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  * @ingroup Database
  11  */
  12 class ORABlob {
  13         var $mData;
  14
  15         function __construct( $data ) {
  16                 $this->mData = $data;
  17         }
  18
  19         function getData() {
  20                 return $this->mData;
  21         }
  22 }
  23
  24 /**
  25  * The oci8 extension is fairly weak and doesn't support oci_num_rows, among
  26  * other things.  We use a wrapper class to handle that and other
  27  * Oracle-specific bits, like converting column names back to lowercase.
  28  * @ingroup Database
  29  */
  30 class ORAResult {
  31         private $rows;
  32         private $cursor;
  33         private $stmt;
  34         private $nrows;
  35
  36         private function array_unique_md( $array_in ) {
  37                 $array_out = array();
  38                 $array_hashes = array();
  39
  40                 foreach ( $array_in as $item ) {
  41                         $hash = md5( serialize( $item ) );
  42                         if ( !isset( $array_hashes[$hash] ) ) {
  43                                 $array_hashes[$hash] = $hash;
  44                                 $array_out[] = $item;
  45                         }
  46                 }
  47
  48                 return $array_out;
  49         }
  50
  51         function __construct( &$db, $stmt, $unique = false ) {
  52                 $this->db =& $db;
  53
  54                 if ( ( $this->nrows = oci_fetch_all( $stmt, $this->rows, 0, - 1, OCI_FETCHSTATEMENT_BY_ROW | OCI_NUM ) ) === false ) {
  55                         $e = oci_error( $stmt );
  56                         $db->reportQueryError( $e['message'], $e['code'], '', __METHOD__ );
  57                         $this->free();
  58                         return;
  59                 }
  60
  61                 if ( $unique ) {
  62                         $this->rows = $this->array_unique_md( $this->rows );
  63                         $this->nrows = count( $this->rows );
  64                 }
  65
  66                 $this->cursor = 0;
  67                 $this->stmt = $stmt;
  68         }
  69
  70         public function free() {
  71                 oci_free_statement( $this->stmt );
  72         }
  73
  74         public function seek( $row ) {
  75                 $this->cursor = min( $row, $this->nrows );
  76         }
  77
  78         public function numRows() {
  79                 return $this->nrows;
  80         }
  81
  82         public function numFields() {
  83                 return oci_num_fields( $this->stmt );
  84         }
  85
  86         public function fetchObject() {
  87                 if ( $this->cursor >= $this->nrows ) {
  88                         return false;
  89                 }
  90                 $row = $this->rows[$this->cursor++];
  91                 $ret = new stdClass();
  92                 foreach ( $row as $k => $v ) {
  93                         $lc = strtolower( oci_field_name( $this->stmt, $k + 1 ) );
  94                         $ret->$lc = $v;
  95                 }
  96
  97                 return $ret;
  98         }
  99
 100         public function fetchRow() {
 101                 if ( $this->cursor >= $this->nrows ) {
 102                         return false;
 103                 }
 104
 105                 $row = $this->rows[$this->cursor++];
 106                 $ret = array();
 107                 foreach ( $row as $k => $v ) {
 108                         $lc = strtolower( oci_field_name( $this->stmt, $k + 1 ) );
 109                         $ret[$lc] = $v;
 110                         $ret[$k] = $v;
 111                 }
 112                 return $ret;
 113         }
 114 }
 115
 116 /**
 117  * Utility class.
 118  * @ingroup Database
 119  */
 120 class ORAField {
 121         private $name, $tablename, $default, $max_length, $nullable,
 122                 $is_pk, $is_unique, $is_multiple, $is_key, $type;
 123
 124         function __construct( $info ) {
 125                 $this->name = $info['column_name'];
 126                 $this->tablename = $info['table_name'];
 127                 $this->default = $info['data_default'];
 128                 $this->max_length = $info['data_length'];
 129                 $this->nullable = $info['not_null'];
 130                 $this->is_pk = isset( $info['prim'] ) && $info['prim'] == 1 ? 1 : 0;
 131                 $this->is_unique = isset( $info['uniq'] ) && $info['uniq'] == 1 ? 1 : 0;
 132                 $this->is_multiple = isset( $info['nonuniq'] ) && $info['nonuniq'] == 1 ? 1 : 0;
 133                 $this->is_key = ( $this->is_pk || $this->is_unique || $this->is_multiple );
 134                 $this->type = $info['data_type'];
 135         }
 136
 137         function name() {
 138                 return $this->name;
 139         }
 140
 141         function tableName() {
 142                 return $this->tablename;
 143         }
 144
 145         function defaultValue() {
 146                 return $this->default;
 147         }
 148
 149         function maxLength() {
 150                 return $this->max_length;
 151         }
 152
 153         function nullable() {
 154                 return $this->nullable;
 155         }
 156
 157         function isKey() {
 158                 return $this->is_key;
 159         }
 160
 161         function isMultipleKey() {
 162                 return $this->is_multiple;
 163         }
 164
 165         function type() {
 166                 return $this->type;
 167         }
 168 }
 169
 170 /**
 171  * @ingroup Database
 172  */
 173 class DatabaseOracle extends DatabaseBase {
 174         var $mInsertId = null;
 175         var $mLastResult = null;
 176         var $numeric_version = null;
 177         var $lastResult = null;
 178         var $cursor = 0;
 179         var $mAffectedRows;
 180
 181         var $ignore_DUP_VAL_ON_INDEX = false;
 182         var $sequenceData = null;
 183
 184         var $defaultCharset = 'AL32UTF8';
 185
 186         var $mFieldInfoCache = array();
 187
 188         function __construct( $server = false, $user = false, $password = false, $dbName = false,
 189                 $flags = 0, $tablePrefix = 'get from global' )
 190         {
 191                 $tablePrefix = $tablePrefix == 'get from global' ? $tablePrefix : strtoupper( $tablePrefix );
 192                 parent::__construct( $server, $user, $password, $dbName, $flags, $tablePrefix );
 193                 wfRunHooks( 'DatabaseOraclePostInit', array( &$this ) );
 194         }
 195
 196         function getType() {
 197                 return 'oracle';
 198         }
 199
 200         function cascadingDeletes() {
 201                 return true;
 202         }
 203         function cleanupTriggers() {
 204                 return true;
 205         }
 206         function strictIPs() {
 207                 return true;
 208         }
 209         function realTimestamps() {
 210                 return true;
 211         }
 212         function implicitGroupby() {
 213                 return false;
 214         }
 215         function implicitOrderby() {
 216                 return false;
 217         }
 218         function searchableIPs() {
 219                 return true;
 220         }
 221
 222         static function newFromParams( $server, $user, $password, $dbName, $flags = 0, $tablePrefix )
 223         {
 224                 return new DatabaseOracle( $server, $user, $password, $dbName, $flags, $tablePrefix );
 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                 if ( $this->mFlags & DBO_DEFAULT ) {
 260                         $this->mConn = oci_new_connect( $this->mUser, $this->mPassword, $this->mServer, $this->defaultCharset, $session_mode );
 261                 } else {
 262                         $this->mConn = oci_connect( $this->mUser, $this->mPassword, $this->mServer, $this->defaultCharset, $session_mode );
 263                 }
 264
 265                 if ( $this->mUser != $this->mDBname ) {
 266                         //change current schema in session
 267                         $this->selectDB( $this->mDBname );
 268                 }
 269
 270                 if ( !$this->mConn ) {
 271                         throw new DBConnectionError( $this, $this->lastError() );
 272                 }
 273
 274                 $this->mOpened = true;
 275
 276                 # removed putenv calls because they interfere with the system globaly
 277                 $this->doQuery( 'ALTER SESSION SET NLS_TIMESTAMP_FORMAT=\'DD-MM-YYYY HH24:MI:SS.FF6\'' );
 278                 $this->doQuery( 'ALTER SESSION SET NLS_TIMESTAMP_TZ_FORMAT=\'DD-MM-YYYY HH24:MI:SS.FF6\'' );
 279                 return $this->mConn;
 280         }
 281
 282         /**
 283          * Closes a database connection, if it is open
 284          * Returns success, true if already closed
 285          */
 286         function close() {
 287                 $this->mOpened = false;
 288                 if ( $this->mConn ) {
 289                         return oci_close( $this->mConn );
 290                 } else {
 291                         return true;
 292                 }
 293         }
 294
 295         function execFlags() {
 296                 return $this->mTrxLevel ? OCI_DEFAULT : OCI_COMMIT_ON_SUCCESS;
 297         }
 298
 299         function doQuery( $sql ) {
 300                 wfDebug( "SQL: [$sql]\n" );
 301                 if ( !mb_check_encoding( $sql ) ) {
 302                         throw new MWException( "SQL encoding is invalid\n$sql" );
 303                 }
 304
 305                 // handle some oracle specifics
 306                 // remove AS column/table/subquery namings
 307                 if ( !defined( 'MEDIAWIKI_INSTALL' ) ) {
 308                         $sql = preg_replace( '/ as /i', ' ', $sql );
 309                 }
 310                 // Oracle has issues with UNION clause if the statement includes LOB fields
 311                 // So we do a UNION ALL and then filter the results array with array_unique
 312                 $union_unique = ( preg_match( '/\/\* UNION_UNIQUE \*\/ /', $sql ) != 0 );
 313                 // EXPLAIN syntax in Oracle is EXPLAIN PLAN FOR and it return nothing
 314                 // you have to select data from plan table after explain
 315                 $explain_id = date( 'dmYHis' );
 316
 317                 $sql = preg_replace( '/^EXPLAIN /', 'EXPLAIN PLAN SET STATEMENT_ID = \'' . $explain_id . '\' FOR', $sql, 1, $explain_count );
 318
 319                 wfSuppressWarnings();
 320
 321                 if ( ( $this->mLastResult = $stmt = oci_parse( $this->mConn, $sql ) ) === false ) {
 322                         $e = oci_error( $this->mConn );
 323                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 324                         return false;
 325                 }
 326
 327                 if ( !oci_execute( $stmt, $this->execFlags() ) ) {
 328                         $e = oci_error( $stmt );
 329                         if ( !$this->ignore_DUP_VAL_ON_INDEX || $e['code'] != '1' ) {
 330                                 $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 331                                 return false;
 332                         }
 333                 }
 334
 335                 wfRestoreWarnings();
 336
 337                 if ( $explain_count > 0 ) {
 338                         return $this->doQuery( 'SELECT id, cardinality "ROWS" FROM plan_table WHERE statement_id = \'' . $explain_id . '\'' );
 339                 } elseif ( oci_statement_type( $stmt ) == 'SELECT' ) {
 340                         return new ORAResult( $this, $stmt, $union_unique );
 341                 } else {
 342                         $this->mAffectedRows = oci_num_rows( $stmt );
 343                         return true;
 344                 }
 345         }
 346
 347         function queryIgnore( $sql, $fname = '' ) {
 348                 return $this->query( $sql, $fname, true );
 349         }
 350
 351         function freeResult( $res ) {
 352                 if ( $res instanceof ORAResult ) {
 353                         $res->free();
 354                 } else {
 355                         $res->result->free();
 356                 }
 357         }
 358
 359         function fetchObject( $res ) {
 360                 if ( $res instanceof ORAResult ) {
 361                         return $res->numRows();
 362                 } else {
 363                         return $res->result->fetchObject();
 364                 }
 365         }
 366
 367         function fetchRow( $res ) {
 368                 if ( $res instanceof ORAResult ) {
 369                         return $res->fetchRow();
 370                 } else {
 371                         return $res->result->fetchRow();
 372                 }
 373         }
 374
 375         function numRows( $res ) {
 376                 if ( $res instanceof ORAResult ) {
 377                         return $res->numRows();
 378                 } else {
 379                         return $res->result->numRows();
 380                 }
 381         }
 382
 383         function numFields( $res ) {
 384                 if ( $res instanceof ORAResult ) {
 385                         return $res->numFields();
 386                 } else {
 387                         return $res->result->numFields();
 388                 }
 389         }
 390
 391         function fieldName( $stmt, $n ) {
 392                 return oci_field_name( $stmt, $n );
 393         }
 394
 395         /**
 396          * This must be called after nextSequenceVal
 397          */
 398         function insertId() {
 399                 return $this->mInsertId;
 400         }
 401
 402         function dataSeek( $res, $row ) {
 403                 if ( $res instanceof ORAResult ) {
 404                         $res->seek( $row );
 405                 } else {
 406                         $res->result->seek( $row );
 407                 }
 408         }
 409
 410         function lastError() {
 411                 if ( $this->mConn === false ) {
 412                         $e = oci_error();
 413                 } else {
 414                         $e = oci_error( $this->mConn );
 415                 }
 416                 return $e['message'];
 417         }
 418
 419         function lastErrno() {
 420                 if ( $this->mConn === false ) {
 421                         $e = oci_error();
 422                 } else {
 423                         $e = oci_error( $this->mConn );
 424                 }
 425                 return $e['code'];
 426         }
 427
 428         function affectedRows() {
 429                 return $this->mAffectedRows;
 430         }
 431
 432         /**
 433          * Returns information about an index
 434          * If errors are explicitly ignored, returns NULL on failure
 435          */
 436         function indexInfo( $table, $index, $fname = 'DatabaseOracle::indexExists' ) {
 437                 return false;
 438         }
 439
 440         function indexUnique( $table, $index, $fname = 'DatabaseOracle::indexUnique' ) {
 441                 return false;
 442         }
 443
 444         function insert( $table, $a, $fname = 'DatabaseOracle::insert', $options = array() ) {
 445                 if ( !count( $a ) ) {
 446                         return true;
 447                 }
 448
 449                 if ( !is_array( $options ) ) {
 450                         $options = array( $options );
 451                 }
 452
 453                 if ( in_array( 'IGNORE', $options ) ) {
 454                         $this->ignore_DUP_VAL_ON_INDEX = true;
 455                 }
 456
 457                 if ( !is_array( reset( $a ) ) ) {
 458                         $a = array( $a );
 459                 }
 460
 461                 foreach ( $a as &$row ) {
 462                         $this->insertOneRow( $table, $row, $fname );
 463                 }
 464                 $retVal = true;
 465
 466                 if ( in_array( 'IGNORE', $options ) ) {
 467                         $this->ignore_DUP_VAL_ON_INDEX = false;
 468                 }
 469
 470                 return $retVal;
 471         }
 472
 473         private function fieldBindStatement ( $table, $col, &$val, $includeCol = false ) {
 474                 $col_info = $this->fieldInfoMulti( $table, $col );
 475                 $col_type = $col_info != false ? $col_info->type() : 'CONSTANT';
 476
 477                 $bind = '';
 478                 if ( is_numeric( $col ) ) {
 479                         $bind = $val;
 480                         $val = null;
 481                         return $bind;
 482                 } else if ( $includeCol ) {
 483                         $bind = "$col = ";
 484                 }
 485
 486                 if ( $val == '' && $val !== 0 && $col_type != 'BLOB' && $col_type != 'CLOB' ) {
 487                         $val = null;
 488                 }
 489
 490                 if ( $val === null ) {
 491                         if ( $col_info != false && $col_info->nullable() == 0 && $col_info->defaultValue() != null ) {
 492                                 $bind .= 'DEFAULT';
 493                         } else {
 494                                 $bind .= 'NULL';
 495                         }
 496                 } else {
 497                         $bind .= ':' . $col;
 498                 }
 499
 500                 return $bind;
 501         }
 502
 503         private function insertOneRow( $table, $row, $fname ) {
 504                 global $wgContLang;
 505
 506                 $table = $this->tableName( $table );
 507                 // "INSERT INTO tables (a, b, c)"
 508                 $sql = "INSERT INTO " . $table . " (" . join( ',', array_keys( $row ) ) . ')';
 509                 $sql .= " VALUES (";
 510
 511                 // for each value, append ":key"
 512                 $first = true;
 513                 foreach ( $row as $col => &$val ) {
 514                         if ( !$first ) {
 515                                 $sql .= ', ';
 516                         } else {
 517                                 $first = false;
 518                         }
 519
 520                         $sql .= $this->fieldBindStatement( $table, $col, $val );
 521                 }
 522                 $sql .= ')';
 523
 524                 if ( ( $this->mLastResult = $stmt = oci_parse( $this->mConn, $sql ) ) === false ) {
 525                         $e = oci_error( $this->mConn );
 526                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 527                         return false;
 528                 }
 529                 foreach ( $row as $col => &$val ) {
 530                         $col_info = $this->fieldInfoMulti( $table, $col );
 531                         $col_type = $col_info != false ? $col_info->type() : 'CONSTANT';
 532
 533                         if ( $val === null ) {
 534                                 // do nothing ... null was inserted in statement creation
 535                         } elseif ( $col_type != 'BLOB' && $col_type != 'CLOB' ) {
 536                                 if ( is_object( $val ) ) {
 537                                         $val = $val->getData();
 538                                 }
 539
 540                                 if ( preg_match( '/^timestamp.*/i', $col_type ) == 1 && strtolower( $val ) == 'infinity' ) {
 541                                         $val = '31-12-2030 12:00:00.000000';
 542                                 }
 543
 544                                 $val = ( $wgContLang != null ) ? $wgContLang->checkTitleEncoding( $val ) : $val;
 545                                 if ( oci_bind_by_name( $stmt, ":$col", $val ) === false ) {
 546                                         $e = oci_error( $stmt );
 547                                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 548                                         return false;
 549                                 }
 550                         } else {
 551                                 if ( ( $lob[$col] = oci_new_descriptor( $this->mConn, OCI_D_LOB ) ) === false ) {
 552                                         $e = oci_error( $stmt );
 553                                         throw new DBUnexpectedError( $this, "Cannot create LOB descriptor: " . $e['message'] );
 554                                 }
 555
 556                                 if ( $col_type == 'BLOB' ) {
 557                                         $lob[$col]->writeTemporary( $val );
 558                                         oci_bind_by_name( $stmt, ":$col", $lob[$col], - 1, SQLT_BLOB );
 559                                 } else {
 560                                         $lob[$col]->writeTemporary( $val );
 561                                         oci_bind_by_name( $stmt, ":$col", $lob[$col], - 1, OCI_B_CLOB );
 562                                 }
 563                         }
 564                 }
 565
 566                 wfSuppressWarnings();
 567
 568                 if ( oci_execute( $stmt, OCI_DEFAULT ) === false ) {
 569                         $e = oci_error( $stmt );
 570                         if ( !$this->ignore_DUP_VAL_ON_INDEX || $e['code'] != '1' ) {
 571                                 $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 572                                 return false;
 573                         } else {
 574                                 $this->mAffectedRows = oci_num_rows( $stmt );
 575                         }
 576                 } else {
 577                         $this->mAffectedRows = oci_num_rows( $stmt );
 578                 }
 579
 580                 wfRestoreWarnings();
 581
 582                 if ( isset( $lob ) ) {
 583                         foreach ( $lob as $lob_v ) {
 584                                 $lob_v->free();
 585                         }
 586                 }
 587
 588                 if ( !$this->mTrxLevel ) {
 589                         oci_commit( $this->mConn );
 590                 }
 591
 592                 oci_free_statement( $stmt );
 593         }
 594
 595         function insertSelect( $destTable, $srcTable, $varMap, $conds, $fname = 'DatabaseOracle::insertSelect',
 596                 $insertOptions = array(), $selectOptions = array() )
 597         {
 598                 $destTable = $this->tableName( $destTable );
 599                 if ( !is_array( $selectOptions ) ) {
 600                         $selectOptions = array( $selectOptions );
 601                 }
 602                 list( $startOpts, $useIndex, $tailOpts ) = $this->makeSelectOptions( $selectOptions );
 603                 if ( is_array( $srcTable ) ) {
 604                         $srcTable =  implode( ',', array_map( array( &$this, 'tableName' ), $srcTable ) );
 605                 } else {
 606                         $srcTable = $this->tableName( $srcTable );
 607                 }
 608
 609                 if ( ( $sequenceData = $this->getSequenceData( $destTable ) ) !== false &&
 610                                 !isset( $varMap[$sequenceData['column']] ) )
 611                 {
 612                         $varMap[$sequenceData['column']] = 'GET_SEQUENCE_VALUE(\'' . $sequenceData['sequence'] . '\')';
 613                 }
 614
 615                 // count-alias subselect fields to avoid abigious definition errors
 616                 $i = 0;
 617                 foreach ( $varMap as &$val ) {
 618                         $val = $val . ' field' . ( $i++ );
 619                 }
 620
 621                 $sql = "INSERT INTO $destTable (" . implode( ',', array_keys( $varMap ) ) . ')' .
 622                         " SELECT $startOpts " . implode( ',', $varMap ) .
 623                         " FROM $srcTable $useIndex ";
 624                 if ( $conds != '*' ) {
 625                         $sql .= ' WHERE ' . $this->makeList( $conds, LIST_AND );
 626                 }
 627                 $sql .= " $tailOpts";
 628
 629                 if ( in_array( 'IGNORE', $insertOptions ) ) {
 630                         $this->ignore_DUP_VAL_ON_INDEX = true;
 631                 }
 632
 633                 $retval = $this->query( $sql, $fname );
 634
 635                 if ( in_array( 'IGNORE', $insertOptions ) ) {
 636                         $this->ignore_DUP_VAL_ON_INDEX = false;
 637                 }
 638
 639                 return $retval;
 640         }
 641
 642         function tableName( $name ) {
 643                 global $wgSharedDB, $wgSharedPrefix, $wgSharedTables;
 644                 /*
 645                 Replace reserved words with better ones
 646                 Using uppercase because that's the only way Oracle can handle
 647                 quoted tablenames
 648                 */
 649                 switch( $name ) {
 650                         case 'user':
 651                                 $name = 'MWUSER';
 652                                 break;
 653                         case 'text':
 654                                 $name = 'PAGECONTENT';
 655                                 break;
 656                 }
 657
 658                 /*
 659                         The rest of procedure is equal to generic Databse class
 660                         except for the quoting style
 661                 */
 662                 if ( $name[0] == '"' && substr( $name, - 1, 1 ) == '"' ) {
 663                         return $name;
 664                 }
 665                 if ( preg_match( '/(^|\s)(DISTINCT|JOIN|ON|AS)(\s|$)/i', $name ) !== 0 ) {
 666                         return $name;
 667                 }
 668                 $dbDetails = array_reverse( explode( '.', $name, 2 ) );
 669                 if ( isset( $dbDetails[1] ) ) {
 670                         @list( $table, $database ) = $dbDetails;
 671                 } else {
 672                         @list( $table ) = $dbDetails;
 673                 }
 674
 675                 $prefix = $this->mTablePrefix;
 676
 677                 if ( isset( $database ) ) {
 678                         $table = ( $table[0] == '`' ? $table : "`{$table}`" );
 679                 }
 680
 681                 if ( !isset( $database ) && isset( $wgSharedDB ) && $table[0] != '"'
 682                         && isset( $wgSharedTables )
 683                         && is_array( $wgSharedTables )
 684                         && in_array( $table, $wgSharedTables )
 685                 ) {
 686                         $database = $wgSharedDB;
 687                         $prefix   = isset( $wgSharedPrefix ) ? $wgSharedPrefix : $prefix;
 688                 }
 689
 690                 if ( isset( $database ) ) {
 691                         $database = ( $database[0] == '"' ? $database : "\"{$database}\"" );
 692                 }
 693                 $table = ( $table[0] == '"') ? $table : "\"{$prefix}{$table}\"" ;
 694
 695                 $tableName = ( isset( $database ) ? "{$database}.{$table}" : "{$table}" );
 696
 697                 return strtoupper( $tableName );
 698         }
 699
 700         /**
 701          * Return the next in a sequence, save the value for retrieval via insertId()
 702          */
 703         function nextSequenceValue( $seqName ) {
 704                 $res = $this->query( "SELECT $seqName.nextval FROM dual" );
 705                 $row = $this->fetchRow( $res );
 706                 $this->mInsertId = $row[0];
 707                 return $this->mInsertId;
 708         }
 709
 710         /**
 711          * Return sequence_name if table has a sequence
 712          */
 713         private function getSequenceData( $table ) {
 714                 if ( $this->sequenceData == null ) {
 715                         $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\'' );
 716
 717                         while ( ( $row = $result->fetchRow() ) !== false ) {
 718                                 $this->sequenceData[$this->tableName( $row[1] )] = array(
 719                                         'sequence' => $row[0],
 720                                         'column' => $row[2]
 721                                 );
 722                         }
 723                 }
 724
 725                 return ( isset( $this->sequenceData[$table] ) ) ? $this->sequenceData[$table] : false;
 726         }
 727
 728         /**
 729          * REPLACE query wrapper
 730          * Oracle simulates this with a DELETE followed by INSERT
 731          * $row is the row to insert, an associative array
 732          * $uniqueIndexes is an array of indexes. Each element may be either a
 733          * field name or an array of field names
 734          *
 735          * It may be more efficient to leave off unique indexes which are unlikely to collide.
 736          * However if you do this, you run the risk of encountering errors which wouldn't have
 737          * occurred in MySQL.
 738          *
 739          * @param $table String: table name
 740          * @param $uniqueIndexes Array: array of indexes. Each element may be
 741          *                       either a field name or an array of field names
 742          * @param $rows Array: rows to insert to $table
 743          * @param $fname String: function name, you can use __METHOD__ here
 744          */
 745         function replace( $table, $uniqueIndexes, $rows, $fname = 'DatabaseOracle::replace' ) {
 746                 $table = $this->tableName( $table );
 747
 748                 if ( count( $rows ) == 0 ) {
 749                         return;
 750                 }
 751
 752                 # Single row case
 753                 if ( !is_array( reset( $rows ) ) ) {
 754                         $rows = array( $rows );
 755                 }
 756
 757                 $sequenceData = $this->getSequenceData( $table );
 758
 759                 foreach ( $rows as $row ) {
 760                         # Delete rows which collide
 761                         if ( $uniqueIndexes ) {
 762                                 $condsDelete = array();
 763                                 foreach ( $uniqueIndexes as $index ) {
 764                                         $condsDelete[$index] = $row[$index];
 765                                 }
 766                                 if ( count( $condsDelete ) > 0 ) {
 767                                         $this->delete( $table, $condsDelete, $fname );
 768                                 }
 769                         }
 770
 771                         if ( $sequenceData !== false && !isset( $row[$sequenceData['column']] ) ) {
 772                                 $row[$sequenceData['column']] = $this->nextSequenceValue( $sequenceData['sequence'] );
 773                         }
 774
 775                         # Now insert the row
 776                         $this->insert( $table, $row, $fname );
 777                 }
 778         }
 779
 780         # DELETE where the condition is a join
 781         function deleteJoin( $delTable, $joinTable, $delVar, $joinVar, $conds, $fname = 'DatabaseOracle::deleteJoin' ) {
 782                 if ( !$conds ) {
 783                         throw new DBUnexpectedError( $this, 'DatabaseOracle::deleteJoin() called with empty $conds' );
 784                 }
 785
 786                 $delTable = $this->tableName( $delTable );
 787                 $joinTable = $this->tableName( $joinTable );
 788                 $sql = "DELETE FROM $delTable WHERE $delVar IN (SELECT $joinVar FROM $joinTable ";
 789                 if ( $conds != '*' ) {
 790                         $sql .= 'WHERE ' . $this->makeList( $conds, LIST_AND );
 791                 }
 792                 $sql .= ')';
 793
 794                 $this->query( $sql, $fname );
 795         }
 796
 797         # Returns the size of a text field, or -1 for "unlimited"
 798         function textFieldSize( $table, $field ) {
 799                 $fieldInfoData = $this->fieldInfo( $table, $field);
 800                 if ( $fieldInfoData->type == 'varchar' ) {
 801                         $size = $row->size - 4;
 802                 } else {
 803                         $size = $row->size;
 804                 }
 805                 return $size;
 806         }
 807
 808         function limitResult( $sql, $limit, $offset = false ) {
 809                 if ( $offset === false ) {
 810                         $offset = 0;
 811                 }
 812                 return "SELECT * FROM ($sql) WHERE rownum >= (1 + $offset) AND rownum < (1 + $limit + $offset)";
 813         }
 814
 815         function unionQueries( $sqls, $all ) {
 816                 $glue = ' UNION ALL ';
 817                 return 'SELECT * ' . ( $all ? '':'/* UNION_UNIQUE */ ' ) . 'FROM (' . implode( $glue, $sqls ) . ')' ;
 818         }
 819
 820         function wasDeadlock() {
 821                 return $this->lastErrno() == 'OCI-00060';
 822         }
 823
 824         function duplicateTableStructure( $oldName, $newName, $temporary = false, $fname = 'DatabaseOracle::duplicateTableStructure' ) {
 825                 global $wgDBprefix;
 826
 827                 $temporary = $temporary ? 'TRUE' : 'FALSE';
 828
 829                 $newName = trim( strtoupper( $newName ), '"');
 830                 $oldName = trim( strtoupper( $oldName ), '"');
 831
 832                 $tabName = substr( $newName, strlen( $wgDBprefix ) );
 833                 $oldPrefix = substr( $oldName, 0, strlen( $oldName ) - strlen( $tabName ) );
 834
 835                 return $this->doQuery( 'BEGIN DUPLICATE_TABLE(\'' . $tabName . '\', \'' . $oldPrefix . '\', \'' . strtoupper( $wgDBprefix ) . '\', ' . $temporary . '); END;' );
 836         }
 837
 838         function timestamp( $ts = 0 ) {
 839                 return wfTimestamp( TS_ORACLE, $ts );
 840         }
 841
 842         /**
 843          * Return aggregated value function call
 844          */
 845         function aggregateValue ( $valuedata, $valuename = 'value' ) {
 846                 return $valuedata;
 847         }
 848
 849         function reportQueryError( $error, $errno, $sql, $fname, $tempIgnore = false ) {
 850                 # Ignore errors during error handling to avoid infinite
 851                 # recursion
 852                 $ignore = $this->ignoreErrors( true );
 853                 ++$this->mErrorCount;
 854
 855                 if ( $ignore || $tempIgnore ) {
 856                         wfDebug( "SQL ERROR (ignored): $error\n" );
 857                         $this->ignoreErrors( $ignore );
 858                 } else {
 859                         throw new DBQueryError( $this, $error, $errno, $sql, $fname );
 860                 }
 861         }
 862
 863         /**
 864          * @return string wikitext of a link to the server software's web site
 865          */
 866         public static function getSoftwareLink() {
 867                 return '[http://www.oracle.com/ Oracle]';
 868         }
 869
 870         /**
 871          * @return string Version information from the database
 872          */
 873         function getServerVersion() {
 874                 //better version number, fallback on driver
 875                 $rset = $this->doQuery( 'SELECT version FROM product_component_version WHERE UPPER(product) LIKE \'ORACLE DATABASE%\'' );
 876                 if ( !( $row =  $rset->fetchRow() ) ) {
 877                         return oci_server_version( $this->mConn );
 878                 }
 879                 return $row['version'];
 880         }
 881
 882         /**
 883          * Query whether a given table exists (in the given schema, or the default mw one if not given)
 884          */
 885         function tableExists( $table ) {
 886                 $SQL = "SELECT 1 FROM user_tables WHERE table_name='$table'";
 887                 $res = $this->doQuery( $SQL );
 888                 if ( $res ) {
 889                         $count = $res->numRows();
 890                         $res->free();
 891                 } else {
 892                         $count = 0;
 893                 }
 894                 return $count;
 895         }
 896
 897         /**
 898          * Function translates mysql_fetch_field() functionality on ORACLE.
 899          * Caching is present for reducing query time.
 900          * For internal calls. Use fieldInfo for normal usage.
 901          * Returns false if the field doesn't exist
 902          *
 903          * @param $table Array
 904          * @param $field String
 905          */
 906         private function fieldInfoMulti( $table, $field ) {
 907                 $field = strtoupper( $field );
 908                 if ( is_array( $table ) ) {
 909                         $table = array_map( array( &$this, 'tableName' ), $table );
 910                         $tableWhere = 'IN (';
 911                         foreach( $table as &$singleTable ) {
 912                                 $singleTable = strtoupper( trim( $singleTable, '"' ) );
 913                                 if ( isset( $this->mFieldInfoCache["$singleTable.$field"] ) ) {
 914                                         return $this->mFieldInfoCache["$singleTable.$field"];
 915                                 }
 916                                 $tableWhere .= '\'' . $singleTable . '\',';
 917                         }
 918                         $tableWhere = rtrim( $tableWhere, ',' ) . ')';
 919                 } else {
 920                         $table = strtoupper( trim( $this->tableName( $table ), '"' ) );
 921                         if ( isset( $this->mFieldInfoCache["$table.$field"] ) ) {
 922                                 return $this->mFieldInfoCache["$table.$field"];
 923                         }
 924                         $tableWhere = '= \''.$table.'\'';
 925                 }
 926
 927                 $fieldInfoStmt = oci_parse( $this->mConn, 'SELECT * FROM wiki_field_info_full WHERE table_name '.$tableWhere.' and column_name = \''.$field.'\'' );
 928                 if ( oci_execute( $fieldInfoStmt, OCI_DEFAULT ) === false ) {
 929                         $e = oci_error( $fieldInfoStmt );
 930                         $this->reportQueryError( $e['message'], $e['code'], 'fieldInfo QUERY', __METHOD__ );
 931                         return false;
 932                 }
 933                 $res = new ORAResult( $this, $fieldInfoStmt );
 934                 if ( $res->numRows() == 0 ) {
 935                         if ( is_array( $table ) ) {
 936                                 foreach( $table as &$singleTable ) {
 937                                         $this->mFieldInfoCache["$singleTable.$field"] = false;
 938                                 }
 939                         } else {
 940                                 $this->mFieldInfoCache["$table.$field"] = false;
 941                         }
 942                         $fieldInfoTemp = null;
 943                 } else {
 944                         $fieldInfoTemp = new ORAField( $res->fetchRow() );
 945                         $table = $fieldInfoTemp->tableName();
 946                         $this->mFieldInfoCache["$table.$field"] = $fieldInfoTemp;
 947                 }
 948                 $res->free();
 949                 return $fieldInfoTemp;
 950         }
 951
 952         function fieldInfo( $table, $field ) {
 953                 if ( is_array( $table ) ) {
 954                         throw new DBUnexpectedError( $this, 'Database::fieldInfo called with table array!' );
 955                 }
 956                 return $this->fieldInfoMulti ($table, $field);
 957         }
 958
 959         function begin( $fname = '' ) {
 960                 $this->mTrxLevel = 1;
 961         }
 962
 963         function commit( $fname = '' ) {
 964                 oci_commit( $this->mConn );
 965                 $this->mTrxLevel = 0;
 966         }
 967
 968         /* Not even sure why this is used in the main codebase... */
 969         function limitResultForUpdate( $sql, $num ) {
 970                 return $sql;
 971         }
 972
 973         /* defines must comply with ^define\s*([^\s=]*)\s*=\s?'\{\$([^\}]*)\}'; */
 974         function sourceStream( $fp, $lineCallback = false, $resultCallback = false ) {
 975                 $cmd = '';
 976                 $done = false;
 977                 $dollarquote = false;
 978
 979                 $replacements = array();
 980
 981                 while ( ! feof( $fp ) ) {
 982                         if ( $lineCallback ) {
 983                                 call_user_func( $lineCallback );
 984                         }
 985                         $line = trim( fgets( $fp, 1024 ) );
 986                         $sl = strlen( $line ) - 1;
 987
 988                         if ( $sl < 0 ) {
 989                                 continue;
 990                         }
 991                         if ( '-' == $line { 0 } && '-' == $line { 1 } ) {
 992                                 continue;
 993                         }
 994
 995                         // Allow dollar quoting for function declarations
 996                         if ( substr( $line, 0, 8 ) == '/*$mw$*/' ) {
 997                                 if ( $dollarquote ) {
 998                                         $dollarquote = false;
 999                                         $line = str_replace( '/*$mw$*/', '', $line ); // remove dollarquotes
1000                                         $done = true;
1001                                 } else {
1002                                         $dollarquote = true;
1003                                 }
1004                         } elseif ( !$dollarquote ) {
1005                                 if ( ';' == $line { $sl } && ( $sl < 2 || ';' != $line { $sl - 1 } ) ) {
1006                                         $done = true;
1007                                         $line = substr( $line, 0, $sl );
1008                                 }
1009                         }
1010
1011                         if ( $cmd != '' ) {
1012                                 $cmd .= ' ';
1013                         }
1014                         $cmd .= "$line\n";
1015
1016                         if ( $done ) {
1017                                 $cmd = str_replace( ';;', ";", $cmd );
1018                                 if ( strtolower( substr( $cmd, 0, 6 ) ) == 'define' ) {
1019                                         if ( preg_match( '/^define\s*([^\s=]*)\s*=\s*\'\{\$([^\}]*)\}\'/', $cmd, $defines ) ) {
1020                                                 $replacements[$defines[2]] = $defines[1];
1021                                         }
1022                                 } else {
1023                                         foreach ( $replacements as $mwVar => $scVar ) {
1024                                                 $cmd = str_replace( '&' . $scVar . '.', '{$' . $mwVar . '}', $cmd );
1025                                         }
1026
1027                                         $cmd = $this->replaceVars( $cmd );
1028                                         $res = $this->doQuery( $cmd );
1029                                         if ( $resultCallback ) {
1030                                                 call_user_func( $resultCallback, $res, $this );
1031                                         }
1032
1033                                         if ( false === $res ) {
1034                                                 $err = $this->lastError();
1035                                                 return "Query \"{$cmd}\" failed with error code \"$err\".\n";
1036                                         }
1037                                 }
1038
1039                                 $cmd = '';
1040                                 $done = false;
1041                         }
1042                 }
1043                 return true;
1044         }
1045
1046         function setup_database() {
1047                 $res = $this->sourceFile( "../maintenance/oracle/tables.sql" );
1048                 if ( $res === true ) {
1049                         print " done.</li>\n";
1050                 } else {
1051                         print " <b>FAILED</b></li>\n";
1052                         dieout( htmlspecialchars( $res ) );
1053                 }
1054
1055                 // Avoid the non-standard "REPLACE INTO" syntax
1056                 echo "<li>Populating interwiki table</li>\n";
1057                 $f = fopen( "../maintenance/interwiki.sql", 'r' );
1058                 if ( !$f ) {
1059                         dieout( "Could not find the interwiki.sql file" );
1060                 }
1061
1062                 // do it like the postgres :D
1063                 $SQL = "INSERT INTO " . $this->tableName( 'interwiki' ) . " (iw_prefix,iw_url,iw_local) VALUES ";
1064                 while ( !feof( $f ) ) {
1065                         $line = fgets( $f, 1024 );
1066                         $matches = array();
1067                         if ( !preg_match( '/^\s*(\(.+?),(\d)\)/', $line, $matches ) ) {
1068                                 continue;
1069                         }
1070                         $this->query( "$SQL $matches[1],$matches[2])" );
1071                 }
1072
1073                 echo "<li>Table interwiki successfully populated</li>\n";
1074         }
1075
1076         function selectDB( $db ) {
1077                 if ( $db == null || $db == $this->mUser ) { return true; }
1078                 $sql = 'ALTER SESSION SET CURRENT_SCHEMA=' . strtoupper($db);
1079                 $stmt = oci_parse( $this->mConn, $sql );
1080                 if ( !oci_execute( $stmt ) ) {
1081                         $e = oci_error( $stmt );
1082                         if ( $e['code'] != '1435' ) {
1083                                 $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
1084                         }
1085                         return false;
1086                 }
1087                 return true;
1088         }
1089
1090         function strencode( $s ) {
1091                 return str_replace( "'", "''", $s );
1092         }
1093
1094         function addQuotes( $s ) {
1095                 global $wgContLang;
1096                 if ( isset( $wgContLang->mLoaded ) && $wgContLang->mLoaded ) {
1097                         $s = $wgContLang->checkTitleEncoding( $s );
1098                 }
1099                 return "'" . $this->strencode( $s ) . "'";
1100         }
1101
1102         function quote_ident( $s ) {
1103                 return $s;
1104         }
1105
1106         function selectRow( $table, $vars, $conds, $fname = 'DatabaseOracle::selectRow', $options = array(), $join_conds = array() ) {
1107                 global $wgContLang;
1108
1109                 $conds2 = array();
1110                 $conds = ( $conds != null && !is_array( $conds ) ) ? array( $conds ) : $conds;
1111                 foreach ( $conds as $col => $val ) {
1112                         $col_info = $this->fieldInfoMulti( $table, $col );
1113                         $col_type = $col_info != false ? $col_info->type() : 'CONSTANT';
1114                         if ( $col_type == 'CLOB' ) {
1115                                 $conds2['TO_CHAR(' . $col . ')'] = $wgContLang->checkTitleEncoding( $val );
1116                         } elseif ( $col_type == 'VARCHAR2' && !mb_check_encoding( $val ) ) {
1117                                 $conds2[$col] = $wgContLang->checkTitleEncoding( $val );
1118                         } else {
1119                                 $conds2[$col] = $val;
1120                         }
1121                 }
1122
1123                 return parent::selectRow( $table, $vars, $conds2, $fname, $options, $join_conds );
1124         }
1125
1126         /**
1127          * Returns an optional USE INDEX clause to go after the table, and a
1128          * string to go at the end of the query
1129          *
1130          * @private
1131          *
1132          * @param $options Array: an associative array of options to be turned into
1133          *              an SQL query, valid keys are listed in the function.
1134          * @return array
1135          */
1136         function makeSelectOptions( $options ) {
1137                 $preLimitTail = $postLimitTail = '';
1138                 $startOpts = '';
1139
1140                 $noKeyOptions = array();
1141                 foreach ( $options as $key => $option ) {
1142                         if ( is_numeric( $key ) ) {
1143                                 $noKeyOptions[$option] = true;
1144                         }
1145                 }
1146
1147                 if ( isset( $options['GROUP BY'] ) ) {
1148                         $preLimitTail .= " GROUP BY {$options['GROUP BY']}";
1149                 }
1150                 if ( isset( $options['ORDER BY'] ) ) {
1151                         $preLimitTail .= " ORDER BY {$options['ORDER BY']}";
1152                 }
1153
1154                 # if ( isset( $noKeyOptions['FOR UPDATE'] ) ) $tailOpts .= ' FOR UPDATE';
1155                 # if ( isset( $noKeyOptions['LOCK IN SHARE MODE'] ) ) $tailOpts .= ' LOCK IN SHARE MODE';
1156                 if ( isset( $noKeyOptions['DISTINCT'] ) || isset( $noKeyOptions['DISTINCTROW'] ) ) {
1157                         $startOpts .= 'DISTINCT';
1158                 }
1159
1160                 if ( isset( $options['USE INDEX'] ) && ! is_array( $options['USE INDEX'] ) ) {
1161                         $useIndex = $this->useIndexClause( $options['USE INDEX'] );
1162                 } else {
1163                         $useIndex = '';
1164                 }
1165
1166                 return array( $startOpts, $useIndex, $preLimitTail, $postLimitTail );
1167         }
1168
1169         public function delete( $table, $conds, $fname = 'DatabaseOracle::delete' ) {
1170                 global $wgContLang;
1171
1172                 if ( $wgContLang != null && $conds != '*' ) {
1173                         $conds2 = array();
1174                         $conds = ( $conds != null && !is_array( $conds ) ) ? array( $conds ) : $conds;
1175                         foreach ( $conds as $col => $val ) {
1176                                 $col_info = $this->fieldInfoMulti( $table, $col );
1177                                 $col_type = $col_info != false ? $col_info->type() : 'CONSTANT';
1178                                 if ( $col_type == 'CLOB' ) {
1179                                         $conds2['TO_CHAR(' . $col . ')'] = $wgContLang->checkTitleEncoding( $val );
1180                                 } else {
1181                                         if ( is_array( $val ) ) {
1182                                                 $conds2[$col] = $val;
1183                                                 foreach ( $conds2[$col] as &$val2 ) {
1184                                                         $val2 = $wgContLang->checkTitleEncoding( $val2 );
1185                                                 }
1186                                         } else {
1187                                                 $conds2[$col] = $wgContLang->checkTitleEncoding( $val );
1188                                         }
1189                                 }
1190                         }
1191
1192                         return parent::delete( $table, $conds2, $fname );
1193                 } else {
1194                         return parent::delete( $table, $conds, $fname );
1195                 }
1196         }
1197
1198         function update( $table, $values, $conds, $fname = 'DatabaseOracle::update', $options = array() ) {
1199                 global $wgContLang;
1200
1201                 $table = $this->tableName( $table );
1202                 $opts = $this->makeUpdateOptions( $options );
1203                 $sql = "UPDATE $opts $table SET ";
1204
1205                 $first = true;
1206                 foreach ( $values as $col => &$val ) {
1207                         $sqlSet = $this->fieldBindStatement( $table, $col, $val, true );
1208
1209                         if ( !$first ) {
1210                                 $sqlSet = ', ' . $sqlSet;
1211                         } else {
1212                                 $first = false;
1213                         }
1214                         $sql .= $sqlSet;
1215                 }
1216
1217                 if ( $conds != '*' ) {
1218                         $sql .= ' WHERE ' . $this->makeList( $conds, LIST_AND );
1219                 }
1220
1221                 if ( ( $this->mLastResult = $stmt = oci_parse( $this->mConn, $sql ) ) === false ) {
1222                         $e = oci_error( $this->mConn );
1223                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
1224                         return false;
1225                 }
1226                 foreach ( $values as $col => &$val ) {
1227                         $col_info = $this->fieldInfoMulti( $table, $col );
1228                         $col_type = $col_info != false ? $col_info->type() : 'CONSTANT';
1229
1230                         if ( $val === null ) {
1231                                 // do nothing ... null was inserted in statement creation
1232                         } elseif ( $col_type != 'BLOB' && $col_type != 'CLOB' ) {
1233                                 if ( is_object( $val ) ) {
1234                                         $val = $val->getData();
1235                                 }
1236
1237                                 if ( preg_match( '/^timestamp.*/i', $col_type ) == 1 && strtolower( $val ) == 'infinity' ) {
1238                                         $val = '31-12-2030 12:00:00.000000';
1239                                 }
1240
1241                                 $val = ( $wgContLang != null ) ? $wgContLang->checkTitleEncoding( $val ) : $val;
1242                                 if ( oci_bind_by_name( $stmt, ":$col", $val ) === false ) {
1243                                         $e = oci_error( $stmt );
1244                                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
1245                                         return false;
1246                                 }
1247                         } else {
1248                                 if ( ( $lob[$col] = oci_new_descriptor( $this->mConn, OCI_D_LOB ) ) === false ) {
1249                                         $e = oci_error( $stmt );
1250                                         throw new DBUnexpectedError( $this, "Cannot create LOB descriptor: " . $e['message'] );
1251                                 }
1252
1253                                 if ( $col_type == 'BLOB' ) {
1254                                         $lob[$col]->writeTemporary( $val );
1255                                         oci_bind_by_name( $stmt, ":$col", $lob[$col], - 1, SQLT_BLOB );
1256                                 } else {
1257                                         $lob[$col]->writeTemporary( $val );
1258                                         oci_bind_by_name( $stmt, ":$col", $lob[$col], - 1, OCI_B_CLOB );
1259                                 }
1260                         }
1261                 }
1262
1263                 wfSuppressWarnings();
1264
1265                 if ( oci_execute( $stmt, OCI_DEFAULT ) === false ) {
1266                         $e = oci_error( $stmt );
1267                         if ( !$this->ignore_DUP_VAL_ON_INDEX || $e['code'] != '1' ) {
1268                                 $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
1269                                 return false;
1270                         } else {
1271                                 $this->mAffectedRows = oci_num_rows( $stmt );
1272                         }
1273                 } else {
1274                         $this->mAffectedRows = oci_num_rows( $stmt );
1275                 }
1276
1277                 wfRestoreWarnings();
1278
1279                 if ( isset( $lob ) ) {
1280                         foreach ( $lob as $lob_v ) {
1281                                 $lob_v->free();
1282                         }
1283                 }
1284
1285                 if ( !$this->mTrxLevel ) {
1286                         oci_commit( $this->mConn );
1287                 }
1288
1289                 oci_free_statement( $stmt );
1290         }
1291
1292         function bitNot( $field ) {
1293                 // expecting bit-fields smaller than 4bytes
1294                 return 'BITNOT(' . $field . ')';
1295         }
1296
1297         function bitAnd( $fieldLeft, $fieldRight ) {
1298                 return 'BITAND(' . $fieldLeft . ', ' . $fieldRight . ')';
1299         }
1300
1301         function bitOr( $fieldLeft, $fieldRight ) {
1302                 return 'BITOR(' . $fieldLeft . ', ' . $fieldRight . ')';
1303         }
1304
1305         function setFakeMaster( $enabled = true ) { }
1306
1307         function getDBname() {
1308                 return $this->mDBname;
1309         }
1310
1311         function getServer() {
1312                 return $this->mServer;
1313         }
1314
1315         public function replaceVars( $ins ) {
1316                 $varnames = array( 'wgDBprefix' );
1317                 if ( $this->mFlags & DBO_SYSDBA ) {
1318                         $varnames[] = '_OracleDefTS';
1319                         $varnames[] = '_OracleTempTS';
1320                 }
1321
1322                 // Ordinary variables
1323                 foreach ( $varnames as $var ) {
1324                         if ( isset( $GLOBALS[$var] ) ) {
1325                                 $val = addslashes( $GLOBALS[$var] ); // FIXME: safety check?
1326                                 $ins = str_replace( '{$' . $var . '}', $val, $ins );
1327                                 $ins = str_replace( '/*$' . $var . '*/`', '`' . $val, $ins );
1328                                 $ins = str_replace( '/*$' . $var . '*/', $val, $ins );
1329                         }
1330                 }
1331
1332                 return parent::replaceVars( $ins );
1333         }
1334
1335         public function getSearchEngine() {
1336                 return 'SearchOracle';
1337         }
1338 } // end DatabaseOracle class