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( $this ) );
 186         }
 187
 188         function __destruct() {
 189                 if ($this->mOpened) {
 190                         wfSuppressWarnings();
 191                         $this->close();
 192                         wfRestoreWarnings();
 193                 }
 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         /**
 223          * Usually aborts on failure
 224          */
 225         function open( $server, $user, $password, $dbName ) {
 226                 if ( !function_exists( 'oci_connect' ) ) {
 227                         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" );
 228                 }
 229
 230                 $this->close();
 231                 $this->mUser = $user;
 232                 $this->mPassword = $password;
 233                 // changed internal variables functions
 234                 // mServer now holds the TNS endpoint
 235                 // mDBname is schema name if different from username
 236                 if ( !$server ) {
 237                         // backward compatibillity (server used to be null and TNS was supplied in dbname)
 238                         $this->mServer = $dbName;
 239                         $this->mDBname = $user;
 240                 } else {
 241                         $this->mServer = $server;
 242                         if ( !$dbName ) {
 243                                 $this->mDBname = $user;
 244                         } else {
 245                                 $this->mDBname = $dbName;
 246                         }
 247                 }
 248
 249                 if ( !strlen( $user ) ) { # e.g. the class is being loaded
 250                         return;
 251                 }
 252
 253                 $session_mode = $this->mFlags & DBO_SYSDBA ? OCI_SYSDBA : OCI_DEFAULT;
 254                 wfSuppressWarnings();
 255                 if ( $this->mFlags & DBO_DEFAULT ) {
 256                         $this->mConn = oci_new_connect( $this->mUser, $this->mPassword, $this->mServer, $this->defaultCharset, $session_mode );
 257                 } else {
 258                         $this->mConn = oci_connect( $this->mUser, $this->mPassword, $this->mServer, $this->defaultCharset, $session_mode );
 259                 }
 260                 wfRestoreWarnings();
 261
 262                 if ( $this->mUser != $this->mDBname ) {
 263                         //change current schema in session
 264                         $this->selectDB( $this->mDBname );
 265                 }
 266
 267                 if ( !$this->mConn ) {
 268                         throw new DBConnectionError( $this, $this->lastError() );
 269                 }
 270
 271                 $this->mOpened = true;
 272
 273                 # removed putenv calls because they interfere with the system globaly
 274                 $this->doQuery( 'ALTER SESSION SET NLS_TIMESTAMP_FORMAT=\'DD-MM-YYYY HH24:MI:SS.FF6\'' );
 275                 $this->doQuery( 'ALTER SESSION SET NLS_TIMESTAMP_TZ_FORMAT=\'DD-MM-YYYY HH24:MI:SS.FF6\'' );
 276                 return $this->mConn;
 277         }
 278
 279         /**
 280          * Closes a database connection, if it is open
 281          * Returns success, true if already closed
 282          */
 283         function close() {
 284                 $this->mOpened = false;
 285                 if ( $this->mConn ) {
 286                         if ( $this->mTrxLevel ) {
 287                                 $this->commit();
 288                         }
 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( !$this->getFlag( DBO_DDLMODE ) ) {
 308                         $sql = preg_replace( '/ as /i', ' ', $sql );
 309                 }
 310
 311                 // Oracle has issues with UNION clause if the statement includes LOB fields
 312                 // So we do a UNION ALL and then filter the results array with array_unique
 313                 $union_unique = ( preg_match( '/\/\* UNION_UNIQUE \*\/ /', $sql ) != 0 );
 314                 // EXPLAIN syntax in Oracle is EXPLAIN PLAN FOR and it return nothing
 315                 // you have to select data from plan table after explain
 316                 $explain_id = date( 'dmYHis' );
 317
 318                 $sql = preg_replace( '/^EXPLAIN /', 'EXPLAIN PLAN SET STATEMENT_ID = \'' . $explain_id . '\' FOR', $sql, 1, $explain_count );
 319
 320                 wfSuppressWarnings();
 321
 322                 if ( ( $this->mLastResult = $stmt = oci_parse( $this->mConn, $sql ) ) === false ) {
 323                         $e = oci_error( $this->mConn );
 324                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 325                         return false;
 326                 }
 327
 328                 if ( !oci_execute( $stmt, $this->execFlags() ) ) {
 329                         $e = oci_error( $stmt );
 330                         if ( !$this->ignore_DUP_VAL_ON_INDEX || $e['code'] != '1' ) {
 331                                 $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 332                                 return false;
 333                         }
 334                 }
 335
 336                 wfRestoreWarnings();
 337
 338                 if ( $explain_count > 0 ) {
 339                         return $this->doQuery( 'SELECT id, cardinality "ROWS" FROM plan_table WHERE statement_id = \'' . $explain_id . '\'' );
 340                 } elseif ( oci_statement_type( $stmt ) == 'SELECT' ) {
 341                         return new ORAResult( $this, $stmt, $union_unique );
 342                 } else {
 343                         $this->mAffectedRows = oci_num_rows( $stmt );
 344                         return true;
 345                 }
 346         }
 347
 348         function queryIgnore( $sql, $fname = '' ) {
 349                 return $this->query( $sql, $fname, true );
 350         }
 351
 352         function freeResult( $res ) {
 353                 if ( $res instanceof ResultWrapper ) {
 354                         $res = $res->result;
 355                 }
 356
 357                 $res->free();
 358         }
 359
 360         function fetchObject( $res ) {
 361                 if ( $res instanceof ResultWrapper ) {
 362                         $res = $res->result;
 363                 }
 364
 365                 return $res->fetchObject();
 366         }
 367
 368         function fetchRow( $res ) {
 369                 if ( $res instanceof ResultWrapper ) {
 370                         $res = $res->result;
 371                 }
 372
 373                 return $res->fetchRow();
 374         }
 375
 376         function numRows( $res ) {
 377                 if ( $res instanceof ResultWrapper ) {
 378                         $res = $res->result;
 379                 }
 380
 381                 return $res->numRows();
 382         }
 383
 384         function numFields( $res ) {
 385                 if ( $res instanceof ResultWrapper ) {
 386                         $res = $res->result;
 387                 }
 388
 389                 return $res->numFields();
 390         }
 391
 392         function fieldName( $stmt, $n ) {
 393                 return oci_field_name( $stmt, $n );
 394         }
 395
 396         /**
 397          * This must be called after nextSequenceVal
 398          */
 399         function insertId() {
 400                 return $this->mInsertId;
 401         }
 402
 403         function dataSeek( $res, $row ) {
 404                 if ( $res instanceof ORAResult ) {
 405                         $res->seek( $row );
 406                 } else {
 407                         $res->result->seek( $row );
 408                 }
 409         }
 410
 411         function lastError() {
 412                 if ( $this->mConn === false ) {
 413                         $e = oci_error();
 414                 } else {
 415                         $e = oci_error( $this->mConn );
 416                 }
 417                 return $e['message'];
 418         }
 419
 420         function lastErrno() {
 421                 if ( $this->mConn === false ) {
 422                         $e = oci_error();
 423                 } else {
 424                         $e = oci_error( $this->mConn );
 425                 }
 426                 return $e['code'];
 427         }
 428
 429         function affectedRows() {
 430                 return $this->mAffectedRows;
 431         }
 432
 433         /**
 434          * Returns information about an index
 435          * If errors are explicitly ignored, returns NULL on failure
 436          */
 437         function indexInfo( $table, $index, $fname = 'DatabaseOracle::indexExists' ) {
 438                 return false;
 439         }
 440
 441         function indexUnique( $table, $index, $fname = 'DatabaseOracle::indexUnique' ) {
 442                 return false;
 443         }
 444
 445         function insert( $table, $a, $fname = 'DatabaseOracle::insert', $options = array() ) {
 446                 if ( !count( $a ) ) {
 447                         return true;
 448                 }
 449
 450                 if ( !is_array( $options ) ) {
 451                         $options = array( $options );
 452                 }
 453
 454                 if ( in_array( 'IGNORE', $options ) ) {
 455                         $this->ignore_DUP_VAL_ON_INDEX = true;
 456                 }
 457
 458                 if ( !is_array( reset( $a ) ) ) {
 459                         $a = array( $a );
 460                 }
 461
 462                 foreach ( $a as &$row ) {
 463                         $this->insertOneRow( $table, $row, $fname );
 464                 }
 465                 $retVal = true;
 466
 467                 if ( in_array( 'IGNORE', $options ) ) {
 468                         $this->ignore_DUP_VAL_ON_INDEX = false;
 469                 }
 470
 471                 return $retVal;
 472         }
 473
 474         private function fieldBindStatement ( $table, $col, &$val, $includeCol = false ) {
 475                 $col_info = $this->fieldInfoMulti( $table, $col );
 476                 $col_type = $col_info != false ? $col_info->type() : 'CONSTANT';
 477
 478                 $bind = '';
 479                 if ( is_numeric( $col ) ) {
 480                         $bind = $val;
 481                         $val = null;
 482                         return $bind;
 483                 } else if ( $includeCol ) {
 484                         $bind = "$col = ";
 485                 }
 486
 487                 if ( $val == '' && $val !== 0 && $col_type != 'BLOB' && $col_type != 'CLOB' ) {
 488                         $val = null;
 489                 }
 490
 491                 if ( $val === null ) {
 492                         if ( $col_info != false && $col_info->isNullable() == 0 && $col_info->defaultValue() != null ) {
 493                                 $bind .= 'DEFAULT';
 494                         } else {
 495                                 $bind .= 'NULL';
 496                         }
 497                 } else {
 498                         $bind .= ':' . $col;
 499                 }
 500
 501                 return $bind;
 502         }
 503
 504         private function insertOneRow( $table, $row, $fname ) {
 505                 global $wgContLang;
 506
 507                 $table = $this->tableName( $table );
 508                 // "INSERT INTO tables (a, b, c)"
 509                 $sql = "INSERT INTO " . $table . " (" . join( ',', array_keys( $row ) ) . ')';
 510                 $sql .= " VALUES (";
 511
 512                 // for each value, append ":key"
 513                 $first = true;
 514                 foreach ( $row as $col => &$val ) {
 515                         if ( !$first ) {
 516                                 $sql .= ', ';
 517                         } else {
 518                                 $first = false;
 519                         }
 520
 521                         $sql .= $this->fieldBindStatement( $table, $col, $val );
 522                 }
 523                 $sql .= ')';
 524
 525                 if ( ( $this->mLastResult = $stmt = oci_parse( $this->mConn, $sql ) ) === false ) {
 526                         $e = oci_error( $this->mConn );
 527                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 528                         return false;
 529                 }
 530                 foreach ( $row as $col => &$val ) {
 531                         $col_info = $this->fieldInfoMulti( $table, $col );
 532                         $col_type = $col_info != false ? $col_info->type() : 'CONSTANT';
 533
 534                         if ( $val === null ) {
 535                                 // do nothing ... null was inserted in statement creation
 536                         } elseif ( $col_type != 'BLOB' && $col_type != 'CLOB' ) {
 537                                 if ( is_object( $val ) ) {
 538                                         $val = $val->fetch();
 539                                 }
 540
 541                                 if ( preg_match( '/^timestamp.*/i', $col_type ) == 1 && strtolower( $val ) == 'infinity' ) {
 542                                         $val = '31-12-2030 12:00:00.000000';
 543                                 }
 544
 545                                 $val = ( $wgContLang != null ) ? $wgContLang->checkTitleEncoding( $val ) : $val;
 546                                 if ( oci_bind_by_name( $stmt, ":$col", $val ) === false ) {
 547                                         $e = oci_error( $stmt );
 548                                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 549                                         return false;
 550                                 }
 551                         } else {
 552                                 if ( ( $lob[$col] = oci_new_descriptor( $this->mConn, OCI_D_LOB ) ) === false ) {
 553                                         $e = oci_error( $stmt );
 554                                         throw new DBUnexpectedError( $this, "Cannot create LOB descriptor: " . $e['message'] );
 555                                 }
 556
 557                                 if ( is_object( $val ) ) {
 558                                         $val = $val->fetch();
 559                                 }
 560
 561                                 if ( $col_type == 'BLOB' ) {
 562                                         $lob[$col]->writeTemporary( $val, OCI_TEMP_BLOB );
 563                                         oci_bind_by_name( $stmt, ":$col", $lob[$col], - 1, OCI_B_BLOB );
 564                                 } else {
 565                                         $lob[$col]->writeTemporary( $val, OCI_TEMP_CLOB );
 566                                         oci_bind_by_name( $stmt, ":$col", $lob[$col], - 1, OCI_B_CLOB );
 567                                 }
 568                         }
 569                 }
 570
 571                 wfSuppressWarnings();
 572
 573                 if ( oci_execute( $stmt, $this->execFlags() ) === false ) {
 574                         $e = oci_error( $stmt );
 575                         if ( !$this->ignore_DUP_VAL_ON_INDEX || $e['code'] != '1' ) {
 576                                 $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 577                                 return false;
 578                         } else {
 579                                 $this->mAffectedRows = oci_num_rows( $stmt );
 580                         }
 581                 } else {
 582                         $this->mAffectedRows = oci_num_rows( $stmt );
 583                 }
 584
 585                 wfRestoreWarnings();
 586
 587                 if ( isset( $lob ) ) {
 588                         foreach ( $lob as $lob_v ) {
 589                                 $lob_v->free();
 590                         }
 591                 }
 592
 593                 if ( !$this->mTrxLevel ) {
 594                         oci_commit( $this->mConn );
 595                 }
 596
 597                 oci_free_statement( $stmt );
 598         }
 599
 600         function insertSelect( $destTable, $srcTable, $varMap, $conds, $fname = 'DatabaseOracle::insertSelect',
 601                 $insertOptions = array(), $selectOptions = array() )
 602         {
 603                 $destTable = $this->tableName( $destTable );
 604                 if ( !is_array( $selectOptions ) ) {
 605                         $selectOptions = array( $selectOptions );
 606                 }
 607                 list( $startOpts, $useIndex, $tailOpts ) = $this->makeSelectOptions( $selectOptions );
 608                 if ( is_array( $srcTable ) ) {
 609                         $srcTable =  implode( ',', array_map( array( &$this, 'tableName' ), $srcTable ) );
 610                 } else {
 611                         $srcTable = $this->tableName( $srcTable );
 612                 }
 613
 614                 if ( ( $sequenceData = $this->getSequenceData( $destTable ) ) !== false &&
 615                                 !isset( $varMap[$sequenceData['column']] ) )
 616                 {
 617                         $varMap[$sequenceData['column']] = 'GET_SEQUENCE_VALUE(\'' . $sequenceData['sequence'] . '\')';
 618                 }
 619
 620                 // count-alias subselect fields to avoid abigious definition errors
 621                 $i = 0;
 622                 foreach ( $varMap as &$val ) {
 623                         $val = $val . ' field' . ( $i++ );
 624                 }
 625
 626                 $sql = "INSERT INTO $destTable (" . implode( ',', array_keys( $varMap ) ) . ')' .
 627                         " SELECT $startOpts " . implode( ',', $varMap ) .
 628                         " FROM $srcTable $useIndex ";
 629                 if ( $conds != '*' ) {
 630                         $sql .= ' WHERE ' . $this->makeList( $conds, LIST_AND );
 631                 }
 632                 $sql .= " $tailOpts";
 633
 634                 if ( in_array( 'IGNORE', $insertOptions ) ) {
 635                         $this->ignore_DUP_VAL_ON_INDEX = true;
 636                 }
 637
 638                 $retval = $this->query( $sql, $fname );
 639
 640                 if ( in_array( 'IGNORE', $insertOptions ) ) {
 641                         $this->ignore_DUP_VAL_ON_INDEX = false;
 642                 }
 643
 644                 return $retval;
 645         }
 646
 647         function tableName( $name, $quoted = true ) {
 648                 /*
 649                 Replace reserved words with better ones
 650                 Using uppercase because that's the only way Oracle can handle
 651                 quoted tablenames
 652                 */
 653                 switch( $name ) {
 654                         case 'user':
 655                                 $name = 'MWUSER';
 656                                 break;
 657                         case 'text':
 658                                 $name = 'PAGECONTENT';
 659                                 break;
 660                 }
 661
 662                 return parent::tableName( strtoupper( $name ), $quoted );
 663         }
 664
 665         /**
 666          * Return the next in a sequence, save the value for retrieval via insertId()
 667          */
 668         function nextSequenceValue( $seqName ) {
 669                 $res = $this->query( "SELECT $seqName.nextval FROM dual" );
 670                 $row = $this->fetchRow( $res );
 671                 $this->mInsertId = $row[0];
 672                 return $this->mInsertId;
 673         }
 674
 675         /**
 676          * Return sequence_name if table has a sequence
 677          */
 678         private function getSequenceData( $table ) {
 679                 if ( $this->sequenceData == null ) {
 680                         $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\'' );
 681
 682                         while ( ( $row = $result->fetchRow() ) !== false ) {
 683                                 $this->sequenceData[$this->tableName( $row[1] )] = array(
 684                                         'sequence' => $row[0],
 685                                         'column' => $row[2]
 686                                 );
 687                         }
 688                 }
 689
 690                 return ( isset( $this->sequenceData[$table] ) ) ? $this->sequenceData[$table] : false;
 691         }
 692
 693         /**
 694          * REPLACE query wrapper
 695          * Oracle simulates this with a DELETE followed by INSERT
 696          * $row is the row to insert, an associative array
 697          * $uniqueIndexes is an array of indexes. Each element may be either a
 698          * field name or an array of field names
 699          *
 700          * It may be more efficient to leave off unique indexes which are unlikely to collide.
 701          * However if you do this, you run the risk of encountering errors which wouldn't have
 702          * occurred in MySQL.
 703          *
 704          * @param $table String: table name
 705          * @param $uniqueIndexes Array: array of indexes. Each element may be
 706          *                       either a field name or an array of field names
 707          * @param $rows Array: rows to insert to $table
 708          * @param $fname String: function name, you can use __METHOD__ here
 709          */
 710         function replace( $table, $uniqueIndexes, $rows, $fname = 'DatabaseOracle::replace' ) {
 711                 $table = $this->tableName( $table );
 712
 713                 if ( count( $rows ) == 0 ) {
 714                         return;
 715                 }
 716
 717                 # Single row case
 718                 if ( !is_array( reset( $rows ) ) ) {
 719                         $rows = array( $rows );
 720                 }
 721
 722                 $sequenceData = $this->getSequenceData( $table );
 723
 724                 foreach ( $rows as $row ) {
 725                         # Delete rows which collide
 726                         if ( $uniqueIndexes ) {
 727                                 $condsDelete = array();
 728                                 foreach ( $uniqueIndexes as $index ) {
 729                                         $condsDelete[$index] = $row[$index];
 730                                 }
 731                                 if ( count( $condsDelete ) > 0 ) {
 732                                         $this->delete( $table, $condsDelete, $fname );
 733                                 }
 734                         }
 735
 736                         if ( $sequenceData !== false && !isset( $row[$sequenceData['column']] ) ) {
 737                                 $row[$sequenceData['column']] = $this->nextSequenceValue( $sequenceData['sequence'] );
 738                         }
 739
 740                         # Now insert the row
 741                         $this->insert( $table, $row, $fname );
 742                 }
 743         }
 744
 745         # DELETE where the condition is a join
 746         function deleteJoin( $delTable, $joinTable, $delVar, $joinVar, $conds, $fname = 'DatabaseOracle::deleteJoin' ) {
 747                 if ( !$conds ) {
 748                         throw new DBUnexpectedError( $this, 'DatabaseOracle::deleteJoin() called with empty $conds' );
 749                 }
 750
 751                 $delTable = $this->tableName( $delTable );
 752                 $joinTable = $this->tableName( $joinTable );
 753                 $sql = "DELETE FROM $delTable WHERE $delVar IN (SELECT $joinVar FROM $joinTable ";
 754                 if ( $conds != '*' ) {
 755                         $sql .= 'WHERE ' . $this->makeList( $conds, LIST_AND );
 756                 }
 757                 $sql .= ')';
 758
 759                 $this->query( $sql, $fname );
 760         }
 761
 762         # Returns the size of a text field, or -1 for "unlimited"
 763         function textFieldSize( $table, $field ) {
 764                 $fieldInfoData = $this->fieldInfo( $table, $field );
 765                 return $fieldInfoData->maxLength();
 766         }
 767
 768         function limitResult( $sql, $limit, $offset = false ) {
 769                 if ( $offset === false ) {
 770                         $offset = 0;
 771                 }
 772                 return "SELECT * FROM ($sql) WHERE rownum >= (1 + $offset) AND rownum < (1 + $limit + $offset)";
 773         }
 774
 775         function encodeBlob( $b ) {
 776                 return new Blob( $b );
 777         }
 778
 779         function decodeBlob( $b ) {
 780                 if ( $b instanceof Blob ) {
 781                         $b = $b->fetch();
 782                 }
 783                 return $b;
 784         }
 785
 786         function unionQueries( $sqls, $all ) {
 787                 $glue = ' UNION ALL ';
 788                 return 'SELECT * ' . ( $all ? '':'/* UNION_UNIQUE */ ' ) . 'FROM (' . implode( $glue, $sqls ) . ')' ;
 789         }
 790
 791         function wasDeadlock() {
 792                 return $this->lastErrno() == 'OCI-00060';
 793         }
 794
 795         function duplicateTableStructure( $oldName, $newName, $temporary = false, $fname = 'DatabaseOracle::duplicateTableStructure' ) {
 796                 global $wgDBprefix;
 797                 $this->setFlag( DBO_DDLMODE );
 798
 799                 $temporary = $temporary ? 'TRUE' : 'FALSE';
 800
 801                 $newName = strtoupper( $newName );
 802                 $oldName = strtoupper( $oldName );
 803
 804                 $tabName = $this->addIdentifierQuotes( substr( $newName, strlen( $wgDBprefix ) ) );
 805                 $oldPrefix = $this->addIdentifierQuotes( substr( $oldName, 0, strlen( $oldName ) - strlen( $tabName ) ) );
 806                 $newPrefix = $this->addIdentifierQuotes( $wgDBprefix );
 807
 808                 $this->clearFlag( DBO_DDLMODE );
 809                 return $this->doQuery( "BEGIN DUPLICATE_TABLE( $tabName, $oldPrefix, $newPrefix, $temporary ); END;" );
 810         }
 811
 812         function listTables( $prefix = null, $fname = 'DatabaseOracle::listTables' ) {
 813                 $listWhere = '';
 814                 if (!empty($prefix)) {
 815                         $listWhere = ' AND table_name LIKE \''.strtoupper($prefix).'%\'';
 816                 }
 817
 818                 $result = $this->doQuery( "SELECT table_name FROM user_tables WHERE table_name NOT LIKE '%!_IDX$_' ESCAPE '!' $listWhere" );
 819
 820                 // dirty code ... i know
 821                 $endArray = array();
 822                 $endArray[] = $prefix.'MWUSER';
 823                 $endArray[] = $prefix.'PAGE';
 824                 $endArray[] = $prefix.'IMAGE';
 825                 $fixedOrderTabs = $endArray;
 826                 while (($row = $result->fetchRow()) !== false) {
 827                         if (!in_array($row['table_name'], $fixedOrderTabs))
 828                                 $endArray[] = $row['table_name'];
 829                 }
 830
 831                 return $endArray;
 832         }
 833
 834         public function dropTable( $tableName, $fName = 'DatabaseOracle::dropTable' ) {
 835                 $tableName = $this->tableName($tableName);
 836                 if( !$this->tableExists( $tableName ) ) {
 837                         return false;
 838                 }
 839
 840                 return $this->doQuery( "DROP TABLE $tableName CASCADE CONSTRAINTS PURGE" );
 841         }
 842
 843         function timestamp( $ts = 0 ) {
 844                 return wfTimestamp( TS_ORACLE, $ts );
 845         }
 846
 847         /**
 848          * Return aggregated value function call
 849          */
 850         function aggregateValue ( $valuedata, $valuename = 'value' ) {
 851                 return $valuedata;
 852         }
 853
 854         function reportQueryError( $error, $errno, $sql, $fname, $tempIgnore = false ) {
 855                 # Ignore errors during error handling to avoid infinite
 856                 # recursion
 857                 $ignore = $this->ignoreErrors( true );
 858                 ++$this->mErrorCount;
 859
 860                 if ( $ignore || $tempIgnore ) {
 861                         wfDebug( "SQL ERROR (ignored): $error\n" );
 862                         $this->ignoreErrors( $ignore );
 863                 } else {
 864                         throw new DBQueryError( $this, $error, $errno, $sql, $fname );
 865                 }
 866         }
 867
 868         /**
 869          * @return string wikitext of a link to the server software's web site
 870          */
 871         public static function getSoftwareLink() {
 872                 return '[http://www.oracle.com/ Oracle]';
 873         }
 874
 875         /**
 876          * @return string Version information from the database
 877          */
 878         function getServerVersion() {
 879                 //better version number, fallback on driver
 880                 $rset = $this->doQuery( 'SELECT version FROM product_component_version WHERE UPPER(product) LIKE \'ORACLE DATABASE%\'' );
 881                 if ( !( $row =  $rset->fetchRow() ) ) {
 882                         return oci_server_version( $this->mConn );
 883                 }
 884                 return $row['version'];
 885         }
 886
 887         /**
 888          * Query whether a given table exists (in the given schema, or the default mw one if not given)
 889          */
 890         function tableExists( $table ) {
 891                 $table = $this->removeIdentifierQuotes($table);
 892                 $SQL = "SELECT 1 FROM user_tables WHERE table_name='$table'";
 893                 $res = $this->doQuery( $SQL );
 894                 if ( $res ) {
 895                         $count = $res->numRows();
 896                         $res->free();
 897                 } else {
 898                         $count = 0;
 899                 }
 900                 return $count;
 901         }
 902
 903         /**
 904          * Function translates mysql_fetch_field() functionality on ORACLE.
 905          * Caching is present for reducing query time.
 906          * For internal calls. Use fieldInfo for normal usage.
 907          * Returns false if the field doesn't exist
 908          *
 909          * @param $table Array
 910          * @param $field String
 911          * @return ORAField
 912          */
 913         private function fieldInfoMulti( $table, $field ) {
 914                 $field = strtoupper( $field );
 915                 if ( is_array( $table ) ) {
 916                         $table = array_map( array( &$this, 'tableName' ), $table );
 917                         $tableWhere = 'IN (';
 918                         foreach( $table as &$singleTable ) {
 919                                 $singleTable = $this->removeIdentifierQuotes($singleTable);
 920                                 if ( isset( $this->mFieldInfoCache["$singleTable.$field"] ) ) {
 921                                         return $this->mFieldInfoCache["$singleTable.$field"];
 922                                 }
 923                                 $tableWhere .= '\'' . $singleTable . '\',';
 924                         }
 925                         $tableWhere = rtrim( $tableWhere, ',' ) . ')';
 926                 } else {
 927                         $table = $this->removeIdentifierQuotes($table);
 928                         if ( isset( $this->mFieldInfoCache["$table.$field"] ) ) {
 929                                 return $this->mFieldInfoCache["$table.$field"];
 930                         }
 931                         $tableWhere = '= \''.$table.'\'';
 932                 }
 933
 934                 $fieldInfoStmt = oci_parse( $this->mConn, 'SELECT * FROM wiki_field_info_full WHERE table_name '.$tableWhere.' and column_name = \''.$field.'\'' );
 935                 if ( oci_execute( $fieldInfoStmt, $this->execFlags() ) === false ) {
 936                         $e = oci_error( $fieldInfoStmt );
 937                         $this->reportQueryError( $e['message'], $e['code'], 'fieldInfo QUERY', __METHOD__ );
 938                         return false;
 939                 }
 940                 $res = new ORAResult( $this, $fieldInfoStmt );
 941                 if ( $res->numRows() == 0 ) {
 942                         if ( is_array( $table ) ) {
 943                                 foreach( $table as &$singleTable ) {
 944                                         $this->mFieldInfoCache["$singleTable.$field"] = false;
 945                                 }
 946                         } else {
 947                                 $this->mFieldInfoCache["$table.$field"] = false;
 948                         }
 949                         $fieldInfoTemp = null;
 950                 } else {
 951                         $fieldInfoTemp = new ORAField( $res->fetchRow() );
 952                         $table = $fieldInfoTemp->tableName();
 953                         $this->mFieldInfoCache["$table.$field"] = $fieldInfoTemp;
 954                 }
 955                 $res->free();
 956                 return $fieldInfoTemp;
 957         }
 958
 959         /**
 960          * @throws DBUnexpectedError
 961          * @param  $table
 962          * @param  $field
 963          * @return ORAField
 964          */
 965         function fieldInfo( $table, $field ) {
 966                 if ( is_array( $table ) ) {
 967                         throw new DBUnexpectedError( $this, 'DatabaseOracle::fieldInfo called with table array!' );
 968                 }
 969                 return $this->fieldInfoMulti ($table, $field);
 970         }
 971
 972         function begin( $fname = 'DatabaseOracle::begin' ) {
 973                 $this->mTrxLevel = 1;
 974         }
 975
 976         function commit( $fname = 'DatabaseOracle::commit' ) {
 977                 if ( $this->mTrxLevel ) {
 978                         oci_commit( $this->mConn );
 979                         $this->mTrxLevel = 0;
 980                 }
 981         }
 982
 983         function rollback( $fname = 'DatabaseOracle::rollback' ) {
 984                 if ( $this->mTrxLevel ) {
 985                         oci_rollback( $this->mConn );
 986                         $this->mTrxLevel = 0;
 987                 }
 988         }
 989
 990         /* Not even sure why this is used in the main codebase... */
 991         function limitResultForUpdate( $sql, $num ) {
 992                 return $sql;
 993         }
 994
 995         /* defines must comply with ^define\s*([^\s=]*)\s*=\s?'\{\$([^\}]*)\}'; */
 996         function sourceStream( $fp, $lineCallback = false, $resultCallback = false, $fname = 'DatabaseOracle::sourceStream' ) {
 997                 $cmd = '';
 998                 $done = false;
 999                 $dollarquote = false;
1000
1001                 $replacements = array();
1002
1003                 while ( ! feof( $fp ) ) {
1004                         if ( $lineCallback ) {
1005                                 call_user_func( $lineCallback );
1006                         }
1007                         $line = trim( fgets( $fp, 1024 ) );
1008                         $sl = strlen( $line ) - 1;
1009
1010                         if ( $sl < 0 ) {
1011                                 continue;
1012                         }
1013                         if ( '-' == $line { 0 } && '-' == $line { 1 } ) {
1014                                 continue;
1015                         }
1016
1017                         // Allow dollar quoting for function declarations
1018                         if ( substr( $line, 0, 8 ) == '/*$mw$*/' ) {
1019                                 if ( $dollarquote ) {
1020                                         $dollarquote = false;
1021                                         $line = str_replace( '/*$mw$*/', '', $line ); // remove dollarquotes
1022                                         $done = true;
1023                                 } else {
1024                                         $dollarquote = true;
1025                                 }
1026                         } elseif ( !$dollarquote ) {
1027                                 if ( ';' == $line { $sl } && ( $sl < 2 || ';' != $line { $sl - 1 } ) ) {
1028                                         $done = true;
1029                                         $line = substr( $line, 0, $sl );
1030                                 }
1031                         }
1032
1033                         if ( $cmd != '' ) {
1034                                 $cmd .= ' ';
1035                         }
1036                         $cmd .= "$line\n";
1037
1038                         if ( $done ) {
1039                                 $cmd = str_replace( ';;', ";", $cmd );
1040                                 if ( strtolower( substr( $cmd, 0, 6 ) ) == 'define' ) {
1041                                         if ( preg_match( '/^define\s*([^\s=]*)\s*=\s*\'\{\$([^\}]*)\}\'/', $cmd, $defines ) ) {
1042                                                 $replacements[$defines[2]] = $defines[1];
1043                                         }
1044                                 } else {
1045                                         foreach ( $replacements as $mwVar => $scVar ) {
1046                                                 $cmd = str_replace( '&' . $scVar . '.', '`{$' . $mwVar . '}`', $cmd );
1047                                         }
1048
1049                                         $cmd = $this->replaceVars( $cmd );
1050                                         $res = $this->doQuery( $cmd );
1051                                         if ( $resultCallback ) {
1052                                                 call_user_func( $resultCallback, $res, $this );
1053                                         }
1054
1055                                         if ( false === $res ) {
1056                                                 $err = $this->lastError();
1057                                                 return "Query \"{$cmd}\" failed with error code \"$err\".\n";
1058                                         }
1059                                 }
1060
1061                                 $cmd = '';
1062                                 $done = false;
1063                         }
1064                 }
1065                 return true;
1066         }
1067
1068         function selectDB( $db ) {
1069                 $this->mDBname = $db;
1070                 if ( $db == null || $db == $this->mUser ) {
1071                         return true;
1072                 }
1073                 $sql = 'ALTER SESSION SET CURRENT_SCHEMA=' . strtoupper($db);
1074                 $stmt = oci_parse( $this->mConn, $sql );
1075                 wfSuppressWarnings();
1076                 $success = oci_execute( $stmt );
1077                 wfRestoreWarnings();
1078                 if ( !$success ) {
1079                         $e = oci_error( $stmt );
1080                         if ( $e['code'] != '1435' ) {
1081                                 $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
1082                         }
1083                         return false;
1084                 }
1085                 return true;
1086         }
1087
1088         function strencode( $s ) {
1089                 return str_replace( "'", "''", $s );
1090         }
1091
1092         function addQuotes( $s ) {
1093                 global $wgContLang;
1094                 if ( isset( $wgContLang->mLoaded ) && $wgContLang->mLoaded ) {
1095                         $s = $wgContLang->checkTitleEncoding( $s );
1096                 }
1097                 return "'" . $this->strencode( $s ) . "'";
1098         }
1099
1100         public function addIdentifierQuotes( $s ) {
1101                 if ( !$this->getFlag( DBO_DDLMODE ) ) {
1102                         $s = '/*Q*/' . $s;
1103                 }
1104                 return $s;
1105         }
1106
1107         public function removeIdentifierQuotes( $s ) {
1108                 return strpos($s, '/*Q*/') === FALSE ? $s : substr($s, 5);
1109         }
1110
1111         public function isQuotedIdentifier( $s ) {
1112                 return strpos($s, '/*Q*/') !== FALSE;
1113         }
1114
1115         function selectRow( $table, $vars, $conds, $fname = 'DatabaseOracle::selectRow', $options = array(), $join_conds = array() ) {
1116                 global $wgContLang;
1117
1118                 if ($conds != null) {
1119                         $conds2 = array();
1120                         $conds = ( !is_array( $conds ) ) ? array( $conds ) : $conds;
1121                         foreach ( $conds as $col => $val ) {
1122                                 $col_info = $this->fieldInfoMulti( $table, $col );
1123                                 $col_type = $col_info != false ? $col_info->type() : 'CONSTANT';
1124                                 if ( $col_type == 'CLOB' ) {
1125                                         $conds2['TO_CHAR(' . $col . ')'] = $wgContLang->checkTitleEncoding( $val );
1126                                 } elseif ( $col_type == 'VARCHAR2' && !mb_check_encoding( $val ) ) {
1127                                         $conds2[$col] = $wgContLang->checkTitleEncoding( $val );
1128                                 } else {
1129                                         $conds2[$col] = $val;
1130                                 }
1131                         }
1132
1133                         return parent::selectRow( $table, $vars, $conds2, $fname, $options, $join_conds );
1134                 } else {
1135                         return parent::selectRow( $table, $vars, $conds, $fname, $options, $join_conds );
1136                 }
1137         }
1138
1139         /**
1140          * Returns an optional USE INDEX clause to go after the table, and a
1141          * string to go at the end of the query
1142          *
1143          * @private
1144          *
1145          * @param $options Array: an associative array of options to be turned into
1146          *              an SQL query, valid keys are listed in the function.
1147          * @return array
1148          */
1149         function makeSelectOptions( $options ) {
1150                 $preLimitTail = $postLimitTail = '';
1151                 $startOpts = '';
1152
1153                 $noKeyOptions = array();
1154                 foreach ( $options as $key => $option ) {
1155                         if ( is_numeric( $key ) ) {
1156                                 $noKeyOptions[$option] = true;
1157                         }
1158                 }
1159
1160                 if ( isset( $options['GROUP BY'] ) ) {
1161                         $preLimitTail .= " GROUP BY {$options['GROUP BY']}";
1162                 }
1163                 if ( isset( $options['ORDER BY'] ) ) {
1164                         $preLimitTail .= " ORDER BY {$options['ORDER BY']}";
1165                 }
1166
1167                 # if ( isset( $noKeyOptions['FOR UPDATE'] ) ) $tailOpts .= ' FOR UPDATE';
1168                 # if ( isset( $noKeyOptions['LOCK IN SHARE MODE'] ) ) $tailOpts .= ' LOCK IN SHARE MODE';
1169                 if ( isset( $noKeyOptions['DISTINCT'] ) || isset( $noKeyOptions['DISTINCTROW'] ) ) {
1170                         $startOpts .= 'DISTINCT';
1171                 }
1172
1173                 if ( isset( $options['USE INDEX'] ) && ! is_array( $options['USE INDEX'] ) ) {
1174                         $useIndex = $this->useIndexClause( $options['USE INDEX'] );
1175                 } else {
1176                         $useIndex = '';
1177                 }
1178
1179                 return array( $startOpts, $useIndex, $preLimitTail, $postLimitTail );
1180         }
1181
1182         public function delete( $table, $conds, $fname = 'DatabaseOracle::delete' ) {
1183                 global $wgContLang;
1184
1185                 if ( $wgContLang != null && $conds != null && $conds != '*' ) {
1186                         $conds2 = array();
1187                         $conds = ( !is_array( $conds ) ) ? array( $conds ) : $conds;
1188                         foreach ( $conds as $col => $val ) {
1189                                 $col_info = $this->fieldInfoMulti( $table, $col );
1190                                 $col_type = $col_info != false ? $col_info->type() : 'CONSTANT';
1191                                 if ( $col_type == 'CLOB' ) {
1192                                         $conds2['TO_CHAR(' . $col . ')'] = $wgContLang->checkTitleEncoding( $val );
1193                                 } else {
1194                                         if ( is_array( $val ) ) {
1195                                                 $conds2[$col] = $val;
1196                                                 foreach ( $conds2[$col] as &$val2 ) {
1197                                                         $val2 = $wgContLang->checkTitleEncoding( $val2 );
1198                                                 }
1199                                         } else {
1200                                                 $conds2[$col] = $wgContLang->checkTitleEncoding( $val );
1201                                         }
1202                                 }
1203                         }
1204
1205                         return parent::delete( $table, $conds2, $fname );
1206                 } else {
1207                         return parent::delete( $table, $conds, $fname );
1208                 }
1209         }
1210
1211         function update( $table, $values, $conds, $fname = 'DatabaseOracle::update', $options = array() ) {
1212                 global $wgContLang;
1213
1214                 $table = $this->tableName( $table );
1215                 $opts = $this->makeUpdateOptions( $options );
1216                 $sql = "UPDATE $opts $table SET ";
1217
1218                 $first = true;
1219                 foreach ( $values as $col => &$val ) {
1220                         $sqlSet = $this->fieldBindStatement( $table, $col, $val, true );
1221
1222                         if ( !$first ) {
1223                                 $sqlSet = ', ' . $sqlSet;
1224                         } else {
1225                                 $first = false;
1226                         }
1227                         $sql .= $sqlSet;
1228                 }
1229
1230                 if ( $conds != '*' ) {
1231                         $sql .= ' WHERE ' . $this->makeList( $conds, LIST_AND );
1232                 }
1233
1234                 if ( ( $this->mLastResult = $stmt = oci_parse( $this->mConn, $sql ) ) === false ) {
1235                         $e = oci_error( $this->mConn );
1236                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
1237                         return false;
1238                 }
1239                 foreach ( $values as $col => &$val ) {
1240                         $col_info = $this->fieldInfoMulti( $table, $col );
1241                         $col_type = $col_info != false ? $col_info->type() : 'CONSTANT';
1242
1243                         if ( $val === null ) {
1244                                 // do nothing ... null was inserted in statement creation
1245                         } elseif ( $col_type != 'BLOB' && $col_type != 'CLOB' ) {
1246                                 if ( is_object( $val ) ) {
1247                                         $val = $val->getData();
1248                                 }
1249
1250                                 if ( preg_match( '/^timestamp.*/i', $col_type ) == 1 && strtolower( $val ) == 'infinity' ) {
1251                                         $val = '31-12-2030 12:00:00.000000';
1252                                 }
1253
1254                                 $val = ( $wgContLang != null ) ? $wgContLang->checkTitleEncoding( $val ) : $val;
1255                                 if ( oci_bind_by_name( $stmt, ":$col", $val ) === false ) {
1256                                         $e = oci_error( $stmt );
1257                                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
1258                                         return false;
1259                                 }
1260                         } else {
1261                                 if ( ( $lob[$col] = oci_new_descriptor( $this->mConn, OCI_D_LOB ) ) === false ) {
1262                                         $e = oci_error( $stmt );
1263                                         throw new DBUnexpectedError( $this, "Cannot create LOB descriptor: " . $e['message'] );
1264                                 }
1265
1266                                 if ( $col_type == 'BLOB' ) {
1267                                         $lob[$col]->writeTemporary( $val );
1268                                         oci_bind_by_name( $stmt, ":$col", $lob[$col], - 1, SQLT_BLOB );
1269                                 } else {
1270                                         $lob[$col]->writeTemporary( $val );
1271                                         oci_bind_by_name( $stmt, ":$col", $lob[$col], - 1, OCI_B_CLOB );
1272                                 }
1273                         }
1274                 }
1275
1276                 wfSuppressWarnings();
1277
1278                 if ( oci_execute( $stmt, $this->execFlags() ) === false ) {
1279                         $e = oci_error( $stmt );
1280                         if ( !$this->ignore_DUP_VAL_ON_INDEX || $e['code'] != '1' ) {
1281                                 $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
1282                                 return false;
1283                         } else {
1284                                 $this->mAffectedRows = oci_num_rows( $stmt );
1285                         }
1286                 } else {
1287                         $this->mAffectedRows = oci_num_rows( $stmt );
1288                 }
1289
1290                 wfRestoreWarnings();
1291
1292                 if ( isset( $lob ) ) {
1293                         foreach ( $lob as $lob_v ) {
1294                                 $lob_v->free();
1295                         }
1296                 }
1297
1298                 if ( !$this->mTrxLevel ) {
1299                         oci_commit( $this->mConn );
1300                 }
1301
1302                 oci_free_statement( $stmt );
1303         }
1304
1305         function bitNot( $field ) {
1306                 // expecting bit-fields smaller than 4bytes
1307                 return 'BITNOT(' . $field . ')';
1308         }
1309
1310         function bitAnd( $fieldLeft, $fieldRight ) {
1311                 return 'BITAND(' . $fieldLeft . ', ' . $fieldRight . ')';
1312         }
1313
1314         function bitOr( $fieldLeft, $fieldRight ) {
1315                 return 'BITOR(' . $fieldLeft . ', ' . $fieldRight . ')';
1316         }
1317
1318         function setFakeMaster( $enabled = true ) { }
1319
1320         function getDBname() {
1321                 return $this->mDBname;
1322         }
1323
1324         function getServer() {
1325                 return $this->mServer;
1326         }
1327
1328         public function getSearchEngine() {
1329                 return 'SearchOracle';
1330         }
1331 } // end DatabaseOracle class