includes/db/DatabaseOracle.php

   1 <?php
   2 /**
   3  * This is the Oracle database abstraction layer.
   4  *
   5  * @file
   6  * @ingroup Database
   7  */
   8
   9 /**
  10  * The oci8 extension is fairly weak and doesn't support oci_num_rows, among
  11  * other things.  We use a wrapper class to handle that and other
  12  * Oracle-specific bits, like converting column names back to lowercase.
  13  * @ingroup Database
  14  */
  15 class ORAResult {
  16         private $rows;
  17         private $cursor;
  18         private $nrows;
  19
  20         private $columns = array();
  21
  22         private function array_unique_md( $array_in ) {
  23                 $array_out = array();
  24                 $array_hashes = array();
  25
  26                 foreach ( $array_in as $item ) {
  27                         $hash = md5( serialize( $item ) );
  28                         if ( !isset( $array_hashes[$hash] ) ) {
  29                                 $array_hashes[$hash] = $hash;
  30                                 $array_out[] = $item;
  31                         }
  32                 }
  33
  34                 return $array_out;
  35         }
  36
  37         /**
  38          * @param $db DatabaseBase
  39          * @param $stmt
  40          * @param bool $unique
  41          */
  42         function __construct( &$db, $stmt, $unique = false ) {
  43                 $this->db =& $db;
  44
  45                 if ( ( $this->nrows = oci_fetch_all( $stmt, $this->rows, 0, - 1, OCI_FETCHSTATEMENT_BY_ROW | OCI_NUM ) ) === false ) {
  46                         $e = oci_error( $stmt );
  47                         $db->reportQueryError( $e['message'], $e['code'], '', __METHOD__ );
  48                         $this->free();
  49                         return;
  50                 }
  51
  52                 if ( $unique ) {
  53                         $this->rows = $this->array_unique_md( $this->rows );
  54                         $this->nrows = count( $this->rows );
  55                 }
  56
  57                 if ($this->nrows > 0) {
  58                         foreach ( $this->rows[0] as $k => $v ) {
  59                                 $this->columns[$k] = strtolower( oci_field_name( $stmt, $k + 1 ) );
  60                         }
  61                 }
  62
  63                 $this->cursor = 0;
  64                 oci_free_statement( $stmt );
  65         }
  66
  67         public function free() {
  68                 unset($this->db);
  69         }
  70
  71         public function seek( $row ) {
  72                 $this->cursor = min( $row, $this->nrows );
  73         }
  74
  75         public function numRows() {
  76                 return $this->nrows;
  77         }
  78
  79         public function numFields() {
  80                 return count($this->columns);
  81         }
  82
  83         public function fetchObject() {
  84                 if ( $this->cursor >= $this->nrows ) {
  85                         return false;
  86                 }
  87                 $row = $this->rows[$this->cursor++];
  88                 $ret = new stdClass();
  89                 foreach ( $row as $k => $v ) {
  90                         $lc = $this->columns[$k];
  91                         $ret->$lc = $v;
  92                 }
  93
  94                 return $ret;
  95         }
  96
  97         public function fetchRow() {
  98                 if ( $this->cursor >= $this->nrows ) {
  99                         return false;
 100                 }
 101
 102                 $row = $this->rows[$this->cursor++];
 103                 $ret = array();
 104                 foreach ( $row as $k => $v ) {
 105                         $lc = $this->columns[$k];
 106                         $ret[$lc] = $v;
 107                         $ret[$k] = $v;
 108                 }
 109                 return $ret;
 110         }
 111 }
 112
 113 /**
 114  * Utility class.
 115  * @ingroup Database
 116  */
 117 class ORAField implements Field {
 118         private $name, $tablename, $default, $max_length, $nullable,
 119                 $is_pk, $is_unique, $is_multiple, $is_key, $type;
 120
 121         function __construct( $info ) {
 122                 $this->name = $info['column_name'];
 123                 $this->tablename = $info['table_name'];
 124                 $this->default = $info['data_default'];
 125                 $this->max_length = $info['data_length'];
 126                 $this->nullable = $info['not_null'];
 127                 $this->is_pk = isset( $info['prim'] ) && $info['prim'] == 1 ? 1 : 0;
 128                 $this->is_unique = isset( $info['uniq'] ) && $info['uniq'] == 1 ? 1 : 0;
 129                 $this->is_multiple = isset( $info['nonuniq'] ) && $info['nonuniq'] == 1 ? 1 : 0;
 130                 $this->is_key = ( $this->is_pk || $this->is_unique || $this->is_multiple );
 131                 $this->type = $info['data_type'];
 132         }
 133
 134         function name() {
 135                 return $this->name;
 136         }
 137
 138         function tableName() {
 139                 return $this->tablename;
 140         }
 141
 142         function defaultValue() {
 143                 return $this->default;
 144         }
 145
 146         function maxLength() {
 147                 return $this->max_length;
 148         }
 149
 150         function isNullable() {
 151                 return $this->nullable;
 152         }
 153
 154         function isKey() {
 155                 return $this->is_key;
 156         }
 157
 158         function isMultipleKey() {
 159                 return $this->is_multiple;
 160         }
 161
 162         function type() {
 163                 return $this->type;
 164         }
 165 }
 166
 167 /**
 168  * @ingroup Database
 169  */
 170 class DatabaseOracle extends DatabaseBase {
 171         var $mInsertId = null;
 172         var $mLastResult = null;
 173         var $lastResult = null;
 174         var $cursor = 0;
 175         var $mAffectedRows;
 176
 177         var $ignore_DUP_VAL_ON_INDEX = false;
 178         var $sequenceData = null;
 179
 180         var $defaultCharset = 'AL32UTF8';
 181
 182         var $mFieldInfoCache = array();
 183
 184         function __construct( $server = false, $user = false, $password = false, $dbName = false,
 185                 $flags = 0, $tablePrefix = 'get from global' )
 186         {
 187                 global $wgDBprefix;
 188                 $tablePrefix = $tablePrefix == 'get from global' ? strtoupper( $wgDBprefix ) : strtoupper( $tablePrefix );
 189                 parent::__construct( $server, $user, $password, $dbName, $flags, $tablePrefix );
 190                 wfRunHooks( 'DatabaseOraclePostInit', array( $this ) );
 191         }
 192
 193         function __destruct() {
 194                 if ($this->mOpened) {
 195                         wfSuppressWarnings();
 196                         $this->close();
 197                         wfRestoreWarnings();
 198                 }
 199         }
 200
 201         function getType() {
 202                 return 'oracle';
 203         }
 204
 205         function cascadingDeletes() {
 206                 return true;
 207         }
 208         function cleanupTriggers() {
 209                 return true;
 210         }
 211         function strictIPs() {
 212                 return true;
 213         }
 214         function realTimestamps() {
 215                 return true;
 216         }
 217         function implicitGroupby() {
 218                 return false;
 219         }
 220         function implicitOrderby() {
 221                 return false;
 222         }
 223         function searchableIPs() {
 224                 return true;
 225         }
 226
 227         /**
 228          * Usually aborts on failure
 229          */
 230         function open( $server, $user, $password, $dbName ) {
 231                 if ( !function_exists( 'oci_connect' ) ) {
 232                         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" );
 233                 }
 234
 235                 $this->close();
 236                 $this->mUser = $user;
 237                 $this->mPassword = $password;
 238                 // changed internal variables functions
 239                 // mServer now holds the TNS endpoint
 240                 // mDBname is schema name if different from username
 241                 if ( !$server ) {
 242                         // backward compatibillity (server used to be null and TNS was supplied in dbname)
 243                         $this->mServer = $dbName;
 244                         $this->mDBname = $user;
 245                 } else {
 246                         $this->mServer = $server;
 247                         if ( !$dbName ) {
 248                                 $this->mDBname = $user;
 249                         } else {
 250                                 $this->mDBname = $dbName;
 251                         }
 252                 }
 253
 254                 if ( !strlen( $user ) ) { # e.g. the class is being loaded
 255                         return;
 256                 }
 257
 258                 $session_mode = $this->mFlags & DBO_SYSDBA ? OCI_SYSDBA : OCI_DEFAULT;
 259                 wfSuppressWarnings();
 260                 if ( $this->mFlags & DBO_DEFAULT ) {
 261                         $this->mConn = oci_new_connect( $this->mUser, $this->mPassword, $this->mServer, $this->defaultCharset, $session_mode );
 262                 } else {
 263                         $this->mConn = oci_connect( $this->mUser, $this->mPassword, $this->mServer, $this->defaultCharset, $session_mode );
 264                 }
 265                 wfRestoreWarnings();
 266
 267                 if ( $this->mUser != $this->mDBname ) {
 268                         //change current schema in session
 269                         $this->selectDB( $this->mDBname );
 270                 }
 271
 272                 if ( !$this->mConn ) {
 273                         throw new DBConnectionError( $this, $this->lastError() );
 274                 }
 275
 276                 $this->mOpened = true;
 277
 278                 # removed putenv calls because they interfere with the system globaly
 279                 $this->doQuery( 'ALTER SESSION SET NLS_TIMESTAMP_FORMAT=\'DD-MM-YYYY HH24:MI:SS.FF6\'' );
 280                 $this->doQuery( 'ALTER SESSION SET NLS_TIMESTAMP_TZ_FORMAT=\'DD-MM-YYYY HH24:MI:SS.FF6\'' );
 281                 return $this->mConn;
 282         }
 283
 284         /**
 285          * Closes a database connection, if it is open
 286          * Returns success, true if already closed
 287          */
 288         function close() {
 289                 $this->mOpened = false;
 290                 if ( $this->mConn ) {
 291                         if ( $this->mTrxLevel ) {
 292                                 $this->commit();
 293                         }
 294                         return oci_close( $this->mConn );
 295                 } else {
 296                         return true;
 297                 }
 298         }
 299
 300         function execFlags() {
 301                 return $this->mTrxLevel ? OCI_DEFAULT : OCI_COMMIT_ON_SUCCESS;
 302         }
 303
 304         function doQuery( $sql ) {
 305                 wfDebug( "SQL: [$sql]\n" );
 306                 if ( !mb_check_encoding( $sql ) ) {
 307                         throw new MWException( "SQL encoding is invalid\n$sql" );
 308                 }
 309
 310                 // handle some oracle specifics
 311                 // remove AS column/table/subquery namings
 312                 if( !$this->getFlag( DBO_DDLMODE ) ) {
 313                         $sql = preg_replace( '/ as /i', ' ', $sql );
 314                 }
 315
 316                 // Oracle has issues with UNION clause if the statement includes LOB fields
 317                 // So we do a UNION ALL and then filter the results array with array_unique
 318                 $union_unique = ( preg_match( '/\/\* UNION_UNIQUE \*\/ /', $sql ) != 0 );
 319                 // EXPLAIN syntax in Oracle is EXPLAIN PLAN FOR and it return nothing
 320                 // you have to select data from plan table after explain
 321                 $explain_id = date( 'dmYHis' );
 322
 323                 $sql = preg_replace( '/^EXPLAIN /', 'EXPLAIN PLAN SET STATEMENT_ID = \'' . $explain_id . '\' FOR', $sql, 1, $explain_count );
 324
 325                 wfSuppressWarnings();
 326
 327                 if ( ( $this->mLastResult = $stmt = oci_parse( $this->mConn, $sql ) ) === false ) {
 328                         $e = oci_error( $this->mConn );
 329                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 330                         return false;
 331                 }
 332
 333                 if ( !oci_execute( $stmt, $this->execFlags() ) ) {
 334                         $e = oci_error( $stmt );
 335                         if ( !$this->ignore_DUP_VAL_ON_INDEX || $e['code'] != '1' ) {
 336                                 $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 337                                 return false;
 338                         }
 339                 }
 340
 341                 wfRestoreWarnings();
 342
 343                 if ( $explain_count > 0 ) {
 344                         return $this->doQuery( 'SELECT id, cardinality "ROWS" FROM plan_table WHERE statement_id = \'' . $explain_id . '\'' );
 345                 } elseif ( oci_statement_type( $stmt ) == 'SELECT' ) {
 346                         return new ORAResult( $this, $stmt, $union_unique );
 347                 } else {
 348                         $this->mAffectedRows = oci_num_rows( $stmt );
 349                         return true;
 350                 }
 351         }
 352
 353         function queryIgnore( $sql, $fname = '' ) {
 354                 return $this->query( $sql, $fname, true );
 355         }
 356
 357         function freeResult( $res ) {
 358                 if ( $res instanceof ResultWrapper ) {
 359                         $res = $res->result;
 360                 }
 361
 362                 $res->free();
 363         }
 364
 365         function fetchObject( $res ) {
 366                 if ( $res instanceof ResultWrapper ) {
 367                         $res = $res->result;
 368                 }
 369
 370                 return $res->fetchObject();
 371         }
 372
 373         function fetchRow( $res ) {
 374                 if ( $res instanceof ResultWrapper ) {
 375                         $res = $res->result;
 376                 }
 377
 378                 return $res->fetchRow();
 379         }
 380
 381         function numRows( $res ) {
 382                 if ( $res instanceof ResultWrapper ) {
 383                         $res = $res->result;
 384                 }
 385
 386                 return $res->numRows();
 387         }
 388
 389         function numFields( $res ) {
 390                 if ( $res instanceof ResultWrapper ) {
 391                         $res = $res->result;
 392                 }
 393
 394                 return $res->numFields();
 395         }
 396
 397         function fieldName( $stmt, $n ) {
 398                 return oci_field_name( $stmt, $n );
 399         }
 400
 401         /**
 402          * This must be called after nextSequenceVal
 403          */
 404         function insertId() {
 405                 return $this->mInsertId;
 406         }
 407
 408         function dataSeek( $res, $row ) {
 409                 if ( $res instanceof ORAResult ) {
 410                         $res->seek( $row );
 411                 } else {
 412                         $res->result->seek( $row );
 413                 }
 414         }
 415
 416         function lastError() {
 417                 if ( $this->mConn === false ) {
 418                         $e = oci_error();
 419                 } else {
 420                         $e = oci_error( $this->mConn );
 421                 }
 422                 return $e['message'];
 423         }
 424
 425         function lastErrno() {
 426                 if ( $this->mConn === false ) {
 427                         $e = oci_error();
 428                 } else {
 429                         $e = oci_error( $this->mConn );
 430                 }
 431                 return $e['code'];
 432         }
 433
 434         function affectedRows() {
 435                 return $this->mAffectedRows;
 436         }
 437
 438         /**
 439          * Returns information about an index
 440          * If errors are explicitly ignored, returns NULL on failure
 441          */
 442         function indexInfo( $table, $index, $fname = 'DatabaseOracle::indexExists' ) {
 443                 return false;
 444         }
 445
 446         function indexUnique( $table, $index, $fname = 'DatabaseOracle::indexUnique' ) {
 447                 return false;
 448         }
 449
 450         function insert( $table, $a, $fname = 'DatabaseOracle::insert', $options = array() ) {
 451                 if ( !count( $a ) ) {
 452                         return true;
 453                 }
 454
 455                 if ( !is_array( $options ) ) {
 456                         $options = array( $options );
 457                 }
 458
 459                 if ( in_array( 'IGNORE', $options ) ) {
 460                         $this->ignore_DUP_VAL_ON_INDEX = true;
 461                 }
 462
 463                 if ( !is_array( reset( $a ) ) ) {
 464                         $a = array( $a );
 465                 }
 466
 467                 foreach ( $a as &$row ) {
 468                         $this->insertOneRow( $table, $row, $fname );
 469                 }
 470                 $retVal = true;
 471
 472                 if ( in_array( 'IGNORE', $options ) ) {
 473                         $this->ignore_DUP_VAL_ON_INDEX = false;
 474                 }
 475
 476                 return $retVal;
 477         }
 478
 479         private function fieldBindStatement ( $table, $col, &$val, $includeCol = false ) {
 480                 $col_info = $this->fieldInfoMulti( $table, $col );
 481                 $col_type = $col_info != false ? $col_info->type() : 'CONSTANT';
 482
 483                 $bind = '';
 484                 if ( is_numeric( $col ) ) {
 485                         $bind = $val;
 486                         $val = null;
 487                         return $bind;
 488                 } else if ( $includeCol ) {
 489                         $bind = "$col = ";
 490                 }
 491
 492                 if ( $val == '' && $val !== 0 && $col_type != 'BLOB' && $col_type != 'CLOB' ) {
 493                         $val = null;
 494                 }
 495
 496                 if ( $val === null ) {
 497                         if ( $col_info != false && $col_info->isNullable() == 0 && $col_info->defaultValue() != null ) {
 498                                 $bind .= 'DEFAULT';
 499                         } else {
 500                                 $bind .= 'NULL';
 501                         }
 502                 } else {
 503                         $bind .= ':' . $col;
 504                 }
 505
 506                 return $bind;
 507         }
 508
 509         private function insertOneRow( $table, $row, $fname ) {
 510                 global $wgContLang;
 511
 512                 $table = $this->tableName( $table );
 513                 // "INSERT INTO tables (a, b, c)"
 514                 $sql = "INSERT INTO " . $table . " (" . join( ',', array_keys( $row ) ) . ')';
 515                 $sql .= " VALUES (";
 516
 517                 // for each value, append ":key"
 518                 $first = true;
 519                 foreach ( $row as $col => &$val ) {
 520                         if ( !$first ) {
 521                                 $sql .= ', ';
 522                         } else {
 523                                 $first = false;
 524                         }
 525
 526                         $sql .= $this->fieldBindStatement( $table, $col, $val );
 527                 }
 528                 $sql .= ')';
 529
 530                 if ( ( $this->mLastResult = $stmt = oci_parse( $this->mConn, $sql ) ) === false ) {
 531                         $e = oci_error( $this->mConn );
 532                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 533                         return false;
 534                 }
 535                 foreach ( $row as $col => &$val ) {
 536                         $col_info = $this->fieldInfoMulti( $table, $col );
 537                         $col_type = $col_info != false ? $col_info->type() : 'CONSTANT';
 538
 539                         if ( $val === null ) {
 540                                 // do nothing ... null was inserted in statement creation
 541                         } elseif ( $col_type != 'BLOB' && $col_type != 'CLOB' ) {
 542                                 if ( is_object( $val ) ) {
 543                                         $val = $val->fetch();
 544                                 }
 545
 546                                 if ( preg_match( '/^timestamp.*/i', $col_type ) == 1 && strtolower( $val ) == 'infinity' ) {
 547                                         $val = '31-12-2030 12:00:00.000000';
 548                                 }
 549
 550                                 $val = ( $wgContLang != null ) ? $wgContLang->checkTitleEncoding( $val ) : $val;
 551                                 if ( oci_bind_by_name( $stmt, ":$col", $val ) === false ) {
 552                                         $e = oci_error( $stmt );
 553                                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 554                                         return false;
 555                                 }
 556                         } else {
 557                                 if ( ( $lob[$col] = oci_new_descriptor( $this->mConn, OCI_D_LOB ) ) === false ) {
 558                                         $e = oci_error( $stmt );
 559                                         throw new DBUnexpectedError( $this, "Cannot create LOB descriptor: " . $e['message'] );
 560                                 }
 561
 562                                 if ( is_object( $val ) ) {
 563                                         $val = $val->fetch();
 564                                 }
 565
 566                                 if ( $col_type == 'BLOB' ) {
 567                                         $lob[$col]->writeTemporary( $val, OCI_TEMP_BLOB );
 568                                         oci_bind_by_name( $stmt, ":$col", $lob[$col], - 1, OCI_B_BLOB );
 569                                 } else {
 570                                         $lob[$col]->writeTemporary( $val, OCI_TEMP_CLOB );
 571                                         oci_bind_by_name( $stmt, ":$col", $lob[$col], - 1, OCI_B_CLOB );
 572                                 }
 573                         }
 574                 }
 575
 576                 wfSuppressWarnings();
 577
 578                 if ( oci_execute( $stmt, $this->execFlags() ) === false ) {
 579                         $e = oci_error( $stmt );
 580                         if ( !$this->ignore_DUP_VAL_ON_INDEX || $e['code'] != '1' ) {
 581                                 $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 582                                 return false;
 583                         } else {
 584                                 $this->mAffectedRows = oci_num_rows( $stmt );
 585                         }
 586                 } else {
 587                         $this->mAffectedRows = oci_num_rows( $stmt );
 588                 }
 589
 590                 wfRestoreWarnings();
 591
 592                 if ( isset( $lob ) ) {
 593                         foreach ( $lob as $lob_v ) {
 594                                 $lob_v->free();
 595                         }
 596                 }
 597
 598                 if ( !$this->mTrxLevel ) {
 599                         oci_commit( $this->mConn );
 600                 }
 601
 602                 oci_free_statement( $stmt );
 603         }
 604
 605         function insertSelect( $destTable, $srcTable, $varMap, $conds, $fname = 'DatabaseOracle::insertSelect',
 606                 $insertOptions = array(), $selectOptions = array() )
 607         {
 608                 $destTable = $this->tableName( $destTable );
 609                 if ( !is_array( $selectOptions ) ) {
 610                         $selectOptions = array( $selectOptions );
 611                 }
 612                 list( $startOpts, $useIndex, $tailOpts ) = $this->makeSelectOptions( $selectOptions );
 613                 if ( is_array( $srcTable ) ) {
 614                         $srcTable =  implode( ',', array_map( array( &$this, 'tableName' ), $srcTable ) );
 615                 } else {
 616                         $srcTable = $this->tableName( $srcTable );
 617                 }
 618
 619                 if ( ( $sequenceData = $this->getSequenceData( $destTable ) ) !== false &&
 620                                 !isset( $varMap[$sequenceData['column']] ) )
 621                 {
 622                         $varMap[$sequenceData['column']] = 'GET_SEQUENCE_VALUE(\'' . $sequenceData['sequence'] . '\')';
 623                 }
 624
 625                 // count-alias subselect fields to avoid abigious definition errors
 626                 $i = 0;
 627                 foreach ( $varMap as &$val ) {
 628                         $val = $val . ' field' . ( $i++ );
 629                 }
 630
 631                 $sql = "INSERT INTO $destTable (" . implode( ',', array_keys( $varMap ) ) . ')' .
 632                         " SELECT $startOpts " . implode( ',', $varMap ) .
 633                         " FROM $srcTable $useIndex ";
 634                 if ( $conds != '*' ) {
 635                         $sql .= ' WHERE ' . $this->makeList( $conds, LIST_AND );
 636                 }
 637                 $sql .= " $tailOpts";
 638
 639                 if ( in_array( 'IGNORE', $insertOptions ) ) {
 640                         $this->ignore_DUP_VAL_ON_INDEX = true;
 641                 }
 642
 643                 $retval = $this->query( $sql, $fname );
 644
 645                 if ( in_array( 'IGNORE', $insertOptions ) ) {
 646                         $this->ignore_DUP_VAL_ON_INDEX = false;
 647                 }
 648
 649                 return $retval;
 650         }
 651
 652         function tableName( $name, $quoted = true ) {
 653                 /*
 654                 Replace reserved words with better ones
 655                 Using uppercase because that's the only way Oracle can handle
 656                 quoted tablenames
 657                 */
 658                 switch( $name ) {
 659                         case 'user':
 660                                 $name = 'MWUSER';
 661                                 break;
 662                         case 'text':
 663                                 $name = 'PAGECONTENT';
 664                                 break;
 665                 }
 666
 667                 return parent::tableName( strtoupper( $name ), $quoted );
 668         }
 669
 670         function tableNameInternal( $name ) {
 671                 $name = $this->tableName( $name );
 672                 return preg_replace( '/.*\.(.*)/', '$1', $name);
 673         }
 674         /**
 675          * Return the next in a sequence, save the value for retrieval via insertId()
 676          */
 677         function nextSequenceValue( $seqName ) {
 678                 $res = $this->query( "SELECT $seqName.nextval FROM dual" );
 679                 $row = $this->fetchRow( $res );
 680                 $this->mInsertId = $row[0];
 681                 return $this->mInsertId;
 682         }
 683
 684         /**
 685          * Return sequence_name if table has a sequence
 686          */
 687         private function getSequenceData( $table ) {
 688                 if ( $this->sequenceData == null ) {
 689                         $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\'' );
 690
 691                         while ( ( $row = $result->fetchRow() ) !== false ) {
 692                                 $this->sequenceData[$this->tableName( $row[1] )] = array(
 693                                         'sequence' => $row[0],
 694                                         'column' => $row[2]
 695                                 );
 696                         }
 697                 }
 698
 699                 return ( isset( $this->sequenceData[$table] ) ) ? $this->sequenceData[$table] : false;
 700         }
 701
 702         /**
 703          * REPLACE query wrapper
 704          * Oracle simulates this with a DELETE followed by INSERT
 705          * $row is the row to insert, an associative array
 706          * $uniqueIndexes is an array of indexes. Each element may be either a
 707          * field name or an array of field names
 708          *
 709          * It may be more efficient to leave off unique indexes which are unlikely to collide.
 710          * However if you do this, you run the risk of encountering errors which wouldn't have
 711          * occurred in MySQL.
 712          *
 713          * @param $table String: table name
 714          * @param $uniqueIndexes Array: array of indexes. Each element may be
 715          *                       either a field name or an array of field names
 716          * @param $rows Array: rows to insert to $table
 717          * @param $fname String: function name, you can use __METHOD__ here
 718          */
 719         function replace( $table, $uniqueIndexes, $rows, $fname = 'DatabaseOracle::replace' ) {
 720                 $table = $this->tableName( $table );
 721
 722                 if ( count( $rows ) == 0 ) {
 723                         return;
 724                 }
 725
 726                 # Single row case
 727                 if ( !is_array( reset( $rows ) ) ) {
 728                         $rows = array( $rows );
 729                 }
 730
 731                 $sequenceData = $this->getSequenceData( $table );
 732
 733                 foreach ( $rows as $row ) {
 734                         # Delete rows which collide
 735                         if ( $uniqueIndexes ) {
 736                                 $deleteConds = array();
 737                                 foreach ( $uniqueIndexes as $key=>$index ) {
 738                                         if ( is_array( $index ) ) {
 739                                                 $deleteConds2 = array();
 740                                                 foreach ( $index as $col ) {
 741                                                         $deleteConds2[$col] = $row[$col];
 742                                                 }
 743                                                 $deleteConds[$key] = $this->makeList( $deleteConds2, LIST_AND );
 744                                         } else {
 745                                                 $deleteConds[$index] = $row[$index];
 746                                         }
 747                                 }
 748                                 $deleteConds = array( $this->makeList( $deleteConds, LIST_OR ) );
 749                                 $this->delete( $table, $deleteConds, $fname );
 750                         }
 751
 752
 753                         if ( $sequenceData !== false && !isset( $row[$sequenceData['column']] ) ) {
 754                                 $row[$sequenceData['column']] = $this->nextSequenceValue( $sequenceData['sequence'] );
 755                         }
 756
 757                         # Now insert the row
 758                         $this->insert( $table, $row, $fname );
 759                 }
 760         }
 761
 762         # DELETE where the condition is a join
 763         function deleteJoin( $delTable, $joinTable, $delVar, $joinVar, $conds, $fname = 'DatabaseOracle::deleteJoin' ) {
 764                 if ( !$conds ) {
 765                         throw new DBUnexpectedError( $this, 'DatabaseOracle::deleteJoin() called with empty $conds' );
 766                 }
 767
 768                 $delTable = $this->tableName( $delTable );
 769                 $joinTable = $this->tableName( $joinTable );
 770                 $sql = "DELETE FROM $delTable WHERE $delVar IN (SELECT $joinVar FROM $joinTable ";
 771                 if ( $conds != '*' ) {
 772                         $sql .= 'WHERE ' . $this->makeList( $conds, LIST_AND );
 773                 }
 774                 $sql .= ')';
 775
 776                 $this->query( $sql, $fname );
 777         }
 778
 779         # Returns the size of a text field, or -1 for "unlimited"
 780         function textFieldSize( $table, $field ) {
 781                 $fieldInfoData = $this->fieldInfo( $table, $field );
 782                 return $fieldInfoData->maxLength();
 783         }
 784
 785         function limitResult( $sql, $limit, $offset = false ) {
 786                 if ( $offset === false ) {
 787                         $offset = 0;
 788                 }
 789                 return "SELECT * FROM ($sql) WHERE rownum >= (1 + $offset) AND rownum < (1 + $limit + $offset)";
 790         }
 791
 792         function encodeBlob( $b ) {
 793                 return new Blob( $b );
 794         }
 795
 796         function decodeBlob( $b ) {
 797                 if ( $b instanceof Blob ) {
 798                         $b = $b->fetch();
 799                 }
 800                 return $b;
 801         }
 802
 803         function unionQueries( $sqls, $all ) {
 804                 $glue = ' UNION ALL ';
 805                 return 'SELECT * ' . ( $all ? '':'/* UNION_UNIQUE */ ' ) . 'FROM (' . implode( $glue, $sqls ) . ')' ;
 806         }
 807
 808         function wasDeadlock() {
 809                 return $this->lastErrno() == 'OCI-00060';
 810         }
 811
 812         function duplicateTableStructure( $oldName, $newName, $temporary = false, $fname = 'DatabaseOracle::duplicateTableStructure' ) {
 813                 global $wgDBprefix;
 814                 $this->setFlag( DBO_DDLMODE );
 815
 816                 $temporary = $temporary ? 'TRUE' : 'FALSE';
 817
 818                 $newName = strtoupper( $newName );
 819                 $oldName = strtoupper( $oldName );
 820
 821                 $tabName = substr( $newName, strlen( $wgDBprefix ) );
 822                 $oldPrefix = substr( $oldName, 0, strlen( $oldName ) - strlen( $tabName ) );
 823                 $newPrefix = strtoupper( $wgDBprefix );
 824
 825                 $this->clearFlag( DBO_DDLMODE );
 826                 return $this->doQuery( "BEGIN DUPLICATE_TABLE( '$tabName', '$oldPrefix', '$newPrefix', $temporary ); END;" );
 827         }
 828
 829         function listTables( $prefix = null, $fname = 'DatabaseOracle::listTables' ) {
 830                 $listWhere = '';
 831                 if (!empty($prefix)) {
 832                         $listWhere = ' AND table_name LIKE \''.strtoupper($prefix).'%\'';
 833                 }
 834
 835                 $owner = strtoupper( $this->mDBname );
 836                 $result = $this->doQuery( "SELECT table_name FROM all_tables WHERE owner='$owner' AND table_name NOT LIKE '%!_IDX\$_' ESCAPE '!' $listWhere" );
 837
 838                 // dirty code ... i know
 839                 $endArray = array();
 840                 $endArray[] = $prefix.'MWUSER';
 841                 $endArray[] = $prefix.'PAGE';
 842                 $endArray[] = $prefix.'IMAGE';
 843                 $fixedOrderTabs = $endArray;
 844                 while (($row = $result->fetchRow()) !== false) {
 845                         if (!in_array($row['table_name'], $fixedOrderTabs))
 846                                 $endArray[] = $row['table_name'];
 847                 }
 848
 849                 return $endArray;
 850         }
 851
 852         public function dropTable( $tableName, $fName = 'DatabaseOracle::dropTable' ) {
 853                 $tableName = $this->tableName($tableName);
 854                 if( !$this->tableExists( $tableName ) ) {
 855                         return false;
 856                 }
 857
 858                 return $this->doQuery( "DROP TABLE $tableName CASCADE CONSTRAINTS PURGE" );
 859         }
 860
 861         function timestamp( $ts = 0 ) {
 862                 return wfTimestamp( TS_ORACLE, $ts );
 863         }
 864
 865         /**
 866          * Return aggregated value function call
 867          */
 868         function aggregateValue ( $valuedata, $valuename = 'value' ) {
 869                 return $valuedata;
 870         }
 871
 872         function reportQueryError( $error, $errno, $sql, $fname, $tempIgnore = false ) {
 873                 # Ignore errors during error handling to avoid infinite
 874                 # recursion
 875                 $ignore = $this->ignoreErrors( true );
 876                 ++$this->mErrorCount;
 877
 878                 if ( $ignore || $tempIgnore ) {
 879                         wfDebug( "SQL ERROR (ignored): $error\n" );
 880                         $this->ignoreErrors( $ignore );
 881                 } else {
 882                         throw new DBQueryError( $this, $error, $errno, $sql, $fname );
 883                 }
 884         }
 885
 886         /**
 887          * @return string wikitext of a link to the server software's web site
 888          */
 889         public static function getSoftwareLink() {
 890                 return '[http://www.oracle.com/ Oracle]';
 891         }
 892
 893         /**
 894          * @return string Version information from the database
 895          */
 896         function getServerVersion() {
 897                 //better version number, fallback on driver
 898                 $rset = $this->doQuery( 'SELECT version FROM product_component_version WHERE UPPER(product) LIKE \'ORACLE DATABASE%\'' );
 899                 if ( !( $row =  $rset->fetchRow() ) ) {
 900                         return oci_server_version( $this->mConn );
 901                 }
 902                 return $row['version'];
 903         }
 904
 905         /**
 906          * Query whether a given index exists
 907          */
 908         function indexExists( $table, $index, $fname = 'DatabaseOracle::indexExists' ) {
 909                 $table = $this->tableName( $table );
 910                 $table = strtoupper( $this->removeIdentifierQuotes( $table ) );
 911                 $index = strtoupper( $index );
 912                 $owner = strtoupper( $this->mDBname );
 913                 $SQL = "SELECT 1 FROM all_indexes WHERE owner='$owner' AND index_name='{$table}_{$index}'";
 914                 $res = $this->doQuery( $SQL );
 915                 if ( $res ) {
 916                         $count = $res->numRows();
 917                         $res->free();
 918                 } else {
 919                         $count = 0;
 920                 }
 921                 return $count != 0;
 922         }
 923
 924         /**
 925          * Query whether a given table exists (in the given schema, or the default mw one if not given)
 926          */
 927         function tableExists( $table ) {
 928                 $table = $this->tableName( $table );
 929                 $table = strtoupper( $this->removeIdentifierQuotes( $table ) );
 930                 $owner = strtoupper( $this->mDBname );
 931                 $SQL = "SELECT 1 FROM all_tables WHERE owner='$owner' AND table_name='$table'";
 932                 $res = $this->doQuery( $SQL );
 933                 if ( $res ) {
 934                         $count = $res->numRows();
 935                         $res->free();
 936                 } else {
 937                         $count = 0;
 938                 }
 939                 return $count != 0;
 940         }
 941
 942         /**
 943          * Function translates mysql_fetch_field() functionality on ORACLE.
 944          * Caching is present for reducing query time.
 945          * For internal calls. Use fieldInfo for normal usage.
 946          * Returns false if the field doesn't exist
 947          *
 948          * @param $table Array
 949          * @param $field String
 950          * @return ORAField|ORAResult
 951          */
 952         private function fieldInfoMulti( $table, $field ) {
 953                 $field = strtoupper( $field );
 954                 if ( is_array( $table ) ) {
 955                         $table = array_map( array( &$this, 'tableNameInternal' ), $table );
 956                         $tableWhere = 'IN (';
 957                         foreach( $table as &$singleTable ) {
 958                                 $singleTable = $this->removeIdentifierQuotes($singleTable);
 959                                 if ( isset( $this->mFieldInfoCache["$singleTable.$field"] ) ) {
 960                                         return $this->mFieldInfoCache["$singleTable.$field"];
 961                                 }
 962                                 $tableWhere .= '\'' . $singleTable . '\',';
 963                         }
 964                         $tableWhere = rtrim( $tableWhere, ',' ) . ')';
 965                 } else {
 966                         $table = $this->removeIdentifierQuotes(  $this->tableNameInternal( $table ) );
 967                         if ( isset( $this->mFieldInfoCache["$table.$field"] ) ) {
 968                                 return $this->mFieldInfoCache["$table.$field"];
 969                         }
 970                         $tableWhere = '= \''.$table.'\'';
 971                 }
 972
 973                 $fieldInfoStmt = oci_parse( $this->mConn, 'SELECT * FROM wiki_field_info_full WHERE table_name '.$tableWhere.' and column_name = \''.$field.'\'' );
 974                 if ( oci_execute( $fieldInfoStmt, $this->execFlags() ) === false ) {
 975                         $e = oci_error( $fieldInfoStmt );
 976                         $this->reportQueryError( $e['message'], $e['code'], 'fieldInfo QUERY', __METHOD__ );
 977                         return false;
 978                 }
 979                 $res = new ORAResult( $this, $fieldInfoStmt );
 980                 if ( $res->numRows() == 0 ) {
 981                         if ( is_array( $table ) ) {
 982                                 foreach( $table as &$singleTable ) {
 983                                         $this->mFieldInfoCache["$singleTable.$field"] = false;
 984                                 }
 985                         } else {
 986                                 $this->mFieldInfoCache["$table.$field"] = false;
 987                         }
 988                         $fieldInfoTemp = null;
 989                 } else {
 990                         $fieldInfoTemp = new ORAField( $res->fetchRow() );
 991                         $table = $fieldInfoTemp->tableName();
 992                         $this->mFieldInfoCache["$table.$field"] = $fieldInfoTemp;
 993                 }
 994                 $res->free();
 995                 return $fieldInfoTemp;
 996         }
 997
 998         /**
 999          * @throws DBUnexpectedError
1000          * @param  $table
1001          * @param  $field
1002          * @return ORAField
1003          */
1004         function fieldInfo( $table, $field ) {
1005                 if ( is_array( $table ) ) {
1006                         throw new DBUnexpectedError( $this, 'DatabaseOracle::fieldInfo called with table array!' );
1007                 }
1008                 return $this->fieldInfoMulti ($table, $field);
1009         }
1010
1011         function begin( $fname = 'DatabaseOracle::begin' ) {
1012                 $this->mTrxLevel = 1;
1013         }
1014
1015         function commit( $fname = 'DatabaseOracle::commit' ) {
1016                 if ( $this->mTrxLevel ) {
1017                         oci_commit( $this->mConn );
1018                         $this->mTrxLevel = 0;
1019                 }
1020         }
1021
1022         function rollback( $fname = 'DatabaseOracle::rollback' ) {
1023                 if ( $this->mTrxLevel ) {
1024                         oci_rollback( $this->mConn );
1025                         $this->mTrxLevel = 0;
1026                 }
1027         }
1028
1029         /* Not even sure why this is used in the main codebase... */
1030         function limitResultForUpdate( $sql, $num ) {
1031                 return $sql;
1032         }
1033
1034         /* defines must comply with ^define\s*([^\s=]*)\s*=\s?'\{\$([^\}]*)\}'; */
1035         function sourceStream( $fp, $lineCallback = false, $resultCallback = false, $fname = 'DatabaseOracle::sourceStream' ) {
1036                 $cmd = '';
1037                 $done = false;
1038                 $dollarquote = false;
1039
1040                 $replacements = array();
1041
1042                 while ( ! feof( $fp ) ) {
1043                         if ( $lineCallback ) {
1044                                 call_user_func( $lineCallback );
1045                         }
1046                         $line = trim( fgets( $fp, 1024 ) );
1047                         $sl = strlen( $line ) - 1;
1048
1049                         if ( $sl < 0 ) {
1050                                 continue;
1051                         }
1052                         if ( '-' == $line { 0 } && '-' == $line { 1 } ) {
1053                                 continue;
1054                         }
1055
1056                         // Allow dollar quoting for function declarations
1057                         if ( substr( $line, 0, 8 ) == '/*$mw$*/' ) {
1058                                 if ( $dollarquote ) {
1059                                         $dollarquote = false;
1060                                         $line = str_replace( '/*$mw$*/', '', $line ); // remove dollarquotes
1061                                         $done = true;
1062                                 } else {
1063                                         $dollarquote = true;
1064                                 }
1065                         } elseif ( !$dollarquote ) {
1066                                 if ( ';' == $line { $sl } && ( $sl < 2 || ';' != $line { $sl - 1 } ) ) {
1067                                         $done = true;
1068                                         $line = substr( $line, 0, $sl );
1069                                 }
1070                         }
1071
1072                         if ( $cmd != '' ) {
1073                                 $cmd .= ' ';
1074                         }
1075                         $cmd .= "$line\n";
1076
1077                         if ( $done ) {
1078                                 $cmd = str_replace( ';;', ";", $cmd );
1079                                 if ( strtolower( substr( $cmd, 0, 6 ) ) == 'define' ) {
1080                                         if ( preg_match( '/^define\s*([^\s=]*)\s*=\s*\'\{\$([^\}]*)\}\'/', $cmd, $defines ) ) {
1081                                                 $replacements[$defines[2]] = $defines[1];
1082                                         }
1083                                 } else {
1084                                         foreach ( $replacements as $mwVar => $scVar ) {
1085                                                 $cmd = str_replace( '&' . $scVar . '.', '`{$' . $mwVar . '}`', $cmd );
1086                                         }
1087
1088                                         $cmd = $this->replaceVars( $cmd );
1089                                         $res = $this->doQuery( $cmd );
1090                                         if ( $resultCallback ) {
1091                                                 call_user_func( $resultCallback, $res, $this );
1092                                         }
1093
1094                                         if ( false === $res ) {
1095                                                 $err = $this->lastError();
1096                                                 return "Query \"{$cmd}\" failed with error code \"$err\".\n";
1097                                         }
1098                                 }
1099
1100                                 $cmd = '';
1101                                 $done = false;
1102                         }
1103                 }
1104                 return true;
1105         }
1106
1107         function selectDB( $db ) {
1108                 $this->mDBname = $db;
1109                 if ( $db == null || $db == $this->mUser ) {
1110                         return true;
1111                 }
1112                 $sql = 'ALTER SESSION SET CURRENT_SCHEMA=' . strtoupper($db);
1113                 $stmt = oci_parse( $this->mConn, $sql );
1114                 wfSuppressWarnings();
1115                 $success = oci_execute( $stmt );
1116                 wfRestoreWarnings();
1117                 if ( !$success ) {
1118                         $e = oci_error( $stmt );
1119                         if ( $e['code'] != '1435' ) {
1120                                 $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
1121                         }
1122                         return false;
1123                 }
1124                 return true;
1125         }
1126
1127         function strencode( $s ) {
1128                 return str_replace( "'", "''", $s );
1129         }
1130
1131         function addQuotes( $s ) {
1132                 global $wgContLang;
1133                 if ( isset( $wgContLang->mLoaded ) && $wgContLang->mLoaded ) {
1134                         $s = $wgContLang->checkTitleEncoding( $s );
1135                 }
1136                 return "'" . $this->strencode( $s ) . "'";
1137         }
1138
1139         public function addIdentifierQuotes( $s ) {
1140                 if ( !$this->getFlag( DBO_DDLMODE ) ) {
1141                         $s = '/*Q*/' . $s;
1142                 }
1143                 return $s;
1144         }
1145
1146         public function removeIdentifierQuotes( $s ) {
1147                 return strpos($s, '/*Q*/') === FALSE ? $s : substr($s, 5);
1148         }
1149
1150         public function isQuotedIdentifier( $s ) {
1151                 return strpos($s, '/*Q*/') !== FALSE;
1152         }
1153
1154         private function wrapFieldForWhere( $table, &$col, &$val ) {
1155                 global $wgContLang;
1156
1157                 $col_info = $this->fieldInfoMulti( $table, $col );
1158                 $col_type = $col_info != false ? $col_info->type() : 'CONSTANT';
1159                 if ( $col_type == 'CLOB' ) {
1160                         $col = 'TO_CHAR(' . $col . ')';
1161                         $val = $wgContLang->checkTitleEncoding( $val );
1162                 } elseif ( $col_type == 'VARCHAR2' && !mb_check_encoding( $val ) ) {
1163                         $val = $wgContLang->checkTitleEncoding( $val );
1164                 }
1165         }
1166
1167         private function wrapConditionsForWhere ( $table, $conds, $parentCol = null ) {
1168                 $conds2 = array();
1169                 foreach ( $conds as $col => $val ) {
1170                         if ( is_array( $val ) ) {
1171                                 $conds2[$col] = $this->wrapConditionsForWhere ( $table, $val, $col );
1172                         } else {
1173                                 if ( is_numeric( $col ) && $parentCol != null ) {
1174                                         $this->wrapFieldForWhere ( $table, $parentCol, $val );
1175                                 } else {
1176                                         $this->wrapFieldForWhere ( $table, $col, $val );
1177                                 }
1178                                 $conds2[$col] = $val;
1179                         }
1180                 }
1181                 return $conds2;
1182         }
1183
1184         function selectRow( $table, $vars, $conds, $fname = 'DatabaseOracle::selectRow', $options = array(), $join_conds = array() ) {
1185                 if ( is_array($conds) ) {
1186                         $conds = $this->wrapConditionsForWhere( $table, $conds );
1187                 }
1188                 return parent::selectRow( $table, $vars, $conds, $fname, $options, $join_conds );
1189         }
1190
1191         /**
1192          * Returns an optional USE INDEX clause to go after the table, and a
1193          * string to go at the end of the query
1194          *
1195          * @private
1196          *
1197          * @param $options Array: an associative array of options to be turned into
1198          *              an SQL query, valid keys are listed in the function.
1199          * @return array
1200          */
1201         function makeSelectOptions( $options ) {
1202                 $preLimitTail = $postLimitTail = '';
1203                 $startOpts = '';
1204
1205                 $noKeyOptions = array();
1206                 foreach ( $options as $key => $option ) {
1207                         if ( is_numeric( $key ) ) {
1208                                 $noKeyOptions[$option] = true;
1209                         }
1210                 }
1211
1212                 if ( isset( $options['GROUP BY'] ) ) {
1213                         $preLimitTail .= " GROUP BY {$options['GROUP BY']}";
1214                 }
1215                 if ( isset( $options['ORDER BY'] ) ) {
1216                         $preLimitTail .= " ORDER BY {$options['ORDER BY']}";
1217                 }
1218
1219                 # if ( isset( $noKeyOptions['FOR UPDATE'] ) ) $tailOpts .= ' FOR UPDATE';
1220                 # if ( isset( $noKeyOptions['LOCK IN SHARE MODE'] ) ) $tailOpts .= ' LOCK IN SHARE MODE';
1221                 if ( isset( $noKeyOptions['DISTINCT'] ) || isset( $noKeyOptions['DISTINCTROW'] ) ) {
1222                         $startOpts .= 'DISTINCT';
1223                 }
1224
1225                 if ( isset( $options['USE INDEX'] ) && ! is_array( $options['USE INDEX'] ) ) {
1226                         $useIndex = $this->useIndexClause( $options['USE INDEX'] );
1227                 } else {
1228                         $useIndex = '';
1229                 }
1230
1231                 return array( $startOpts, $useIndex, $preLimitTail, $postLimitTail );
1232         }
1233
1234         public function delete( $table, $conds, $fname = 'DatabaseOracle::delete' ) {
1235                 if ( is_array($conds) ) {
1236                         $conds = $this->wrapConditionsForWhere( $table, $conds );
1237                 }
1238                 return parent::delete( $table, $conds, $fname );
1239         }
1240
1241         function update( $table, $values, $conds, $fname = 'DatabaseOracle::update', $options = array() ) {
1242                 global $wgContLang;
1243
1244                 $table = $this->tableName( $table );
1245                 $opts = $this->makeUpdateOptions( $options );
1246                 $sql = "UPDATE $opts $table SET ";
1247
1248                 $first = true;
1249                 foreach ( $values as $col => &$val ) {
1250                         $sqlSet = $this->fieldBindStatement( $table, $col, $val, true );
1251
1252                         if ( !$first ) {
1253                                 $sqlSet = ', ' . $sqlSet;
1254                         } else {
1255                                 $first = false;
1256                         }
1257                         $sql .= $sqlSet;
1258                 }
1259
1260                 if ( $conds != '*' ) {
1261                         $conds = $this->wrapConditionsForWhere( $table, $conds );
1262                         $sql .= ' WHERE ' . $this->makeList( $conds, LIST_AND );
1263                 }
1264
1265                 if ( ( $this->mLastResult = $stmt = oci_parse( $this->mConn, $sql ) ) === false ) {
1266                         $e = oci_error( $this->mConn );
1267                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
1268                         return false;
1269                 }
1270                 foreach ( $values as $col => &$val ) {
1271                         $col_info = $this->fieldInfoMulti( $table, $col );
1272                         $col_type = $col_info != false ? $col_info->type() : 'CONSTANT';
1273
1274                         if ( $val === null ) {
1275                                 // do nothing ... null was inserted in statement creation
1276                         } elseif ( $col_type != 'BLOB' && $col_type != 'CLOB' ) {
1277                                 if ( is_object( $val ) ) {
1278                                         $val = $val->getData();
1279                                 }
1280
1281                                 if ( preg_match( '/^timestamp.*/i', $col_type ) == 1 && strtolower( $val ) == 'infinity' ) {
1282                                         $val = '31-12-2030 12:00:00.000000';
1283                                 }
1284
1285                                 $val = ( $wgContLang != null ) ? $wgContLang->checkTitleEncoding( $val ) : $val;
1286                                 if ( oci_bind_by_name( $stmt, ":$col", $val ) === false ) {
1287                                         $e = oci_error( $stmt );
1288                                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
1289                                         return false;
1290                                 }
1291                         } else {
1292                                 if ( ( $lob[$col] = oci_new_descriptor( $this->mConn, OCI_D_LOB ) ) === false ) {
1293                                         $e = oci_error( $stmt );
1294                                         throw new DBUnexpectedError( $this, "Cannot create LOB descriptor: " . $e['message'] );
1295                                 }
1296
1297                                 if ( $col_type == 'BLOB' ) {
1298                                         $lob[$col]->writeTemporary( $val );
1299                                         oci_bind_by_name( $stmt, ":$col", $lob[$col], - 1, SQLT_BLOB );
1300                                 } else {
1301                                         $lob[$col]->writeTemporary( $val );
1302                                         oci_bind_by_name( $stmt, ":$col", $lob[$col], - 1, OCI_B_CLOB );
1303                                 }
1304                         }
1305                 }
1306
1307                 wfSuppressWarnings();
1308
1309                 if ( oci_execute( $stmt, $this->execFlags() ) === false ) {
1310                         $e = oci_error( $stmt );
1311                         if ( !$this->ignore_DUP_VAL_ON_INDEX || $e['code'] != '1' ) {
1312                                 $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
1313                                 return false;
1314                         } else {
1315                                 $this->mAffectedRows = oci_num_rows( $stmt );
1316                         }
1317                 } else {
1318                         $this->mAffectedRows = oci_num_rows( $stmt );
1319                 }
1320
1321                 wfRestoreWarnings();
1322
1323                 if ( isset( $lob ) ) {
1324                         foreach ( $lob as $lob_v ) {
1325                                 $lob_v->free();
1326                         }
1327                 }
1328
1329                 if ( !$this->mTrxLevel ) {
1330                         oci_commit( $this->mConn );
1331                 }
1332
1333                 oci_free_statement( $stmt );
1334         }
1335
1336         function bitNot( $field ) {
1337                 // expecting bit-fields smaller than 4bytes
1338                 return 'BITNOT(' . $field . ')';
1339         }
1340
1341         function bitAnd( $fieldLeft, $fieldRight ) {
1342                 return 'BITAND(' . $fieldLeft . ', ' . $fieldRight . ')';
1343         }
1344
1345         function bitOr( $fieldLeft, $fieldRight ) {
1346                 return 'BITOR(' . $fieldLeft . ', ' . $fieldRight . ')';
1347         }
1348
1349         function setFakeMaster( $enabled = true ) { }
1350
1351         function getDBname() {
1352                 return $this->mDBname;
1353         }
1354
1355         function getServer() {
1356                 return $this->mServer;
1357         }
1358
1359         public function getSearchEngine() {
1360                 return 'SearchOracle';
1361         }
1362 } // end DatabaseOracle class