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