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 $array_out;
  35         }
  36
  37         function __construct( &$db, $stmt, $unique = false ) {
  38                 $this->db =& $db;
  39
  40                 if ( ( $this->nrows = oci_fetch_all( $stmt, $this->rows, 0, - 1, OCI_FETCHSTATEMENT_BY_ROW | OCI_NUM ) ) === false ) {
  41                         $e = oci_error( $stmt );
  42                         $db->reportQueryError( $e['message'], $e['code'], '', __METHOD__ );
  43                         $this->free();
  44                         return;
  45                 }
  46
  47                 if ( $unique ) {
  48                         $this->rows = $this->array_unique_md( $this->rows );
  49                         $this->nrows = count( $this->rows );
  50                 }
  51
  52                 if ($this->nrows > 0) {
  53                         foreach ( $this->rows[0] as $k => $v ) {
  54                                 $this->columns[$k] = strtolower( oci_field_name( $stmt, $k + 1 ) );
  55                         }
  56                 }
  57
  58                 $this->cursor = 0;
  59                 oci_free_statement( $stmt );
  60         }
  61
  62         public function free() {
  63                 unset($this->db);
  64         }
  65
  66         public function seek( $row ) {
  67                 $this->cursor = min( $row, $this->nrows );
  68         }
  69
  70         public function numRows() {
  71                 return $this->nrows;
  72         }
  73
  74         public function numFields() {
  75                 return count($this->columns);
  76         }
  77
  78         public function fetchObject() {
  79                 if ( $this->cursor >= $this->nrows ) {
  80                         return false;
  81                 }
  82                 $row = $this->rows[$this->cursor++];
  83                 $ret = new stdClass();
  84                 foreach ( $row as $k => $v ) {
  85                         $lc = $this->columns[$k];
  86                         $ret->$lc = $v;
  87                 }
  88
  89                 return $ret;
  90         }
  91
  92         public function fetchRow() {
  93                 if ( $this->cursor >= $this->nrows ) {
  94                         return false;
  95                 }
  96
  97                 $row = $this->rows[$this->cursor++];
  98                 $ret = array();
  99                 foreach ( $row as $k => $v ) {
 100                         $lc = $this->columns[$k];
 101                         $ret[$lc] = $v;
 102                         $ret[$k] = $v;
 103                 }
 104                 return $ret;
 105         }
 106 }
 107
 108 /**
 109  * Utility class.
 110  * @ingroup Database
 111  */
 112 class ORAField implements Field {
 113         private $name, $tablename, $default, $max_length, $nullable,
 114                 $is_pk, $is_unique, $is_multiple, $is_key, $type;
 115
 116         function __construct( $info ) {
 117                 $this->name = $info['column_name'];
 118                 $this->tablename = $info['table_name'];
 119                 $this->default = $info['data_default'];
 120                 $this->max_length = $info['data_length'];
 121                 $this->nullable = $info['not_null'];
 122                 $this->is_pk = isset( $info['prim'] ) && $info['prim'] == 1 ? 1 : 0;
 123                 $this->is_unique = isset( $info['uniq'] ) && $info['uniq'] == 1 ? 1 : 0;
 124                 $this->is_multiple = isset( $info['nonuniq'] ) && $info['nonuniq'] == 1 ? 1 : 0;
 125                 $this->is_key = ( $this->is_pk || $this->is_unique || $this->is_multiple );
 126                 $this->type = $info['data_type'];
 127         }
 128
 129         function name() {
 130                 return $this->name;
 131         }
 132
 133         function tableName() {
 134                 return $this->tablename;
 135         }
 136
 137         function defaultValue() {
 138                 return $this->default;
 139         }
 140
 141         function maxLength() {
 142                 return $this->max_length;
 143         }
 144
 145         function isNullable() {
 146                 return $this->nullable;
 147         }
 148
 149         function isKey() {
 150                 return $this->is_key;
 151         }
 152
 153         function isMultipleKey() {
 154                 return $this->is_multiple;
 155         }
 156
 157         function type() {
 158                 return $this->type;
 159         }
 160 }
 161
 162 /**
 163  * @ingroup Database
 164  */
 165 class DatabaseOracle extends DatabaseBase {
 166         var $mInsertId = null;
 167         var $mLastResult = null;
 168         var $numeric_version = null;
 169         var $lastResult = null;
 170         var $cursor = 0;
 171         var $mAffectedRows;
 172
 173         var $ignore_DUP_VAL_ON_INDEX = false;
 174         var $sequenceData = null;
 175
 176         var $defaultCharset = 'AL32UTF8';
 177
 178         var $mFieldInfoCache = array();
 179
 180         function __construct( $server = false, $user = false, $password = false, $dbName = false,
 181                 $flags = 0, $tablePrefix = 'get from global' )
 182         {
 183                 $tablePrefix = $tablePrefix == 'get from global' ? $tablePrefix : strtoupper( $tablePrefix );
 184                 parent::__construct( $server, $user, $password, $dbName, $flags, $tablePrefix );
 185                 wfRunHooks( 'DatabaseOraclePostInit', array( $this ) );
 186         }
 187
 188         function getType() {
 189                 return 'oracle';
 190         }
 191
 192         function cascadingDeletes() {
 193                 return true;
 194         }
 195         function cleanupTriggers() {
 196                 return true;
 197         }
 198         function strictIPs() {
 199                 return true;
 200         }
 201         function realTimestamps() {
 202                 return true;
 203         }
 204         function implicitGroupby() {
 205                 return false;
 206         }
 207         function implicitOrderby() {
 208                 return false;
 209         }
 210         function searchableIPs() {
 211                 return true;
 212         }
 213
 214         /**
 215          * Usually aborts on failure
 216          */
 217         function open( $server, $user, $password, $dbName ) {
 218                 if ( !function_exists( 'oci_connect' ) ) {
 219                         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" );
 220                 }
 221
 222                 $this->close();
 223                 $this->mUser = $user;
 224                 $this->mPassword = $password;
 225                 // changed internal variables functions
 226                 // mServer now holds the TNS endpoint
 227                 // mDBname is schema name if different from username
 228                 if ( !$server ) {
 229                         // backward compatibillity (server used to be null and TNS was supplied in dbname)
 230                         $this->mServer = $dbName;
 231                         $this->mDBname = $user;
 232                 } else {
 233                         $this->mServer = $server;
 234                         if ( !$dbName ) {
 235                                 $this->mDBname = $user;
 236                         } else {
 237                                 $this->mDBname = $dbName;
 238                         }
 239                 }
 240
 241                 if ( !strlen( $user ) ) { # e.g. the class is being loaded
 242                         return;
 243                 }
 244
 245                 $session_mode = $this->mFlags & DBO_SYSDBA ? OCI_SYSDBA : OCI_DEFAULT;
 246                 wfSuppressWarnings();
 247                 if ( $this->mFlags & DBO_DEFAULT ) {
 248                         $this->mConn = oci_new_connect( $this->mUser, $this->mPassword, $this->mServer, $this->defaultCharset, $session_mode );
 249                 } else {
 250                         $this->mConn = oci_connect( $this->mUser, $this->mPassword, $this->mServer, $this->defaultCharset, $session_mode );
 251                 }
 252                 wfRestoreWarnings();
 253
 254                 if ( $this->mUser != $this->mDBname ) {
 255                         //change current schema in session
 256                         $this->selectDB( $this->mDBname );
 257                 }
 258
 259                 if ( !$this->mConn ) {
 260                         throw new DBConnectionError( $this, $this->lastError() );
 261                 }
 262
 263                 $this->mOpened = true;
 264
 265                 # removed putenv calls because they interfere with the system globaly
 266                 $this->doQuery( 'ALTER SESSION SET NLS_TIMESTAMP_FORMAT=\'DD-MM-YYYY HH24:MI:SS.FF6\'' );
 267                 $this->doQuery( 'ALTER SESSION SET NLS_TIMESTAMP_TZ_FORMAT=\'DD-MM-YYYY HH24:MI:SS.FF6\'' );
 268                 return $this->mConn;
 269         }
 270
 271         /**
 272          * Closes a database connection, if it is open
 273          * Returns success, true if already closed
 274          */
 275         function close() {
 276                 $this->mOpened = false;
 277                 if ( $this->mConn ) {
 278                         return oci_close( $this->mConn );
 279                 } else {
 280                         return true;
 281                 }
 282         }
 283
 284         function execFlags() {
 285                 return $this->mTrxLevel ? OCI_DEFAULT : OCI_COMMIT_ON_SUCCESS;
 286         }
 287
 288         function doQuery( $sql ) {
 289                 wfDebug( "SQL: [$sql]\n" );
 290                 if ( !mb_check_encoding( $sql ) ) {
 291                         throw new MWException( "SQL encoding is invalid\n$sql" );
 292                 }
 293
 294                 // handle some oracle specifics
 295                 // remove AS column/table/subquery namings
 296                 if( !$this->getFlag( DBO_DDLMODE ) ) {
 297                         $sql = preg_replace( '/ as /i', ' ', $sql );
 298                 }
 299
 300                 // Oracle has issues with UNION clause if the statement includes LOB fields
 301                 // So we do a UNION ALL and then filter the results array with array_unique
 302                 $union_unique = ( preg_match( '/\/\* UNION_UNIQUE \*\/ /', $sql ) != 0 );
 303                 // EXPLAIN syntax in Oracle is EXPLAIN PLAN FOR and it return nothing
 304                 // you have to select data from plan table after explain
 305                 $explain_id = date( 'dmYHis' );
 306
 307                 $sql = preg_replace( '/^EXPLAIN /', 'EXPLAIN PLAN SET STATEMENT_ID = \'' . $explain_id . '\' FOR', $sql, 1, $explain_count );
 308
 309                 wfSuppressWarnings();
 310
 311                 if ( ( $this->mLastResult = $stmt = oci_parse( $this->mConn, $sql ) ) === false ) {
 312                         $e = oci_error( $this->mConn );
 313                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 314                         return false;
 315                 }
 316
 317                 if ( !oci_execute( $stmt, $this->execFlags() ) ) {
 318                         $e = oci_error( $stmt );
 319                         if ( !$this->ignore_DUP_VAL_ON_INDEX || $e['code'] != '1' ) {
 320                                 $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 321                                 return false;
 322                         }
 323                 }
 324
 325                 wfRestoreWarnings();
 326
 327                 if ( $explain_count > 0 ) {
 328                         return $this->doQuery( 'SELECT id, cardinality "ROWS" FROM plan_table WHERE statement_id = \'' . $explain_id . '\'' );
 329                 } elseif ( oci_statement_type( $stmt ) == 'SELECT' ) {
 330                         return new ORAResult( $this, $stmt, $union_unique );
 331                 } else {
 332                         $this->mAffectedRows = oci_num_rows( $stmt );
 333                         return true;
 334                 }
 335         }
 336
 337         function queryIgnore( $sql, $fname = '' ) {
 338                 return $this->query( $sql, $fname, true );
 339         }
 340
 341         function freeResult( $res ) {
 342                 if ( $res instanceof ResultWrapper ) {
 343                         $res = $res->result;
 344                 }
 345
 346                 $res->free();
 347         }
 348
 349         function fetchObject( $res ) {
 350                 if ( $res instanceof ResultWrapper ) {
 351                         $res = $res->result;
 352                 }
 353
 354                 return $res->fetchObject();
 355         }
 356
 357         function fetchRow( $res ) {
 358                 if ( $res instanceof ResultWrapper ) {
 359                         $res = $res->result;
 360                 }
 361
 362                 return $res->fetchRow();
 363         }
 364
 365         function numRows( $res ) {
 366                 if ( $res instanceof ResultWrapper ) {
 367                         $res = $res->result;
 368                 }
 369
 370                 return $res->numRows();
 371         }
 372
 373         function numFields( $res ) {
 374                 if ( $res instanceof ResultWrapper ) {
 375                         $res = $res->result;
 376                 }
 377
 378                 return $res->numFields();
 379         }
 380
 381         function fieldName( $stmt, $n ) {
 382                 return oci_field_name( $stmt, $n );
 383         }
 384
 385         /**
 386          * This must be called after nextSequenceVal
 387          */
 388         function insertId() {
 389                 return $this->mInsertId;
 390         }
 391
 392         function dataSeek( $res, $row ) {
 393                 if ( $res instanceof ORAResult ) {
 394                         $res->seek( $row );
 395                 } else {
 396                         $res->result->seek( $row );
 397                 }
 398         }
 399
 400         function lastError() {
 401                 if ( $this->mConn === false ) {
 402                         $e = oci_error();
 403                 } else {
 404                         $e = oci_error( $this->mConn );
 405                 }
 406                 return $e['message'];
 407         }
 408
 409         function lastErrno() {
 410                 if ( $this->mConn === false ) {
 411                         $e = oci_error();
 412                 } else {
 413                         $e = oci_error( $this->mConn );
 414                 }
 415                 return $e['code'];
 416         }
 417
 418         function affectedRows() {
 419                 return $this->mAffectedRows;
 420         }
 421
 422         /**
 423          * Returns information about an index
 424          * If errors are explicitly ignored, returns NULL on failure
 425          */
 426         function indexInfo( $table, $index, $fname = 'DatabaseOracle::indexExists' ) {
 427                 return false;
 428         }
 429
 430         function indexUnique( $table, $index, $fname = 'DatabaseOracle::indexUnique' ) {
 431                 return false;
 432         }
 433
 434         function insert( $table, $a, $fname = 'DatabaseOracle::insert', $options = array() ) {
 435                 if ( !count( $a ) ) {
 436                         return true;
 437                 }
 438
 439                 if ( !is_array( $options ) ) {
 440                         $options = array( $options );
 441                 }
 442
 443                 if ( in_array( 'IGNORE', $options ) ) {
 444                         $this->ignore_DUP_VAL_ON_INDEX = true;
 445                 }
 446
 447                 if ( !is_array( reset( $a ) ) ) {
 448                         $a = array( $a );
 449                 }
 450
 451                 foreach ( $a as &$row ) {
 452                         $this->insertOneRow( $table, $row, $fname );
 453                 }
 454                 $retVal = true;
 455
 456                 if ( in_array( 'IGNORE', $options ) ) {
 457                         $this->ignore_DUP_VAL_ON_INDEX = false;
 458                 }
 459
 460                 return $retVal;
 461         }
 462
 463         private function fieldBindStatement ( $table, $col, &$val, $includeCol = false ) {
 464                 $col_info = $this->fieldInfoMulti( $table, $col );
 465                 $col_type = $col_info != false ? $col_info->type() : 'CONSTANT';
 466
 467                 $bind = '';
 468                 if ( is_numeric( $col ) ) {
 469                         $bind = $val;
 470                         $val = null;
 471                         return $bind;
 472                 } else if ( $includeCol ) {
 473                         $bind = "$col = ";
 474                 }
 475
 476                 if ( $val == '' && $val !== 0 && $col_type != 'BLOB' && $col_type != 'CLOB' ) {
 477                         $val = null;
 478                 }
 479
 480                 if ( $val === null ) {
 481                         if ( $col_info != false && $col_info->isNullable() == 0 && $col_info->defaultValue() != null ) {
 482                                 $bind .= 'DEFAULT';
 483                         } else {
 484                                 $bind .= 'NULL';
 485                         }
 486                 } else {
 487                         $bind .= ':' . $col;
 488                 }
 489
 490                 return $bind;
 491         }
 492
 493         private function insertOneRow( $table, $row, $fname ) {
 494                 global $wgContLang;
 495
 496                 $table = $this->tableName( $table );
 497                 // "INSERT INTO tables (a, b, c)"
 498                 $sql = "INSERT INTO " . $table . " (" . join( ',', array_keys( $row ) ) . ')';
 499                 $sql .= " VALUES (";
 500
 501                 // for each value, append ":key"
 502                 $first = true;
 503                 foreach ( $row as $col => &$val ) {
 504                         if ( !$first ) {
 505                                 $sql .= ', ';
 506                         } else {
 507                                 $first = false;
 508                         }
 509
 510                         $sql .= $this->fieldBindStatement( $table, $col, $val );
 511                 }
 512                 $sql .= ')';
 513
 514                 if ( ( $this->mLastResult = $stmt = oci_parse( $this->mConn, $sql ) ) === false ) {
 515                         $e = oci_error( $this->mConn );
 516                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 517                         return false;
 518                 }
 519                 foreach ( $row as $col => &$val ) {
 520                         $col_info = $this->fieldInfoMulti( $table, $col );
 521                         $col_type = $col_info != false ? $col_info->type() : 'CONSTANT';
 522
 523                         if ( $val === null ) {
 524                                 // do nothing ... null was inserted in statement creation
 525                         } elseif ( $col_type != 'BLOB' && $col_type != 'CLOB' ) {
 526                                 if ( is_object( $val ) ) {
 527                                         $val = $val->fetch();
 528                                 }
 529
 530                                 if ( preg_match( '/^timestamp.*/i', $col_type ) == 1 && strtolower( $val ) == 'infinity' ) {
 531                                         $val = '31-12-2030 12:00:00.000000';
 532                                 }
 533
 534                                 $val = ( $wgContLang != null ) ? $wgContLang->checkTitleEncoding( $val ) : $val;
 535                                 if ( oci_bind_by_name( $stmt, ":$col", $val ) === false ) {
 536                                         $e = oci_error( $stmt );
 537                                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 538                                         return false;
 539                                 }
 540                         } else {
 541                                 if ( ( $lob[$col] = oci_new_descriptor( $this->mConn, OCI_D_LOB ) ) === false ) {
 542                                         $e = oci_error( $stmt );
 543                                         throw new DBUnexpectedError( $this, "Cannot create LOB descriptor: " . $e['message'] );
 544                                 }
 545
 546                                 if ( is_object( $val ) ) {
 547                                         $val = $val->fetch();
 548                                 }
 549
 550                                 if ( $col_type == 'BLOB' ) {
 551                                         $lob[$col]->writeTemporary( $val, OCI_TEMP_BLOB );
 552                                         oci_bind_by_name( $stmt, ":$col", $lob[$col], - 1, OCI_B_BLOB );
 553                                 } else {
 554                                         $lob[$col]->writeTemporary( $val, OCI_TEMP_CLOB );
 555                                         oci_bind_by_name( $stmt, ":$col", $lob[$col], - 1, OCI_B_CLOB );
 556                                 }
 557                         }
 558                 }
 559
 560                 wfSuppressWarnings();
 561
 562                 if ( oci_execute( $stmt, OCI_DEFAULT ) === false ) {
 563                         $e = oci_error( $stmt );
 564                         if ( !$this->ignore_DUP_VAL_ON_INDEX || $e['code'] != '1' ) {
 565                                 $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 566                                 return false;
 567                         } else {
 568                                 $this->mAffectedRows = oci_num_rows( $stmt );
 569                         }
 570                 } else {
 571                         $this->mAffectedRows = oci_num_rows( $stmt );
 572                 }
 573
 574                 wfRestoreWarnings();
 575
 576                 if ( isset( $lob ) ) {
 577                         foreach ( $lob as $lob_v ) {
 578                                 $lob_v->free();
 579                         }
 580                 }
 581
 582                 if ( !$this->mTrxLevel ) {
 583                         oci_commit( $this->mConn );
 584                 }
 585
 586                 oci_free_statement( $stmt );
 587         }
 588
 589         function insertSelect( $destTable, $srcTable, $varMap, $conds, $fname = 'DatabaseOracle::insertSelect',
 590                 $insertOptions = array(), $selectOptions = array() )
 591         {
 592                 $destTable = $this->tableName( $destTable );
 593                 if ( !is_array( $selectOptions ) ) {
 594                         $selectOptions = array( $selectOptions );
 595                 }
 596                 list( $startOpts, $useIndex, $tailOpts ) = $this->makeSelectOptions( $selectOptions );
 597                 if ( is_array( $srcTable ) ) {
 598                         $srcTable =  implode( ',', array_map( array( &$this, 'tableName' ), $srcTable ) );
 599                 } else {
 600                         $srcTable = $this->tableName( $srcTable );
 601                 }
 602
 603                 if ( ( $sequenceData = $this->getSequenceData( $destTable ) ) !== false &&
 604                                 !isset( $varMap[$sequenceData['column']] ) )
 605                 {
 606                         $varMap[$sequenceData['column']] = 'GET_SEQUENCE_VALUE(\'' . $sequenceData['sequence'] . '\')';
 607                 }
 608
 609                 // count-alias subselect fields to avoid abigious definition errors
 610                 $i = 0;
 611                 foreach ( $varMap as &$val ) {
 612                         $val = $val . ' field' . ( $i++ );
 613                 }
 614
 615                 $sql = "INSERT INTO $destTable (" . implode( ',', array_keys( $varMap ) ) . ')' .
 616                         " SELECT $startOpts " . implode( ',', $varMap ) .
 617                         " FROM $srcTable $useIndex ";
 618                 if ( $conds != '*' ) {
 619                         $sql .= ' WHERE ' . $this->makeList( $conds, LIST_AND );
 620                 }
 621                 $sql .= " $tailOpts";
 622
 623                 if ( in_array( 'IGNORE', $insertOptions ) ) {
 624                         $this->ignore_DUP_VAL_ON_INDEX = true;
 625                 }
 626
 627                 $retval = $this->query( $sql, $fname );
 628
 629                 if ( in_array( 'IGNORE', $insertOptions ) ) {
 630                         $this->ignore_DUP_VAL_ON_INDEX = false;
 631                 }
 632
 633                 return $retval;
 634         }
 635
 636         function tableName( $name ) {
 637                 global $wgSharedDB, $wgSharedPrefix, $wgSharedTables;
 638                 /*
 639                 Replace reserved words with better ones
 640                 Using uppercase because that's the only way Oracle can handle
 641                 quoted tablenames
 642                 */
 643                 switch( $name ) {
 644                         case 'user':
 645                                 $name = 'MWUSER';
 646                                 break;
 647                         case 'text':
 648                                 $name = 'PAGECONTENT';
 649                                 break;
 650                 }
 651
 652                 /*
 653                         The rest of procedure is equal to generic Databse class
 654                         except for the quoting style
 655                 */
 656                 if ( $name[0] == '"' && substr( $name, - 1, 1 ) == '"' ) {
 657                         return $name;
 658                 }
 659                 if ( preg_match( '/(^|\s)(DISTINCT|JOIN|ON|AS)(\s|$)/i', $name ) !== 0 ) {
 660                         return $name;
 661                 }
 662                 $dbDetails = array_reverse( explode( '.', $name, 2 ) );
 663                 if ( isset( $dbDetails[1] ) ) {
 664                         @list( $table, $database ) = $dbDetails;
 665                 } else {
 666                         @list( $table ) = $dbDetails;
 667                 }
 668
 669                 $prefix = $this->mTablePrefix;
 670
 671                 if ( isset( $database ) ) {
 672                         $table = ( $table[0] == '`' ? $table : "`{$table}`" );
 673                 }
 674
 675                 if ( !isset( $database ) && isset( $wgSharedDB ) && $table[0] != '"'
 676                         && isset( $wgSharedTables )
 677                         && is_array( $wgSharedTables )
 678                         && in_array( $table, $wgSharedTables )
 679                 ) {
 680                         $database = $wgSharedDB;
 681                         $prefix   = isset( $wgSharedPrefix ) ? $wgSharedPrefix : $prefix;
 682                 }
 683
 684                 if ( isset( $database ) ) {
 685                         $database = ( $database[0] == '"' ? $database : "\"{$database}\"" );
 686                 }
 687                 $table = ( $table[0] == '"') ? $table : "\"{$prefix}{$table}\"" ;
 688
 689                 $tableName = ( isset( $database ) ? "{$database}.{$table}" : "{$table}" );
 690
 691                 return strtoupper( $tableName );
 692         }
 693
 694         /**
 695          * Return the next in a sequence, save the value for retrieval via insertId()
 696          */
 697         function nextSequenceValue( $seqName ) {
 698                 $res = $this->query( "SELECT $seqName.nextval FROM dual" );
 699                 $row = $this->fetchRow( $res );
 700                 $this->mInsertId = $row[0];
 701                 return $this->mInsertId;
 702         }
 703
 704         /**
 705          * Return sequence_name if table has a sequence
 706          */
 707         private function getSequenceData( $table ) {
 708                 if ( $this->sequenceData == null ) {
 709                         $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\'' );
 710
 711                         while ( ( $row = $result->fetchRow() ) !== false ) {
 712                                 $this->sequenceData[$this->tableName( $row[1] )] = array(
 713                                         'sequence' => $row[0],
 714                                         'column' => $row[2]
 715                                 );
 716                         }
 717                 }
 718
 719                 return ( isset( $this->sequenceData[$table] ) ) ? $this->sequenceData[$table] : false;
 720         }
 721
 722         /**
 723          * REPLACE query wrapper
 724          * Oracle simulates this with a DELETE followed by INSERT
 725          * $row is the row to insert, an associative array
 726          * $uniqueIndexes is an array of indexes. Each element may be either a
 727          * field name or an array of field names
 728          *
 729          * It may be more efficient to leave off unique indexes which are unlikely to collide.
 730          * However if you do this, you run the risk of encountering errors which wouldn't have
 731          * occurred in MySQL.
 732          *
 733          * @param $table String: table name
 734          * @param $uniqueIndexes Array: array of indexes. Each element may be
 735          *                       either a field name or an array of field names
 736          * @param $rows Array: rows to insert to $table
 737          * @param $fname String: function name, you can use __METHOD__ here
 738          */
 739         function replace( $table, $uniqueIndexes, $rows, $fname = 'DatabaseOracle::replace' ) {
 740                 $table = $this->tableName( $table );
 741
 742                 if ( count( $rows ) == 0 ) {
 743                         return;
 744                 }
 745
 746                 # Single row case
 747                 if ( !is_array( reset( $rows ) ) ) {
 748                         $rows = array( $rows );
 749                 }
 750
 751                 $sequenceData = $this->getSequenceData( $table );
 752
 753                 foreach ( $rows as $row ) {
 754                         # Delete rows which collide
 755                         if ( $uniqueIndexes ) {
 756                                 $condsDelete = array();
 757                                 foreach ( $uniqueIndexes as $index ) {
 758                                         $condsDelete[$index] = $row[$index];
 759                                 }
 760                                 if ( count( $condsDelete ) > 0 ) {
 761                                         $this->delete( $table, $condsDelete, $fname );
 762                                 }
 763                         }
 764
 765                         if ( $sequenceData !== false && !isset( $row[$sequenceData['column']] ) ) {
 766                                 $row[$sequenceData['column']] = $this->nextSequenceValue( $sequenceData['sequence'] );
 767                         }
 768
 769                         # Now insert the row
 770                         $this->insert( $table, $row, $fname );
 771                 }
 772         }
 773
 774         # DELETE where the condition is a join
 775         function deleteJoin( $delTable, $joinTable, $delVar, $joinVar, $conds, $fname = 'DatabaseOracle::deleteJoin' ) {
 776                 if ( !$conds ) {
 777                         throw new DBUnexpectedError( $this, 'DatabaseOracle::deleteJoin() called with empty $conds' );
 778                 }
 779
 780                 $delTable = $this->tableName( $delTable );
 781                 $joinTable = $this->tableName( $joinTable );
 782                 $sql = "DELETE FROM $delTable WHERE $delVar IN (SELECT $joinVar FROM $joinTable ";
 783                 if ( $conds != '*' ) {
 784                         $sql .= 'WHERE ' . $this->makeList( $conds, LIST_AND );
 785                 }
 786                 $sql .= ')';
 787
 788                 $this->query( $sql, $fname );
 789         }
 790
 791         # Returns the size of a text field, or -1 for "unlimited"
 792         function textFieldSize( $table, $field ) {
 793                 $fieldInfoData = $this->fieldInfo( $table, $field );
 794                 return $fieldInfoData->maxLength();
 795         }
 796
 797         function limitResult( $sql, $limit, $offset = false ) {
 798                 if ( $offset === false ) {
 799                         $offset = 0;
 800                 }
 801                 return "SELECT * FROM ($sql) WHERE rownum >= (1 + $offset) AND rownum < (1 + $limit + $offset)";
 802         }
 803
 804         function encodeBlob( $b ) {
 805                 return new Blob( $b );
 806         }
 807
 808         function decodeBlob( $b ) {
 809                 if ( $b instanceof Blob ) {
 810                         $b = $b->fetch();
 811                 }
 812                 return $b;
 813         }
 814
 815         function unionQueries( $sqls, $all ) {
 816                 $glue = ' UNION ALL ';
 817                 return 'SELECT * ' . ( $all ? '':'/* UNION_UNIQUE */ ' ) . 'FROM (' . implode( $glue, $sqls ) . ')' ;
 818         }
 819
 820         function wasDeadlock() {
 821                 return $this->lastErrno() == 'OCI-00060';
 822         }
 823
 824         function duplicateTableStructure( $oldName, $newName, $temporary = false, $fname = 'DatabaseOracle::duplicateTableStructure' ) {
 825                 global $wgDBprefix;
 826
 827                 $temporary = $temporary ? 'TRUE' : 'FALSE';
 828
 829                 $newName = trim( strtoupper( $newName ), '"');
 830                 $oldName = trim( strtoupper( $oldName ), '"');
 831
 832                 $tabName = substr( $newName, strlen( $wgDBprefix ) );
 833                 $oldPrefix = substr( $oldName, 0, strlen( $oldName ) - strlen( $tabName ) );
 834
 835                 return $this->doQuery( 'BEGIN DUPLICATE_TABLE(\'' . $tabName . '\', \'' . $oldPrefix . '\', \'' . strtoupper( $wgDBprefix ) . '\', ' . $temporary . '); END;' );
 836         }
 837
 838         function listTables( $prefix = null, $fname = 'DatabaseOracle::listTables' ) {
 839                 $listWhere = '';
 840                 if (!empty($prefix)) {
 841                         $listWhere = ' AND table_name LIKE \''.strtoupper($prefix).'%\'';
 842                 }
 843
 844                 $result = $this->doQuery( "SELECT table_name FROM user_tables WHERE table_name NOT LIKE '%!_IDX$_' ESCAPE '!' $listWhere" );
 845
 846                 // dirty code ... i know
 847                 $endArray = array();
 848                 $endArray[] = $prefix.'MWUSER';
 849                 $endArray[] = $prefix.'PAGE';
 850                 $endArray[] = $prefix.'IMAGE';
 851                 $fixedOrderTabs = $endArray;
 852                 while (($row = $result->fetchRow()) !== false) {
 853                         if (!in_array($row['table_name'], $fixedOrderTabs))
 854                                 $endArray[] = $row['table_name'];
 855                 }
 856
 857                 return $endArray;
 858         }
 859
 860         public function dropTable( $tableName, $fName = 'DatabaseOracle::dropTable' ) {
 861                 $tableName = $this->tableName($tableName);
 862                 if( !$this->tableExists( $tableName ) ) {
 863                         return false;
 864                 }
 865
 866                 return $this->doQuery( "DROP TABLE $tableName CASCADE CONSTRAINTS PURGE" );
 867         }
 868
 869         function timestamp( $ts = 0 ) {
 870                 return wfTimestamp( TS_ORACLE, $ts );
 871         }
 872
 873         /**
 874          * Return aggregated value function call
 875          */
 876         function aggregateValue ( $valuedata, $valuename = 'value' ) {
 877                 return $valuedata;
 878         }
 879
 880         function reportQueryError( $error, $errno, $sql, $fname, $tempIgnore = false ) {
 881                 # Ignore errors during error handling to avoid infinite
 882                 # recursion
 883                 $ignore = $this->ignoreErrors( true );
 884                 ++$this->mErrorCount;
 885
 886                 if ( $ignore || $tempIgnore ) {
 887                         wfDebug( "SQL ERROR (ignored): $error\n" );
 888                         $this->ignoreErrors( $ignore );
 889                 } else {
 890                         throw new DBQueryError( $this, $error, $errno, $sql, $fname );
 891                 }
 892         }
 893
 894         /**
 895          * @return string wikitext of a link to the server software's web site
 896          */
 897         public static function getSoftwareLink() {
 898                 return '[http://www.oracle.com/ Oracle]';
 899         }
 900
 901         /**
 902          * @return string Version information from the database
 903          */
 904         function getServerVersion() {
 905                 //better version number, fallback on driver
 906                 $rset = $this->doQuery( 'SELECT version FROM product_component_version WHERE UPPER(product) LIKE \'ORACLE DATABASE%\'' );
 907                 if ( !( $row =  $rset->fetchRow() ) ) {
 908                         return oci_server_version( $this->mConn );
 909                 }
 910                 return $row['version'];
 911         }
 912
 913         /**
 914          * Query whether a given table exists (in the given schema, or the default mw one if not given)
 915          */
 916         function tableExists( $table ) {
 917                 $table = trim($this->tableName($table), '"');
 918                 $SQL = "SELECT 1 FROM user_tables WHERE table_name='$table'";
 919                 $res = $this->doQuery( $SQL );
 920                 if ( $res ) {
 921                         $count = $res->numRows();
 922                         $res->free();
 923                 } else {
 924                         $count = 0;
 925                 }
 926                 return $count;
 927         }
 928
 929         /**
 930          * Function translates mysql_fetch_field() functionality on ORACLE.
 931          * Caching is present for reducing query time.
 932          * For internal calls. Use fieldInfo for normal usage.
 933          * Returns false if the field doesn't exist
 934          *
 935          * @param $table Array
 936          * @param $field String
 937          * @return ORAField
 938          */
 939         private function fieldInfoMulti( $table, $field ) {
 940                 $field = strtoupper( $field );
 941                 if ( is_array( $table ) ) {
 942                         $table = array_map( array( &$this, 'tableName' ), $table );
 943                         $tableWhere = 'IN (';
 944                         foreach( $table as &$singleTable ) {
 945                                 $singleTable = strtoupper( trim( $singleTable, '"' ) );
 946                                 if ( isset( $this->mFieldInfoCache["$singleTable.$field"] ) ) {
 947                                         return $this->mFieldInfoCache["$singleTable.$field"];
 948                                 }
 949                                 $tableWhere .= '\'' . $singleTable . '\',';
 950                         }
 951                         $tableWhere = rtrim( $tableWhere, ',' ) . ')';
 952                 } else {
 953                         $table = strtoupper( trim( $this->tableName( $table ), '"' ) );
 954                         if ( isset( $this->mFieldInfoCache["$table.$field"] ) ) {
 955                                 return $this->mFieldInfoCache["$table.$field"];
 956                         }
 957                         $tableWhere = '= \''.$table.'\'';
 958                 }
 959
 960                 $fieldInfoStmt = oci_parse( $this->mConn, 'SELECT * FROM wiki_field_info_full WHERE table_name '.$tableWhere.' and column_name = \''.$field.'\'' );
 961                 if ( oci_execute( $fieldInfoStmt, OCI_DEFAULT ) === false ) {
 962                         $e = oci_error( $fieldInfoStmt );
 963                         $this->reportQueryError( $e['message'], $e['code'], 'fieldInfo QUERY', __METHOD__ );
 964                         return false;
 965                 }
 966                 $res = new ORAResult( $this, $fieldInfoStmt );
 967                 if ( $res->numRows() == 0 ) {
 968                         if ( is_array( $table ) ) {
 969                                 foreach( $table as &$singleTable ) {
 970                                         $this->mFieldInfoCache["$singleTable.$field"] = false;
 971                                 }
 972                         } else {
 973                                 $this->mFieldInfoCache["$table.$field"] = false;
 974                         }
 975                         $fieldInfoTemp = null;
 976                 } else {
 977                         $fieldInfoTemp = new ORAField( $res->fetchRow() );
 978                         $table = $fieldInfoTemp->tableName();
 979                         $this->mFieldInfoCache["$table.$field"] = $fieldInfoTemp;
 980                 }
 981                 $res->free();
 982                 return $fieldInfoTemp;
 983         }
 984
 985         /**
 986          * @throws DBUnexpectedError
 987          * @param  $table
 988          * @param  $field
 989          * @return ORAField
 990          */
 991         function fieldInfo( $table, $field ) {
 992                 if ( is_array( $table ) ) {
 993                         throw new DBUnexpectedError( $this, 'DatabaseOracle::fieldInfo called with table array!' );
 994                 }
 995                 return $this->fieldInfoMulti ($table, $field);
 996         }
 997
 998         function begin( $fname = '' ) {
 999                 $this->mTrxLevel = 1;
1000         }
1001
1002         function commit( $fname = '' ) {
1003                 oci_commit( $this->mConn );
1004                 $this->mTrxLevel = 0;
1005         }
1006
1007         /* Not even sure why this is used in the main codebase... */
1008         function limitResultForUpdate( $sql, $num ) {
1009                 return $sql;
1010         }
1011
1012         /* defines must comply with ^define\s*([^\s=]*)\s*=\s?'\{\$([^\}]*)\}'; */
1013         function sourceStream( $fp, $lineCallback = false, $resultCallback = false, $fname = 'DatabaseOracle::sourceStream' ) {
1014                 $cmd = '';
1015                 $done = false;
1016                 $dollarquote = false;
1017
1018                 $replacements = array();
1019
1020                 while ( ! feof( $fp ) ) {
1021                         if ( $lineCallback ) {
1022                                 call_user_func( $lineCallback );
1023                         }
1024                         $line = trim( fgets( $fp, 1024 ) );
1025                         $sl = strlen( $line ) - 1;
1026
1027                         if ( $sl < 0 ) {
1028                                 continue;
1029                         }
1030                         if ( '-' == $line { 0 } && '-' == $line { 1 } ) {
1031                                 continue;
1032                         }
1033
1034                         // Allow dollar quoting for function declarations
1035                         if ( substr( $line, 0, 8 ) == '/*$mw$*/' ) {
1036                                 if ( $dollarquote ) {
1037                                         $dollarquote = false;
1038                                         $line = str_replace( '/*$mw$*/', '', $line ); // remove dollarquotes
1039                                         $done = true;
1040                                 } else {
1041                                         $dollarquote = true;
1042                                 }
1043                         } elseif ( !$dollarquote ) {
1044                                 if ( ';' == $line { $sl } && ( $sl < 2 || ';' != $line { $sl - 1 } ) ) {
1045                                         $done = true;
1046                                         $line = substr( $line, 0, $sl );
1047                                 }
1048                         }
1049
1050                         if ( $cmd != '' ) {
1051                                 $cmd .= ' ';
1052                         }
1053                         $cmd .= "$line\n";
1054
1055                         if ( $done ) {
1056                                 $cmd = str_replace( ';;', ";", $cmd );
1057                                 if ( strtolower( substr( $cmd, 0, 6 ) ) == 'define' ) {
1058                                         if ( preg_match( '/^define\s*([^\s=]*)\s*=\s*\'\{\$([^\}]*)\}\'/', $cmd, $defines ) ) {
1059                                                 $replacements[$defines[2]] = $defines[1];
1060                                         }
1061                                 } else {
1062                                         foreach ( $replacements as $mwVar => $scVar ) {
1063                                                 $cmd = str_replace( '&' . $scVar . '.', '`{$' . $mwVar . '}`', $cmd );
1064                                         }
1065
1066                                         $cmd = $this->replaceVars( $cmd );
1067                                         $res = $this->doQuery( $cmd );
1068                                         if ( $resultCallback ) {
1069                                                 call_user_func( $resultCallback, $res, $this );
1070                                         }
1071
1072                                         if ( false === $res ) {
1073                                                 $err = $this->lastError();
1074                                                 return "Query \"{$cmd}\" failed with error code \"$err\".\n";
1075                                         }
1076                                 }
1077
1078                                 $cmd = '';
1079                                 $done = false;
1080                         }
1081                 }
1082                 return true;
1083         }
1084
1085         function selectDB( $db ) {
1086                 $this->mDBname = $db;
1087                 if ( $db == null || $db == $this->mUser ) {
1088                         return true;
1089                 }
1090                 $sql = 'ALTER SESSION SET CURRENT_SCHEMA=' . strtoupper($db);
1091                 $stmt = oci_parse( $this->mConn, $sql );
1092                 wfSuppressWarnings();
1093                 $success = oci_execute( $stmt );
1094                 wfRestoreWarnings();
1095                 if ( !$success ) {
1096                         $e = oci_error( $stmt );
1097                         if ( $e['code'] != '1435' ) {
1098                                 $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
1099                         }
1100                         return false;
1101                 }
1102                 return true;
1103         }
1104
1105         function strencode( $s ) {
1106                 return str_replace( "'", "''", $s );
1107         }
1108
1109         function addQuotes( $s ) {
1110                 global $wgContLang;
1111                 if ( isset( $wgContLang->mLoaded ) && $wgContLang->mLoaded ) {
1112                         $s = $wgContLang->checkTitleEncoding( $s );
1113                 }
1114                 return "'" . $this->strencode( $s ) . "'";
1115         }
1116
1117         public function addIdentifierQuotes( $s ) {
1118                 if ( !$this->mFlags & DBO_DDLMODE ) {
1119                         $s = '"' . str_replace( '"', '""', $s ) . '"';
1120                 }
1121                 return $s;
1122         }
1123
1124         function selectRow( $table, $vars, $conds, $fname = 'DatabaseOracle::selectRow', $options = array(), $join_conds = array() ) {
1125                 global $wgContLang;
1126
1127                 if ($conds != null) {
1128                         $conds2 = array();
1129                         $conds = ( !is_array( $conds ) ) ? array( $conds ) : $conds;
1130                         foreach ( $conds as $col => $val ) {
1131                                 $col_info = $this->fieldInfoMulti( $table, $col );
1132                                 $col_type = $col_info != false ? $col_info->type() : 'CONSTANT';
1133                                 if ( $col_type == 'CLOB' ) {
1134                                         $conds2['TO_CHAR(' . $col . ')'] = $wgContLang->checkTitleEncoding( $val );
1135                                 } elseif ( $col_type == 'VARCHAR2' && !mb_check_encoding( $val ) ) {
1136                                         $conds2[$col] = $wgContLang->checkTitleEncoding( $val );
1137                                 } else {
1138                                         $conds2[$col] = $val;
1139                                 }
1140                         }
1141
1142                         return parent::selectRow( $table, $vars, $conds2, $fname, $options, $join_conds );
1143                 } else {
1144                         return parent::selectRow( $table, $vars, $conds, $fname, $options, $join_conds );
1145                 }
1146         }
1147
1148         /**
1149          * Returns an optional USE INDEX clause to go after the table, and a
1150          * string to go at the end of the query
1151          *
1152          * @private
1153          *
1154          * @param $options Array: an associative array of options to be turned into
1155          *              an SQL query, valid keys are listed in the function.
1156          * @return array
1157          */
1158         function makeSelectOptions( $options ) {
1159                 $preLimitTail = $postLimitTail = '';
1160                 $startOpts = '';
1161
1162                 $noKeyOptions = array();
1163                 foreach ( $options as $key => $option ) {
1164                         if ( is_numeric( $key ) ) {
1165                                 $noKeyOptions[$option] = true;
1166                         }
1167                 }
1168
1169                 if ( isset( $options['GROUP BY'] ) ) {
1170                         $preLimitTail .= " GROUP BY {$options['GROUP BY']}";
1171                 }
1172                 if ( isset( $options['ORDER BY'] ) ) {
1173                         $preLimitTail .= " ORDER BY {$options['ORDER BY']}";
1174                 }
1175
1176                 # if ( isset( $noKeyOptions['FOR UPDATE'] ) ) $tailOpts .= ' FOR UPDATE';
1177                 # if ( isset( $noKeyOptions['LOCK IN SHARE MODE'] ) ) $tailOpts .= ' LOCK IN SHARE MODE';
1178                 if ( isset( $noKeyOptions['DISTINCT'] ) || isset( $noKeyOptions['DISTINCTROW'] ) ) {
1179                         $startOpts .= 'DISTINCT';
1180                 }
1181
1182                 if ( isset( $options['USE INDEX'] ) && ! is_array( $options['USE INDEX'] ) ) {
1183                         $useIndex = $this->useIndexClause( $options['USE INDEX'] );
1184                 } else {
1185                         $useIndex = '';
1186                 }
1187
1188                 return array( $startOpts, $useIndex, $preLimitTail, $postLimitTail );
1189         }
1190
1191         public function delete( $table, $conds, $fname = 'DatabaseOracle::delete' ) {
1192                 global $wgContLang;
1193
1194                 if ( $wgContLang != null && $conds != null && $conds != '*' ) {
1195                         $conds2 = array();
1196                         $conds = ( !is_array( $conds ) ) ? array( $conds ) : $conds;
1197                         foreach ( $conds as $col => $val ) {
1198                                 $col_info = $this->fieldInfoMulti( $table, $col );
1199                                 $col_type = $col_info != false ? $col_info->type() : 'CONSTANT';
1200                                 if ( $col_type == 'CLOB' ) {
1201                                         $conds2['TO_CHAR(' . $col . ')'] = $wgContLang->checkTitleEncoding( $val );
1202                                 } else {
1203                                         if ( is_array( $val ) ) {
1204                                                 $conds2[$col] = $val;
1205                                                 foreach ( $conds2[$col] as &$val2 ) {
1206                                                         $val2 = $wgContLang->checkTitleEncoding( $val2 );
1207                                                 }
1208                                         } else {
1209                                                 $conds2[$col] = $wgContLang->checkTitleEncoding( $val );
1210                                         }
1211                                 }
1212                         }
1213
1214                         return parent::delete( $table, $conds2, $fname );
1215                 } else {
1216                         return parent::delete( $table, $conds, $fname );
1217                 }
1218         }
1219
1220         function update( $table, $values, $conds, $fname = 'DatabaseOracle::update', $options = array() ) {
1221                 global $wgContLang;
1222
1223                 $table = $this->tableName( $table );
1224                 $opts = $this->makeUpdateOptions( $options );
1225                 $sql = "UPDATE $opts $table SET ";
1226
1227                 $first = true;
1228                 foreach ( $values as $col => &$val ) {
1229                         $sqlSet = $this->fieldBindStatement( $table, $col, $val, true );
1230
1231                         if ( !$first ) {
1232                                 $sqlSet = ', ' . $sqlSet;
1233                         } else {
1234                                 $first = false;
1235                         }
1236                         $sql .= $sqlSet;
1237                 }
1238
1239                 if ( $conds != '*' ) {
1240                         $sql .= ' WHERE ' . $this->makeList( $conds, LIST_AND );
1241                 }
1242
1243                 if ( ( $this->mLastResult = $stmt = oci_parse( $this->mConn, $sql ) ) === false ) {
1244                         $e = oci_error( $this->mConn );
1245                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
1246                         return false;
1247                 }
1248                 foreach ( $values as $col => &$val ) {
1249                         $col_info = $this->fieldInfoMulti( $table, $col );
1250                         $col_type = $col_info != false ? $col_info->type() : 'CONSTANT';
1251
1252                         if ( $val === null ) {
1253                                 // do nothing ... null was inserted in statement creation
1254                         } elseif ( $col_type != 'BLOB' && $col_type != 'CLOB' ) {
1255                                 if ( is_object( $val ) ) {
1256                                         $val = $val->getData();
1257                                 }
1258
1259                                 if ( preg_match( '/^timestamp.*/i', $col_type ) == 1 && strtolower( $val ) == 'infinity' ) {
1260                                         $val = '31-12-2030 12:00:00.000000';
1261                                 }
1262
1263                                 $val = ( $wgContLang != null ) ? $wgContLang->checkTitleEncoding( $val ) : $val;
1264                                 if ( oci_bind_by_name( $stmt, ":$col", $val ) === false ) {
1265                                         $e = oci_error( $stmt );
1266                                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
1267                                         return false;
1268                                 }
1269                         } else {
1270                                 if ( ( $lob[$col] = oci_new_descriptor( $this->mConn, OCI_D_LOB ) ) === false ) {
1271                                         $e = oci_error( $stmt );
1272                                         throw new DBUnexpectedError( $this, "Cannot create LOB descriptor: " . $e['message'] );
1273                                 }
1274
1275                                 if ( $col_type == 'BLOB' ) {
1276                                         $lob[$col]->writeTemporary( $val );
1277                                         oci_bind_by_name( $stmt, ":$col", $lob[$col], - 1, SQLT_BLOB );
1278                                 } else {
1279                                         $lob[$col]->writeTemporary( $val );
1280                                         oci_bind_by_name( $stmt, ":$col", $lob[$col], - 1, OCI_B_CLOB );
1281                                 }
1282                         }
1283                 }
1284
1285                 wfSuppressWarnings();
1286
1287                 if ( oci_execute( $stmt, OCI_DEFAULT ) === false ) {
1288                         $e = oci_error( $stmt );
1289                         if ( !$this->ignore_DUP_VAL_ON_INDEX || $e['code'] != '1' ) {
1290                                 $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
1291                                 return false;
1292                         } else {
1293                                 $this->mAffectedRows = oci_num_rows( $stmt );
1294                         }
1295                 } else {
1296                         $this->mAffectedRows = oci_num_rows( $stmt );
1297                 }
1298
1299                 wfRestoreWarnings();
1300
1301                 if ( isset( $lob ) ) {
1302                         foreach ( $lob as $lob_v ) {
1303                                 $lob_v->free();
1304                         }
1305                 }
1306
1307                 if ( !$this->mTrxLevel ) {
1308                         oci_commit( $this->mConn );
1309                 }
1310
1311                 oci_free_statement( $stmt );
1312         }
1313
1314         function bitNot( $field ) {
1315                 // expecting bit-fields smaller than 4bytes
1316                 return 'BITNOT(' . $field . ')';
1317         }
1318
1319         function bitAnd( $fieldLeft, $fieldRight ) {
1320                 return 'BITAND(' . $fieldLeft . ', ' . $fieldRight . ')';
1321         }
1322
1323         function bitOr( $fieldLeft, $fieldRight ) {
1324                 return 'BITOR(' . $fieldLeft . ', ' . $fieldRight . ')';
1325         }
1326
1327         function setFakeMaster( $enabled = true ) { }
1328
1329         function getDBname() {
1330                 return $this->mDBname;
1331         }
1332
1333         function getServer() {
1334                 return $this->mServer;
1335         }
1336
1337         public function getSearchEngine() {
1338                 return 'SearchOracle';
1339         }
1340 } // end DatabaseOracle class