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                 if ( $this->mFlags & DBO_DEFAULT ) {
 247                         $this->mConn = oci_new_connect( $this->mUser, $this->mPassword, $this->mServer, $this->defaultCharset, $session_mode );
 248                 } else {
 249                         $this->mConn = oci_connect( $this->mUser, $this->mPassword, $this->mServer, $this->defaultCharset, $session_mode );
 250                 }
 251
 252                 if ( $this->mUser != $this->mDBname ) {
 253                         //change current schema in session
 254                         $this->selectDB( $this->mDBname );
 255                 }
 256
 257                 if ( !$this->mConn ) {
 258                         throw new DBConnectionError( $this, $this->lastError() );
 259                 }
 260
 261                 $this->mOpened = true;
 262
 263                 # removed putenv calls because they interfere with the system globaly
 264                 $this->doQuery( 'ALTER SESSION SET NLS_TIMESTAMP_FORMAT=\'DD-MM-YYYY HH24:MI:SS.FF6\'' );
 265                 $this->doQuery( 'ALTER SESSION SET NLS_TIMESTAMP_TZ_FORMAT=\'DD-MM-YYYY HH24:MI:SS.FF6\'' );
 266                 return $this->mConn;
 267         }
 268
 269         /**
 270          * Closes a database connection, if it is open
 271          * Returns success, true if already closed
 272          */
 273         function close() {
 274                 $this->mOpened = false;
 275                 if ( $this->mConn ) {
 276                         return oci_close( $this->mConn );
 277                 } else {
 278                         return true;
 279                 }
 280         }
 281
 282         function execFlags() {
 283                 return $this->mTrxLevel ? OCI_DEFAULT : OCI_COMMIT_ON_SUCCESS;
 284         }
 285
 286         function doQuery( $sql ) {
 287                 wfDebug( "SQL: [$sql]\n" );
 288                 if ( !mb_check_encoding( $sql ) ) {
 289                         throw new MWException( "SQL encoding is invalid\n$sql" );
 290                 }
 291
 292                 // handle some oracle specifics
 293                 // remove AS column/table/subquery namings
 294                 if( !$this->getFlag( DBO_DDLMODE ) ) {
 295                         $sql = preg_replace( '/ as /i', ' ', $sql );
 296                 }
 297
 298                 // Oracle has issues with UNION clause if the statement includes LOB fields
 299                 // So we do a UNION ALL and then filter the results array with array_unique
 300                 $union_unique = ( preg_match( '/\/\* UNION_UNIQUE \*\/ /', $sql ) != 0 );
 301                 // EXPLAIN syntax in Oracle is EXPLAIN PLAN FOR and it return nothing
 302                 // you have to select data from plan table after explain
 303                 $explain_id = date( 'dmYHis' );
 304
 305                 $sql = preg_replace( '/^EXPLAIN /', 'EXPLAIN PLAN SET STATEMENT_ID = \'' . $explain_id . '\' FOR', $sql, 1, $explain_count );
 306
 307                 wfSuppressWarnings();
 308
 309                 if ( ( $this->mLastResult = $stmt = oci_parse( $this->mConn, $sql ) ) === false ) {
 310                         $e = oci_error( $this->mConn );
 311                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 312                         return false;
 313                 }
 314
 315                 if ( !oci_execute( $stmt, $this->execFlags() ) ) {
 316                         $e = oci_error( $stmt );
 317                         if ( !$this->ignore_DUP_VAL_ON_INDEX || $e['code'] != '1' ) {
 318                                 $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 319                                 return false;
 320                         }
 321                 }
 322
 323                 wfRestoreWarnings();
 324
 325                 if ( $explain_count > 0 ) {
 326                         return $this->doQuery( 'SELECT id, cardinality "ROWS" FROM plan_table WHERE statement_id = \'' . $explain_id . '\'' );
 327                 } elseif ( oci_statement_type( $stmt ) == 'SELECT' ) {
 328                         return new ORAResult( $this, $stmt, $union_unique );
 329                 } else {
 330                         $this->mAffectedRows = oci_num_rows( $stmt );
 331                         return true;
 332                 }
 333         }
 334
 335         function queryIgnore( $sql, $fname = '' ) {
 336                 return $this->query( $sql, $fname, true );
 337         }
 338
 339         function freeResult( $res ) {
 340                 if ( $res instanceof ResultWrapper ) {
 341                         $res = $res->result;
 342                 }
 343
 344                 $res->free();
 345         }
 346
 347         function fetchObject( $res ) {
 348                 if ( $res instanceof ResultWrapper ) {
 349                         $res = $res->result;
 350                 }
 351
 352                 return $res->fetchObject();
 353         }
 354
 355         function fetchRow( $res ) {
 356                 if ( $res instanceof ResultWrapper ) {
 357                         $res = $res->result;
 358                 }
 359
 360                 return $res->fetchRow();
 361         }
 362
 363         function numRows( $res ) {
 364                 if ( $res instanceof ResultWrapper ) {
 365                         $res = $res->result;
 366                 }
 367
 368                 return $res->numRows();
 369         }
 370
 371         function numFields( $res ) {
 372                 if ( $res instanceof ResultWrapper ) {
 373                         $res = $res->result;
 374                 }
 375
 376                 return $res->numFields();
 377         }
 378
 379         function fieldName( $stmt, $n ) {
 380                 return oci_field_name( $stmt, $n );
 381         }
 382
 383         /**
 384          * This must be called after nextSequenceVal
 385          */
 386         function insertId() {
 387                 return $this->mInsertId;
 388         }
 389
 390         function dataSeek( $res, $row ) {
 391                 if ( $res instanceof ORAResult ) {
 392                         $res->seek( $row );
 393                 } else {
 394                         $res->result->seek( $row );
 395                 }
 396         }
 397
 398         function lastError() {
 399                 if ( $this->mConn === false ) {
 400                         $e = oci_error();
 401                 } else {
 402                         $e = oci_error( $this->mConn );
 403                 }
 404                 return $e['message'];
 405         }
 406
 407         function lastErrno() {
 408                 if ( $this->mConn === false ) {
 409                         $e = oci_error();
 410                 } else {
 411                         $e = oci_error( $this->mConn );
 412                 }
 413                 return $e['code'];
 414         }
 415
 416         function affectedRows() {
 417                 return $this->mAffectedRows;
 418         }
 419
 420         /**
 421          * Returns information about an index
 422          * If errors are explicitly ignored, returns NULL on failure
 423          */
 424         function indexInfo( $table, $index, $fname = 'DatabaseOracle::indexExists' ) {
 425                 return false;
 426         }
 427
 428         function indexUnique( $table, $index, $fname = 'DatabaseOracle::indexUnique' ) {
 429                 return false;
 430         }
 431
 432         function insert( $table, $a, $fname = 'DatabaseOracle::insert', $options = array() ) {
 433                 if ( !count( $a ) ) {
 434                         return true;
 435                 }
 436
 437                 if ( !is_array( $options ) ) {
 438                         $options = array( $options );
 439                 }
 440
 441                 if ( in_array( 'IGNORE', $options ) ) {
 442                         $this->ignore_DUP_VAL_ON_INDEX = true;
 443                 }
 444
 445                 if ( !is_array( reset( $a ) ) ) {
 446                         $a = array( $a );
 447                 }
 448
 449                 foreach ( $a as &$row ) {
 450                         $this->insertOneRow( $table, $row, $fname );
 451                 }
 452                 $retVal = true;
 453
 454                 if ( in_array( 'IGNORE', $options ) ) {
 455                         $this->ignore_DUP_VAL_ON_INDEX = false;
 456                 }
 457
 458                 return $retVal;
 459         }
 460
 461         private function fieldBindStatement ( $table, $col, &$val, $includeCol = false ) {
 462                 $col_info = $this->fieldInfoMulti( $table, $col );
 463                 $col_type = $col_info != false ? $col_info->type() : 'CONSTANT';
 464
 465                 $bind = '';
 466                 if ( is_numeric( $col ) ) {
 467                         $bind = $val;
 468                         $val = null;
 469                         return $bind;
 470                 } else if ( $includeCol ) {
 471                         $bind = "$col = ";
 472                 }
 473
 474                 if ( $val == '' && $val !== 0 && $col_type != 'BLOB' && $col_type != 'CLOB' ) {
 475                         $val = null;
 476                 }
 477
 478                 if ( $val === null ) {
 479                         if ( $col_info != false && $col_info->isNullable() == 0 && $col_info->defaultValue() != null ) {
 480                                 $bind .= 'DEFAULT';
 481                         } else {
 482                                 $bind .= 'NULL';
 483                         }
 484                 } else {
 485                         $bind .= ':' . $col;
 486                 }
 487
 488                 return $bind;
 489         }
 490
 491         private function insertOneRow( $table, $row, $fname ) {
 492                 global $wgContLang;
 493
 494                 $table = $this->tableName( $table );
 495                 // "INSERT INTO tables (a, b, c)"
 496                 $sql = "INSERT INTO " . $table . " (" . join( ',', array_keys( $row ) ) . ')';
 497                 $sql .= " VALUES (";
 498
 499                 // for each value, append ":key"
 500                 $first = true;
 501                 foreach ( $row as $col => &$val ) {
 502                         if ( !$first ) {
 503                                 $sql .= ', ';
 504                         } else {
 505                                 $first = false;
 506                         }
 507
 508                         $sql .= $this->fieldBindStatement( $table, $col, $val );
 509                 }
 510                 $sql .= ')';
 511
 512                 if ( ( $this->mLastResult = $stmt = oci_parse( $this->mConn, $sql ) ) === false ) {
 513                         $e = oci_error( $this->mConn );
 514                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 515                         return false;
 516                 }
 517                 foreach ( $row as $col => &$val ) {
 518                         $col_info = $this->fieldInfoMulti( $table, $col );
 519                         $col_type = $col_info != false ? $col_info->type() : 'CONSTANT';
 520
 521                         if ( $val === null ) {
 522                                 // do nothing ... null was inserted in statement creation
 523                         } elseif ( $col_type != 'BLOB' && $col_type != 'CLOB' ) {
 524                                 if ( is_object( $val ) ) {
 525                                         $val = $val->fetch();
 526                                 }
 527
 528                                 if ( preg_match( '/^timestamp.*/i', $col_type ) == 1 && strtolower( $val ) == 'infinity' ) {
 529                                         $val = '31-12-2030 12:00:00.000000';
 530                                 }
 531
 532                                 $val = ( $wgContLang != null ) ? $wgContLang->checkTitleEncoding( $val ) : $val;
 533                                 if ( oci_bind_by_name( $stmt, ":$col", $val ) === false ) {
 534                                         $e = oci_error( $stmt );
 535                                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 536                                         return false;
 537                                 }
 538                         } else {
 539                                 if ( ( $lob[$col] = oci_new_descriptor( $this->mConn, OCI_D_LOB ) ) === false ) {
 540                                         $e = oci_error( $stmt );
 541                                         throw new DBUnexpectedError( $this, "Cannot create LOB descriptor: " . $e['message'] );
 542                                 }
 543
 544                                 if ( is_object( $val ) ) {
 545                                         $val = $val->fetch();
 546                                 }
 547
 548                                 if ( $col_type == 'BLOB' ) {
 549                                         $lob[$col]->writeTemporary( $val, OCI_TEMP_BLOB );
 550                                         oci_bind_by_name( $stmt, ":$col", $lob[$col], - 1, OCI_B_BLOB );
 551                                 } else {
 552                                         $lob[$col]->writeTemporary( $val, OCI_TEMP_CLOB );
 553                                         oci_bind_by_name( $stmt, ":$col", $lob[$col], - 1, OCI_B_CLOB );
 554                                 }
 555                         }
 556                 }
 557
 558                 wfSuppressWarnings();
 559
 560                 if ( oci_execute( $stmt, OCI_DEFAULT ) === false ) {
 561                         $e = oci_error( $stmt );
 562                         if ( !$this->ignore_DUP_VAL_ON_INDEX || $e['code'] != '1' ) {
 563                                 $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 564                                 return false;
 565                         } else {
 566                                 $this->mAffectedRows = oci_num_rows( $stmt );
 567                         }
 568                 } else {
 569                         $this->mAffectedRows = oci_num_rows( $stmt );
 570                 }
 571
 572                 wfRestoreWarnings();
 573
 574                 if ( isset( $lob ) ) {
 575                         foreach ( $lob as $lob_v ) {
 576                                 $lob_v->free();
 577                         }
 578                 }
 579
 580                 if ( !$this->mTrxLevel ) {
 581                         oci_commit( $this->mConn );
 582                 }
 583
 584                 oci_free_statement( $stmt );
 585         }
 586
 587         function insertSelect( $destTable, $srcTable, $varMap, $conds, $fname = 'DatabaseOracle::insertSelect',
 588                 $insertOptions = array(), $selectOptions = array() )
 589         {
 590                 $destTable = $this->tableName( $destTable );
 591                 if ( !is_array( $selectOptions ) ) {
 592                         $selectOptions = array( $selectOptions );
 593                 }
 594                 list( $startOpts, $useIndex, $tailOpts ) = $this->makeSelectOptions( $selectOptions );
 595                 if ( is_array( $srcTable ) ) {
 596                         $srcTable =  implode( ',', array_map( array( &$this, 'tableName' ), $srcTable ) );
 597                 } else {
 598                         $srcTable = $this->tableName( $srcTable );
 599                 }
 600
 601                 if ( ( $sequenceData = $this->getSequenceData( $destTable ) ) !== false &&
 602                                 !isset( $varMap[$sequenceData['column']] ) )
 603                 {
 604                         $varMap[$sequenceData['column']] = 'GET_SEQUENCE_VALUE(\'' . $sequenceData['sequence'] . '\')';
 605                 }
 606
 607                 // count-alias subselect fields to avoid abigious definition errors
 608                 $i = 0;
 609                 foreach ( $varMap as &$val ) {
 610                         $val = $val . ' field' . ( $i++ );
 611                 }
 612
 613                 $sql = "INSERT INTO $destTable (" . implode( ',', array_keys( $varMap ) ) . ')' .
 614                         " SELECT $startOpts " . implode( ',', $varMap ) .
 615                         " FROM $srcTable $useIndex ";
 616                 if ( $conds != '*' ) {
 617                         $sql .= ' WHERE ' . $this->makeList( $conds, LIST_AND );
 618                 }
 619                 $sql .= " $tailOpts";
 620
 621                 if ( in_array( 'IGNORE', $insertOptions ) ) {
 622                         $this->ignore_DUP_VAL_ON_INDEX = true;
 623                 }
 624
 625                 $retval = $this->query( $sql, $fname );
 626
 627                 if ( in_array( 'IGNORE', $insertOptions ) ) {
 628                         $this->ignore_DUP_VAL_ON_INDEX = false;
 629                 }
 630
 631                 return $retval;
 632         }
 633
 634         function tableName( $name ) {
 635                 global $wgSharedDB, $wgSharedPrefix, $wgSharedTables;
 636                 /*
 637                 Replace reserved words with better ones
 638                 Using uppercase because that's the only way Oracle can handle
 639                 quoted tablenames
 640                 */
 641                 switch( $name ) {
 642                         case 'user':
 643                                 $name = 'MWUSER';
 644                                 break;
 645                         case 'text':
 646                                 $name = 'PAGECONTENT';
 647                                 break;
 648                 }
 649
 650                 /*
 651                         The rest of procedure is equal to generic Databse class
 652                         except for the quoting style
 653                 */
 654                 if ( $name[0] == '"' && substr( $name, - 1, 1 ) == '"' ) {
 655                         return $name;
 656                 }
 657                 if ( preg_match( '/(^|\s)(DISTINCT|JOIN|ON|AS)(\s|$)/i', $name ) !== 0 ) {
 658                         return $name;
 659                 }
 660                 $dbDetails = array_reverse( explode( '.', $name, 2 ) );
 661                 if ( isset( $dbDetails[1] ) ) {
 662                         @list( $table, $database ) = $dbDetails;
 663                 } else {
 664                         @list( $table ) = $dbDetails;
 665                 }
 666
 667                 $prefix = $this->mTablePrefix;
 668
 669                 if ( isset( $database ) ) {
 670                         $table = ( $table[0] == '`' ? $table : "`{$table}`" );
 671                 }
 672
 673                 if ( !isset( $database ) && isset( $wgSharedDB ) && $table[0] != '"'
 674                         && isset( $wgSharedTables )
 675                         && is_array( $wgSharedTables )
 676                         && in_array( $table, $wgSharedTables )
 677                 ) {
 678                         $database = $wgSharedDB;
 679                         $prefix   = isset( $wgSharedPrefix ) ? $wgSharedPrefix : $prefix;
 680                 }
 681
 682                 if ( isset( $database ) ) {
 683                         $database = ( $database[0] == '"' ? $database : "\"{$database}\"" );
 684                 }
 685                 $table = ( $table[0] == '"') ? $table : "\"{$prefix}{$table}\"" ;
 686
 687                 $tableName = ( isset( $database ) ? "{$database}.{$table}" : "{$table}" );
 688
 689                 return strtoupper( $tableName );
 690         }
 691
 692         /**
 693          * Return the next in a sequence, save the value for retrieval via insertId()
 694          */
 695         function nextSequenceValue( $seqName ) {
 696                 $res = $this->query( "SELECT $seqName.nextval FROM dual" );
 697                 $row = $this->fetchRow( $res );
 698                 $this->mInsertId = $row[0];
 699                 return $this->mInsertId;
 700         }
 701
 702         /**
 703          * Return sequence_name if table has a sequence
 704          */
 705         private function getSequenceData( $table ) {
 706                 if ( $this->sequenceData == null ) {
 707                         $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\'' );
 708
 709                         while ( ( $row = $result->fetchRow() ) !== false ) {
 710                                 $this->sequenceData[$this->tableName( $row[1] )] = array(
 711                                         'sequence' => $row[0],
 712                                         'column' => $row[2]
 713                                 );
 714                         }
 715                 }
 716
 717                 return ( isset( $this->sequenceData[$table] ) ) ? $this->sequenceData[$table] : false;
 718         }
 719
 720         /**
 721          * REPLACE query wrapper
 722          * Oracle simulates this with a DELETE followed by INSERT
 723          * $row is the row to insert, an associative array
 724          * $uniqueIndexes is an array of indexes. Each element may be either a
 725          * field name or an array of field names
 726          *
 727          * It may be more efficient to leave off unique indexes which are unlikely to collide.
 728          * However if you do this, you run the risk of encountering errors which wouldn't have
 729          * occurred in MySQL.
 730          *
 731          * @param $table String: table name
 732          * @param $uniqueIndexes Array: array of indexes. Each element may be
 733          *                       either a field name or an array of field names
 734          * @param $rows Array: rows to insert to $table
 735          * @param $fname String: function name, you can use __METHOD__ here
 736          */
 737         function replace( $table, $uniqueIndexes, $rows, $fname = 'DatabaseOracle::replace' ) {
 738                 $table = $this->tableName( $table );
 739
 740                 if ( count( $rows ) == 0 ) {
 741                         return;
 742                 }
 743
 744                 # Single row case
 745                 if ( !is_array( reset( $rows ) ) ) {
 746                         $rows = array( $rows );
 747                 }
 748
 749                 $sequenceData = $this->getSequenceData( $table );
 750
 751                 foreach ( $rows as $row ) {
 752                         # Delete rows which collide
 753                         if ( $uniqueIndexes ) {
 754                                 $condsDelete = array();
 755                                 foreach ( $uniqueIndexes as $index ) {
 756                                         $condsDelete[$index] = $row[$index];
 757                                 }
 758                                 if ( count( $condsDelete ) > 0 ) {
 759                                         $this->delete( $table, $condsDelete, $fname );
 760                                 }
 761                         }
 762
 763                         if ( $sequenceData !== false && !isset( $row[$sequenceData['column']] ) ) {
 764                                 $row[$sequenceData['column']] = $this->nextSequenceValue( $sequenceData['sequence'] );
 765                         }
 766
 767                         # Now insert the row
 768                         $this->insert( $table, $row, $fname );
 769                 }
 770         }
 771
 772         # DELETE where the condition is a join
 773         function deleteJoin( $delTable, $joinTable, $delVar, $joinVar, $conds, $fname = 'DatabaseOracle::deleteJoin' ) {
 774                 if ( !$conds ) {
 775                         throw new DBUnexpectedError( $this, 'DatabaseOracle::deleteJoin() called with empty $conds' );
 776                 }
 777
 778                 $delTable = $this->tableName( $delTable );
 779                 $joinTable = $this->tableName( $joinTable );
 780                 $sql = "DELETE FROM $delTable WHERE $delVar IN (SELECT $joinVar FROM $joinTable ";
 781                 if ( $conds != '*' ) {
 782                         $sql .= 'WHERE ' . $this->makeList( $conds, LIST_AND );
 783                 }
 784                 $sql .= ')';
 785
 786                 $this->query( $sql, $fname );
 787         }
 788
 789         # Returns the size of a text field, or -1 for "unlimited"
 790         function textFieldSize( $table, $field ) {
 791                 $fieldInfoData = $this->fieldInfo( $table, $field);
 792                 if ( $fieldInfoData->type() == 'varchar' ) {
 793                         $size = $row->size - 4;
 794                 } else {
 795                         $size = $row->size;
 796                 }
 797                 return $size;
 798         }
 799
 800         function limitResult( $sql, $limit, $offset = false ) {
 801                 if ( $offset === false ) {
 802                         $offset = 0;
 803                 }
 804                 return "SELECT * FROM ($sql) WHERE rownum >= (1 + $offset) AND rownum < (1 + $limit + $offset)";
 805         }
 806
 807         function encodeBlob( $b ) {
 808                 return new Blob( $b );
 809         }
 810
 811         function decodeBlob( $b ) {
 812                 if ( $b instanceof Blob ) {
 813                         $b = $b->fetch();
 814                 }
 815                 return $b;
 816         }
 817
 818         function unionQueries( $sqls, $all ) {
 819                 $glue = ' UNION ALL ';
 820                 return 'SELECT * ' . ( $all ? '':'/* UNION_UNIQUE */ ' ) . 'FROM (' . implode( $glue, $sqls ) . ')' ;
 821         }
 822
 823         function wasDeadlock() {
 824                 return $this->lastErrno() == 'OCI-00060';
 825         }
 826
 827         function duplicateTableStructure( $oldName, $newName, $temporary = false, $fname = 'DatabaseOracle::duplicateTableStructure' ) {
 828                 global $wgDBprefix;
 829
 830                 $temporary = $temporary ? 'TRUE' : 'FALSE';
 831
 832                 $newName = trim( strtoupper( $newName ), '"');
 833                 $oldName = trim( strtoupper( $oldName ), '"');
 834
 835                 $tabName = substr( $newName, strlen( $wgDBprefix ) );
 836                 $oldPrefix = substr( $oldName, 0, strlen( $oldName ) - strlen( $tabName ) );
 837
 838                 return $this->doQuery( 'BEGIN DUPLICATE_TABLE(\'' . $tabName . '\', \'' . $oldPrefix . '\', \'' . strtoupper( $wgDBprefix ) . '\', ' . $temporary . '); END;' );
 839         }
 840
 841         function listTables( $prefix = null, $fname = 'DatabaseOracle::listTables' ) {
 842                 $listWhere = '';
 843                 if (!empty($prefix)) {
 844                         $listWhere = ' AND table_name LIKE \''.strtoupper($prefix).'%\'';
 845                 }
 846
 847                 $result = $this->doQuery( "SELECT table_name FROM user_tables WHERE table_name NOT LIKE '%!_IDX$_' ESCAPE '!' $listWhere" );
 848
 849                 // dirty code ... i know
 850                 $endArray = array();
 851                 $endArray[] = $prefix.'MWUSER';
 852                 $endArray[] = $prefix.'PAGE';
 853                 $endArray[] = $prefix.'IMAGE';
 854                 $fixedOrderTabs = $endArray;
 855                 while (($row = $result->fetchRow()) !== false) {
 856                         if (!in_array($row['table_name'], $fixedOrderTabs))
 857                                 $endArray[] = $row['table_name'];
 858                 }
 859
 860                 return $endArray;
 861         }
 862
 863         public function dropTable( $tableName, $fName = 'DatabaseOracle::dropTable' ) {
 864                 $tableName = $this->tableName($tableName);
 865                 if( !$this->tableExists( $tableName ) ) {
 866                         return false;
 867                 }
 868
 869                 return $this->doQuery( "DROP TABLE $tableName CASCADE CONSTRAINTS PURGE" );
 870         }
 871
 872         function timestamp( $ts = 0 ) {
 873                 return wfTimestamp( TS_ORACLE, $ts );
 874         }
 875
 876         /**
 877          * Return aggregated value function call
 878          */
 879         function aggregateValue ( $valuedata, $valuename = 'value' ) {
 880                 return $valuedata;
 881         }
 882
 883         function reportQueryError( $error, $errno, $sql, $fname, $tempIgnore = false ) {
 884                 # Ignore errors during error handling to avoid infinite
 885                 # recursion
 886                 $ignore = $this->ignoreErrors( true );
 887                 ++$this->mErrorCount;
 888
 889                 if ( $ignore || $tempIgnore ) {
 890                         wfDebug( "SQL ERROR (ignored): $error\n" );
 891                         $this->ignoreErrors( $ignore );
 892                 } else {
 893                         throw new DBQueryError( $this, $error, $errno, $sql, $fname );
 894                 }
 895         }
 896
 897         /**
 898          * @return string wikitext of a link to the server software's web site
 899          */
 900         public static function getSoftwareLink() {
 901                 return '[http://www.oracle.com/ Oracle]';
 902         }
 903
 904         /**
 905          * @return string Version information from the database
 906          */
 907         function getServerVersion() {
 908                 //better version number, fallback on driver
 909                 $rset = $this->doQuery( 'SELECT version FROM product_component_version WHERE UPPER(product) LIKE \'ORACLE DATABASE%\'' );
 910                 if ( !( $row =  $rset->fetchRow() ) ) {
 911                         return oci_server_version( $this->mConn );
 912                 }
 913                 return $row['version'];
 914         }
 915
 916         /**
 917          * Query whether a given table exists (in the given schema, or the default mw one if not given)
 918          */
 919         function tableExists( $table ) {
 920                 $table = trim($this->tableName($table), '"');
 921                 $SQL = "SELECT 1 FROM user_tables WHERE table_name='$table'";
 922                 $res = $this->doQuery( $SQL );
 923                 if ( $res ) {
 924                         $count = $res->numRows();
 925                         $res->free();
 926                 } else {
 927                         $count = 0;
 928                 }
 929                 return $count;
 930         }
 931
 932         /**
 933          * Function translates mysql_fetch_field() functionality on ORACLE.
 934          * Caching is present for reducing query time.
 935          * For internal calls. Use fieldInfo for normal usage.
 936          * Returns false if the field doesn't exist
 937          *
 938          * @param $table Array
 939          * @param $field String
 940          * @return ORAField
 941          */
 942         private function fieldInfoMulti( $table, $field ) {
 943                 $field = strtoupper( $field );
 944                 if ( is_array( $table ) ) {
 945                         $table = array_map( array( &$this, 'tableName' ), $table );
 946                         $tableWhere = 'IN (';
 947                         foreach( $table as &$singleTable ) {
 948                                 $singleTable = strtoupper( trim( $singleTable, '"' ) );
 949                                 if ( isset( $this->mFieldInfoCache["$singleTable.$field"] ) ) {
 950                                         return $this->mFieldInfoCache["$singleTable.$field"];
 951                                 }
 952                                 $tableWhere .= '\'' . $singleTable . '\',';
 953                         }
 954                         $tableWhere = rtrim( $tableWhere, ',' ) . ')';
 955                 } else {
 956                         $table = strtoupper( trim( $this->tableName( $table ), '"' ) );
 957                         if ( isset( $this->mFieldInfoCache["$table.$field"] ) ) {
 958                                 return $this->mFieldInfoCache["$table.$field"];
 959                         }
 960                         $tableWhere = '= \''.$table.'\'';
 961                 }
 962
 963                 $fieldInfoStmt = oci_parse( $this->mConn, 'SELECT * FROM wiki_field_info_full WHERE table_name '.$tableWhere.' and column_name = \''.$field.'\'' );
 964                 if ( oci_execute( $fieldInfoStmt, OCI_DEFAULT ) === false ) {
 965                         $e = oci_error( $fieldInfoStmt );
 966                         $this->reportQueryError( $e['message'], $e['code'], 'fieldInfo QUERY', __METHOD__ );
 967                         return false;
 968                 }
 969                 $res = new ORAResult( $this, $fieldInfoStmt );
 970                 if ( $res->numRows() == 0 ) {
 971                         if ( is_array( $table ) ) {
 972                                 foreach( $table as &$singleTable ) {
 973                                         $this->mFieldInfoCache["$singleTable.$field"] = false;
 974                                 }
 975                         } else {
 976                                 $this->mFieldInfoCache["$table.$field"] = false;
 977                         }
 978                         $fieldInfoTemp = null;
 979                 } else {
 980                         $fieldInfoTemp = new ORAField( $res->fetchRow() );
 981                         $table = $fieldInfoTemp->tableName();
 982                         $this->mFieldInfoCache["$table.$field"] = $fieldInfoTemp;
 983                 }
 984                 $res->free();
 985                 return $fieldInfoTemp;
 986         }
 987
 988         /**
 989          * @throws DBUnexpectedError
 990          * @param  $table
 991          * @param  $field
 992          * @return ORAField
 993          */
 994         function fieldInfo( $table, $field ) {
 995                 if ( is_array( $table ) ) {
 996                         throw new DBUnexpectedError( $this, 'DatabaseOracle::fieldInfo called with table array!' );
 997                 }
 998                 return $this->fieldInfoMulti ($table, $field);
 999         }
1000
1001         function begin( $fname = '' ) {
1002                 $this->mTrxLevel = 1;
1003         }
1004
1005         function commit( $fname = '' ) {
1006                 oci_commit( $this->mConn );
1007                 $this->mTrxLevel = 0;
1008         }
1009
1010         /* Not even sure why this is used in the main codebase... */
1011         function limitResultForUpdate( $sql, $num ) {
1012                 return $sql;
1013         }
1014
1015         /* defines must comply with ^define\s*([^\s=]*)\s*=\s?'\{\$([^\}]*)\}'; */
1016         function sourceStream( $fp, $lineCallback = false, $resultCallback = false, $fname = 'DatabaseOracle::sourceStream' ) {
1017                 $cmd = '';
1018                 $done = false;
1019                 $dollarquote = false;
1020
1021                 $replacements = array();
1022
1023                 while ( ! feof( $fp ) ) {
1024                         if ( $lineCallback ) {
1025                                 call_user_func( $lineCallback );
1026                         }
1027                         $line = trim( fgets( $fp, 1024 ) );
1028                         $sl = strlen( $line ) - 1;
1029
1030                         if ( $sl < 0 ) {
1031                                 continue;
1032                         }
1033                         if ( '-' == $line { 0 } && '-' == $line { 1 } ) {
1034                                 continue;
1035                         }
1036
1037                         // Allow dollar quoting for function declarations
1038                         if ( substr( $line, 0, 8 ) == '/*$mw$*/' ) {
1039                                 if ( $dollarquote ) {
1040                                         $dollarquote = false;
1041                                         $line = str_replace( '/*$mw$*/', '', $line ); // remove dollarquotes
1042                                         $done = true;
1043                                 } else {
1044                                         $dollarquote = true;
1045                                 }
1046                         } elseif ( !$dollarquote ) {
1047                                 if ( ';' == $line { $sl } && ( $sl < 2 || ';' != $line { $sl - 1 } ) ) {
1048                                         $done = true;
1049                                         $line = substr( $line, 0, $sl );
1050                                 }
1051                         }
1052
1053                         if ( $cmd != '' ) {
1054                                 $cmd .= ' ';
1055                         }
1056                         $cmd .= "$line\n";
1057
1058                         if ( $done ) {
1059                                 $cmd = str_replace( ';;', ";", $cmd );
1060                                 if ( strtolower( substr( $cmd, 0, 6 ) ) == 'define' ) {
1061                                         if ( preg_match( '/^define\s*([^\s=]*)\s*=\s*\'\{\$([^\}]*)\}\'/', $cmd, $defines ) ) {
1062                                                 $replacements[$defines[2]] = $defines[1];
1063                                         }
1064                                 } else {
1065                                         foreach ( $replacements as $mwVar => $scVar ) {
1066                                                 $cmd = str_replace( '&' . $scVar . '.', '`{$' . $mwVar . '}`', $cmd );
1067                                         }
1068
1069                                         $cmd = $this->replaceVars( $cmd );
1070                                         $res = $this->doQuery( $cmd );
1071                                         if ( $resultCallback ) {
1072                                                 call_user_func( $resultCallback, $res, $this );
1073                                         }
1074
1075                                         if ( false === $res ) {
1076                                                 $err = $this->lastError();
1077                                                 return "Query \"{$cmd}\" failed with error code \"$err\".\n";
1078                                         }
1079                                 }
1080
1081                                 $cmd = '';
1082                                 $done = false;
1083                         }
1084                 }
1085                 return true;
1086         }
1087
1088         function selectDB( $db ) {
1089                 $this->mDBname = $db;
1090                 if ( $db == null || $db == $this->mUser ) {
1091                         return true;
1092                 }
1093                 $sql = 'ALTER SESSION SET CURRENT_SCHEMA=' . strtoupper($db);
1094                 $stmt = oci_parse( $this->mConn, $sql );
1095                 wfSuppressWarnings();
1096                 $success = oci_execute( $stmt );
1097                 wfRestoreWarnings();
1098                 if ( !$success ) {
1099                         $e = oci_error( $stmt );
1100                         if ( $e['code'] != '1435' ) {
1101                                 $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
1102                         }
1103                         return false;
1104                 }
1105                 return true;
1106         }
1107
1108         function strencode( $s ) {
1109                 return str_replace( "'", "''", $s );
1110         }
1111
1112         function addQuotes( $s ) {
1113                 global $wgContLang;
1114                 if ( isset( $wgContLang->mLoaded ) && $wgContLang->mLoaded ) {
1115                         $s = $wgContLang->checkTitleEncoding( $s );
1116                 }
1117                 return "'" . $this->strencode( $s ) . "'";
1118         }
1119
1120         public function addIdentifierQuotes( $s ) {
1121                 if ( !$this->mFlags & DBO_DDLMODE ) {
1122                         $s = '"' . str_replace( '"', '""', $s ) . '"';
1123                 }
1124                 return $s;
1125         }
1126
1127         function selectRow( $table, $vars, $conds, $fname = 'DatabaseOracle::selectRow', $options = array(), $join_conds = array() ) {
1128                 global $wgContLang;
1129
1130                 if ($conds != null) {
1131                         $conds2 = array();
1132                         $conds = ( !is_array( $conds ) ) ? array( $conds ) : $conds;
1133                         foreach ( $conds as $col => $val ) {
1134                                 $col_info = $this->fieldInfoMulti( $table, $col );
1135                                 $col_type = $col_info != false ? $col_info->type() : 'CONSTANT';
1136                                 if ( $col_type == 'CLOB' ) {
1137                                         $conds2['TO_CHAR(' . $col . ')'] = $wgContLang->checkTitleEncoding( $val );
1138                                 } elseif ( $col_type == 'VARCHAR2' && !mb_check_encoding( $val ) ) {
1139                                         $conds2[$col] = $wgContLang->checkTitleEncoding( $val );
1140                                 } else {
1141                                         $conds2[$col] = $val;
1142                                 }
1143                         }
1144
1145                         return parent::selectRow( $table, $vars, $conds2, $fname, $options, $join_conds );
1146                 } else {
1147                         return parent::selectRow( $table, $vars, $conds, $fname, $options, $join_conds );
1148                 }
1149         }
1150
1151         /**
1152          * Returns an optional USE INDEX clause to go after the table, and a
1153          * string to go at the end of the query
1154          *
1155          * @private
1156          *
1157          * @param $options Array: an associative array of options to be turned into
1158          *              an SQL query, valid keys are listed in the function.
1159          * @return array
1160          */
1161         function makeSelectOptions( $options ) {
1162                 $preLimitTail = $postLimitTail = '';
1163                 $startOpts = '';
1164
1165                 $noKeyOptions = array();
1166                 foreach ( $options as $key => $option ) {
1167                         if ( is_numeric( $key ) ) {
1168                                 $noKeyOptions[$option] = true;
1169                         }
1170                 }
1171
1172                 if ( isset( $options['GROUP BY'] ) ) {
1173                         $preLimitTail .= " GROUP BY {$options['GROUP BY']}";
1174                 }
1175                 if ( isset( $options['ORDER BY'] ) ) {
1176                         $preLimitTail .= " ORDER BY {$options['ORDER BY']}";
1177                 }
1178
1179                 # if ( isset( $noKeyOptions['FOR UPDATE'] ) ) $tailOpts .= ' FOR UPDATE';
1180                 # if ( isset( $noKeyOptions['LOCK IN SHARE MODE'] ) ) $tailOpts .= ' LOCK IN SHARE MODE';
1181                 if ( isset( $noKeyOptions['DISTINCT'] ) || isset( $noKeyOptions['DISTINCTROW'] ) ) {
1182                         $startOpts .= 'DISTINCT';
1183                 }
1184
1185                 if ( isset( $options['USE INDEX'] ) && ! is_array( $options['USE INDEX'] ) ) {
1186                         $useIndex = $this->useIndexClause( $options['USE INDEX'] );
1187                 } else {
1188                         $useIndex = '';
1189                 }
1190
1191                 return array( $startOpts, $useIndex, $preLimitTail, $postLimitTail );
1192         }
1193
1194         public function delete( $table, $conds, $fname = 'DatabaseOracle::delete' ) {
1195                 global $wgContLang;
1196
1197                 if ( $wgContLang != null && $conds != null && $conds != '*' ) {
1198                         $conds2 = array();
1199                         $conds = ( !is_array( $conds ) ) ? array( $conds ) : $conds;
1200                         foreach ( $conds as $col => $val ) {
1201                                 $col_info = $this->fieldInfoMulti( $table, $col );
1202                                 $col_type = $col_info != false ? $col_info->type() : 'CONSTANT';
1203                                 if ( $col_type == 'CLOB' ) {
1204                                         $conds2['TO_CHAR(' . $col . ')'] = $wgContLang->checkTitleEncoding( $val );
1205                                 } else {
1206                                         if ( is_array( $val ) ) {
1207                                                 $conds2[$col] = $val;
1208                                                 foreach ( $conds2[$col] as &$val2 ) {
1209                                                         $val2 = $wgContLang->checkTitleEncoding( $val2 );
1210                                                 }
1211                                         } else {
1212                                                 $conds2[$col] = $wgContLang->checkTitleEncoding( $val );
1213                                         }
1214                                 }
1215                         }
1216
1217                         return parent::delete( $table, $conds2, $fname );
1218                 } else {
1219                         return parent::delete( $table, $conds, $fname );
1220                 }
1221         }
1222
1223         function update( $table, $values, $conds, $fname = 'DatabaseOracle::update', $options = array() ) {
1224                 global $wgContLang;
1225
1226                 $table = $this->tableName( $table );
1227                 $opts = $this->makeUpdateOptions( $options );
1228                 $sql = "UPDATE $opts $table SET ";
1229
1230                 $first = true;
1231                 foreach ( $values as $col => &$val ) {
1232                         $sqlSet = $this->fieldBindStatement( $table, $col, $val, true );
1233
1234                         if ( !$first ) {
1235                                 $sqlSet = ', ' . $sqlSet;
1236                         } else {
1237                                 $first = false;
1238                         }
1239                         $sql .= $sqlSet;
1240                 }
1241
1242                 if ( $conds != '*' ) {
1243                         $sql .= ' WHERE ' . $this->makeList( $conds, LIST_AND );
1244                 }
1245
1246                 if ( ( $this->mLastResult = $stmt = oci_parse( $this->mConn, $sql ) ) === false ) {
1247                         $e = oci_error( $this->mConn );
1248                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
1249                         return false;
1250                 }
1251                 foreach ( $values as $col => &$val ) {
1252                         $col_info = $this->fieldInfoMulti( $table, $col );
1253                         $col_type = $col_info != false ? $col_info->type() : 'CONSTANT';
1254
1255                         if ( $val === null ) {
1256                                 // do nothing ... null was inserted in statement creation
1257                         } elseif ( $col_type != 'BLOB' && $col_type != 'CLOB' ) {
1258                                 if ( is_object( $val ) ) {
1259                                         $val = $val->getData();
1260                                 }
1261
1262                                 if ( preg_match( '/^timestamp.*/i', $col_type ) == 1 && strtolower( $val ) == 'infinity' ) {
1263                                         $val = '31-12-2030 12:00:00.000000';
1264                                 }
1265
1266                                 $val = ( $wgContLang != null ) ? $wgContLang->checkTitleEncoding( $val ) : $val;
1267                                 if ( oci_bind_by_name( $stmt, ":$col", $val ) === false ) {
1268                                         $e = oci_error( $stmt );
1269                                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
1270                                         return false;
1271                                 }
1272                         } else {
1273                                 if ( ( $lob[$col] = oci_new_descriptor( $this->mConn, OCI_D_LOB ) ) === false ) {
1274                                         $e = oci_error( $stmt );
1275                                         throw new DBUnexpectedError( $this, "Cannot create LOB descriptor: " . $e['message'] );
1276                                 }
1277
1278                                 if ( $col_type == 'BLOB' ) {
1279                                         $lob[$col]->writeTemporary( $val );
1280                                         oci_bind_by_name( $stmt, ":$col", $lob[$col], - 1, SQLT_BLOB );
1281                                 } else {
1282                                         $lob[$col]->writeTemporary( $val );
1283                                         oci_bind_by_name( $stmt, ":$col", $lob[$col], - 1, OCI_B_CLOB );
1284                                 }
1285                         }
1286                 }
1287
1288                 wfSuppressWarnings();
1289
1290                 if ( oci_execute( $stmt, OCI_DEFAULT ) === false ) {
1291                         $e = oci_error( $stmt );
1292                         if ( !$this->ignore_DUP_VAL_ON_INDEX || $e['code'] != '1' ) {
1293                                 $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
1294                                 return false;
1295                         } else {
1296                                 $this->mAffectedRows = oci_num_rows( $stmt );
1297                         }
1298                 } else {
1299                         $this->mAffectedRows = oci_num_rows( $stmt );
1300                 }
1301
1302                 wfRestoreWarnings();
1303
1304                 if ( isset( $lob ) ) {
1305                         foreach ( $lob as $lob_v ) {
1306                                 $lob_v->free();
1307                         }
1308                 }
1309
1310                 if ( !$this->mTrxLevel ) {
1311                         oci_commit( $this->mConn );
1312                 }
1313
1314                 oci_free_statement( $stmt );
1315         }
1316
1317         function bitNot( $field ) {
1318                 // expecting bit-fields smaller than 4bytes
1319                 return 'BITNOT(' . $field . ')';
1320         }
1321
1322         function bitAnd( $fieldLeft, $fieldRight ) {
1323                 return 'BITAND(' . $fieldLeft . ', ' . $fieldRight . ')';
1324         }
1325
1326         function bitOr( $fieldLeft, $fieldRight ) {
1327                 return 'BITOR(' . $fieldLeft . ', ' . $fieldRight . ')';
1328         }
1329
1330         function setFakeMaster( $enabled = true ) { }
1331
1332         function getDBname() {
1333                 return $this->mDBname;
1334         }
1335
1336         function getServer() {
1337                 return $this->mServer;
1338         }
1339
1340         public function getSearchEngine() {
1341                 return 'SearchOracle';
1342         }
1343 } // end DatabaseOracle class