includes/db/DatabaseOracle.php

   1 <?php
   2 /**
   3  * This is the Oracle database abstraction layer.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup Database
  22  */
  23
  24 /**
  25  * The oci8 extension is fairly weak and doesn't support oci_num_rows, among
  26  * other things. We use a wrapper class to handle that and other
  27  * Oracle-specific bits, like converting column names back to lowercase.
  28  * @ingroup Database
  29  */
  30 class ORAResult {
  31         private $rows;
  32         private $cursor;
  33         private $nrows;
  34
  35         private $columns = array();
  36
  37         private function array_unique_md( $array_in ) {
  38                 $array_out = array();
  39                 $array_hashes = array();
  40
  41                 foreach ( $array_in as $item ) {
  42                         $hash = md5( serialize( $item ) );
  43                         if ( !isset( $array_hashes[$hash] ) ) {
  44                                 $array_hashes[$hash] = $hash;
  45                                 $array_out[] = $item;
  46                         }
  47                 }
  48
  49                 return $array_out;
  50         }
  51
  52         /**
  53          * @param $db DatabaseBase
  54          * @param $stmt
  55          * @param bool $unique
  56          */
  57         function __construct( &$db, $stmt, $unique = false ) {
  58                 $this->db =& $db;
  59
  60                 if ( ( $this->nrows = oci_fetch_all( $stmt, $this->rows, 0, - 1, OCI_FETCHSTATEMENT_BY_ROW | OCI_NUM ) ) === false ) {
  61                         $e = oci_error( $stmt );
  62                         $db->reportQueryError( $e['message'], $e['code'], '', __METHOD__ );
  63                         $this->free();
  64                         return;
  65                 }
  66
  67                 if ( $unique ) {
  68                         $this->rows = $this->array_unique_md( $this->rows );
  69                         $this->nrows = count( $this->rows );
  70                 }
  71
  72                 if ( $this->nrows > 0 ) {
  73                         foreach ( $this->rows[0] as $k => $v ) {
  74                                 $this->columns[$k] = strtolower( oci_field_name( $stmt, $k + 1 ) );
  75                         }
  76                 }
  77
  78                 $this->cursor = 0;
  79                 oci_free_statement( $stmt );
  80         }
  81
  82         public function free() {
  83                 unset( $this->db );
  84         }
  85
  86         public function seek( $row ) {
  87                 $this->cursor = min( $row, $this->nrows );
  88         }
  89
  90         public function numRows() {
  91                 return $this->nrows;
  92         }
  93
  94         public function numFields() {
  95                 return count( $this->columns );
  96         }
  97
  98         public function fetchObject() {
  99                 if ( $this->cursor >= $this->nrows ) {
 100                         return false;
 101                 }
 102                 $row = $this->rows[$this->cursor++];
 103                 $ret = new stdClass();
 104                 foreach ( $row as $k => $v ) {
 105                         $lc = $this->columns[$k];
 106                         $ret->$lc = $v;
 107                 }
 108
 109                 return $ret;
 110         }
 111
 112         public function fetchRow() {
 113                 if ( $this->cursor >= $this->nrows ) {
 114                         return false;
 115                 }
 116
 117                 $row = $this->rows[$this->cursor++];
 118                 $ret = array();
 119                 foreach ( $row as $k => $v ) {
 120                         $lc = $this->columns[$k];
 121                         $ret[$lc] = $v;
 122                         $ret[$k] = $v;
 123                 }
 124                 return $ret;
 125         }
 126 }
 127
 128 /**
 129  * Utility class.
 130  * @ingroup Database
 131  */
 132 class ORAField implements Field {
 133         private $name, $tablename, $default, $max_length, $nullable,
 134                 $is_pk, $is_unique, $is_multiple, $is_key, $type;
 135
 136         function __construct( $info ) {
 137                 $this->name = $info['column_name'];
 138                 $this->tablename = $info['table_name'];
 139                 $this->default = $info['data_default'];
 140                 $this->max_length = $info['data_length'];
 141                 $this->nullable = $info['not_null'];
 142                 $this->is_pk = isset( $info['prim'] ) && $info['prim'] == 1 ? 1 : 0;
 143                 $this->is_unique = isset( $info['uniq'] ) && $info['uniq'] == 1 ? 1 : 0;
 144                 $this->is_multiple = isset( $info['nonuniq'] ) && $info['nonuniq'] == 1 ? 1 : 0;
 145                 $this->is_key = ( $this->is_pk || $this->is_unique || $this->is_multiple );
 146                 $this->type = $info['data_type'];
 147         }
 148
 149         function name() {
 150                 return $this->name;
 151         }
 152
 153         function tableName() {
 154                 return $this->tablename;
 155         }
 156
 157         function defaultValue() {
 158                 return $this->default;
 159         }
 160
 161         function maxLength() {
 162                 return $this->max_length;
 163         }
 164
 165         function isNullable() {
 166                 return $this->nullable;
 167         }
 168
 169         function isKey() {
 170                 return $this->is_key;
 171         }
 172
 173         function isMultipleKey() {
 174                 return $this->is_multiple;
 175         }
 176
 177         function type() {
 178                 return $this->type;
 179         }
 180 }
 181
 182 /**
 183  * @ingroup Database
 184  */
 185 class DatabaseOracle extends DatabaseBase {
 186         var $mInsertId = null;
 187         var $mLastResult = null;
 188         var $lastResult = null;
 189         var $cursor = 0;
 190         var $mAffectedRows;
 191
 192         var $ignore_DUP_VAL_ON_INDEX = false;
 193         var $sequenceData = null;
 194
 195         var $defaultCharset = 'AL32UTF8';
 196
 197         var $mFieldInfoCache = array();
 198
 199         function __construct( $p = null ) {
 200                 global $wgDBprefix;
 201
 202                 if ( !is_array( $p ) ) { // legacy calling pattern
 203                         wfDeprecated( __METHOD__ . " method called without parameter array.", "1.22" );
 204                         $args = func_get_args();
 205                         $p = array(
 206                                 'host' => isset( $args[0] ) ? $args[0] : false,
 207                                 'user' => isset( $args[1] ) ? $args[1] : false,
 208                                 'password' => isset( $args[2] ) ? $args[2] : false,
 209                                 'dbname' => isset( $args[3] ) ? $args[3] : false,
 210                                 'flags' => isset( $args[4] ) ? $args[4] : 0,
 211                                 'tablePrefix' => isset( $args[5] ) ? $args[5] : 'get from global',
 212                                 'foreign' => isset( $args[6] ) ? $args[6] : false
 213                         );
 214                 }
 215                 if ( $p['tablePrefix'] == 'get from global' ) {
 216                         $p['tablePrefix'] = $wgDBprefix;
 217                 }
 218                 $p['tablePrefix'] = strtoupper( $p['tablePrefix'] );
 219                 parent::__construct( $p );
 220                 wfRunHooks( 'DatabaseOraclePostInit', array( $this ) );
 221         }
 222
 223         function __destruct() {
 224                 if ( $this->mOpened ) {
 225                         wfSuppressWarnings();
 226                         $this->close();
 227                         wfRestoreWarnings();
 228                 }
 229         }
 230
 231         function getType() {
 232                 return 'oracle';
 233         }
 234
 235         function cascadingDeletes() {
 236                 return true;
 237         }
 238         function cleanupTriggers() {
 239                 return true;
 240         }
 241         function strictIPs() {
 242                 return true;
 243         }
 244         function realTimestamps() {
 245                 return true;
 246         }
 247         function implicitGroupby() {
 248                 return false;
 249         }
 250         function implicitOrderby() {
 251                 return false;
 252         }
 253         function searchableIPs() {
 254                 return true;
 255         }
 256
 257         /**
 258          * Usually aborts on failure
 259          * @param string $server
 260          * @param string $user
 261          * @param string $password
 262          * @param string $dbName
 263          * @throws DBConnectionError
 264          * @return DatabaseBase|null
 265          */
 266         function open( $server, $user, $password, $dbName ) {
 267                 global $wgDBOracleDRCP;
 268                 if ( !function_exists( 'oci_connect' ) ) {
 269                         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" );
 270                 }
 271
 272                 $this->close();
 273                 $this->mUser = $user;
 274                 $this->mPassword = $password;
 275                 // changed internal variables functions
 276                 // mServer now holds the TNS endpoint
 277                 // mDBname is schema name if different from username
 278                 if ( !$server ) {
 279                         // backward compatibillity (server used to be null and TNS was supplied in dbname)
 280                         $this->mServer = $dbName;
 281                         $this->mDBname = $user;
 282                 } else {
 283                         $this->mServer = $server;
 284                         if ( !$dbName ) {
 285                                 $this->mDBname = $user;
 286                         } else {
 287                                 $this->mDBname = $dbName;
 288                         }
 289                 }
 290
 291                 if ( !strlen( $user ) ) { # e.g. the class is being loaded
 292                         return;
 293                 }
 294
 295                 if ( $wgDBOracleDRCP ) {
 296                         $this->setFlag( DBO_PERSISTENT );
 297                 }
 298
 299                 $session_mode = $this->mFlags & DBO_SYSDBA ? OCI_SYSDBA : OCI_DEFAULT;
 300
 301                 wfSuppressWarnings();
 302                 if ( $this->mFlags & DBO_PERSISTENT ) {
 303                         $this->mConn = oci_pconnect( $this->mUser, $this->mPassword, $this->mServer, $this->defaultCharset, $session_mode );
 304                 } elseif ( $this->mFlags & DBO_DEFAULT ) {
 305                         $this->mConn = oci_new_connect( $this->mUser, $this->mPassword, $this->mServer, $this->defaultCharset, $session_mode );
 306                 } else {
 307                         $this->mConn = oci_connect( $this->mUser, $this->mPassword, $this->mServer, $this->defaultCharset, $session_mode );
 308                 }
 309                 wfRestoreWarnings();
 310
 311                 if ( $this->mUser != $this->mDBname ) {
 312                         //change current schema in session
 313                         $this->selectDB( $this->mDBname );
 314                 }
 315
 316                 if ( !$this->mConn ) {
 317                         throw new DBConnectionError( $this, $this->lastError() );
 318                 }
 319
 320                 $this->mOpened = true;
 321
 322                 # removed putenv calls because they interfere with the system globaly
 323                 $this->doQuery( 'ALTER SESSION SET NLS_TIMESTAMP_FORMAT=\'DD-MM-YYYY HH24:MI:SS.FF6\'' );
 324                 $this->doQuery( 'ALTER SESSION SET NLS_TIMESTAMP_TZ_FORMAT=\'DD-MM-YYYY HH24:MI:SS.FF6\'' );
 325                 $this->doQuery( 'ALTER SESSION SET NLS_NUMERIC_CHARACTERS=\'.,\'' );
 326                 return $this->mConn;
 327         }
 328
 329         /**
 330          * Closes a database connection, if it is open
 331          * Returns success, true if already closed
 332          * @return bool
 333          */
 334         protected function closeConnection() {
 335                 return oci_close( $this->mConn );
 336         }
 337
 338         function execFlags() {
 339                 return $this->mTrxLevel ? OCI_NO_AUTO_COMMIT : OCI_COMMIT_ON_SUCCESS;
 340         }
 341
 342         protected function doQuery( $sql ) {
 343                 wfDebug( "SQL: [$sql]\n" );
 344                 if ( !StringUtils::isUtf8( $sql ) ) {
 345                         throw new MWException( "SQL encoding is invalid\n$sql" );
 346                 }
 347
 348                 // handle some oracle specifics
 349                 // remove AS column/table/subquery namings
 350                 if ( !$this->getFlag( DBO_DDLMODE ) ) {
 351                         $sql = preg_replace( '/ as /i', ' ', $sql );
 352                 }
 353
 354                 // Oracle has issues with UNION clause if the statement includes LOB fields
 355                 // So we do a UNION ALL and then filter the results array with array_unique
 356                 $union_unique = ( preg_match( '/\/\* UNION_UNIQUE \*\/ /', $sql ) != 0 );
 357                 // EXPLAIN syntax in Oracle is EXPLAIN PLAN FOR and it return nothing
 358                 // you have to select data from plan table after explain
 359                 $explain_id = MWTimestamp::getLocalInstance()->format( 'dmYHis' );
 360
 361                 $sql = preg_replace( '/^EXPLAIN /', 'EXPLAIN PLAN SET STATEMENT_ID = \'' . $explain_id . '\' FOR', $sql, 1, $explain_count );
 362
 363                 wfSuppressWarnings();
 364
 365                 if ( ( $this->mLastResult = $stmt = oci_parse( $this->mConn, $sql ) ) === false ) {
 366                         $e = oci_error( $this->mConn );
 367                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 368                         return false;
 369                 }
 370
 371                 if ( !oci_execute( $stmt, $this->execFlags() ) ) {
 372                         $e = oci_error( $stmt );
 373                         if ( !$this->ignore_DUP_VAL_ON_INDEX || $e['code'] != '1' ) {
 374                                 $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 375                                 return false;
 376                         }
 377                 }
 378
 379                 wfRestoreWarnings();
 380
 381                 if ( $explain_count > 0 ) {
 382                         return $this->doQuery( 'SELECT id, cardinality "ROWS" FROM plan_table WHERE statement_id = \'' . $explain_id . '\'' );
 383                 } elseif ( oci_statement_type( $stmt ) == 'SELECT' ) {
 384                         return new ORAResult( $this, $stmt, $union_unique );
 385                 } else {
 386                         $this->mAffectedRows = oci_num_rows( $stmt );
 387                         return true;
 388                 }
 389         }
 390
 391         function queryIgnore( $sql, $fname = '' ) {
 392                 return $this->query( $sql, $fname, true );
 393         }
 394
 395         function freeResult( $res ) {
 396                 if ( $res instanceof ResultWrapper ) {
 397                         $res = $res->result;
 398                 }
 399
 400                 $res->free();
 401         }
 402
 403         function fetchObject( $res ) {
 404                 if ( $res instanceof ResultWrapper ) {
 405                         $res = $res->result;
 406                 }
 407
 408                 return $res->fetchObject();
 409         }
 410
 411         function fetchRow( $res ) {
 412                 if ( $res instanceof ResultWrapper ) {
 413                         $res = $res->result;
 414                 }
 415
 416                 return $res->fetchRow();
 417         }
 418
 419         function numRows( $res ) {
 420                 if ( $res instanceof ResultWrapper ) {
 421                         $res = $res->result;
 422                 }
 423
 424                 return $res->numRows();
 425         }
 426
 427         function numFields( $res ) {
 428                 if ( $res instanceof ResultWrapper ) {
 429                         $res = $res->result;
 430                 }
 431
 432                 return $res->numFields();
 433         }
 434
 435         function fieldName( $stmt, $n ) {
 436                 return oci_field_name( $stmt, $n );
 437         }
 438
 439         /**
 440          * This must be called after nextSequenceVal
 441          * @return null
 442          */
 443         function insertId() {
 444                 return $this->mInsertId;
 445         }
 446
 447         function dataSeek( $res, $row ) {
 448                 if ( $res instanceof ORAResult ) {
 449                         $res->seek( $row );
 450                 } else {
 451                         $res->result->seek( $row );
 452                 }
 453         }
 454
 455         function lastError() {
 456                 if ( $this->mConn === false ) {
 457                         $e = oci_error();
 458                 } else {
 459                         $e = oci_error( $this->mConn );
 460                 }
 461                 return $e['message'];
 462         }
 463
 464         function lastErrno() {
 465                 if ( $this->mConn === false ) {
 466                         $e = oci_error();
 467                 } else {
 468                         $e = oci_error( $this->mConn );
 469                 }
 470                 return $e['code'];
 471         }
 472
 473         function affectedRows() {
 474                 return $this->mAffectedRows;
 475         }
 476
 477         /**
 478          * Returns information about an index
 479          * If errors are explicitly ignored, returns NULL on failure
 480          * @return bool
 481          */
 482         function indexInfo( $table, $index, $fname = __METHOD__ ) {
 483                 return false;
 484         }
 485
 486         function indexUnique( $table, $index, $fname = __METHOD__ ) {
 487                 return false;
 488         }
 489
 490         function insert( $table, $a, $fname = __METHOD__, $options = array() ) {
 491                 if ( !count( $a ) ) {
 492                         return true;
 493                 }
 494
 495                 if ( !is_array( $options ) ) {
 496                         $options = array( $options );
 497                 }
 498
 499                 if ( in_array( 'IGNORE', $options ) ) {
 500                         $this->ignore_DUP_VAL_ON_INDEX = true;
 501                 }
 502
 503                 if ( !is_array( reset( $a ) ) ) {
 504                         $a = array( $a );
 505                 }
 506
 507                 foreach ( $a as &$row ) {
 508                         $this->insertOneRow( $table, $row, $fname );
 509                 }
 510                 $retVal = true;
 511
 512                 if ( in_array( 'IGNORE', $options ) ) {
 513                         $this->ignore_DUP_VAL_ON_INDEX = false;
 514                 }
 515
 516                 return $retVal;
 517         }
 518
 519         private function fieldBindStatement( $table, $col, &$val, $includeCol = false ) {
 520                 $col_info = $this->fieldInfoMulti( $table, $col );
 521                 $col_type = $col_info != false ? $col_info->type() : 'CONSTANT';
 522
 523                 $bind = '';
 524                 if ( is_numeric( $col ) ) {
 525                         $bind = $val;
 526                         $val = null;
 527                         return $bind;
 528                 } elseif ( $includeCol ) {
 529                         $bind = "$col = ";
 530                 }
 531
 532                 if ( $val == '' && $val !== 0 && $col_type != 'BLOB' && $col_type != 'CLOB' ) {
 533                         $val = null;
 534                 }
 535
 536                 if ( $val === 'NULL' ) {
 537                         $val = null;
 538                 }
 539
 540                 if ( $val === null ) {
 541                         if ( $col_info != false && $col_info->isNullable() == 0 && $col_info->defaultValue() != null ) {
 542                                 $bind .= 'DEFAULT';
 543                         } else {
 544                                 $bind .= 'NULL';
 545                         }
 546                 } else {
 547                         $bind .= ':' . $col;
 548                 }
 549
 550                 return $bind;
 551         }
 552
 553         private function insertOneRow( $table, $row, $fname ) {
 554                 global $wgContLang;
 555
 556                 $table = $this->tableName( $table );
 557                 // "INSERT INTO tables (a, b, c)"
 558                 $sql = "INSERT INTO " . $table . " (" . join( ',', array_keys( $row ) ) . ')';
 559                 $sql .= " VALUES (";
 560
 561                 // for each value, append ":key"
 562                 $first = true;
 563                 foreach ( $row as $col => &$val ) {
 564                         if ( !$first ) {
 565                                 $sql .= ', ';
 566                         } else {
 567                                 $first = false;
 568                         }
 569
 570                         $sql .= $this->fieldBindStatement( $table, $col, $val );
 571                 }
 572                 $sql .= ')';
 573
 574                 if ( ( $this->mLastResult = $stmt = oci_parse( $this->mConn, $sql ) ) === false ) {
 575                         $e = oci_error( $this->mConn );
 576                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 577                         return false;
 578                 }
 579                 foreach ( $row as $col => &$val ) {
 580                         $col_info = $this->fieldInfoMulti( $table, $col );
 581                         $col_type = $col_info != false ? $col_info->type() : 'CONSTANT';
 582
 583                         if ( $val === null ) {
 584                                 // do nothing ... null was inserted in statement creation
 585                         } elseif ( $col_type != 'BLOB' && $col_type != 'CLOB' ) {
 586                                 if ( is_object( $val ) ) {
 587                                         $val = $val->fetch();
 588                                 }
 589
 590                                 // backward compatibility
 591                                 if ( preg_match( '/^timestamp.*/i', $col_type ) == 1 && strtolower( $val ) == 'infinity' ) {
 592                                         $val = $this->getInfinity();
 593                                 }
 594
 595                                 $val = ( $wgContLang != null ) ? $wgContLang->checkTitleEncoding( $val ) : $val;
 596                                 if ( oci_bind_by_name( $stmt, ":$col", $val, -1, SQLT_CHR ) === false ) {
 597                                         $e = oci_error( $stmt );
 598                                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 599                                         return false;
 600                                 }
 601                         } else {
 602                                 if ( ( $lob[$col] = oci_new_descriptor( $this->mConn, OCI_D_LOB ) ) === false ) {
 603                                         $e = oci_error( $stmt );
 604                                         throw new DBUnexpectedError( $this, "Cannot create LOB descriptor: " . $e['message'] );
 605                                 }
 606
 607                                 if ( is_object( $val ) ) {
 608                                         $val = $val->fetch();
 609                                 }
 610
 611                                 if ( $col_type == 'BLOB' ) {
 612                                         $lob[$col]->writeTemporary( $val, OCI_TEMP_BLOB );
 613                                         oci_bind_by_name( $stmt, ":$col", $lob[$col], - 1, OCI_B_BLOB );
 614                                 } else {
 615                                         $lob[$col]->writeTemporary( $val, OCI_TEMP_CLOB );
 616                                         oci_bind_by_name( $stmt, ":$col", $lob[$col], - 1, OCI_B_CLOB );
 617                                 }
 618                         }
 619                 }
 620
 621                 wfSuppressWarnings();
 622
 623                 if ( oci_execute( $stmt, $this->execFlags() ) === false ) {
 624                         $e = oci_error( $stmt );
 625                         if ( !$this->ignore_DUP_VAL_ON_INDEX || $e['code'] != '1' ) {
 626                                 $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
 627                                 return false;
 628                         } else {
 629                                 $this->mAffectedRows = oci_num_rows( $stmt );
 630                         }
 631                 } else {
 632                         $this->mAffectedRows = oci_num_rows( $stmt );
 633                 }
 634
 635                 wfRestoreWarnings();
 636
 637                 if ( isset( $lob ) ) {
 638                         foreach ( $lob as $lob_v ) {
 639                                 $lob_v->free();
 640                         }
 641                 }
 642
 643                 if ( !$this->mTrxLevel ) {
 644                         oci_commit( $this->mConn );
 645                 }
 646
 647                 oci_free_statement( $stmt );
 648         }
 649
 650         function insertSelect( $destTable, $srcTable, $varMap, $conds, $fname = __METHOD__,
 651                 $insertOptions = array(), $selectOptions = array() )
 652         {
 653                 $destTable = $this->tableName( $destTable );
 654                 if ( !is_array( $selectOptions ) ) {
 655                         $selectOptions = array( $selectOptions );
 656                 }
 657                 list( $startOpts, $useIndex, $tailOpts ) = $this->makeSelectOptions( $selectOptions );
 658                 if ( is_array( $srcTable ) ) {
 659                         $srcTable = implode( ',', array_map( array( &$this, 'tableName' ), $srcTable ) );
 660                 } else {
 661                         $srcTable = $this->tableName( $srcTable );
 662                 }
 663
 664                 if ( ( $sequenceData = $this->getSequenceData( $destTable ) ) !== false &&
 665                                 !isset( $varMap[$sequenceData['column']] ) )
 666                 {
 667                         $varMap[$sequenceData['column']] = 'GET_SEQUENCE_VALUE(\'' . $sequenceData['sequence'] . '\')';
 668                 }
 669
 670                 // count-alias subselect fields to avoid abigious definition errors
 671                 $i = 0;
 672                 foreach ( $varMap as &$val ) {
 673                         $val = $val . ' field' . ( $i++ );
 674                 }
 675
 676                 $sql = "INSERT INTO $destTable (" . implode( ',', array_keys( $varMap ) ) . ')' .
 677                         " SELECT $startOpts " . implode( ',', $varMap ) .
 678                         " FROM $srcTable $useIndex ";
 679                 if ( $conds != '*' ) {
 680                         $sql .= ' WHERE ' . $this->makeList( $conds, LIST_AND );
 681                 }
 682                 $sql .= " $tailOpts";
 683
 684                 if ( in_array( 'IGNORE', $insertOptions ) ) {
 685                         $this->ignore_DUP_VAL_ON_INDEX = true;
 686                 }
 687
 688                 $retval = $this->query( $sql, $fname );
 689
 690                 if ( in_array( 'IGNORE', $insertOptions ) ) {
 691                         $this->ignore_DUP_VAL_ON_INDEX = false;
 692                 }
 693
 694                 return $retval;
 695         }
 696
 697         function tableName( $name, $format = 'quoted' ) {
 698                 /*
 699                 Replace reserved words with better ones
 700                 Using uppercase because that's the only way Oracle can handle
 701                 quoted tablenames
 702                 */
 703                 switch ( $name ) {
 704                         case 'user':
 705                                 $name = 'MWUSER';
 706                                 break;
 707                         case 'text':
 708                                 $name = 'PAGECONTENT';
 709                                 break;
 710                 }
 711
 712                 return strtoupper( parent::tableName( $name, $format ) );
 713         }
 714
 715         function tableNameInternal( $name ) {
 716                 $name = $this->tableName( $name );
 717                 return preg_replace( '/.*\.(.*)/', '$1', $name );
 718         }
 719         /**
 720          * Return the next in a sequence, save the value for retrieval via insertId()
 721          * @return null
 722          */
 723         function nextSequenceValue( $seqName ) {
 724                 $res = $this->query( "SELECT $seqName.nextval FROM dual" );
 725                 $row = $this->fetchRow( $res );
 726                 $this->mInsertId = $row[0];
 727                 return $this->mInsertId;
 728         }
 729
 730         /**
 731          * Return sequence_name if table has a sequence
 732          * @return bool
 733          */
 734         private function getSequenceData( $table ) {
 735                 if ( $this->sequenceData == null ) {
 736                         $result = $this->doQuery( "SELECT lower(asq.sequence_name),
 737                                    lower(atc.table_name),
 738                                    lower(atc.column_name)
 739                           FROM all_sequences asq, all_tab_columns atc
 740                          WHERE decode(atc.table_name, '{$this->mTablePrefix}MWUSER', '{$this->mTablePrefix}USER', atc.table_name) || '_' ||
 741                                    atc.column_name || '_SEQ' = '{$this->mTablePrefix}' || asq.sequence_name
 742                            AND asq.sequence_owner = upper('{$this->mDBname}')
 743                            AND atc.owner = upper('{$this->mDBname}')" );
 744
 745                         while ( ( $row = $result->fetchRow() ) !== false ) {
 746                                 $this->sequenceData[$row[1]] = array(
 747                                         'sequence' => $row[0],
 748                                         'column' => $row[2]
 749                                 );
 750                         }
 751                 }
 752                 $table = strtolower( $this->removeIdentifierQuotes( $this->tableName( $table ) ) );
 753                 return ( isset( $this->sequenceData[$table] ) ) ? $this->sequenceData[$table] : false;
 754         }
 755
 756         # Returns the size of a text field, or -1 for "unlimited"
 757         function textFieldSize( $table, $field ) {
 758                 $fieldInfoData = $this->fieldInfo( $table, $field );
 759                 return $fieldInfoData->maxLength();
 760         }
 761
 762         function limitResult( $sql, $limit, $offset = false ) {
 763                 if ( $offset === false ) {
 764                         $offset = 0;
 765                 }
 766                 return "SELECT * FROM ($sql) WHERE rownum >= (1 + $offset) AND rownum < (1 + $limit + $offset)";
 767         }
 768
 769         function encodeBlob( $b ) {
 770                 return new Blob( $b );
 771         }
 772
 773         function decodeBlob( $b ) {
 774                 if ( $b instanceof Blob ) {
 775                         $b = $b->fetch();
 776                 }
 777                 return $b;
 778         }
 779
 780         function unionQueries( $sqls, $all ) {
 781                 $glue = ' UNION ALL ';
 782                 return 'SELECT * ' . ( $all ? '' : '/* UNION_UNIQUE */ ' ) . 'FROM (' . implode( $glue, $sqls ) . ')';
 783         }
 784
 785         function wasDeadlock() {
 786                 return $this->lastErrno() == 'OCI-00060';
 787         }
 788
 789         function duplicateTableStructure( $oldName, $newName, $temporary = false, $fname = __METHOD__ ) {
 790                 $temporary = $temporary ? 'TRUE' : 'FALSE';
 791
 792                 $newName = strtoupper( $newName );
 793                 $oldName = strtoupper( $oldName );
 794
 795                 $tabName = substr( $newName, strlen( $this->mTablePrefix ) );
 796                 $oldPrefix = substr( $oldName, 0, strlen( $oldName ) - strlen( $tabName ) );
 797                 $newPrefix = strtoupper( $this->mTablePrefix );
 798
 799                 return $this->doQuery( "BEGIN DUPLICATE_TABLE( '$tabName', '$oldPrefix', '$newPrefix', $temporary ); END;" );
 800         }
 801
 802         function listTables( $prefix = null, $fname = __METHOD__ ) {
 803                 $listWhere = '';
 804                 if ( !empty( $prefix ) ) {
 805                         $listWhere = ' AND table_name LIKE \'' . strtoupper( $prefix ) . '%\'';
 806                 }
 807
 808                 $owner = strtoupper( $this->mDBname );
 809                 $result = $this->doQuery( "SELECT table_name FROM all_tables WHERE owner='$owner' AND table_name NOT LIKE '%!_IDX\$_' ESCAPE '!' $listWhere" );
 810
 811                 // dirty code ... i know
 812                 $endArray = array();
 813                 $endArray[] = strtoupper( $prefix . 'MWUSER' );
 814                 $endArray[] = strtoupper( $prefix . 'PAGE' );
 815                 $endArray[] = strtoupper( $prefix . 'IMAGE' );
 816                 $fixedOrderTabs = $endArray;
 817                 while ( ( $row = $result->fetchRow() ) !== false ) {
 818                         if ( !in_array( $row['table_name'], $fixedOrderTabs ) ) {
 819                                 $endArray[] = $row['table_name'];
 820                         }
 821                 }
 822
 823                 return $endArray;
 824         }
 825
 826         public function dropTable( $tableName, $fName = __METHOD__ ) {
 827                 $tableName = $this->tableName( $tableName );
 828                 if ( !$this->tableExists( $tableName ) ) {
 829                         return false;
 830                 }
 831
 832                 return $this->doQuery( "DROP TABLE $tableName CASCADE CONSTRAINTS PURGE" );
 833         }
 834
 835         function timestamp( $ts = 0 ) {
 836                 return wfTimestamp( TS_ORACLE, $ts );
 837         }
 838
 839         /**
 840          * Return aggregated value function call
 841          */
 842         public function aggregateValue( $valuedata, $valuename = 'value' ) {
 843                 return $valuedata;
 844         }
 845
 846         function reportQueryError( $error, $errno, $sql, $fname, $tempIgnore = false ) {
 847                 # Ignore errors during error handling to avoid infinite
 848                 # recursion
 849                 $ignore = $this->ignoreErrors( true );
 850                 ++$this->mErrorCount;
 851
 852                 if ( $ignore || $tempIgnore ) {
 853                         wfDebug( "SQL ERROR (ignored): $error\n" );
 854                         $this->ignoreErrors( $ignore );
 855                 } else {
 856                         throw new DBQueryError( $this, $error, $errno, $sql, $fname );
 857                 }
 858         }
 859
 860         /**
 861          * @return string wikitext of a link to the server software's web site
 862          */
 863         public function getSoftwareLink() {
 864                 return '[http://www.oracle.com/ Oracle]';
 865         }
 866
 867         /**
 868          * @return string Version information from the database
 869          */
 870         function getServerVersion() {
 871                 //better version number, fallback on driver
 872                 $rset = $this->doQuery( 'SELECT version FROM product_component_version WHERE UPPER(product) LIKE \'ORACLE DATABASE%\'' );
 873                 if ( !( $row = $rset->fetchRow() ) ) {
 874                         return oci_server_version( $this->mConn );
 875                 }
 876                 return $row['version'];
 877         }
 878
 879         /**
 880          * Query whether a given index exists
 881          * @return bool
 882          */
 883         function indexExists( $table, $index, $fname = __METHOD__ ) {
 884                 $table = $this->tableName( $table );
 885                 $table = strtoupper( $this->removeIdentifierQuotes( $table ) );
 886                 $index = strtoupper( $index );
 887                 $owner = strtoupper( $this->mDBname );
 888                 $SQL = "SELECT 1 FROM all_indexes WHERE owner='$owner' AND index_name='{$table}_{$index}'";
 889                 $res = $this->doQuery( $SQL );
 890                 if ( $res ) {
 891                         $count = $res->numRows();
 892                         $res->free();
 893                 } else {
 894                         $count = 0;
 895                 }
 896                 return $count != 0;
 897         }
 898
 899         /**
 900          * Query whether a given table exists (in the given schema, or the default mw one if not given)
 901          * @return bool
 902          */
 903         function tableExists( $table, $fname = __METHOD__ ) {
 904                 $table = $this->tableName( $table );
 905                 $table = $this->addQuotes( strtoupper( $this->removeIdentifierQuotes( $table ) ) );
 906                 $owner = $this->addQuotes( strtoupper( $this->mDBname ) );
 907                 $SQL = "SELECT 1 FROM all_tables WHERE owner=$owner AND table_name=$table";
 908                 $res = $this->doQuery( $SQL );
 909                 if ( $res && $res->numRows() > 0 ) {
 910                         $exists = true;
 911                 } else {
 912                         $exists = false;
 913                 }
 914
 915                 $res->free();
 916                 return $exists;
 917         }
 918
 919         /**
 920          * Function translates mysql_fetch_field() functionality on ORACLE.
 921          * Caching is present for reducing query time.
 922          * For internal calls. Use fieldInfo for normal usage.
 923          * Returns false if the field doesn't exist
 924          *
 925          * @param $table Array
 926          * @param $field String
 927          * @return ORAField|ORAResult
 928          */
 929         private function fieldInfoMulti( $table, $field ) {
 930                 $field = strtoupper( $field );
 931                 if ( is_array( $table ) ) {
 932                         $table = array_map( array( &$this, 'tableNameInternal' ), $table );
 933                         $tableWhere = 'IN (';
 934                         foreach ( $table as &$singleTable ) {
 935                                 $singleTable = $this->removeIdentifierQuotes( $singleTable );
 936                                 if ( isset( $this->mFieldInfoCache["$singleTable.$field"] ) ) {
 937                                         return $this->mFieldInfoCache["$singleTable.$field"];
 938                                 }
 939                                 $tableWhere .= '\'' . $singleTable . '\',';
 940                         }
 941                         $tableWhere = rtrim( $tableWhere, ',' ) . ')';
 942                 } else {
 943                         $table = $this->removeIdentifierQuotes( $this->tableNameInternal( $table ) );
 944                         if ( isset( $this->mFieldInfoCache["$table.$field"] ) ) {
 945                                 return $this->mFieldInfoCache["$table.$field"];
 946                         }
 947                         $tableWhere = '= \'' . $table . '\'';
 948                 }
 949
 950                 $fieldInfoStmt = oci_parse( $this->mConn, 'SELECT * FROM wiki_field_info_full WHERE table_name ' . $tableWhere . ' and column_name = \'' . $field . '\'' );
 951                 if ( oci_execute( $fieldInfoStmt, $this->execFlags() ) === false ) {
 952                         $e = oci_error( $fieldInfoStmt );
 953                         $this->reportQueryError( $e['message'], $e['code'], 'fieldInfo QUERY', __METHOD__ );
 954                         return false;
 955                 }
 956                 $res = new ORAResult( $this, $fieldInfoStmt );
 957                 if ( $res->numRows() == 0 ) {
 958                         if ( is_array( $table ) ) {
 959                                 foreach ( $table as &$singleTable ) {
 960                                         $this->mFieldInfoCache["$singleTable.$field"] = false;
 961                                 }
 962                         } else {
 963                                 $this->mFieldInfoCache["$table.$field"] = false;
 964                         }
 965                         $fieldInfoTemp = null;
 966                 } else {
 967                         $fieldInfoTemp = new ORAField( $res->fetchRow() );
 968                         $table = $fieldInfoTemp->tableName();
 969                         $this->mFieldInfoCache["$table.$field"] = $fieldInfoTemp;
 970                 }
 971                 $res->free();
 972                 return $fieldInfoTemp;
 973         }
 974
 975         /**
 976          * @throws DBUnexpectedError
 977          * @param  $table
 978          * @param  $field
 979          * @return ORAField
 980          */
 981         function fieldInfo( $table, $field ) {
 982                 if ( is_array( $table ) ) {
 983                         throw new DBUnexpectedError( $this, 'DatabaseOracle::fieldInfo called with table array!' );
 984                 }
 985                 return $this->fieldInfoMulti( $table, $field );
 986         }
 987
 988         protected function doBegin( $fname = __METHOD__ ) {
 989                 $this->mTrxLevel = 1;
 990                 $this->doQuery( 'SET CONSTRAINTS ALL DEFERRED' );
 991         }
 992
 993         protected function doCommit( $fname = __METHOD__ ) {
 994                 if ( $this->mTrxLevel ) {
 995                         $ret = oci_commit( $this->mConn );
 996                         if ( !$ret ) {
 997                                 throw new DBUnexpectedError( $this, $this->lastError() );
 998                         }
 999                         $this->mTrxLevel = 0;
1000                         $this->doQuery( 'SET CONSTRAINTS ALL IMMEDIATE' );
1001                 }
1002         }
1003
1004         protected function doRollback( $fname = __METHOD__ ) {
1005                 if ( $this->mTrxLevel ) {
1006                         oci_rollback( $this->mConn );
1007                         $this->mTrxLevel = 0;
1008                         $this->doQuery( 'SET CONSTRAINTS ALL IMMEDIATE' );
1009                 }
1010         }
1011
1012         /* defines must comply with ^define\s*([^\s=]*)\s*=\s?'\{\$([^\}]*)\}'; */
1013         function sourceStream( $fp, $lineCallback = false, $resultCallback = false,
1014                 $fname = __METHOD__, $inputCallback = false ) {
1015                 $cmd = '';
1016                 $done = false;
1017                 $dollarquote = false;
1018
1019                 $replacements = array();
1020
1021                 while ( ! feof( $fp ) ) {
1022                         if ( $lineCallback ) {
1023                                 call_user_func( $lineCallback );
1024                         }
1025                         $line = trim( fgets( $fp, 1024 ) );
1026                         $sl = strlen( $line ) - 1;
1027
1028                         if ( $sl < 0 ) {
1029                                 continue;
1030                         }
1031                         if ( '-' == $line { 0 } && '-' == $line { 1 } ) {
1032                                 continue;
1033                         }
1034
1035                         // Allow dollar quoting for function declarations
1036                         if ( substr( $line, 0, 8 ) == '/*$mw$*/' ) {
1037                                 if ( $dollarquote ) {
1038                                         $dollarquote = false;
1039                                         $line = str_replace( '/*$mw$*/', '', $line ); // remove dollarquotes
1040                                         $done = true;
1041                                 } else {
1042                                         $dollarquote = true;
1043                                 }
1044                         } elseif ( !$dollarquote ) {
1045                                 if ( ';' == $line { $sl } && ( $sl < 2 || ';' != $line { $sl - 1 } ) ) {
1046                                         $done = true;
1047                                         $line = substr( $line, 0, $sl );
1048                                 }
1049                         }
1050
1051                         if ( $cmd != '' ) {
1052                                 $cmd .= ' ';
1053                         }
1054                         $cmd .= "$line\n";
1055
1056                         if ( $done ) {
1057                                 $cmd = str_replace( ';;', ";", $cmd );
1058                                 if ( strtolower( substr( $cmd, 0, 6 ) ) == 'define' ) {
1059                                         if ( preg_match( '/^define\s*([^\s=]*)\s*=\s*\'\{\$([^\}]*)\}\'/', $cmd, $defines ) ) {
1060                                                 $replacements[$defines[2]] = $defines[1];
1061                                         }
1062                                 } else {
1063                                         foreach ( $replacements as $mwVar => $scVar ) {
1064                                                 $cmd = str_replace( '&' . $scVar . '.', '`{$' . $mwVar . '}`', $cmd );
1065                                         }
1066
1067                                         $cmd = $this->replaceVars( $cmd );
1068                                         if ( $inputCallback ) {
1069                                                 call_user_func( $inputCallback, $cmd );
1070                                         }
1071                                         $res = $this->doQuery( $cmd );
1072                                         if ( $resultCallback ) {
1073                                                 call_user_func( $resultCallback, $res, $this );
1074                                         }
1075
1076                                         if ( false === $res ) {
1077                                                 $err = $this->lastError();
1078                                                 return "Query \"{$cmd}\" failed with error code \"$err\".\n";
1079                                         }
1080                                 }
1081
1082                                 $cmd = '';
1083                                 $done = false;
1084                         }
1085                 }
1086                 return true;
1087         }
1088
1089         function selectDB( $db ) {
1090                 $this->mDBname = $db;
1091                 if ( $db == null || $db == $this->mUser ) {
1092                         return true;
1093                 }
1094                 $sql = 'ALTER SESSION SET CURRENT_SCHEMA=' . strtoupper( $db );
1095                 $stmt = oci_parse( $this->mConn, $sql );
1096                 wfSuppressWarnings();
1097                 $success = oci_execute( $stmt );
1098                 wfRestoreWarnings();
1099                 if ( !$success ) {
1100                         $e = oci_error( $stmt );
1101                         if ( $e['code'] != '1435' ) {
1102                                 $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
1103                         }
1104                         return false;
1105                 }
1106                 return true;
1107         }
1108
1109         function strencode( $s ) {
1110                 return str_replace( "'", "''", $s );
1111         }
1112
1113         function addQuotes( $s ) {
1114                 global $wgContLang;
1115                 if ( isset( $wgContLang->mLoaded ) && $wgContLang->mLoaded ) {
1116                         $s = $wgContLang->checkTitleEncoding( $s );
1117                 }
1118                 return "'" . $this->strencode( $s ) . "'";
1119         }
1120
1121         public function addIdentifierQuotes( $s ) {
1122                 if ( !$this->getFlag( DBO_DDLMODE ) ) {
1123                         $s = '/*Q*/' . $s;
1124                 }
1125                 return $s;
1126         }
1127
1128         public function removeIdentifierQuotes( $s ) {
1129                 return strpos( $s, '/*Q*/' ) === false ? $s : substr( $s, 5 );
1130         }
1131
1132         public function isQuotedIdentifier( $s ) {
1133                 return strpos( $s, '/*Q*/' ) !== false;
1134         }
1135
1136         private function wrapFieldForWhere( $table, &$col, &$val ) {
1137                 global $wgContLang;
1138
1139                 $col_info = $this->fieldInfoMulti( $table, $col );
1140                 $col_type = $col_info != false ? $col_info->type() : 'CONSTANT';
1141                 if ( $col_type == 'CLOB' ) {
1142                         $col = 'TO_CHAR(' . $col . ')';
1143                         $val = $wgContLang->checkTitleEncoding( $val );
1144                 } elseif ( $col_type == 'VARCHAR2' ) {
1145                         $val = $wgContLang->checkTitleEncoding( $val );
1146                 }
1147         }
1148
1149         private function wrapConditionsForWhere( $table, $conds, $parentCol = null ) {
1150                 $conds2 = array();
1151                 foreach ( $conds as $col => $val ) {
1152                         if ( is_array( $val ) ) {
1153                                 $conds2[$col] = $this->wrapConditionsForWhere( $table, $val, $col );
1154                         } else {
1155                                 if ( is_numeric( $col ) && $parentCol != null ) {
1156                                         $this->wrapFieldForWhere( $table, $parentCol, $val );
1157                                 } else {
1158                                         $this->wrapFieldForWhere( $table, $col, $val );
1159                                 }
1160                                 $conds2[$col] = $val;
1161                         }
1162                 }
1163                 return $conds2;
1164         }
1165
1166         function selectRow( $table, $vars, $conds, $fname = __METHOD__, $options = array(), $join_conds = array() ) {
1167                 if ( is_array( $conds ) ) {
1168                         $conds = $this->wrapConditionsForWhere( $table, $conds );
1169                 }
1170                 return parent::selectRow( $table, $vars, $conds, $fname, $options, $join_conds );
1171         }
1172
1173         /**
1174          * Returns an optional USE INDEX clause to go after the table, and a
1175          * string to go at the end of the query
1176          *
1177          * @private
1178          *
1179          * @param array $options an associative array of options to be turned into
1180          *              an SQL query, valid keys are listed in the function.
1181          * @return array
1182          */
1183         function makeSelectOptions( $options ) {
1184                 $preLimitTail = $postLimitTail = '';
1185                 $startOpts = '';
1186
1187                 $noKeyOptions = array();
1188                 foreach ( $options as $key => $option ) {
1189                         if ( is_numeric( $key ) ) {
1190                                 $noKeyOptions[$option] = true;
1191                         }
1192                 }
1193
1194                 $preLimitTail .= $this->makeGroupByWithHaving( $options );
1195
1196                 $preLimitTail .= $this->makeOrderBy( $options );
1197
1198                 if ( isset( $noKeyOptions['FOR UPDATE'] ) ) {
1199                         $postLimitTail .= ' FOR UPDATE';
1200                 }
1201
1202                 if ( isset( $noKeyOptions['DISTINCT'] ) || isset( $noKeyOptions['DISTINCTROW'] ) ) {
1203                         $startOpts .= 'DISTINCT';
1204                 }
1205
1206                 if ( isset( $options['USE INDEX'] ) && ! is_array( $options['USE INDEX'] ) ) {
1207                         $useIndex = $this->useIndexClause( $options['USE INDEX'] );
1208                 } else {
1209                         $useIndex = '';
1210                 }
1211
1212                 return array( $startOpts, $useIndex, $preLimitTail, $postLimitTail );
1213         }
1214
1215         public function delete( $table, $conds, $fname = __METHOD__ ) {
1216                 if ( is_array( $conds ) ) {
1217                         $conds = $this->wrapConditionsForWhere( $table, $conds );
1218                 }
1219                 // a hack for deleting pages, users and images (which have non-nullable FKs)
1220                 // all deletions on these tables have transactions so final failure rollbacks these updates
1221                 $table = $this->tableName( $table );
1222                 if ( $table == $this->tableName( 'user' ) ) {
1223                                 $this->update( 'archive', array( 'ar_user' => 0 ), array( 'ar_user' => $conds['user_id'] ), $fname );
1224                                 $this->update( 'ipblocks', array( 'ipb_user' => 0 ), array( 'ipb_user' => $conds['user_id'] ), $fname );
1225                                 $this->update( 'image', array( 'img_user' => 0 ), array( 'img_user' => $conds['user_id'] ), $fname );
1226                                 $this->update( 'oldimage', array( 'oi_user' => 0 ), array( 'oi_user' => $conds['user_id'] ), $fname );
1227                                 $this->update( 'filearchive', array( 'fa_deleted_user' => 0 ), array( 'fa_deleted_user' => $conds['user_id'] ), $fname );
1228                                 $this->update( 'filearchive', array( 'fa_user' => 0 ), array( 'fa_user' => $conds['user_id'] ), $fname );
1229                                 $this->update( 'uploadstash', array( 'us_user' => 0 ), array( 'us_user' => $conds['user_id'] ), $fname );
1230                                 $this->update( 'recentchanges', array( 'rc_user' => 0 ), array( 'rc_user' => $conds['user_id'] ), $fname );
1231                                 $this->update( 'logging', array( 'log_user' => 0 ), array( 'log_user' => $conds['user_id'] ), $fname );
1232                 } elseif ( $table == $this->tableName( 'image' ) ) {
1233                                 $this->update( 'oldimage', array( 'oi_name' => 0 ), array( 'oi_name' => $conds['img_name'] ), $fname );
1234                 }
1235                 return parent::delete( $table, $conds, $fname );
1236         }
1237
1238         function update( $table, $values, $conds, $fname = __METHOD__, $options = array() ) {
1239                 global $wgContLang;
1240
1241                 $table = $this->tableName( $table );
1242                 $opts = $this->makeUpdateOptions( $options );
1243                 $sql = "UPDATE $opts $table SET ";
1244
1245                 $first = true;
1246                 foreach ( $values as $col => &$val ) {
1247                         $sqlSet = $this->fieldBindStatement( $table, $col, $val, true );
1248
1249                         if ( !$first ) {
1250                                 $sqlSet = ', ' . $sqlSet;
1251                         } else {
1252                                 $first = false;
1253                         }
1254                         $sql .= $sqlSet;
1255                 }
1256
1257                 if ( $conds !== array() && $conds !== '*' ) {
1258                         $conds = $this->wrapConditionsForWhere( $table, $conds );
1259                         $sql .= ' WHERE ' . $this->makeList( $conds, LIST_AND );
1260                 }
1261
1262                 if ( ( $this->mLastResult = $stmt = oci_parse( $this->mConn, $sql ) ) === false ) {
1263                         $e = oci_error( $this->mConn );
1264                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
1265                         return false;
1266                 }
1267                 foreach ( $values as $col => &$val ) {
1268                         $col_info = $this->fieldInfoMulti( $table, $col );
1269                         $col_type = $col_info != false ? $col_info->type() : 'CONSTANT';
1270
1271                         if ( $val === null ) {
1272                                 // do nothing ... null was inserted in statement creation
1273                         } elseif ( $col_type != 'BLOB' && $col_type != 'CLOB' ) {
1274                                 if ( is_object( $val ) ) {
1275                                         $val = $val->getData();
1276                                 }
1277
1278                                 if ( preg_match( '/^timestamp.*/i', $col_type ) == 1 && strtolower( $val ) == 'infinity' ) {
1279                                         $val = '31-12-2030 12:00:00.000000';
1280                                 }
1281
1282                                 $val = ( $wgContLang != null ) ? $wgContLang->checkTitleEncoding( $val ) : $val;
1283                                 if ( oci_bind_by_name( $stmt, ":$col", $val ) === false ) {
1284                                         $e = oci_error( $stmt );
1285                                         $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
1286                                         return false;
1287                                 }
1288                         } else {
1289                                 if ( ( $lob[$col] = oci_new_descriptor( $this->mConn, OCI_D_LOB ) ) === false ) {
1290                                         $e = oci_error( $stmt );
1291                                         throw new DBUnexpectedError( $this, "Cannot create LOB descriptor: " . $e['message'] );
1292                                 }
1293
1294                                 if ( $col_type == 'BLOB' ) {
1295                                         $lob[$col]->writeTemporary( $val );
1296                                         oci_bind_by_name( $stmt, ":$col", $lob[$col], - 1, SQLT_BLOB );
1297                                 } else {
1298                                         $lob[$col]->writeTemporary( $val );
1299                                         oci_bind_by_name( $stmt, ":$col", $lob[$col], - 1, OCI_B_CLOB );
1300                                 }
1301                         }
1302                 }
1303
1304                 wfSuppressWarnings();
1305
1306                 if ( oci_execute( $stmt, $this->execFlags() ) === false ) {
1307                         $e = oci_error( $stmt );
1308                         if ( !$this->ignore_DUP_VAL_ON_INDEX || $e['code'] != '1' ) {
1309                                 $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
1310                                 return false;
1311                         } else {
1312                                 $this->mAffectedRows = oci_num_rows( $stmt );
1313                         }
1314                 } else {
1315                         $this->mAffectedRows = oci_num_rows( $stmt );
1316                 }
1317
1318                 wfRestoreWarnings();
1319
1320                 if ( isset( $lob ) ) {
1321                         foreach ( $lob as $lob_v ) {
1322                                 $lob_v->free();
1323                         }
1324                 }
1325
1326                 if ( !$this->mTrxLevel ) {
1327                         oci_commit( $this->mConn );
1328                 }
1329
1330                 oci_free_statement( $stmt );
1331         }
1332
1333         function bitNot( $field ) {
1334                 // expecting bit-fields smaller than 4bytes
1335                 return 'BITNOT(' . $field . ')';
1336         }
1337
1338         function bitAnd( $fieldLeft, $fieldRight ) {
1339                 return 'BITAND(' . $fieldLeft . ', ' . $fieldRight . ')';
1340         }
1341
1342         function bitOr( $fieldLeft, $fieldRight ) {
1343                 return 'BITOR(' . $fieldLeft . ', ' . $fieldRight . ')';
1344         }
1345
1346         function setFakeMaster( $enabled = true ) {
1347         }
1348
1349         function getDBname() {
1350                 return $this->mDBname;
1351         }
1352
1353         function getServer() {
1354                 return $this->mServer;
1355         }
1356
1357         public function getSearchEngine() {
1358                 return 'SearchOracle';
1359         }
1360
1361         public function getInfinity() {
1362                 return '31-12-2030 12:00:00.000000';
1363         }
1364
1365 } // end DatabaseOracle class