         if ( false === $res ) {
1063                                                 $err = $this->lastError();
1064                                                 return "Query \"{$cmd}\" failed with error code \"$err\".\n";
1065                                         }
1066                                 }
1067
1068                                 $cmd = '';
1069                                 $done = false;
1070                         }
1071                 }
1072                 return true;
1073         }
1074
1075         function selectDB( $db ) {
1076                 if ( $db == null || $db == $this->mUser ) { return true; }
1077                 $sql = 'ALTER SESSION SET CURRENT_SCHEMA=' . strtoupper($db);
1078                 $stmt = oci_parse( $this->mConn, $sql );
1079                 if ( !oci_execute( $stmt ) ) {
1080                         $e = oci_error( $stmt );
1081                         if ( $e['code'] != '1435' ) {
1082                                 $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
1083                         }
1084                         return false;
1085                 }
1086                 return true;
1087         }
1088
1089         function strencode( $s ) {
1090                 return str_replace( "'", "''", $s );
1091         }
1092
1093         function addQuotes( $s ) {
1094                 global $wgContLang;
1095                 if ( isset( $wgContLang->mLoaded ) && $wgContLang->mLoaded ) {
1096                         $s = $wgContLang->checkTitleEncoding( $s );
1097                 }
1098                 return "'" . $this->strencode( $s ) . "'";
1099         }
1100
1101         function selectRow( $table, $vars, $conds, $fname = 'DatabaseOracle::selectRow', $options = array(), $join_conds = array() ) {
1102                 global $wgContLang;
1103
1104                 $conds2 = array();
1105                 $conds = ( $conds != null && !is_array( $conds ) ) ? array( $conds ) : $conds;
1106                 foreach ( $conds as $col => $val ) {
1107                         $col_info = $this->fieldInfoMulti( $table, $col );
1108                         $col_type = $col_info != false ? $col_info->type() : 'CONSTANT';
1109                         if ( $col_type == 'CLOB' ) {
1110                                 $conds2['TO_CHAR(' . $col . ')'] = $wgContLang->checkTitleEncoding( $val );
1111                         } elseif ( $col_type == 'VARCHAR2' && !mb_check_encoding( $val ) ) {
1112                                 $conds2[$col] = $wgContLang->checkTitleEncoding( $val );
1113                         } else {
1114                                 $conds2[$col] = $val;
1115                         }
1116                 }
1117
1118                 return parent::selectRow( $table, $vars, $conds2, $fname, $options, $join_conds );
1119         }
1120
1121         /**
1122          * Returns an optional USE INDEX clause to go after the table, and a
1123          * string to go at the end of the query
1124          *
1125          * @private
1126          *
1127          * @param $options Array: an associative array of options to be turned into
1128          *              an SQL query, valid keys are listed in the function.
1129          * @return array
1130          */
1131         function makeSelectOptions( $options ) {
1132                 $preLimitTail = $postLimitTail = '';
1133                 $startOpts = '';
1134
1135                 $noKeyOptions = array();
1136                 foreach ( $options as $key => $option ) {
1137                         if ( is_numeric( $key ) ) {
1138                                 $noKeyOptions[$option] = true;
1139                         }
1140                 }
1141
1142                 if ( isset( $options['GROUP BY'] ) ) {
1143                         $preLimitTail .= " GROUP BY {$options['GROUP BY']}";
1144                 }
1145                 if ( isset( $options['ORDER BY'] ) ) {
1146                         $preLimitTail .= " ORDER BY {$options['ORDER BY']}";
1147                 }
1148
1149                 # if ( isset( $noKeyOptions['FOR UPDATE'] ) ) $tailOpts .= ' FOR UPDATE';
1150                 # if ( isset( $noKeyOptions['LOCK IN SHARE MODE'] ) ) $tailOpts .= ' LOCK IN SHARE MODE';
1151                 if ( isset( $noKeyOptions['DISTINCT'] ) || isset( $noKeyOptions['DISTINCTROW'] ) ) {
1152                         $startOpts .= 'DISTINCT';
1153                 }
1154
1155                 if ( isset( $options['USE INDEX'] ) && ! is_array( $options['USE INDEX'] ) ) {
1156                         $useIndex = $this->useIndexClause( $options['USE INDEX'] );
1157                 } else {
1158                         $useIndex = '';
1159                 }
1160
1161                 return array( $startOpts, $useIndex, $preLimitTail, $postLimitTail );
1162         }
1163
1164         public function delete( $table, $conds, $fname = 'DatabaseOracle::delete' ) {
1165                 global $wgContLang;
1166
1167                 if ( $wgContLang != null && $conds != '*' ) {
1168                         $conds2 = array();
1169                         $conds = ( $conds != null && !is_array( $conds ) ) ? array( $conds ) : $conds;
1170                         foreach ( $conds as $col => $val ) {
1171                                 $col_info = $this->fieldInfoMulti( $table, $col );
1172                                 $col_type = $col_info != false ? $col_info->type() : 'CONSTANT';
1173                                 if ( $col_type == 'CLOB' ) {
1174                                         $conds2['TO_CHAR(' . $col . ')'] = $wgContLang->checkTitleEncoding( $val );
1175                                 } else {
1176                                         if ( is_array( $val ) ) {
1177                                                 $conds2[$col] = $val;
1178                                                 foreach ( $conds2[$col] as &$val2 ) {
1179                                                         $val2 = $wgContLang->checkTitleEncoding( $val2 );
1180                                                 }
1181                                         } else {
1182                                                 $conds2[$col] = $wgContLang->checkTitleEncoding( $val );
1183                                         }
1184                                 }
1185                         }
1186
1187                         return parent::delete( $table, $conds2, $fname );
1188                 } else {
1189                         return parent::delete( $table, $conds, $fname );
1190                 }
1191         }
1192
1193         function update( $table, $values, $conds, $fname = 'DatabaseOracle::update', $options = array() ) {
1194                 global $wgContLang;
1195
1196                 $table = $this->tableName( $table );
1197                 $opts = $this->makeUpdateOptions( $options );
1198                 $sql = "UPDATE $opts $table SET ";
1199
1200                 $first = true;
1201                 foreach ( $values as $col => &$val ) {
1202                         $sqlSet = $this->fieldBindStatement( $table, $col, $val, true );
1203
1204                         if ( !$first ) {
1205                                 $sqlSet = ', ' . $sqlSet;
1206                         } else {
1207                                 $first = false;
1208                         }
1209                         $sql .= $sqlSet;
1210                 }
1211
1212                 if ( $conds != '*' ) {
1213                         $sql .= ' WHERE ' . $this->makeList( $conds, LIST_AND );
1214                 }
1215
1216                 if ( ( $this->mLastResult = $stmt = oci_parse( $this->mConn, $sql ) ) === false ) {
1217                         $e = oci_error( $this->mConn );
1218                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
1219                         return false;
1220                 }
1221                 foreach ( $values as $col => &$val ) {
1222                         $col_info = $this->fieldInfoMulti( $table, $col );
1223                         $col_type = $col_info != false ? $col_info->type() : 'CONSTANT';
1224
1225                         if ( $val === null ) {
1226                                 // do nothing ... null was inserted in statement creation
1227                         } elseif ( $col_type != 'BLOB' && $col_type != 'CLOB' ) {
1228                                 if ( is_object( $val ) ) {
1229                                         $val = $val->getData();
1230                                 }
1231
1232                                 if ( preg_match( '/^timestamp.*/i', $col_type ) == 1 && strtolower( $val ) == 'infinity' ) {
1233                                         $val = '31-12-2030 12:00:00.000000';
1234                                 }
1235
1236                                 $val = ( $wgContLang != null ) ? $wgContLang->checkTitleEncoding( $val ) : $val;
1237                                 if ( oci_bind_by_name( $stmt, ":$col", $val ) === false ) {
1238                                         $e = oci_error( $stmt );
1239                                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
1240                                         return false;
1241                                 }
1242                         } else {
1243                                 if ( ( $lob[$col] = oci_new_descriptor( $this->mConn, OCI_D_LOB ) ) === false ) {
1244                                         $e = oci_error( $stmt );
1245                                         throw new DBUnexpectedError( $this, "Cannot create LOB descriptor: " . $e['message'] );
1246                                 }
1247
1248                                 if ( $col_type == 'BLOB' ) {
1249                                         $lob[$col]->writeTemporary( $val );
1250                                         oci_bind_by_name( $stmt, ":$col", $lob[$col], - 1, SQLT_BLOB );
1251                                 } else {
1252                                         $lob[$col]->writeTemporary( $val );
1253                                         oci_bind_by_name( $stmt, ":$col", $lob[$col], - 1, OCI_B_CLOB );
1254                                 }
1255                         }
1256                 }
1257
1258                 wfSuppressWarnings();
1259
1260                 if ( oci_execute( $stmt, OCI_DEFAULT ) === false ) {
1261                         $e = oci_error( $stmt );
1262                         if ( !$this->ignore_DUP_VAL_ON_INDEX || $e['code'] != '1' ) {
1263                                 $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
1264                                 return false;
1265                         } else {
1266                                 $this->mAffectedRows = oci_num_rows( $stmt );
1267                         }
1268                 } else {
1269                         $this->mAffectedRows = oci_num_rows( $stmt );
1270                 }
1271
1272                 wfRestoreWarnings();
1273
1274                 if ( isset( $lob ) ) {
1275                         foreach ( $lob as $lob_v ) {
1276                                 $lob_v->free();
1277                         }
1278                 }
1279
1280                 if ( !$this->mTrxLevel ) {
1281                         oci_commit( $this->mConn );
1282                 }
1283
1284                 oci_free_statement( $stmt );
1285         }
1286
1287         function bitNot( $field ) {
1288                 // expecting bit-fields smaller than 4bytes
1289                 return 'BITNOT(' . $field . ')';
1290         }
1291
1292         function bitAnd( $fieldLeft, $fieldRight ) {
1293                 return 'BITAND(' . $fieldLeft . ', ' . $fieldRight . ')';
1294         }
1295
1296         function bitOr( $fieldLeft, $fieldRight ) {
1297                 return 'BITOR(' . $fieldLeft . ', ' . $fieldRight . ')';
1298         }
1299
1300         function setFakeMaster( $enabled = true ) { }
1301
1302         function getDBname() {
1303                 return $this->mDBname;
1304         }
1305
1306         function getServer() {
1307                 return $this->mServer;
1308         }
1309
1310         public function replaceVars( $ins ) {
1311                 $varnames = array( 'wgDBprefix' );
1312                 if ( $this->mFlags & DBO_SYSDBA ) {
1313                         $varnames[] = '_OracleDefTS';
1314                         $varnames[] = '_OracleTempTS';
1315                 }
1316
1317                 $ins = $this->replaceGlobalVars( $ins, $varnames );
1318
1319                 return parent::replaceVars( $ins );
1320         }
1321
1322         public function getSearchEngine() {
1323                 return 'SearchOracle';
1324         }
1325 } // end DatabaseOracle class