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