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  * The oci8 extension is fairly weak and doesn't support oci_num_rows, among
  11  * other things.  We use a wrapper class to handle that and other
  12  * Oracle-specific bits, like converting column names back to lowercase.
  13  * @ingroup Database
  14  */
  15 class ORAResult {
  16         private $rows;
  17         private $cursor;
  18         private $nrows;
  19
  20         private $columns = array();
  21
  22         private function array_unique_md( $array_in ) {
  23                 $array_out = array();
  24                 $array_hashes = array();
  25
  26                 foreach ( $array_in as $item ) {
  27                         $hash = md5( serialize( $item ) );
  28                         if ( !isset( $array_hashes[$hash] ) ) {
  29                                 $array_hashes[$hash] = $hash;
  30                                 $array_out[] = $item;
  31                         }
  32                 }
  33
  34                 return $array_out;
  35         }
  36
  37         /**
  38          * @param $db DatabaseBase
  39          * @param $stmt
  40          * @param bool $unique
  41          */
  42         function __construct( &$db, $stmt, $unique = false ) {
  43                 $this->db =& $db;
  44
  45                 if ( ( $this->nrows = oci_fetch_all( $stmt, $this->rows, 0, - 1, OCI_FETCHSTATEMENT_BY_ROW | OCI_NUM ) ) === false ) {
  46                         $e = oci_error( $stmt );
  47                         $db->reportQueryError( $e['message'], $e['code'], '', __METHOD__ );
  48                         $this->free();
  49                         return;
  50                 }
  51
  52                 if ( $unique ) {
  53                         $this->rows = $this->array_unique_md( $this->rows );
  54                         $this->nrows = count( $this->rows );
  55                 }
  56
  57                 if ($this->nrows > 0) {
  58                         foreach ( $this->rows[0] as $k => $v ) {
  59                                 $this->columns[$k] = strtolower( oci_field_name( $stmt, $k + 1 ) );
  60                         }
  61                 }
  62
  63                 $this->cursor = 0;
  64                 oci_free_statement( $stmt );
  65         }
  66
  67         public function free() {
  68                 unset($this->db);
  69         }
  70
  71         public function seek( $row ) {
  72                 $this->cursor = min( $row, $this->nrows );
  73         }
  74
  75         public function numRows() {
  76                 return $this->nrows;
  77         }
  78
  79         public function numFields() {
  80                 return count($this->columns);
  81         }
  82
  83         public function fetchObject() {
  84                 if ( $this->cursor >= $this->nrows ) {
  85                         return false;
  86                 }
  87                 $row = $this->rows[$this->cursor++];
  88                 $ret = new stdClass();
  89                 foreach ( $row as $k => $v ) {
  90                         $lc = $this->columns[$k];
  91                         $ret->$lc = $v;
  92                 }
  93
  94                 return $ret;
  95         }
  96
  97         public function fetchRow() {
  98                 if ( $this->cursor >= $this->nrows ) {
  99                         return false;
 100                 }
 101
 102                 $row = $this->rows[$this->cursor++];
 103                 $ret = array();
 104                 foreach ( $row as $k => $v ) {
 105                         $lc = $this->columns[$k];
 106                         $ret[$lc] = $v;
 107                         $ret[$k] = $v;
 108                 }
 109                 return $ret;
 110         }
 111 }
 112
 113 /**
 114  * Utility class.
 115  * @ingroup Database
 116  */
 117 class ORAField implements Field {
 118         private $name, $tablename, $default, $max_length, $nullable,
 119                 $is_pk, $is_unique, $is_multiple, $is_key, $type;
 120
 121         function __construct( $info ) {
 122                 $this->name = $info['column_name'];
 123                 $this->tablename = $info['table_name'];
 124                 $this->default = $info['data_default'];
 125                 $this->max_length = $info['data_length'];
 126                 $this->nullable = $info['not_null'];
 127                 $this->is_pk = isset( $info['prim'] ) && $info['prim'] == 1 ? 1 : 0;
 128                 $this->is_unique = isset( $info['uniq'] ) && $info['uniq'] == 1 ? 1 : 0;
 129                 $this->is_multiple = isset( $info['nonuniq'] ) && $info['nonuniq'] == 1 ? 1 : 0;
 130                 $this->is_key = ( $this->is_pk || $this->is_unique || $this->is_multiple );
 131                 $this->type = $info['data_type'];
 132         }
 133
 134         function name() {
 135                 return $this->name;
 136         }
 137
 138         function tableName() {
 139                 return $this->tablename;
 140         }
 141
 142         function defaultValue() {
 143                 return $this->default;
 144         }
 145
 146         function maxLength() {
 147                 return $this->max_length;
 148         }
 149
 150         function isNullable() {
 151                 return $this->nullable;
 152         }
 153
 154         function isKey() {
 155                 return $this->is_key;
 156         }
 157
 158         function isMultipleKey() {
 159                 return $this->is_multiple;
 160         }
 161
 162         function type() {
 163                 return $this->type;
 164         }
 165 }
 166
 167 /**
 168  * @ingroup Database
 169  */
 170 class DatabaseOracle extends DatabaseBase {
 171         var $mInsertId = null;
 172         var $mLastResult = null;
 173         var $lastResult = null;
 174         var $cursor = 0;
 175         var $mAffectedRows;
 176
 177         var $ignore_DUP_VAL_ON_INDEX = false;
 178         var $sequenceData = null;
 179
 180         var $defaultCharset = 'AL32UTF8';
 181
 182         var $mFieldInfoCache = array();
 183
 184         function __construct( $server = false, $user = false, $password = false, $dbName = false,
 185                 $flags = 0, $tablePrefix = 'get from global' )
 186         {
 187                 global $wgDBprefix;
 188                 $tablePrefix = $tablePrefix == 'get from global' ? strtoupper( $wgDBprefix ) : strtoupper( $tablePrefix );
 189                 parent::__construct( $server, $user, $password, $dbName, $flags, $tablePrefix );
 190                 wfRunHooks( 'DatabaseOraclePostInit', array( $this ) );
 191         }
 192
 193         function __destruct() {
 194                 if ($this->mOpened) {
 195                         wfSuppressWarnings();
 196                         $this->close();
 197                         wfRestoreWarnings();
 198                 }
 199         }
 200
 201         function getType() {
 202                 return 'oracle';
 203         }
 204
 205         function cascadingDeletes() {
 206                 return true;
 207         }
 208         function cleanupTriggers() {
 209                 return true;
 210         }
 211         function strictIPs() {
 212                 return true;
 213         }
 214         function realTimestamps() {
 215                 return true;
 216         }
 217         function implicitGroupby() {
 218                 return false;
 219         }
 220         function implicitOrderby() {
 221                 return false;
 222         }
 223         function searchableIPs() {
 224                 return true;
 225         }
 226
 227         /**
 228          * Usually aborts on failure
 229          * @return DatabaseBase|null
 230          */
 231         function open( $server, $user, $password, $dbName ) {
 232                 if ( !function_exists( 'oci_connect' ) ) {
 233                         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" );
 234                 }
 235
 236                 $this->close();
 237                 $this->mUser = $user;
 238                 $this->mPassword = $password;
 239                 // changed internal variables functions
 240                 // mServer now holds the TNS endpoint
 241                 // mDBname is schema name if different from username
 242                 if ( !$server ) {
 243                         // backward compatibillity (server used to be null and TNS was supplied in dbname)
 244                         $this->mServer = $dbName;
 245                         $this->mDBname = $user;
 246                 } else {
 247                         $this->mServer = $server;
 248                         if ( !$dbName ) {
 249                                 $this->mDBname = $user;
 250                         } else {
 251                                 $this->mDBname = $dbName;
 252                         }
 253                 }
 254
 255                 if ( !strlen( $user ) ) { # e.g. the class is being loaded
 256                         return;
 257                 }
 258
 259                 $session_mode = $this->mFlags & DBO_SYSDBA ? OCI_SYSDBA : OCI_DEFAULT;
 260                 wfSuppressWarnings();
 261                 if ( $this->mFlags & DBO_DEFAULT ) {
 262                         $this->mConn = oci_new_connect( $this->mUser, $this->mPassword, $this->mServer, $this->defaultCharset, $session_mode );
 263                 } else {
 264                         $this->mConn = oci_connect( $this->mUser, $this->mPassword, $this->mServer, $this->defaultCharset, $session_mode );
 265                 }
 266                 wfRestoreWarnings();
 267
 268                 if ( $this->mUser != $this->mDBname ) {
 269                         //change current schema in session
 270                         $this->selectDB( $this->mDBname );
 271                 }
 272
 273                 if ( !$this->mConn ) {
 274                         throw new DBConnectionError( $this, $this->lastError() );
 275                 }
 276
 277                 $this->mOpened = true;
 278
 279                 # removed putenv calls because they interfere with the system globaly
 280                 $this->doQuery( 'ALTER SESSION SET NLS_TIMESTAMP_FORMAT=\'DD-MM-YYYY HH24:MI:SS.FF6\'' );
 281                 $this->doQuery( 'ALTER SESSION SET NLS_TIMESTAMP_TZ_FORMAT=\'DD-MM-YYYY HH24:MI:SS.FF6\'' );
 282                 $this->doQuery( 'ALTER SESSION SET NLS_NUMERIC_CHARACTERS=\'.,\'' );
 283                 return $this->mConn;
 284         }
 285
 286         /**
 287          * Closes a database connection, if it is open
 288          * Returns success, true if already closed
 289          * @return bool
 290          */
 291         function close() {
 292                 $this->mOpened = false;
 293                 if ( $this->mConn ) {
 294                         if ( $this->mTrxLevel ) {
 295                                 $this->commit();
 296                         }
 297                         return oci_close( $this->mConn );
 298                 } else {
 299                         return true;
 300                 }
 301         }
 302
 303         function execFlags() {
 304                 return $this->mTrxLevel ? OCI_NO_AUTO_COMMIT : OCI_COMMIT_ON_SUCCESS;
 305         }
 306
 307         protected function doQuery( $sql ) {
 308                 wfDebug( "SQL: [$sql]\n" );
 309                 if ( !mb_check_encoding( $sql ) ) {
 310                         throw new MWException( "SQL encoding is invalid\n$sql" );
 311                 }
 312
 313                 // handle some oracle specifics
 314                 // remove AS column/table/subquery namings
 315                 if( !$this->getFlag( DBO_DDLMODE ) ) {
 316                         $sql = preg_replace( '/ as /i', ' ', $sql );
 317                 }
 318
 319                 // Oracle has issues with UNION clause if the statement includes LOB fields
 320                 // So we do a UNION ALL and then filter the results array with array_unique
 321                 $union_unique = ( preg_match( '/\/\* UNION_UNIQUE \*\/ /', $sql ) != 0 );
 322                 // EXPLAIN syntax in Oracle is EXPLAIN PLAN FOR and it return nothing
 323                 // you have to select data from plan table after explain
 324                 $explain_id = date( 'dmYHis' );
 325
 326                 $sql = preg_replace( '/^EXPLAIN /', 'EXPLAIN PLAN SET STATEMENT_ID = \'' . $explain_id . '\' FOR', $sql, 1, $explain_count );
 327
 328                 wfSuppressWarnings();
 329
 330                 if ( ( $this->mLastResult = $stmt = oci_parse( $this->mConn, $sql ) ) === false ) {
 331                         $e = oci_error( $this->mConn );
 332                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 333                         return false;
 334                 }
 335
 336                 if ( !oci_execute( $stmt, $this->execFlags() ) ) {
 337                         $e = oci_error( $stmt );
 338                         if ( !$this->ignore_DUP_VAL_ON_INDEX || $e['code'] != '1' ) {
 339                                 $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 340                                 return false;
 341                         }
 342                 }
 343
 344                 wfRestoreWarnings();
 345
 346                 if ( $explain_count > 0 ) {
 347                         return $this->doQuery( 'SELECT id, cardinality "ROWS" FROM plan_table WHERE statement_id = \'' . $explain_id . '\'' );
 348                 } elseif ( oci_statement_type( $stmt ) == 'SELECT' ) {
 349                         return new ORAResult( $this, $stmt, $union_unique );
 350                 } else {
 351                         $this->mAffectedRows = oci_num_rows( $stmt );
 352                         return true;
 353                 }
 354         }
 355
 356         function queryIgnore( $sql, $fname = '' ) {
 357                 return $this->query( $sql, $fname, true );
 358         }
 359
 360         function freeResult( $res ) {
 361                 if ( $res instanceof ResultWrapper ) {
 362                         $res = $res->result;
 363                 }
 364
 365                 $res->free();
 366         }
 367
 368         function fetchObject( $res ) {
 369                 if ( $res instanceof ResultWrapper ) {
 370                         $res = $res->result;
 371                 }
 372
 373                 return $res->fetchObject();
 374         }
 375
 376         function fetchRow( $res ) {
 377                 if ( $res instanceof ResultWrapper ) {
 378                         $res = $res->result;
 379                 }
 380
 381                 return $res->fetchRow();
 382         }
 383
 384         function numRows( $res ) {
 385                 if ( $res instanceof ResultWrapper ) {
 386                         $res = $res->result;
 387                 }
 388
 389                 return $res->numRows();
 390         }
 391
 392         function numFields( $res ) {
 393                 if ( $res instanceof ResultWrapper ) {
 394                         $res = $res->result;
 395                 }
 396
 397                 return $res->numFields();
 398         }
 399
 400         function fieldName( $stmt, $n ) {
 401                 return oci_field_name( $stmt, $n );
 402         }
 403
 404         /**
 405          * This must be called after nextSequenceVal
 406          * @return null
 407          */
 408         function insertId() {
 409                 return $this->mInsertId;
 410         }
 411
 412         function dataSeek( $res, $row ) {
 413                 if ( $res instanceof ORAResult ) {
 414                         $res->seek( $row );
 415                 } else {
 416                         $res->result->seek( $row );
 417                 }
 418         }
 419
 420         function lastError() {
 421                 if ( $this->mConn === false ) {
 422                         $e = oci_error();
 423                 } else {
 424                         $e = oci_error( $this->mConn );
 425                 }
 426                 return $e['message'];
 427         }
 428
 429         function lastErrno() {
 430                 if ( $this->mConn === false ) {
 431                         $e = oci_error();
 432                 } else {
 433                         $e = oci_error( $this->mConn );
 434                 }
 435                 return $e['code'];
 436         }
 437
 438         function affectedRows() {
 439                 return $this->mAffectedRows;
 440         }
 441
 442         /**
 443          * Returns information about an index
 444          * If errors are explicitly ignored, returns NULL on failure
 445          * @return bool
 446          */
 447         function indexInfo( $table, $index, $fname = 'DatabaseOracle::indexExists' ) {
 448                 return false;
 449         }
 450
 451         function indexUnique( $table, $index, $fname = 'DatabaseOracle::indexUnique' ) {
 452                 return false;
 453         }
 454
 455         function insert( $table, $a, $fname = 'DatabaseOracle::insert', $options = array() ) {
 456                 if ( !count( $a ) ) {
 457                         return true;
 458                 }
 459
 460                 if ( !is_array( $options ) ) {
 461                         $options = array( $options );
 462                 }
 463
 464                 if ( in_array( 'IGNORE', $options ) ) {
 465                         $this->ignore_DUP_VAL_ON_INDEX = true;
 466                 }
 467
 468                 if ( !is_array( reset( $a ) ) ) {
 469                         $a = array( $a );
 470                 }
 471
 472                 foreach ( $a as &$row ) {
 473                         $this->insertOneRow( $table, $row, $fname );
 474                 }
 475                 $retVal = true;
 476
 477                 if ( in_array( 'IGNORE', $options ) ) {
 478                         $this->ignore_DUP_VAL_ON_INDEX = false;
 479                 }
 480
 481                 return $retVal;
 482         }
 483
 484         private function fieldBindStatement ( $table, $col, &$val, $includeCol = false ) {
 485                 $col_info = $this->fieldInfoMulti( $table, $col );
 486                 $col_type = $col_info != false ? $col_info->type() : 'CONSTANT';
 487
 488                 $bind = '';
 489                 if ( is_numeric( $col ) ) {
 490                         $bind = $val;
 491                         $val = null;
 492                         return $bind;
 493                 } elseif ( $includeCol ) {
 494                         $bind = "$col = ";
 495                 }
 496
 497                 if ( $val == '' && $val !== 0 && $col_type != 'BLOB' && $col_type != 'CLOB' ) {
 498                         $val = null;
 499                 }
 500
 501                 if ( $val === 'NULL' ) {
 502                         $val = null;
 503                 }
 504
 505                 if ( $val === null ) {
 506                         if ( $col_info != false && $col_info->isNullable() == 0 && $col_info->defaultValue() != null ) {
 507                                 $bind .= 'DEFAULT';
 508                         } else {
 509                                 $bind .= 'NULL';
 510                         }
 511                 } else {
 512                         $bind .= ':' . $col;
 513                 }
 514
 515                 return $bind;
 516         }
 517
 518         private function insertOneRow( $table, $row, $fname ) {
 519                 global $wgContLang;
 520
 521                 $table = $this->tableName( $table );
 522                 // "INSERT INTO tables (a, b, c)"
 523                 $sql = "INSERT INTO " . $table . " (" . join( ',', array_keys( $row ) ) . ')';
 524                 $sql .= " VALUES (";
 525
 526                 // for each value, append ":key"
 527                 $first = true;
 528                 foreach ( $row as $col => &$val ) {
 529                         if ( !$first ) {
 530                                 $sql .= ', ';
 531                         } else {
 532                                 $first = false;
 533                         }
 534
 535                         $sql .= $this->fieldBindStatement( $table, $col, $val );
 536                 }
 537                 $sql .= ')';
 538
 539                 if ( ( $this->mLastResult = $stmt = oci_parse( $this->mConn, $sql ) ) === false ) {
 540                         $e = oci_error( $this->mConn );
 541                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 542                         return false;
 543                 }
 544                 foreach ( $row as $col => &$val ) {
 545                         $col_info = $this->fieldInfoMulti( $table, $col );
 546                         $col_type = $col_info != false ? $col_info->type() : 'CONSTANT';
 547
 548                         if ( $val === null ) {
 549                                 // do nothing ... null was inserted in statement creation
 550                         } elseif ( $col_type != 'BLOB' && $col_type != 'CLOB' ) {
 551                                 if ( is_object( $val ) ) {
 552                                         $val = $val->fetch();
 553                                 }
 554
 555                                 // backward compatibility
 556                                 if ( preg_match( '/^timestamp.*/i', $col_type ) == 1 && strtolower( $val ) == 'infinity' ) {
 557                                         $val = $this->getInfinity();
 558                                 }
 559
 560                                 $val = ( $wgContLang != null ) ? $wgContLang->checkTitleEncoding( $val ) : $val;
 561                                 if ( oci_bind_by_name( $stmt, ":$col", $val, -1, SQLT_CHR ) === false ) {
 562                                         $e = oci_error( $stmt );
 563                                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 564                                         return false;
 565                                 }
 566                         } else {
 567                                 if ( ( $lob[$col] = oci_new_descriptor( $this->mConn, OCI_D_LOB ) ) === false ) {
 568                                         $e = oci_error( $stmt );
 569                                         throw new DBUnexpectedError( $this, "Cannot create LOB descriptor: " . $e['message'] );
 570                                 }
 571
 572                                 if ( is_object( $val ) ) {
 573                                         $val = $val->fetch();
 574                                 }
 575
 576                                 if ( $col_type == 'BLOB' ) {
 577                                         $lob[$col]->writeTemporary( $val, OCI_TEMP_BLOB );
 578                                         oci_bind_by_name( $stmt, ":$col", $lob[$col], - 1, OCI_B_BLOB );
 579                                 } else {
 580                                         $lob[$col]->writeTemporary( $val, OCI_TEMP_CLOB );
 581                                         oci_bind_by_name( $stmt, ":$col", $lob[$col], - 1, OCI_B_CLOB );
 582                                 }
 583                         }
 584                 }
 585
 586                 wfSuppressWarnings();
 587
 588                 if ( oci_execute( $stmt, $this->execFlags() ) === false ) {
 589                         $e = oci_error( $stmt );
 590                         if ( !$this->ignore_DUP_VAL_ON_INDEX || $e['code'] != '1' ) {
 591                                 $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 592                                 return false;
 593                         } else {
 594                                 $this->mAffectedRows = oci_num_rows( $stmt );
 595                         }
 596                 } else {
 597                         $this->mAffectedRows = oci_num_rows( $stmt );
 598                 }
 599
 600                 wfRestoreWarnings();
 601
 602                 if ( isset( $lob ) ) {
 603                         foreach ( $lob as $lob_v ) {
 604                                 $lob_v->free();
 605                         }
 606                 }
 607
 608                 if ( !$this->mTrxLevel ) {
 609                         oci_commit( $this->mConn );
 610                 }
 611
 612                 oci_free_statement( $stmt );
 613         }
 614
 615         function insertSelect( $destTable, $srcTable, $varMap, $conds, $fname = 'DatabaseOracle::insertSelect',
 616                 $insertOptions = array(), $selectOptions = array() )
 617         {
 618                 $destTable = $this->tableName( $destTable );
 619                 if ( !is_array( $selectOptions ) ) {
 620                         $selectOptions = array( $selectOptions );
 621                 }
 622                 list( $startOpts, $useIndex, $tailOpts ) = $this->makeSelectOptions( $selectOptions );
 623                 if ( is_array( $srcTable ) ) {
 624                         $srcTable =  implode( ',', array_map( array( &$this, 'tableName' ), $srcTable ) );
 625                 } else {
 626                         $srcTable = $this->tableName( $srcTable );
 627                 }
 628
 629                 if ( ( $sequenceData = $this->getSequenceData( $destTable ) ) !== false &&
 630                                 !isset( $varMap[$sequenceData['column']] ) )
 631                 {
 632                         $varMap[$sequenceData['column']] = 'GET_SEQUENCE_VALUE(\'' . $sequenceData['sequence'] . '\')';
 633                 }
 634
 635                 // count-alias subselect fields to avoid abigious definition errors
 636                 $i = 0;
 637                 foreach ( $varMap as &$val ) {
 638                         $val = $val . ' field' . ( $i++ );
 639                 }
 640
 641                 $sql = "INSERT INTO $destTable (" . implode( ',', array_keys( $varMap ) ) . ')' .
 642                         " SELECT $startOpts " . implode( ',', $varMap ) .
 643                         " FROM $srcTable $useIndex ";
 644                 if ( $conds != '*' ) {
 645                         $sql .= ' WHERE ' . $this->makeList( $conds, LIST_AND );
 646                 }
 647                 $sql .= " $tailOpts";
 648
 649                 if ( in_array( 'IGNORE', $insertOptions ) ) {
 650                         $this->ignore_DUP_VAL_ON_INDEX = true;
 651                 }
 652
 653                 $retval = $this->query( $sql, $fname );
 654
 655                 if ( in_array( 'IGNORE', $insertOptions ) ) {
 656                         $this->ignore_DUP_VAL_ON_INDEX = false;
 657                 }
 658
 659                 return $retval;
 660         }
 661
 662         function tableName( $name, $format = 'quoted' ) {
 663                 /*
 664                 Replace reserved words with better ones
 665                 Using uppercase because that's the only way Oracle can handle
 666                 quoted tablenames
 667                 */
 668                 switch( $name ) {
 669                         case 'user':
 670                                 $name = 'MWUSER';
 671                                 break;
 672                         case 'text':
 673                                 $name = 'PAGECONTENT';
 674                                 break;
 675                 }
 676
 677                 return parent::tableName( strtoupper( $name ), $format );
 678         }
 679
 680         function tableNameInternal( $name ) {
 681                 $name = $this->tableName( $name );
 682                 return preg_replace( '/.*\.(.*)/', '$1', $name);
 683         }
 684         /**
 685          * Return the next in a sequence, save the value for retrieval via insertId()
 686          * @return null
 687          */
 688         function nextSequenceValue( $seqName ) {
 689                 $res = $this->query( "SELECT $seqName.nextval FROM dual" );
 690                 $row = $this->fetchRow( $res );
 691                 $this->mInsertId = $row[0];
 692                 return $this->mInsertId;
 693         }
 694
 695         /**
 696          * Return sequence_name if table has a sequence
 697          * @return bool
 698          */
 699         private function getSequenceData( $table ) {
 700                 if ( $this->sequenceData == null ) {
 701                         $result = $this->doQuery( "SELECT lower(asq.sequence_name),
 702                                    lower(atc.table_name),
 703                                    lower(atc.column_name)
 704                           FROM all_sequences asq, all_tab_columns atc
 705                          WHERE decode(atc.table_name, '{$this->mTablePrefix}MWUSER', '{$this->mTablePrefix}USER', atc.table_name) || '_' ||
 706                                    atc.column_name || '_SEQ' = '{$this->mTablePrefix}' || asq.sequence_name
 707                            AND asq.sequence_owner = upper('{$this->mDBname}')
 708                            AND atc.owner = upper('{$this->mDBname}')" );
 709
 710                         while ( ( $row = $result->fetchRow() ) !== false ) {
 711                                 $this->sequenceData[$row[1]] = array(
 712                                         'sequence' => $row[0],
 713                                         'column' => $row[2]
 714                                 );
 715                         }
 716                 }
 717                 $table = strtolower( $this->removeIdentifierQuotes( $this->tableName( $table ) ) );
 718                 return ( isset( $this->sequenceData[$table] ) ) ? $this->sequenceData[$table] : false;
 719         }
 720
 721         # Returns the size of a text field, or -1 for "unlimited"
 722         function textFieldSize( $table, $field ) {
 723                 $fieldInfoData = $this->fieldInfo( $table, $field );
 724                 return $fieldInfoData->maxLength();
 725         }
 726
 727         function limitResult( $sql, $limit, $offset = false ) {
 728                 if ( $offset === false ) {
 729                         $offset = 0;
 730                 }
 731                 return "SELECT * FROM ($sql) WHERE rownum >= (1 + $offset) AND rownum < (1 + $limit + $offset)";
 732         }
 733
 734         function encodeBlob( $b ) {
 735                 return new Blob( $b );
 736         }
 737
 738         function decodeBlob( $b ) {
 739                 if ( $b instanceof Blob ) {
 740                         $b = $b->fetch();
 741                 }
 742                 return $b;
 743         }
 744
 745         function unionQueries( $sqls, $all ) {
 746                 $glue = ' UNION ALL ';
 747                 return 'SELECT * ' . ( $all ? '':'/* UNION_UNIQUE */ ' ) . 'FROM (' . implode( $glue, $sqls ) . ')' ;
 748         }
 749
 750         function wasDeadlock() {
 751                 return $this->lastErrno() == 'OCI-00060';
 752         }
 753
 754         function duplicateTableStructure( $oldName, $newName, $temporary = false, $fname = 'DatabaseOracle::duplicateTableStructure' ) {
 755                 $temporary = $temporary ? 'TRUE' : 'FALSE';
 756
 757                 $newName = strtoupper( $newName );
 758                 $oldName = strtoupper( $oldName );
 759
 760                 $tabName = substr( $newName, strlen( $this->mTablePrefix ) );
 761                 $oldPrefix = substr( $oldName, 0, strlen( $oldName ) - strlen( $tabName ) );
 762                 $newPrefix = strtoupper( $this->mTablePrefix );
 763
 764                 return $this->doQuery( "BEGIN DUPLICATE_TABLE( '$tabName', '$oldPrefix', '$newPrefix', $temporary ); END;" );
 765         }
 766
 767         function listTables( $prefix = null, $fname = 'DatabaseOracle::listTables' ) {
 768                 $listWhere = '';
 769                 if (!empty($prefix)) {
 770                         $listWhere = ' AND table_name LIKE \''.strtoupper($prefix).'%\'';
 771                 }
 772
 773                 $owner = strtoupper( $this->mDBname );
 774                 $result = $this->doQuery( "SELECT table_name FROM all_tables WHERE owner='$owner' AND table_name NOT LIKE '%!_IDX\$_' ESCAPE '!' $listWhere" );
 775
 776                 // dirty code ... i know
 777                 $endArray = array();
 778                 $endArray[] = strtoupper($prefix.'MWUSER');
 779                 $endArray[] = strtoupper($prefix.'PAGE');
 780                 $endArray[] = strtoupper($prefix.'IMAGE');
 781                 $fixedOrderTabs = $endArray;
 782                 while (($row = $result->fetchRow()) !== false) {
 783                         if (!in_array($row['table_name'], $fixedOrderTabs))
 784                                 $endArray[] = $row['table_name'];
 785                 }
 786
 787                 return $endArray;
 788         }
 789
 790         public function dropTable( $tableName, $fName = 'DatabaseOracle::dropTable' ) {
 791                 $tableName = $this->tableName($tableName);
 792                 if( !$this->tableExists( $tableName ) ) {
 793                         return false;
 794                 }
 795
 796                 return $this->doQuery( "DROP TABLE $tableName CASCADE CONSTRAINTS PURGE" );
 797         }
 798
 799         function timestamp( $ts = 0 ) {
 800                 return wfTimestamp( TS_ORACLE, $ts );
 801         }
 802
 803         /**
 804          * Return aggregated value function call
 805          */
 806         function aggregateValue ( $valuedata, $valuename = 'value' ) {
 807                 return $valuedata;
 808         }
 809
 810         function reportQueryError( $error, $errno, $sql, $fname, $tempIgnore = false ) {
 811                 # Ignore errors during error handling to avoid infinite
 812                 # recursion
 813                 $ignore = $this->ignoreErrors( true );
 814                 ++$this->mErrorCount;
 815
 816                 if ( $ignore || $tempIgnore ) {
 817                         wfDebug( "SQL ERROR (ignored): $error\n" );
 818                         $this->ignoreErrors( $ignore );
 819                 } else {
 820                         throw new DBQueryError( $this, $error, $errno, $sql, $fname );
 821                 }
 822         }
 823
 824         /**
 825          * @return string wikitext of a link to the server software's web site
 826          */
 827         public static function getSoftwareLink() {
 828                 return '[http://www.oracle.com/ Oracle]';
 829         }
 830
 831         /**
 832          * @return string Version information from the database
 833          */
 834         function getServerVersion() {
 835                 //better version number, fallback on driver
 836                 $rset = $this->doQuery( 'SELECT version FROM product_component_version WHERE UPPER(product) LIKE \'ORACLE DATABASE%\'' );
 837                 if ( !( $row =  $rset->fetchRow() ) ) {
 838                         return oci_server_version( $this->mConn );
 839                 }
 840                 return $row['version'];
 841         }
 842
 843         /**
 844          * Query whether a given index exists
 845          * @return bool
 846          */
 847         function indexExists( $table, $index, $fname = 'DatabaseOracle::indexExists' ) {
 848                 $table = $this->tableName( $table );
 849                 $table = strtoupper( $this->removeIdentifierQuotes( $table ) );
 850                 $index = strtoupper( $index );
 851                 $owner = strtoupper( $this->mDBname );
 852                 $SQL = "SELECT 1 FROM all_indexes WHERE owner='$owner' AND index_name='{$table}_{$index}'";
 853                 $res = $this->doQuery( $SQL );
 854                 if ( $res ) {
 855                         $count = $res->numRows();
 856                         $res->free();
 857                 } else {
 858                         $count = 0;
 859                 }
 860                 return $count != 0;
 861         }
 862
 863         /**
 864          * Query whether a given table exists (in the given schema, or the default mw one if not given)
 865          * @return int
 866          */
 867         function tableExists( $table, $fname = __METHOD__ ) {
 868                 $table = $this->tableName( $table );
 869                 $table = $this->addQuotes( strtoupper( $this->removeIdentifierQuotes( $table ) ) );
 870                 $owner = $this->addQuotes( strtoupper( $this->mDBname ) );
 871                 $SQL = "SELECT 1 FROM all_tables WHERE owner=$owner AND table_name=$table";
 872                 $res = $this->doQuery( $SQL );
 873                 if ( $res ) {
 874                         $count = $res->numRows();
 875                         $res->free();
 876                 } else {
 877                         $count = 0;
 878                 }
 879                 return $count;
 880         }
 881
 882         /**
 883          * Function translates mysql_fetch_field() functionality on ORACLE.
 884          * Caching is present for reducing query time.
 885          * For internal calls. Use fieldInfo for normal usage.
 886          * Returns false if the field doesn't exist
 887          *
 888          * @param $table Array
 889          * @param $field String
 890          * @return ORAField|ORAResult
 891          */
 892         private function fieldInfoMulti( $table, $field ) {
 893                 $field = strtoupper( $field );
 894                 if ( is_array( $table ) ) {
 895                         $table = array_map( array( &$this, 'tableNameInternal' ), $table );
 896                         $tableWhere = 'IN (';
 897                         foreach( $table as &$singleTable ) {
 898                                 $singleTable = $this->removeIdentifierQuotes($singleTable);
 899                                 if ( isset( $this->mFieldInfoCache["$singleTable.$field"] ) ) {
 900                                         return $this->mFieldInfoCache["$singleTable.$field"];
 901                                 }
 902                                 $tableWhere .= '\'' . $singleTable . '\',';
 903                         }
 904                         $tableWhere = rtrim( $tableWhere, ',' ) . ')';
 905                 } else {
 906                         $table = $this->removeIdentifierQuotes(  $this->tableNameInternal( $table ) );
 907                         if ( isset( $this->mFieldInfoCache["$table.$field"] ) ) {
 908                                 return $this->mFieldInfoCache["$table.$field"];
 909                         }
 910                         $tableWhere = '= \''.$table.'\'';
 911                 }
 912
 913                 $fieldInfoStmt = oci_parse( $this->mConn, 'SELECT * FROM wiki_field_info_full WHERE table_name '.$tableWhere.' and column_name = \''.$field.'\'' );
 914                 if ( oci_execute( $fieldInfoStmt, $this->execFlags() ) === false ) {
 915                         $e = oci_error( $fieldInfoStmt );
 916                         $this->reportQueryError( $e['message'], $e['code'], 'fieldInfo QUERY', __METHOD__ );
 917                         return false;
 918                 }
 919                 $res = new ORAResult( $this, $fieldInfoStmt );
 920                 if ( $res->numRows() == 0 ) {
 921                         if ( is_array( $table ) ) {
 922                                 foreach( $table as &$singleTable ) {
 923                                         $this->mFieldInfoCache["$singleTable.$field"] = false;
 924                                 }
 925                         } else {
 926                                 $this->mFieldInfoCache["$table.$field"] = false;
 927                         }
 928                         $fieldInfoTemp = null;
 929                 } else {
 930                         $fieldInfoTemp = new ORAField( $res->fetchRow() );
 931                         $table = $fieldInfoTemp->tableName();
 932                         $this->mFieldInfoCache["$table.$field"] = $fieldInfoTemp;
 933                 }
 934                 $res->free();
 935                 return $fieldInfoTemp;
 936         }
 937
 938         /**
 939          * @throws DBUnexpectedError
 940          * @param  $table
 941          * @param  $field
 942          * @return ORAField
 943          */
 944         function fieldInfo( $table, $field ) {
 945                 if ( is_array( $table ) ) {
 946                         throw new DBUnexpectedError( $this, 'DatabaseOracle::fieldInfo called with table array!' );
 947                 }
 948                 return $this->fieldInfoMulti ($table, $field);
 949         }
 950
 951         function begin( $fname = 'DatabaseOracle::begin' ) {
 952                 $this->mTrxLevel = 1;
 953                 $this->doQuery( 'SET CONSTRAINTS ALL DEFERRED' );
 954         }
 955
 956         function commit( $fname = 'DatabaseOracle::commit' ) {
 957                 if ( $this->mTrxLevel ) {
 958                         $ret = oci_commit( $this->mConn );
 959                         if ( !$ret ) {
 960                                 throw new DBUnexpectedError( $this, $this->lastError() );
 961                         }
 962                         $this->mTrxLevel = 0;
 963                         $this->doQuery( 'SET CONSTRAINTS ALL IMMEDIATE' );
 964                 }
 965         }
 966
 967         function rollback( $fname = 'DatabaseOracle::rollback' ) {
 968                 if ( $this->mTrxLevel ) {
 969                         oci_rollback( $this->mConn );
 970                         $this->mTrxLevel = 0;
 971                         $this->doQuery( 'SET CONSTRAINTS ALL IMMEDIATE' );
 972                 }
 973         }
 974
 975         /* Not even sure why this is used in the main codebase... */
 976         function limitResultForUpdate( $sql, $num ) {
 977                 return $sql;
 978         }
 979
 980         /* defines must comply with ^define\s*([^\s=]*)\s*=\s?'\{\$([^\}]*)\}'; */
 981         function sourceStream( $fp, $lineCallback = false, $resultCallback = false,
 982                 $fname = 'DatabaseOracle::sourceStream', $inputCallback = false ) {
 983                 $cmd = '';
 984                 $done = false;
 985                 $dollarquote = false;
 986
 987                 $replacements = array();
 988
 989                 while ( ! feof( $fp ) ) {
 990                         if ( $lineCallback ) {
 991                                 call_user_func( $lineCallback );
 992                         }
 993                         $line = trim( fgets( $fp, 1024 ) );
 994                         $sl = strlen( $line ) - 1;
 995
 996                         if ( $sl < 0 ) {
 997                                 continue;
 998                         }
 999                         if ( '-' == $line { 0 } && '-' == $line { 1 } ) {
1000                                 continue;
1001                         }
1002
1003                         // Allow dollar quoting for function declarations
1004                         if ( substr( $line, 0, 8 ) == '/*$mw$*/' ) {
1005                                 if ( $dollarquote ) {
1006                                         $dollarquote = false;
1007                                         $line = str_replace( '/*$mw$*/', '', $line ); // remove dollarquotes
1008                                         $done = true;
1009                                 } else {
1010                                         $dollarquote = true;
1011                                 }
1012                         } elseif ( !$dollarquote ) {
1013                                 if ( ';' == $line { $sl } && ( $sl < 2 || ';' != $line { $sl - 1 } ) ) {
1014                                         $done = true;
1015                                         $line = substr( $line, 0, $sl );
1016                                 }
1017                         }
1018
1019                         if ( $cmd != '' ) {
1020                                 $cmd .= ' ';
1021                         }
1022                         $cmd .= "$line\n";
1023
1024                         if ( $done ) {
1025                                 $cmd = str_replace( ';;', ";", $cmd );
1026                                 if ( strtolower( substr( $cmd, 0, 6 ) ) == 'define' ) {
1027                                         if ( preg_match( '/^define\s*([^\s=]*)\s*=\s*\'\{\$([^\}]*)\}\'/', $cmd, $defines ) ) {
1028                                                 $replacements[$defines[2]] = $defines[1];
1029                                         }
1030                                 } else {
1031                                         foreach ( $replacements as $mwVar => $scVar ) {
1032                                                 $cmd = str_replace( '&' . $scVar . '.', '`{$' . $mwVar . '}`', $cmd );
1033                                         }
1034
1035                                         $cmd = $this->replaceVars( $cmd );
1036                                         if ( $inputCallback ) {
1037                                                 call_user_func( $inputCallback, $cmd );
1038                                         }
1039                                         $res = $this->doQuery( $cmd );
1040                                         if ( $resultCallback ) {
1041                                                 call_user_func( $resultCallback, $res, $this );
1042                                         }
1043
1044                                         if ( false === $res ) {
1045                                                 $err = $this->lastError();
1046                                                 return "Query \"{$cmd}\" failed with error code \"$err\".\n";
1047                                         }
1048                                 }
1049
1050                                 $cmd = '';
1051                                 $done = false;
1052                         }
1053                 }
1054                 return true;
1055         }
1056
1057         function selectDB( $db ) {
1058                 $this->mDBname = $db;
1059                 if ( $db == null || $db == $this->mUser ) {
1060                         return true;
1061                 }
1062                 $sql = 'ALTER SESSION SET CURRENT_SCHEMA=' . strtoupper($db);
1063                 $stmt = oci_parse( $this->mConn, $sql );
1064                 wfSuppressWarnings();
1065                 $success = oci_execute( $stmt );
1066                 wfRestoreWarnings();
1067                 if ( !$success ) {
1068                         $e = oci_error( $stmt );
1069                         if ( $e['code'] != '1435' ) {
1070                                 $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
1071                         }
1072                         return false;
1073                 }
1074                 return true;
1075         }
1076
1077         function strencode( $s ) {
1078                 return str_replace( "'", "''", $s );
1079         }
1080
1081         function addQuotes( $s ) {
1082                 global $wgContLang;
1083                 if ( isset( $wgContLang->mLoaded ) && $wgContLang->mLoaded ) {
1084                         $s = $wgContLang->checkTitleEncoding( $s );
1085                 }
1086                 return "'" . $this->strencode( $s ) . "'";
1087         }
1088
1089         public function addIdentifierQuotes( $s ) {
1090                 if ( !$this->getFlag( DBO_DDLMODE ) ) {
1091                         $s = '/*Q*/' . $s;
1092                 }
1093                 return $s;
1094         }
1095
1096         public function removeIdentifierQuotes( $s ) {
1097                 return strpos($s, '/*Q*/') === FALSE ? $s : substr($s, 5);
1098         }
1099
1100         public function isQuotedIdentifier( $s ) {
1101                 return strpos($s, '/*Q*/') !== FALSE;
1102         }
1103
1104         private function wrapFieldForWhere( $table, &$col, &$val ) {
1105                 global $wgContLang;
1106
1107                 $col_info = $this->fieldInfoMulti( $table, $col );
1108                 $col_type = $col_info != false ? $col_info->type() : 'CONSTANT';
1109                 if ( $col_type == 'CLOB' ) {
1110                         $col = 'TO_CHAR(' . $col . ')';
1111                         $val = $wgContLang->checkTitleEncoding( $val );
1112                 } elseif ( $col_type == 'VARCHAR2' && !mb_check_encoding( $val ) ) {
1113                         $val = $wgContLang->checkTitleEncoding( $val );
1114                 }
1115         }
1116
1117         private function wrapConditionsForWhere ( $table, $conds, $parentCol = null ) {
1118                 $conds2 = array();
1119                 foreach ( $conds as $col => $val ) {
1120                         if ( is_array( $val ) ) {
1121                                 $conds2[$col] = $this->wrapConditionsForWhere ( $table, $val, $col );
1122                         } else {
1123                                 if ( is_numeric( $col ) && $parentCol != null ) {
1124                                         $this->wrapFieldForWhere ( $table, $parentCol, $val );
1125                                 } else {
1126                                         $this->wrapFieldForWhere ( $table, $col, $val );
1127                                 }
1128                                 $conds2[$col] = $val;
1129                         }
1130                 }
1131                 return $conds2;
1132         }
1133
1134         function selectRow( $table, $vars, $conds, $fname = 'DatabaseOracle::selectRow', $options = array(), $join_conds = array() ) {
1135                 if ( is_array($conds) ) {
1136                         $conds = $this->wrapConditionsForWhere( $table, $conds );
1137                 }
1138                 return parent::selectRow( $table, $vars, $conds, $fname, $options, $join_conds );
1139         }
1140
1141         /**
1142          * Returns an optional USE INDEX clause to go after the table, and a
1143          * string to go at the end of the query
1144          *
1145          * @private
1146          *
1147          * @param $options Array: an associative array of options to be turned into
1148          *              an SQL query, valid keys are listed in the function.
1149          * @return array
1150          */
1151         function makeSelectOptions( $options ) {
1152                 $preLimitTail = $postLimitTail = '';
1153                 $startOpts = '';
1154
1155                 $noKeyOptions = array();
1156                 foreach ( $options as $key => $option ) {
1157                         if ( is_numeric( $key ) ) {
1158                                 $noKeyOptions[$option] = true;
1159                         }
1160                 }
1161
1162                 if ( isset( $options['GROUP BY'] ) ) {
1163                         $preLimitTail .= " GROUP BY {$options['GROUP BY']}";
1164                 }
1165                 if ( isset( $options['ORDER BY'] ) ) {
1166                         $preLimitTail .= " ORDER BY {$options['ORDER BY']}";
1167                 }
1168
1169                 # if ( isset( $noKeyOptions['FOR UPDATE'] ) ) $tailOpts .= ' FOR UPDATE';
1170                 # if ( isset( $noKeyOptions['LOCK IN SHARE MODE'] ) ) $tailOpts .= ' LOCK IN SHARE MODE';
1171                 if ( isset( $noKeyOptions['DISTINCT'] ) || isset( $noKeyOptions['DISTINCTROW'] ) ) {
1172                         $startOpts .= 'DISTINCT';
1173                 }
1174
1175                 if ( isset( $options['USE INDEX'] ) && ! is_array( $options['USE INDEX'] ) ) {
1176                         $useIndex = $this->useIndexClause( $options['USE INDEX'] );
1177                 } else {
1178                         $useIndex = '';
1179                 }
1180
1181                 return array( $startOpts, $useIndex, $preLimitTail, $postLimitTail );
1182         }
1183
1184         public function delete( $table, $conds, $fname = 'DatabaseOracle::delete' ) {
1185                 if ( is_array($conds) ) {
1186                         $conds = $this->wrapConditionsForWhere( $table, $conds );
1187                 }
1188                 // a hack for deleting pages, users and images (which have non-nullable FKs)
1189                 // all deletions on these tables have transactions so final failure rollbacks these updates
1190                 $table = $this->tableName( $table );
1191                 if ( $table == $this->tableName( 'user' )  ) {
1192                                 $this->update( 'archive', array( 'ar_user' => 0 ), array( 'ar_user' => $conds['user_id'] ), $fname );
1193                                 $this->update( 'ipblocks', array( 'ipb_user' => 0 ), array( 'ipb_user' => $conds['user_id'] ), $fname );
1194                                 $this->update( 'image', array( 'img_user' => 0 ), array( 'img_user' => $conds['user_id'] ), $fname );
1195                                 $this->update( 'oldimage', array( 'oi_user' => 0 ), array( 'oi_user' => $conds['user_id'] ), $fname );
1196                                 $this->update( 'filearchive', array( 'fa_deleted_user' => 0 ), array( 'fa_deleted_user' => $conds['user_id'] ), $fname );
1197                                 $this->update( 'filearchive', array( 'fa_user' => 0 ), array( 'fa_user' => $conds['user_id'] ), $fname );
1198                                 $this->update( 'uploadstash', array( 'us_user' => 0 ), array( 'us_user' => $conds['user_id'] ), $fname );
1199                                 $this->update( 'recentchanges', array( 'rc_user' => 0 ), array( 'rc_user' => $conds['user_id'] ), $fname );
1200                                 $this->update( 'logging', array( 'log_user' => 0 ), array( 'log_user' => $conds['user_id'] ), $fname );
1201                 } elseif ( $table == $this->tableName( 'image' )  ) {
1202                                 $this->update( 'oldimage', array( 'oi_name' => 0 ), array( 'oi_name' => $conds['img_name'] ), $fname );
1203                 }
1204                 return parent::delete( $table, $conds, $fname );
1205         }
1206
1207         function update( $table, $values, $conds, $fname = 'DatabaseOracle::update', $options = array() ) {
1208                 global $wgContLang;
1209
1210                 $table = $this->tableName( $table );
1211                 $opts = $this->makeUpdateOptions( $options );
1212                 $sql = "UPDATE $opts $table SET ";
1213
1214                 $first = true;
1215                 foreach ( $values as $col => &$val ) {
1216                         $sqlSet = $this->fieldBindStatement( $table, $col, $val, true );
1217
1218                         if ( !$first ) {
1219                                 $sqlSet = ', ' . $sqlSet;
1220                         } else {
1221                                 $first = false;
1222                         }
1223                         $sql .= $sqlSet;
1224                 }
1225
1226                 if ( $conds !== array() && $conds !== '*' ) {
1227                         $conds = $this->wrapConditionsForWhere( $table, $conds );
1228                         $sql .= ' WHERE ' . $this->makeList( $conds, LIST_AND );
1229                 }
1230
1231                 if ( ( $this->mLastResult = $stmt = oci_parse( $this->mConn, $sql ) ) === false ) {
1232                         $e = oci_error( $this->mConn );
1233                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
1234                         return false;
1235                 }
1236                 foreach ( $values as $col => &$val ) {
1237                         $col_info = $this->fieldInfoMulti( $table, $col );
1238                         $col_type = $col_info != false ? $col_info->type() : 'CONSTANT';
1239
1240                         if ( $val === null ) {
1241                                 // do nothing ... null was inserted in statement creation
1242                         } elseif ( $col_type != 'BLOB' && $col_type != 'CLOB' ) {
1243                                 if ( is_object( $val ) ) {
1244                                         $val = $val->getData();
1245                                 }
1246
1247                                 if ( preg_match( '/^timestamp.*/i', $col_type ) == 1 && strtolower( $val ) == 'infinity' ) {
1248                                         $val = '31-12-2030 12:00:00.000000';
1249                                 }
1250
1251                                 $val = ( $wgContLang != null ) ? $wgContLang->checkTitleEncoding( $val ) : $val;
1252                                 if ( oci_bind_by_name( $stmt, ":$col", $val ) === false ) {
1253                                         $e = oci_error( $stmt );
1254                                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
1255                                         return false;
1256                                 }
1257                         } else {
1258                                 if ( ( $lob[$col] = oci_new_descriptor( $this->mConn, OCI_D_LOB ) ) === false ) {
1259                                         $e = oci_error( $stmt );
1260                                         throw new DBUnexpectedError( $this, "Cannot create LOB descriptor: " . $e['message'] );
1261                                 }
1262
1263                                 if ( $col_type == 'BLOB' ) {
1264                                         $lob[$col]->writeTemporary( $val );
1265                                         oci_bind_by_name( $stmt, ":$col", $lob[$col], - 1, SQLT_BLOB );
1266                                 } else {
1267                                         $lob[$col]->writeTemporary( $val );
1268                                         oci_bind_by_name( $stmt, ":$col", $lob[$col], - 1, OCI_B_CLOB );
1269                                 }
1270                         }
1271                 }
1272
1273                 wfSuppressWarnings();
1274
1275                 if ( oci_execute( $stmt, $this->execFlags() ) === false ) {
1276                         $e = oci_error( $stmt );
1277                         if ( !$this->ignore_DUP_VAL_ON_INDEX || $e['code'] != '1' ) {
1278                                 $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
1279                                 return false;
1280                         } else {
1281                                 $this->mAffectedRows = oci_num_rows( $stmt );
1282                         }
1283                 } else {
1284                         $this->mAffectedRows = oci_num_rows( $stmt );
1285                 }
1286
1287                 wfRestoreWarnings();
1288
1289                 if ( isset( $lob ) ) {
1290                         foreach ( $lob as $lob_v ) {
1291                                 $lob_v->free();
1292                         }
1293                 }
1294
1295                 if ( !$this->mTrxLevel ) {
1296                         oci_commit( $this->mConn );
1297                 }
1298
1299                 oci_free_statement( $stmt );
1300         }
1301
1302         function bitNot( $field ) {
1303                 // expecting bit-fields smaller than 4bytes
1304                 return 'BITNOT(' . $field . ')';
1305         }
1306
1307         function bitAnd( $fieldLeft, $fieldRight ) {
1308                 return 'BITAND(' . $fieldLeft . ', ' . $fieldRight . ')';
1309         }
1310
1311         function bitOr( $fieldLeft, $fieldRight ) {
1312                 return 'BITOR(' . $fieldLeft . ', ' . $fieldRight . ')';
1313         }
1314
1315         function setFakeMaster( $enabled = true ) {
1316         }
1317
1318         function getDBname() {
1319                 return $this->mDBname;
1320         }
1321
1322         function getServer() {
1323                 return $this->mServer;
1324         }
1325
1326         public function getSearchEngine() {
1327                 return 'SearchOracle';
1328         }
1329
1330         public function getInfinity() {
1331                 return '31-12-2030 12:00:00.000000';
1332         }
1333
1334 } // end DatabaseOracle class