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                 $tablePrefix = $tablePrefix == 'get from global' ? $tablePrefix : strtoupper( $tablePrefix );
 183                 parent::__construct( $server, $user, $password, $dbName, $flags, $tablePrefix );
 184                 wfRunHooks( 'DatabaseOraclePostInit', array( $this ) );
 185         }
 186
 187         function getType() {
 188                 return 'oracle';
 189         }
 190
 191         function cascadingDeletes() {
 192                 return true;
 193         }
 194         function cleanupTriggers() {
 195                 return true;
 196         }
 197         function strictIPs() {
 198                 return true;
 199         }
 200         function realTimestamps() {
 201                 return true;
 202         }
 203         function implicitGroupby() {
 204                 return false;
 205         }
 206         function implicitOrderby() {
 207                 return false;
 208         }
 209         function searchableIPs() {
 210                 return true;
 211         }
 212
 213         /**
 214          * Usually aborts on failure
 215          */
 216         function open( $server, $user, $password, $dbName ) {
 217                 if ( !function_exists( 'oci_connect' ) ) {
 218                         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" );
 219                 }
 220
 221                 $this->close();
 222                 $this->mUser = $user;
 223                 $this->mPassword = $password;
 224                 // changed internal variables functions
 225                 // mServer now holds the TNS endpoint
 226                 // mDBname is schema name if different from username
 227                 if ( !$server ) {
 228                         // backward compatibillity (server used to be null and TNS was supplied in dbname)
 229                         $this->mServer = $dbName;
 230                         $this->mDBname = $user;
 231                 } else {
 232                         $this->mServer = $server;
 233                         if ( !$dbName ) {
 234                                 $this->mDBname = $user;
 235                         } else {
 236                                 $this->mDBname = $dbName;
 237                         }
 238                 }
 239
 240                 if ( !strlen( $user ) ) { # e.g. the class is being loaded
 241                         return;
 242                 }
 243
 244                 $session_mode = $this->mFlags & DBO_SYSDBA ? OCI_SYSDBA : OCI_DEFAULT;
 245                 wfSuppressWarnings();
 246                 if ( $this->mFlags & DBO_DEFAULT ) {
 247                         $this->mConn = oci_new_connect( $this->mUser, $this->mPassword, $this->mServer, $this->defaultCharset, $session_mode );
 248                 } else {
 249                         $this->mConn = oci_connect( $this->mUser, $this->mPassword, $this->mServer, $this->defaultCharset, $session_mode );
 250                 }
 251                 wfRestoreWarnings();
 252
 253                 if ( $this->mUser != $this->mDBname ) {
 254                         //change current schema in session
 255                         $this->selectDB( $this->mDBname );
 256                 }
 257
 258                 if ( !$this->mConn ) {
 259                         throw new DBConnectionError( $this, $this->lastError() );
 260                 }
 261
 262                 $this->mOpened = true;
 263
 264                 # removed putenv calls because they interfere with the system globaly
 265                 $this->doQuery( 'ALTER SESSION SET NLS_TIMESTAMP_FORMAT=\'DD-MM-YYYY HH24:MI:SS.FF6\'' );
 266                 $this->doQuery( 'ALTER SESSION SET NLS_TIMESTAMP_TZ_FORMAT=\'DD-MM-YYYY HH24:MI:SS.FF6\'' );
 267                 return $this->mConn;
 268         }
 269
 270         /**
 271          * Closes a database connection, if it is open
 272          * Returns success, true if already closed
 273          */
 274         function close() {
 275                 $this->mOpened = false;
 276                 if ( $this->mConn ) {
 277                         return oci_close( $this->mConn );
 278                 } else {
 279                         return true;
 280                 }
 281         }
 282
 283         function execFlags() {
 284                 return $this->mTrxLevel ? OCI_DEFAULT : OCI_COMMIT_ON_SUCCESS;
 285         }
 286
 287         function doQuery( $sql ) {
 288                 wfDebug( "SQL: [$sql]\n" );
 289                 if ( !mb_check_encoding( $sql ) ) {
 290                         throw new MWException( "SQL encoding is invalid\n$sql" );
 291                 }
 292
 293                 // handle some oracle specifics
 294                 // remove AS column/table/subquery namings
 295                 if( !$this->getFlag( DBO_DDLMODE ) ) {
 296                         $sql = preg_replace( '/ as /i', ' ', $sql );
 297                 }
 298
 299                 // Oracle has issues with UNION clause if the statement includes LOB fields
 300                 // So we do a UNION ALL and then filter the results array with array_unique
 301                 $union_unique = ( preg_match( '/\/\* UNION_UNIQUE \*\/ /', $sql ) != 0 );
 302                 // EXPLAIN syntax in Oracle is EXPLAIN PLAN FOR and it return nothing
 303                 // you have to select data from plan table after explain
 304                 $explain_id = date( 'dmYHis' );
 305
 306                 $sql = preg_replace( '/^EXPLAIN /', 'EXPLAIN PLAN SET STATEMENT_ID = \'' . $explain_id . '\' FOR', $sql, 1, $explain_count );
 307
 308                 wfSuppressWarnings();
 309
 310                 if ( ( $this->mLastResult = $stmt = oci_parse( $this->mConn, $sql ) ) === false ) {
 311                         $e = oci_error( $this->mConn );
 312                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 313                         return false;
 314                 }
 315
 316                 if ( !oci_execute( $stmt, $this->execFlags() ) ) {
 317                         $e = oci_error( $stmt );
 318                         if ( !$this->ignore_DUP_VAL_ON_INDEX || $e['code'] != '1' ) {
 319                                 $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 320                                 return false;
 321                         }
 322                 }
 323
 324                 wfRestoreWarnings();
 325
 326                 if ( $explain_count > 0 ) {
 327                         return $this->doQuery( 'SELECT id, cardinality "ROWS" FROM plan_table WHERE statement_id = \'' . $explain_id . '\'' );
 328                 } elseif ( oci_statement_type( $stmt ) == 'SELECT' ) {
 329                         return new ORAResult( $this, $stmt, $union_unique );
 330                 } else {
 331                         $this->mAffectedRows = oci_num_rows( $stmt );
 332                         return true;
 333                 }
 334         }
 335
 336         function queryIgnore( $sql, $fname = '' ) {
 337                 return $this->query( $sql, $fname, true );
 338         }
 339
 340         function freeResult( $res ) {
 341                 if ( $res instanceof ResultWrapper ) {
 342                         $res = $res->result;
 343                 }
 344
 345                 $res->free();
 346         }
 347
 348         function fetchObject( $res ) {
 349                 if ( $res instanceof ResultWrapper ) {
 350                         $res = $res->result;
 351                 }
 352
 353                 return $res->fetchObject();
 354         }
 355
 356         function fetchRow( $res ) {
 357                 if ( $res instanceof ResultWrapper ) {
 358                         $res = $res->result;
 359                 }
 360
 361                 return $res->fetchRow();
 362         }
 363
 364         function numRows( $res ) {
 365                 if ( $res instanceof ResultWrapper ) {
 366                         $res = $res->result;
 367                 }
 368
 369                 return $res->numRows();
 370         }
 371
 372         function numFields( $res ) {
 373                 if ( $res instanceof ResultWrapper ) {
 374                         $res = $res->result;
 375                 }
 376
 377                 return $res->numFields();
 378         }
 379
 380         function fieldName( $stmt, $n ) {
 381                 return oci_field_name( $stmt, $n );
 382         }
 383
 384         /**
 385          * This must be called after nextSequenceVal
 386          */
 387         function insertId() {
 388                 return $this->mInsertId;
 389         }
 390
 391         function dataSeek( $res, $row ) {
 392                 if ( $res instanceof ORAResult ) {
 393                         $res->seek( $row );
 394                 } else {
 395                         $res->result->seek( $row );
 396                 }
 397         }
 398
 399         function lastError() {
 400                 if ( $this->mConn === false ) {
 401                         $e = oci_error();
 402                 } else {
 403                         $e = oci_error( $this->mConn );
 404                 }
 405                 return $e['message'];
 406         }
 407
 408         function lastErrno() {
 409                 if ( $this->mConn === false ) {
 410                         $e = oci_error();
 411                 } else {
 412                         $e = oci_error( $this->mConn );
 413                 }
 414                 return $e['code'];
 415         }
 416
 417         function affectedRows() {
 418                 return $this->mAffectedRows;
 419         }
 420
 421         /**
 422          * Returns information about an index
 423          * If errors are explicitly ignored, returns NULL on failure
 424          */
 425         function indexInfo( $table, $index, $fname = 'DatabaseOracle::indexExists' ) {
 426                 return false;
 427         }
 428
 429         function indexUnique( $table, $index, $fname = 'DatabaseOracle::indexUnique' ) {
 430                 return false;
 431         }
 432
 433         function insert( $table, $a, $fname = 'DatabaseOracle::insert', $options = array() ) {
 434                 if ( !count( $a ) ) {
 435                         return true;
 436                 }
 437
 438                 if ( !is_array( $options ) ) {
 439                         $options = array( $options );
 440                 }
 441
 442                 if ( in_array( 'IGNORE', $options ) ) {
 443                         $this->ignore_DUP_VAL_ON_INDEX = true;
 444                 }
 445
 446                 if ( !is_array( reset( $a ) ) ) {
 447                         $a = array( $a );
 448                 }
 449
 450                 foreach ( $a as &$row ) {
 451                         $this->insertOneRow( $table, $row, $fname );
 452                 }
 453                 $retVal = true;
 454
 455                 if ( in_array( 'IGNORE', $options ) ) {
 456                         $this->ignore_DUP_VAL_ON_INDEX = false;
 457                 }
 458
 459                 return $retVal;
 460         }
 461
 462         private function fieldBindStatement ( $table, $col, &$val, $includeCol = false ) {
 463                 $col_info = $this->fieldInfoMulti( $table, $col );
 464                 $col_type = $col_info != false ? $col_info->type() : 'CONSTANT';
 465
 466                 $bind = '';
 467                 if ( is_numeric( $col ) ) {
 468                         $bind = $val;
 469                         $val = null;
 470                         return $bind;
 471                 } else if ( $includeCol ) {
 472                         $bind = "$col = ";
 473                 }
 474
 475                 if ( $val == '' && $val !== 0 && $col_type != 'BLOB' && $col_type != 'CLOB' ) {
 476                         $val = null;
 477                 }
 478
 479                 if ( $val === null ) {
 480                         if ( $col_info != false && $col_info->isNullable() == 0 && $col_info->defaultValue() != null ) {
 481                                 $bind .= 'DEFAULT';
 482                         } else {
 483                                 $bind .= 'NULL';
 484                         }
 485                 } else {
 486                         $bind .= ':' . $col;
 487                 }
 488
 489                 return $bind;
 490         }
 491
 492         private function insertOneRow( $table, $row, $fname ) {
 493                 global $wgContLang;
 494
 495                 $table = $this->tableName( $table );
 496                 // "INSERT INTO tables (a, b, c)"
 497                 $sql = "INSERT INTO " . $table . " (" . join( ',', array_keys( $row ) ) . ')';
 498                 $sql .= " VALUES (";
 499
 500                 // for each value, append ":key"
 501                 $first = true;
 502                 foreach ( $row as $col => &$val ) {
 503                         if ( !$first ) {
 504                                 $sql .= ', ';
 505                         } else {
 506                                 $first = false;
 507                         }
 508
 509                         $sql .= $this->fieldBindStatement( $table, $col, $val );
 510                 }
 511                 $sql .= ')';
 512
 513                 if ( ( $this->mLastResult = $stmt = oci_parse( $this->mConn, $sql ) ) === false ) {
 514                         $e = oci_error( $this->mConn );
 515                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 516                         return false;
 517                 }
 518                 foreach ( $row as $col => &$val ) {
 519                         $col_info = $this->fieldInfoMulti( $table, $col );
 520                         $col_type = $col_info != false ? $col_info->type() : 'CONSTANT';
 521
 522                         if ( $val === null ) {
 523                                 // do nothing ... null was inserted in statement creation
 524                         } elseif ( $col_type != 'BLOB' && $col_type != 'CLOB' ) {
 525                                 if ( is_object( $val ) ) {
 526                                         $val = $val->fetch();
 527                                 }
 528
 529                                 if ( preg_match( '/^timestamp.*/i', $col_type ) == 1 && strtolower( $val ) == 'infinity' ) {
 530                                         $val = '31-12-2030 12:00:00.000000';
 531                                 }
 532
 533                                 $val = ( $wgContLang != null ) ? $wgContLang->checkTitleEncoding( $val ) : $val;
 534                                 if ( oci_bind_by_name( $stmt, ":$col", $val ) === false ) {
 535                                         $e = oci_error( $stmt );
 536                                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 537                                         return false;
 538                                 }
 539                         } else {
 540                                 if ( ( $lob[$col] = oci_new_descriptor( $this->mConn, OCI_D_LOB ) ) === false ) {
 541                                         $e = oci_error( $stmt );
 542                                         throw new DBUnexpectedError( $this, "Cannot create LOB descriptor: " . $e['message'] );
 543                                 }
 544
 545                                 if ( is_object( $val ) ) {
 546                                         $val = $val->fetch();
 547                                 }
 548
 549                                 if ( $col_type == 'BLOB' ) {
 550                                         $lob[$col]->writeTemporary( $val, OCI_TEMP_BLOB );
 551                                         oci_bind_by_name( $stmt, ":$col", $lob[$col], - 1, OCI_B_BLOB );
 552                                 } else {
 553                                         $lob[$col]->writeTemporary( $val, OCI_TEMP_CLOB );
 554                                         oci_bind_by_name( $stmt, ":$col", $lob[$col], - 1, OCI_B_CLOB );
 555                                 }
 556                         }
 557                 }
 558
 559                 wfSuppressWarnings();
 560
 561                 if ( oci_execute( $stmt, OCI_DEFAULT ) === false ) {
 562                         $e = oci_error( $stmt );
 563                         if ( !$this->ignore_DUP_VAL_ON_INDEX || $e['code'] != '1' ) {
 564                                 $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 565                                 return false;
 566                         } else {
 567                                 $this->mAffectedRows = oci_num_rows( $stmt );
 568                         }
 569                 } else {
 570                         $this->mAffectedRows = oci_num_rows( $stmt );
 571                 }
 572
 573                 wfRestoreWarnings();
 574
 575                 if ( isset( $lob ) ) {
 576                         foreach ( $lob as $lob_v ) {
 577                                 $lob_v->free();
 578                         }
 579                 }
 580
 581                 if ( !$this->mTrxLevel ) {
 582                         oci_commit( $this->mConn );
 583                 }
 584
 585                 oci_free_statement( $stmt );
 586         }
 587
 588         function insertSelect( $destTable, $srcTable, $varMap, $conds, $fname = 'DatabaseOracle::insertSelect',
 589                 $insertOptions = array(), $selectOptions = array() )
 590         {
 591                 $destTable = $this->tableName( $destTable );
 592                 if ( !is_array( $selectOptions ) ) {
 593                         $selectOptions = array( $selectOptions );
 594                 }
 595                 list( $startOpts, $useIndex, $tailOpts ) = $this->makeSelectOptions( $selectOptions );
 596                 if ( is_array( $srcTable ) ) {
 597                         $srcTable =  implode( ',', array_map( array( &$this, 'tableName' ), $srcTable ) );
 598                 } else {
 599                         $srcTable = $this->tableName( $srcTable );
 600                 }
 601
 602                 if ( ( $sequenceData = $this->getSequenceData( $destTable ) ) !== false &&
 603                                 !isset( $varMap[$sequenceData['column']] ) )
 604                 {
 605                         $varMap[$sequenceData['column']] = 'GET_SEQUENCE_VALUE(\'' . $sequenceData['sequence'] . '\')';
 606                 }
 607
 608                 // count-alias subselect fields to avoid abigious definition errors
 609                 $i = 0;
 610                 foreach ( $varMap as &$val ) {
 611                         $val = $val . ' field' . ( $i++ );
 612                 }
 613
 614                 $sql = "INSERT INTO $destTable (" . implode( ',', array_keys( $varMap ) ) . ')' .
 615                         " SELECT $startOpts " . implode( ',', $varMap ) .
 616                         " FROM $srcTable $useIndex ";
 617                 if ( $conds != '*' ) {
 618                         $sql .= ' WHERE ' . $this->makeList( $conds, LIST_AND );
 619                 }
 620                 $sql .= " $tailOpts";
 621
 622                 if ( in_array( 'IGNORE', $insertOptions ) ) {
 623                         $this->ignore_DUP_VAL_ON_INDEX = true;
 624                 }
 625
 626                 $retval = $this->query( $sql, $fname );
 627
 628                 if ( in_array( 'IGNORE', $insertOptions ) ) {
 629                         $this->ignore_DUP_VAL_ON_INDEX = false;
 630                 }
 631
 632                 return $retval;
 633         }
 634
 635         function tableName( $name ) {
 636                 global $wgSharedDB, $wgSharedPrefix, $wgSharedTables;
 637                 /*
 638                 Replace reserved words with better ones
 639                 Using uppercase because that's the only way Oracle can handle
 640                 quoted tablenames
 641                 */
 642                 switch( $name ) {
 643                         case 'user':
 644                                 $name = 'MWUSER';
 645                                 break;
 646                         case 'text':
 647                                 $name = 'PAGECONTENT';
 648                                 break;
 649                 }
 650
 651                 /*
 652                         The rest of procedure is equal to generic Databse class
 653                         except for the quoting style
 654                 */
 655                 if ( $name[0] == '"' && substr( $name, - 1, 1 ) == '"' ) {
 656                         return $name;
 657                 }
 658                 if ( preg_match( '/(^|\s)(DISTINCT|JOIN|ON|AS)(\s|$)/i', $name ) !== 0 ) {
 659                         return $name;
 660                 }
 661                 $dbDetails = array_reverse( explode( '.', $name, 2 ) );
 662                 if ( isset( $dbDetails[1] ) ) {
 663                         @list( $table, $database ) = $dbDetails;
 664                 } else {
 665                         @list( $table ) = $dbDetails;
 666                 }
 667
 668                 $prefix = $this->mTablePrefix;
 669
 670                 if ( isset( $database ) ) {
 671                         $table = ( $table[0] == '`' ? $table : "`{$table}`" );
 672                 }
 673
 674                 if ( !isset( $database ) && isset( $wgSharedDB ) && $table[0] != '"'
 675                         && isset( $wgSharedTables )
 676                         && is_array( $wgSharedTables )
 677                         && in_array( $table, $wgSharedTables )
 678                 ) {
 679                         $database = $wgSharedDB;
 680                         $prefix   = isset( $wgSharedPrefix ) ? $wgSharedPrefix : $prefix;
 681                 }
 682
 683                 if ( isset( $database ) ) {
 684                         $database = ( $database[0] == '"' ? $database : "\"{$database}\"" );
 685                 }
 686                 $table = ( $table[0] == '"') ? $table : "\"{$prefix}{$table}\"" ;
 687
 688                 $tableName = ( isset( $database ) ? "{$database}.{$table}" : "{$table}" );
 689
 690                 return strtoupper( $tableName );
 691         }
 692
 693         /**
 694          * Return the next in a sequence, save the value for retrieval via insertId()
 695          */
 696         function nextSequenceValue( $seqName ) {
 697                 $res = $this->query( "SELECT $seqName.nextval FROM dual" );
 698                 $row = $this->fetchRow( $res );
 699                 $this->mInsertId = $row[0];
 700                 return $this->mInsertId;
 701         }
 702
 703         /**
 704          * Return sequence_name if table has a sequence
 705          */
 706         private function getSequenceData( $table ) {
 707                 if ( $this->sequenceData == null ) {
 708                         $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\'' );
 709
 710                         while ( ( $row = $result->fetchRow() ) !== false ) {
 711                                 $this->sequenceData[$this->tableName( $row[1] )] = array(
 712                                         'sequence' => $row[0],
 713                                         'column' => $row[2]
 714                                 );
 715                         }
 716                 }
 717
 718                 return ( isset( $this->sequenceData[$table] ) ) ? $this->sequenceData[$table] : false;
 719         }
 720
 721         /**
 722          * REPLACE query wrapper
 723          * Oracle simulates this with a DELETE followed by INSERT
 724          * $row is the row to insert, an associative array
 725          * $uniqueIndexes is an array of indexes. Each element may be either a
 726          * field name or an array of field names
 727          *
 728          * It may be more efficient to leave off unique indexes which are unlikely to collide.
 729          * However if you do this, you run the risk of encountering errors which wouldn't have
 730          * occurred in MySQL.
 731          *
 732          * @param $table String: table name
 733          * @param $uniqueIndexes Array: array of indexes. Each element may be
 734          *                       either a field name or an array of field names
 735          * @param $rows Array: rows to insert to $table
 736          * @param $fname String: function name, you can use __METHOD__ here
 737          */
 738         function replace( $table, $uniqueIndexes, $rows, $fname = 'DatabaseOracle::replace' ) {
 739                 $table = $this->tableName( $table );
 740
 741                 if ( count( $rows ) == 0 ) {
 742                         return;
 743                 }
 744
 745                 # Single row case
 746                 if ( !is_array( reset( $rows ) ) ) {
 747                         $rows = array( $rows );
 748                 }
 749
 750                 $sequenceData = $this->getSequenceData( $table );
 751
 752                 foreach ( $rows as $row ) {
 753                         # Delete rows which collide
 754                         if ( $uniqueIndexes ) {
 755                                 $condsDelete = array();
 756                                 foreach ( $uniqueIndexes as $index ) {
 757                                         $condsDelete[$index] = $row[$index];
 758                                 }
 759                                 if ( count( $condsDelete ) > 0 ) {
 760                                         $this->delete( $table, $condsDelete, $fname );
 761                                 }
 762                         }
 763
 764                         if ( $sequenceData !== false && !isset( $row[$sequenceData['column']] ) ) {
 765                                 $row[$sequenceData['column']] = $this->nextSequenceValue( $sequenceData['sequence'] );
 766                         }
 767
 768                         # Now insert the row
 769                         $this->insert( $table, $row, $fname );
 770                 }
 771         }
 772
 773         # DELETE where the condition is a join
 774         function deleteJoin( $delTable, $joinTable, $delVar, $joinVar, $conds, $fname = 'DatabaseOracle::deleteJoin' ) {
 775                 if ( !$conds ) {
 776                         throw new DBUnexpectedError( $this, 'DatabaseOracle::deleteJoin() called with empty $conds' );
 777                 }
 778
 779                 $delTable = $this->tableName( $delTable );
 780                 $joinTable = $this->tableName( $joinTable );
 781                 $sql = "DELETE FROM $delTable WHERE $delVar IN (SELECT $joinVar FROM $joinTable ";
 782                 if ( $conds != '*' ) {
 783                         $sql .= 'WHERE ' . $this->makeList( $conds, LIST_AND );
 784                 }
 785                 $sql .= ')';
 786
 787                 $this->query( $sql, $fname );
 788         }
 789
 790         # Returns the size of a text field, or -1 for "unlimited"
 791         function textFieldSize( $table, $field ) {
 792                 $fieldInfoData = $this->fieldInfo( $table, $field );
 793                 return $fieldInfoData->maxLength();
 794         }
 795
 796         function limitResult( $sql, $limit, $offset = false ) {
 797                 if ( $offset === false ) {
 798                         $offset = 0;
 799                 }
 800                 return "SELECT * FROM ($sql) WHERE rownum >= (1 + $offset) AND rownum < (1 + $limit + $offset)";
 801         }
 802
 803         function encodeBlob( $b ) {
 804                 return new Blob( $b );
 805         }
 806
 807         function decodeBlob( $b ) {
 808                 if ( $b instanceof Blob ) {
 809                         $b = $b->fetch();
 810                 }
 811                 return $b;
 812         }
 813
 814         function unionQueries( $sqls, $all ) {
 815                 $glue = ' UNION ALL ';
 816                 return 'SELECT * ' . ( $all ? '':'/* UNION_UNIQUE */ ' ) . 'FROM (' . implode( $glue, $sqls ) . ')' ;
 817         }
 818
 819         function wasDeadlock() {
 820                 return $this->lastErrno() == 'OCI-00060';
 821         }
 822
 823         function duplicateTableStructure( $oldName, $newName, $temporary = false, $fname = 'DatabaseOracle::duplicateTableStructure' ) {
 824                 global $wgDBprefix;
 825
 826                 $temporary = $temporary ? 'TRUE' : 'FALSE';
 827
 828                 $newName = trim( strtoupper( $newName ), '"');
 829                 $oldName = trim( strtoupper( $oldName ), '"');
 830
 831                 $tabName = substr( $newName, strlen( $wgDBprefix ) );
 832                 $oldPrefix = substr( $oldName, 0, strlen( $oldName ) - strlen( $tabName ) );
 833
 834                 return $this->doQuery( 'BEGIN DUPLICATE_TABLE(\'' . $tabName . '\', \'' . $oldPrefix . '\', \'' . strtoupper( $wgDBprefix ) . '\', ' . $temporary . '); END;' );
 835         }
 836
 837         function listTables( $prefix = null, $fname = 'DatabaseOracle::listTables' ) {
 838                 $listWhere = '';
 839                 if (!empty($prefix)) {
 840                         $listWhere = ' AND table_name LIKE \''.strtoupper($prefix).'%\'';
 841                 }
 842
 843                 $result = $this->doQuery( "SELECT table_name FROM user_tables WHERE table_name NOT LIKE '%!_IDX$_' ESCAPE '!' $listWhere" );
 844
 845                 // dirty code ... i know
 846                 $endArray = array();
 847                 $endArray[] = $prefix.'MWUSER';
 848                 $endArray[] = $prefix.'PAGE';
 849                 $endArray[] = $prefix.'IMAGE';
 850                 $fixedOrderTabs = $endArray;
 851                 while (($row = $result->fetchRow()) !== false) {
 852                         if (!in_array($row['table_name'], $fixedOrderTabs))
 853                                 $endArray[] = $row['table_name'];
 854                 }
 855
 856                 return $endArray;
 857         }
 858
 859         public function dropTable( $tableName, $fName = 'DatabaseOracle::dropTable' ) {
 860                 $tableName = $this->tableName($tableName);
 861                 if( !$this->tableExists( $tableName ) ) {
 862                         return false;
 863                 }
 864
 865                 return $this->doQuery( "DROP TABLE $tableName CASCADE CONSTRAINTS PURGE" );
 866         }
 867
 868         function timestamp( $ts = 0 ) {
 869                 return wfTimestamp( TS_ORACLE, $ts );
 870         }
 871
 872         /**
 873          * Return aggregated value function call
 874          */
 875         function aggregateValue ( $valuedata, $valuename = 'value' ) {
 876                 return $valuedata;
 877         }
 878
 879         function reportQueryError( $error, $errno, $sql, $fname, $tempIgnore = false ) {
 880                 # Ignore errors during error handling to avoid infinite
 881                 # recursion
 882                 $ignore = $this->ignoreErrors( true );
 883                 ++$this->mErrorCount;
 884
 885                 if ( $ignore || $tempIgnore ) {
 886                         wfDebug( "SQL ERROR (ignored): $error\n" );
 887                         $this->ignoreErrors( $ignore );
 888                 } else {
 889                         throw new DBQueryError( $this, $error, $errno, $sql, $fname );
 890                 }
 891         }
 892
 893         /**
 894          * @return string wikitext of a link to the server software's web site
 895          */
 896         public static function getSoftwareLink() {
 897                 return '[http://www.oracle.com/ Oracle]';
 898         }
 899
 900         /**
 901          * @return string Version information from the database
 902          */
 903         function getServerVersion() {
 904                 //better version number, fallback on driver
 905                 $rset = $this->doQuery( 'SELECT version FROM product_component_version WHERE UPPER(product) LIKE \'ORACLE DATABASE%\'' );
 906                 if ( !( $row =  $rset->fetchRow() ) ) {
 907                         return oci_server_version( $this->mConn );
 908                 }
 909                 return $row['version'];
 910         }
 911
 912         /**
 913          * Query whether a given table exists (in the given schema, or the default mw one if not given)
 914          */
 915         function tableExists( $table ) {
 916                 $table = trim($this->tableName($table), '"');
 917                 $SQL = "SELECT 1 FROM user_tables WHERE table_name='$table'";
 918                 $res = $this->doQuery( $SQL );
 919                 if ( $res ) {
 920                         $count = $res->numRows();
 921                         $res->free();
 922                 } else {
 923                         $count = 0;
 924                 }
 925                 return $count;
 926         }
 927
 928         /**
 929          * Function translates mysql_fetch_field() functionality on ORACLE.
 930          * Caching is present for reducing query time.
 931          * For internal calls. Use fieldInfo for normal usage.
 932          * Returns false if the field doesn't exist
 933          *
 934          * @param $table Array
 935          * @param $field String
 936          * @return ORAField
 937          */
 938         private function fieldInfoMulti( $table, $field ) {
 939                 $field = strtoupper( $field );
 940                 if ( is_array( $table ) ) {
 941                         $table = array_map( array( &$this, 'tableName' ), $table );
 942                         $tableWhere = 'IN (';
 943                         foreach( $table as &$singleTable ) {
 944                                 $singleTable = strtoupper( trim( $singleTable, '"' ) );
 945                                 if ( isset( $this->mFieldInfoCache["$singleTable.$field"] ) ) {
 946                                         return $this->mFieldInfoCache["$singleTable.$field"];
 947                                 }
 948                                 $tableWhere .= '\'' . $singleTable . '\',';
 949                         }
 950                         $tableWhere = rtrim( $tableWhere, ',' ) . ')';
 951                 } else {
 952                         $table = strtoupper( trim( $this->tableName( $table ), '"' ) );
 953                         if ( isset( $this->mFieldInfoCache["$table.$field"] ) ) {
 954                                 return $this->mFieldInfoCache["$table.$field"];
 955                         }
 956                         $tableWhere = '= \''.$table.'\'';
 957                 }
 958
 959                 $fieldInfoStmt = oci_parse( $this->mConn, 'SELECT * FROM wiki_field_info_full WHERE table_name '.$tableWhere.' and column_name = \''.$field.'\'' );
 960                 if ( oci_execute( $fieldInfoStmt, OCI_DEFAULT ) === false ) {
 961                         $e = oci_error( $fieldInfoStmt );
 962                         $this->reportQueryError( $e['message'], $e['code'], 'fieldInfo QUERY', __METHOD__ );
 963                         return false;
 964                 }
 965                 $res = new ORAResult( $this, $fieldInfoStmt );
 966                 if ( $res->numRows() == 0 ) {
 967                         if ( is_array( $table ) ) {
 968                                 foreach( $table as &$singleTable ) {
 969                                         $this->mFieldInfoCache["$singleTable.$field"] = false;
 970                                 }
 971                         } else {
 972                                 $this->mFieldInfoCache["$table.$field"] = false;
 973                         }
 974                         $fieldInfoTemp = null;
 975                 } else {
 976                         $fieldInfoTemp = new ORAField( $res->fetchRow() );
 977                         $table = $fieldInfoTemp->tableName();
 978                         $this->mFieldInfoCache["$table.$field"] = $fieldInfoTemp;
 979                 }
 980                 $res->free();
 981                 return $fieldInfoTemp;
 982         }
 983
 984         /**
 985          * @throws DBUnexpectedError
 986          * @param  $table
 987          * @param  $field
 988          * @return ORAField
 989          */
 990         function fieldInfo( $table, $field ) {
 991                 if ( is_array( $table ) ) {
 992                         throw new DBUnexpectedError( $this, 'DatabaseOracle::fieldInfo called with table array!' );
 993                 }
 994                 return $this->fieldInfoMulti ($table, $field);
 995         }
 996
 997         function begin( $fname = '' ) {
 998                 $this->mTrxLevel = 1;
 999         }
1000
1001         function commit( $fname = '' ) {
1002                 oci_commit( $this->mConn );
1003                 $this->mTrxLevel = 0;
1004         }
1005
1006         /* Not even sure why this is used in the main codebase... */
1007         function limitResultForUpdate( $sql, $num ) {
1008                 return $sql;
1009         }
1010
1011         /* defines must comply with ^define\s*([^\s=]*)\s*=\s?'\{\$([^\}]*)\}'; */
1012         function sourceStream( $fp, $lineCallback = false, $resultCallback = false, $fname = 'DatabaseOracle::sourceStream' ) {
1013                 $cmd = '';
1014                 $done = false;
1015                 $dollarquote = false;
1016
1017                 $replacements = array();
1018
1019                 while ( ! feof( $fp ) ) {
1020                         if ( $lineCallback ) {
1021                                 call_user_func( $lineCallback );
1022                         }
1023                         $line = trim( fgets( $fp, 1024 ) );
1024                         $sl = strlen( $line ) - 1;
1025
1026                         if ( $sl < 0 ) {
1027                                 continue;
1028                         }
1029                         if ( '-' == $line { 0 } && '-' == $line { 1 } ) {
1030                                 continue;
1031                         }
1032
1033                         // Allow dollar quoting for function declarations
1034                         if ( substr( $line, 0, 8 ) == '/*$mw$*/' ) {
1035                                 if ( $dollarquote ) {
1036                                         $dollarquote = false;
1037                                         $line = str_replace( '/*$mw$*/', '', $line ); // remove dollarquotes
1038                                         $done = true;
1039                                 } else {
1040                                         $dollarquote = true;
1041                                 }
1042                         } elseif ( !$dollarquote ) {
1043                                 if ( ';' == $line { $sl } && ( $sl < 2 || ';' != $line { $sl - 1 } ) ) {
1044                                         $done = true;
1045                                         $line = substr( $line, 0, $sl );
1046                                 }
1047                         }
1048
1049                         if ( $cmd != '' ) {
1050                                 $cmd .= ' ';
1051                         }
1052                         $cmd .= "$line\n";
1053
1054                         if ( $done ) {
1055                                 $cmd = str_replace( ';;', ";", $cmd );
1056                                 if ( strtolower( substr( $cmd, 0, 6 ) ) == 'define' ) {
1057                                         if ( preg_match( '/^define\s*([^\s=]*)\s*=\s*\'\{\$([^\}]*)\}\'/', $cmd, $defines ) ) {
1058                                                 $replacements[$defines[2]] = $defines[1];
1059                                         }
1060                                 } else {
1061                                         foreach ( $replacements as $mwVar => $scVar ) {
1062                                                 $cmd = str_replace( '&' . $scVar . '.', '`{$' . $mwVar . '}`', $cmd );
1063                                         }
1064
1065                                         $cmd = $this->replaceVars( $cmd );
1066                                         $res = $this->doQuery( $cmd );
1067                                         if ( $resultCallback ) {
1068                                                 call_user_func( $resultCallback, $res, $this );
1069                                         }
1070
1071                                         if ( false === $res ) {
1072                                                 $err = $this->lastError();
1073                                                 return "Query \"{$cmd}\" failed with error code \"$err\".\n";
1074                                         }
1075                                 }
1076
1077                                 $cmd = '';
1078                                 $done = false;
1079                         }
1080                 }
1081                 return true;
1082         }
1083
1084         function selectDB( $db ) {
1085                 $this->mDBname = $db;
1086                 if ( $db == null || $db == $this->mUser ) {
1087                         return true;
1088                 }
1089                 $sql = 'ALTER SESSION SET CURRENT_SCHEMA=' . strtoupper($db);
1090                 $stmt = oci_parse( $this->mConn, $sql );
1091                 wfSuppressWarnings();
1092                 $success = oci_execute( $stmt );
1093                 wfRestoreWarnings();
1094                 if ( !$success ) {
1095                         $e = oci_error( $stmt );
1096                         if ( $e['code'] != '1435' ) {
1097                                 $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
1098                         }
1099                         return false;
1100                 }
1101                 return true;
1102         }
1103
1104         function strencode( $s ) {
1105                 return str_replace( "'", "''", $s );
1106         }
1107
1108         function addQuotes( $s ) {
1109                 global $wgContLang;
1110                 if ( isset( $wgContLang->mLoaded ) && $wgContLang->mLoaded ) {
1111                         $s = $wgContLang->checkTitleEncoding( $s );
1112                 }
1113                 return "'" . $this->strencode( $s ) . "'";
1114         }
1115
1116         public function addIdentifierQuotes( $s ) {
1117                 if ( !$this->mFlags & DBO_DDLMODE ) {
1118                         $s = '"' . str_replace( '"', '""', $s ) . '"';
1119                 }
1120                 return $s;
1121         }
1122
1123         function selectRow( $table, $vars, $conds, $fname = 'DatabaseOracle::selectRow', $options = array(), $join_conds = array() ) {
1124                 global $wgContLang;
1125
1126                 if ($conds != null) {
1127                         $conds2 = array();
1128                         $conds = ( !is_array( $conds ) ) ? array( $conds ) : $conds;
1129                         foreach ( $conds as $col => $val ) {
1130                                 $col_info = $this->fieldInfoMulti( $table, $col );
1131                                 $col_type = $col_info != false ? $col_info->type() : 'CONSTANT';
1132                                 if ( $col_type == 'CLOB' ) {
1133                                         $conds2['TO_CHAR(' . $col . ')'] = $wgContLang->checkTitleEncoding( $val );
1134                                 } elseif ( $col_type == 'VARCHAR2' && !mb_check_encoding( $val ) ) {
1135                                         $conds2[$col] = $wgContLang->checkTitleEncoding( $val );
1136                                 } else {
1137                                         $conds2[$col] = $val;
1138                                 }
1139                         }
1140
1141                         return parent::selectRow( $table, $vars, $conds2, $fname, $options, $join_conds );
1142                 } else {
1143                         return parent::selectRow( $table, $vars, $conds, $fname, $options, $join_conds );
1144                 }
1145         }
1146
1147         /**
1148          * Returns an optional USE INDEX clause to go after the table, and a
1149          * string to go at the end of the query
1150          *
1151          * @private
1152          *
1153          * @param $options Array: an associative array of options to be turned into
1154          *              an SQL query, valid keys are listed in the function.
1155          * @return array
1156          */
1157         function makeSelectOptions( $options ) {
1158                 $preLimitTail = $postLimitTail = '';
1159                 $startOpts = '';
1160
1161                 $noKeyOptions = array();
1162                 foreach ( $options as $key => $option ) {
1163                         if ( is_numeric( $key ) ) {
1164                                 $noKeyOptions[$option] = true;
1165                         }
1166                 }
1167
1168                 if ( isset( $options['GROUP BY'] ) ) {
1169                         $preLimitTail .= " GROUP BY {$options['GROUP BY']}";
1170                 }
1171                 if ( isset( $options['ORDER BY'] ) ) {
1172                         $preLimitTail .= " ORDER BY {$options['ORDER BY']}";
1173                 }
1174
1175                 # if ( isset( $noKeyOptions['FOR UPDATE'] ) ) $tailOpts .= ' FOR UPDATE';
1176                 # if ( isset( $noKeyOptions['LOCK IN SHARE MODE'] ) ) $tailOpts .= ' LOCK IN SHARE MODE';
1177                 if ( isset( $noKeyOptions['DISTINCT'] ) || isset( $noKeyOptions['DISTINCTROW'] ) ) {
1178                         $startOpts .= 'DISTINCT';
1179                 }
1180
1181                 if ( isset( $options['USE INDEX'] ) && ! is_array( $options['USE INDEX'] ) ) {
1182                         $useIndex = $this->useIndexClause( $options['USE INDEX'] );
1183                 } else {
1184                         $useIndex = '';
1185                 }
1186
1187                 return array( $startOpts, $useIndex, $preLimitTail, $postLimitTail );
1188         }
1189
1190         public function delete( $table, $conds, $fname = 'DatabaseOracle::delete' ) {
1191                 global $wgContLang;
1192
1193                 if ( $wgContLang != null && $conds != null && $conds != '*' ) {
1194                         $conds2 = array();
1195                         $conds = ( !is_array( $conds ) ) ? array( $conds ) : $conds;
1196                         foreach ( $conds as $col => $val ) {
1197                                 $col_info = $this->fieldInfoMulti( $table, $col );
1198                                 $col_type = $col_info != false ? $col_info->type() : 'CONSTANT';
1199                                 if ( $col_type == 'CLOB' ) {
1200                                         $conds2['TO_CHAR(' . $col . ')'] = $wgContLang->checkTitleEncoding( $val );
1201                                 } else {
1202                                         if ( is_array( $val ) ) {
1203                                                 $conds2[$col] = $val;
1204                                                 foreach ( $conds2[$col] as &$val2 ) {
1205                                                         $val2 = $wgContLang->checkTitleEncoding( $val2 );
1206                                                 }
1207                                         } else {
1208                                                 $conds2[$col] = $wgContLang->checkTitleEncoding( $val );
1209                                         }
1210                                 }
1211                         }
1212
1213                         return parent::delete( $table, $conds2, $fname );
1214                 } else {
1215                         return parent::delete( $table, $conds, $fname );
1216                 }
1217         }
1218
1219         function update( $table, $values, $conds, $fname = 'DatabaseOracle::update', $options = array() ) {
1220                 global $wgContLang;
1221
1222                 $table = $this->tableName( $table );
1223                 $opts = $this->makeUpdateOptions( $options );
1224                 $sql = "UPDATE $opts $table SET ";
1225
1226                 $first = true;
1227                 foreach ( $values as $col => &$val ) {
1228                         $sqlSet = $this->fieldBindStatement( $table, $col, $val, true );
1229
1230                         if ( !$first ) {
1231                                 $sqlSet = ', ' . $sqlSet;
1232                         } else {
1233                                 $first = false;
1234                         }
1235                         $sql .= $sqlSet;
1236                 }
1237
1238                 if ( $conds != '*' ) {
1239                         $sql .= ' WHERE ' . $this->makeList( $conds, LIST_AND );
1240                 }
1241
1242                 if ( ( $this->mLastResult = $stmt = oci_parse( $this->mConn, $sql ) ) === false ) {
1243                         $e = oci_error( $this->mConn );
1244                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
1245                         return false;
1246                 }
1247                 foreach ( $values as $col => &$val ) {
1248                         $col_info = $this->fieldInfoMulti( $table, $col );
1249                         $col_type = $col_info != false ? $col_info->type() : 'CONSTANT';
1250
1251                         if ( $val === null ) {
1252                                 // do nothing ... null was inserted in statement creation
1253                         } elseif ( $col_type != 'BLOB' && $col_type != 'CLOB' ) {
1254                                 if ( is_object( $val ) ) {
1255                                         $val = $val->getData();
1256                                 }
1257
1258                                 if ( preg_match( '/^timestamp.*/i', $col_type ) == 1 && strtolower( $val ) == 'infinity' ) {
1259                                         $val = '31-12-2030 12:00:00.000000';
1260                                 }
1261
1262                                 $val = ( $wgContLang != null ) ? $wgContLang->checkTitleEncoding( $val ) : $val;
1263                                 if ( oci_bind_by_name( $stmt, ":$col", $val ) === false ) {
1264                                         $e = oci_error( $stmt );
1265                                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
1266                                         return false;
1267                                 }
1268                         } else {
1269                                 if ( ( $lob[$col] = oci_new_descriptor( $this->mConn, OCI_D_LOB ) ) === false ) {
1270                                         $e = oci_error( $stmt );
1271                                         throw new DBUnexpectedError( $this, "Cannot create LOB descriptor: " . $e['message'] );
1272                                 }
1273
1274                                 if ( $col_type == 'BLOB' ) {
1275                                         $lob[$col]->writeTemporary( $val );
1276                                         oci_bind_by_name( $stmt, ":$col", $lob[$col], - 1, SQLT_BLOB );
1277                                 } else {
1278                                         $lob[$col]->writeTemporary( $val );
1279                                         oci_bind_by_name( $stmt, ":$col", $lob[$col], - 1, OCI_B_CLOB );
1280                                 }
1281                         }
1282                 }
1283
1284                 wfSuppressWarnings();
1285
1286                 if ( oci_execute( $stmt, OCI_DEFAULT ) === false ) {
1287                         $e = oci_error( $stmt );
1288                         if ( !$this->ignore_DUP_VAL_ON_INDEX || $e['code'] != '1' ) {
1289                                 $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
1290                                 return false;
1291                         } else {
1292                                 $this->mAffectedRows = oci_num_rows( $stmt );
1293                         }
1294                 } else {
1295                         $this->mAffectedRows = oci_num_rows( $stmt );
1296                 }
1297
1298                 wfRestoreWarnings();
1299
1300                 if ( isset( $lob ) ) {
1301                         foreach ( $lob as $lob_v ) {
1302                                 $lob_v->free();
1303                         }
1304                 }
1305
1306                 if ( !$this->mTrxLevel ) {
1307                         oci_commit( $this->mConn );
1308                 }
1309
1310                 oci_free_statement( $stmt );
1311         }
1312
1313         function bitNot( $field ) {
1314                 // expecting bit-fields smaller than 4bytes
1315                 return 'BITNOT(' . $field . ')';
1316         }
1317
1318         function bitAnd( $fieldLeft, $fieldRight ) {
1319                 return 'BITAND(' . $fieldLeft . ', ' . $fieldRight . ')';
1320         }
1321
1322         function bitOr( $fieldLeft, $fieldRight ) {
1323                 return 'BITOR(' . $fieldLeft . ', ' . $fieldRight . ')';
1324         }
1325
1326         function setFakeMaster( $enabled = true ) { }
1327
1328         function getDBname() {
1329                 return $this->mDBname;
1330         }
1331
1332         function getServer() {
1333                 return $this->mServer;
1334         }
1335
1336         public function getSearchEngine() {
1337                 return 'SearchOracle';
1338         }
1339 } // end DatabaseOracle class