includes/db/DatabaseOracle.php

   1 <?php
   2 /**
   3  * @ingroup Database
   4  * @file
   5  */
   6
   7 /**
   8  * This is the Oracle database abstraction layer.
   9  * @ingroup Database
  10  */
  11 class ORABlob {
  12         var $mData;
  13
  14         function __construct($data) {
  15                 $this->mData = $data;
  16         }
  17
  18         function getData() {
  19                 return $this->mData;
  20         }
  21 }
  22
  23 /**
  24  * The oci8 extension is fairly weak and doesn't support oci_num_rows, among
  25  * other things.  We use a wrapper class to handle that and other
  26  * Oracle-specific bits, like converting column names back to lowercase.
  27  * @ingroup Database
  28  */
  29 class ORAResult {
  30         private $rows;
  31         private $cursor;
  32         private $stmt;
  33         private $nrows;
  34
  35         private $unique;
  36         private function array_unique_md($array_in) {
  37                 $array_out = array();
  38                 $array_hashes = array();
  39
  40                 foreach($array_in as $key => $item) {
  41                         $hash = md5(serialize($item));
  42                         if (!isset($array_hashes[$hash])) {
  43                                 $array_hashes[$hash] = $hash;
  44                                 $array_out[] = $item;
  45                         }
  46                 }
  47
  48                 return $array_out;
  49         }
  50
  51         function __construct(&$db, $stmt, $unique = false) {
  52                 $this->db =& $db;
  53
  54                 if (($this->nrows = oci_fetch_all($stmt, $this->rows, 0, -1, OCI_FETCHSTATEMENT_BY_ROW | OCI_NUM)) === false) {
  55                         $e = oci_error($stmt);
  56                         $db->reportQueryError($e['message'], $e['code'], '', __FUNCTION__);
  57                         return;
  58                 }
  59
  60                 if ($unique) {
  61                         $this->rows = $this->array_unique_md($this->rows);
  62                         $this->nrows = count($this->rows);
  63                 }
  64
  65                 $this->cursor = 0;
  66                 $this->stmt = $stmt;
  67         }
  68
  69         public function free() {
  70                 oci_free_statement($this->stmt);
  71         }
  72
  73         public function seek($row) {
  74                 $this->cursor = min($row, $this->nrows);
  75         }
  76
  77         public function numRows() {
  78                 return $this->nrows;
  79         }
  80
  81         public function numFields() {
  82                 return oci_num_fields($this->stmt);
  83         }
  84
  85         public function fetchObject() {
  86                 if ($this->cursor >= $this->nrows)
  87                         return false;
  88                 $row = $this->rows[$this->cursor++];
  89                 $ret = new stdClass();
  90                 foreach ($row as $k => $v) {
  91                         $lc = strtolower(oci_field_name($this->stmt, $k + 1));
  92                         $ret->$lc = $v;
  93                 }
  94
  95                 return $ret;
  96         }
  97
  98         public function fetchRow() {
  99                 if ($this->cursor >= $this->nrows)
 100                         return false;
 101
 102                 $row = $this->rows[$this->cursor++];
 103                 $ret = array();
 104                 foreach ($row as $k => $v) {
 105                         $lc = strtolower(oci_field_name($this->stmt, $k + 1));
 106                         $ret[$lc] = $v;
 107                         $ret[$k] = $v;
 108                 }
 109                 return $ret;
 110         }
 111 }
 112
 113 /**
 114  * Utility class.
 115  * @ingroup Database
 116  */
 117 class ORAField {
 118         private $name, $tablename, $default, $max_length, $nullable,
 119                 $is_pk, $is_unique, $is_multiple, $is_key, $type;
 120
 121         function __construct($info) {
 122                 $this->name = $info['column_name'];
 123                 $this->tablename = $info['table_name'];
 124                 $this->default = $info['data_default'];
 125                 $this->max_length = $info['data_length'];
 126                 $this->nullable = $info['not_null'];
 127                 $this->is_pk = isset($info['prim']) && $info['prim'] == 1 ? 1 : 0;
 128                 $this->is_unique = isset($info['uniq']) && $info['uniq'] == 1 ? 1 : 0;
 129                 $this->is_multiple = isset($info['nonuniq']) && $info['nonuniq'] == 1 ? 1 : 0;
 130                 $this->is_key = ($this->is_pk || $this->is_unique || $this->is_multiple);
 131                 $this->type = $info['data_type'];
 132         }
 133
 134         function name() {
 135                 return $this->name;
 136         }
 137
 138         function tableName() {
 139                 return $this->tablename;
 140         }
 141
 142         function defaultValue() {
 143                 return $this->default;
 144         }
 145
 146         function maxLength() {
 147                 return $this->max_length;
 148         }
 149
 150         function nullable() {
 151                 return $this->nullable;
 152         }
 153
 154         function isKey() {
 155                 return $this->is_key;
 156         }
 157
 158         function isMultipleKey() {
 159                 return $this->is_multiple;
 160         }
 161
 162         function type() {
 163                 return $this->type;
 164         }
 165 }
 166
 167 /**
 168  * @ingroup Database
 169  */
 170 class DatabaseOracle extends DatabaseBase {
 171         var $mInsertId = NULL;
 172         var $mLastResult = NULL;
 173         var $numeric_version = NULL;
 174         var $lastResult = null;
 175         var $cursor = 0;
 176         var $mAffectedRows;
 177
 178         var $ignore_DUP_VAL_ON_INDEX = false;
 179         var $sequenceData = null;
 180
 181         var $defaultCharset = 'AL32UTF8';
 182
 183         function DatabaseOracle($server = false, $user = false, $password = false, $dbName = false,
 184                 $failFunction = false, $flags = 0, $tablePrefix = 'get from global' )
 185         {
 186                 $tablePrefix = $tablePrefix == 'get from global' ? $tablePrefix : strtoupper($tablePrefix);
 187                 parent::__construct($server, $user, $password, $dbName, $failFunction, $flags, $tablePrefix);
 188                 wfRunHooks( 'DatabaseOraclePostInit', array(&$this));
 189         }
 190
 191         function cascadingDeletes() {
 192                 return true;
 193         }
 194         function cleanupTriggers() {
 195                 return true;
 196         }
 197         function strictIPs() {
 198                 return true;
 199         }
 200         function realTimestamps() {
 201                 return true;
 202         }
 203         function implicitGroupby() {
 204                 return false;
 205         }
 206         function implicitOrderby() {
 207                 return false;
 208         }
 209         function searchableIPs() {
 210                 return true;
 211         }
 212
 213         static function newFromParams( $server, $user, $password, $dbName, $failFunction = false, $flags = 0 )
 214         {
 215                 return new DatabaseOracle( $server, $user, $password, $dbName, $failFunction, $flags );
 216         }
 217
 218         /**
 219          * Usually aborts on failure
 220          * If the failFunction is set to a non-zero integer, returns success
 221          */
 222         function open( $server, $user, $password, $dbName ) {
 223                 if ( !function_exists( 'oci_connect' ) ) {
 224                         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" );
 225                 }
 226
 227                 //putenv("NLS_LANG=AMERICAN_AMERICA.AL32UTF8");
 228
 229                 $this->close();
 230                 $this->mServer = $server;
 231                 $this->mUser = $user;
 232                 $this->mPassword = $password;
 233                 $this->mDBname = $dbName;
 234
 235                 if (!strlen($user)) { ## e.g. the class is being loaded
 236                 return;
 237                 }
 238
 239                 $session_mode = $this->mFlags & DBO_SYSDBA ? OCI_SYSDBA : OCI_DEFAULT;
 240                 if ( $this->mFlags & DBO_DEFAULT )
 241                         $this->mConn = oci_new_connect($user, $password, $dbName, $this->defaultCharset, $session_mode);
 242                 else
 243                         $this->mConn = oci_connect($user, $password, $dbName, $this->defaultCharset, $session_mode);
 244
 245                 if ($this->mConn == false) {
 246                         wfDebug("DB connection error\n");
 247                         wfDebug("Server: $server, Database: $dbName, User: $user, Password: " . substr( $password, 0, 3 ) . "...\n");
 248                         wfDebug($this->lastError()."\n");
 249                         return false;
 250                 }
 251
 252                 $this->mOpened = true;
 253
 254                 #removed putenv calls because they interfere with the system globaly
 255                 $this->doQuery('ALTER SESSION SET NLS_TIMESTAMP_FORMAT=\'DD-MM-YYYY HH24:MI:SS.FF6\'');
 256                 $this->doQuery('ALTER SESSION SET NLS_TIMESTAMP_TZ_FORMAT=\'DD-MM-YYYY HH24:MI:SS.FF6\'');
 257                 return $this->mConn;
 258         }
 259
 260         /**
 261          * Closes a database connection, if it is open
 262          * Returns success, true if already closed
 263          */
 264         function close() {
 265                 $this->mOpened = false;
 266                 if ( $this->mConn ) {
 267                         return oci_close( $this->mConn );
 268                 } else {
 269                         return true;
 270                 }
 271         }
 272
 273         function execFlags() {
 274                 return $this->mTrxLevel ? OCI_DEFAULT : OCI_COMMIT_ON_SUCCESS;
 275         }
 276
 277         function doQuery($sql) {
 278                 wfDebug("SQL: [$sql]\n");
 279                 if (!mb_check_encoding($sql)) {
 280                         throw new MWException("SQL encoding is invalid\n$sql");
 281                 }
 282
 283                 //handle some oracle specifics
 284                 //remove AS column/table/subquery namings
 285                 if(!defined('MEDIAWIKI_INSTALL'))
 286                         $sql = preg_replace('/ as /i', ' ', $sql);
 287                 // Oracle has issues with UNION clause if the statement includes LOB fields
 288                 // So we do a UNION ALL and then filter the results array with array_unique
 289                 $union_unique = (preg_match('/\/\* UNION_UNIQUE \*\/ /', $sql) != 0);
 290                 //EXPLAIN syntax in Oracle is EXPLAIN PLAN FOR and it return nothing
 291                 //you have to select data from plan table after explain
 292                 $olderr = error_reporting(E_ERROR);
 293                 $explain_id = date('dmYHis');
 294                 error_reporting($olderr);
 295
 296                 $sql = preg_replace('/^EXPLAIN /', 'EXPLAIN PLAN SET STATEMENT_ID = \''.$explain_id.'\' FOR', $sql, 1, $explain_count);
 297
 298
 299                 $olderr = error_reporting(E_ERROR);
 300
 301                 if (($this->mLastResult = $stmt = oci_parse($this->mConn, $sql)) === false) {
 302                         $e = oci_error($this->mConn);
 303                         $this->reportQueryError($e['message'], $e['code'], $sql, __FUNCTION__);
 304                 }
 305
 306                 $olderr = error_reporting(E_ERROR);
 307                 if (oci_execute($stmt, $this->execFlags()) == false) {
 308                         $e = oci_error($stmt);
 309                         if (!$this->ignore_DUP_VAL_ON_INDEX || $e['code'] != '1')
 310                                 $this->reportQueryError($e['message'], $e['code'], $sql, __FUNCTION__);
 311                 }
 312                 error_reporting($olderr);
 313
 314                 if ($explain_count > 0) {
 315                         return $this->doQuery('SELECT id, cardinality "ROWS" FROM plan_table WHERE statement_id = \''.$explain_id.'\'');
 316                 } elseif (oci_statement_type($stmt) == "SELECT") {
 317                         return new ORAResult($this, $stmt, $union_unique);
 318                 } else {
 319                         $this->mAffectedRows = oci_num_rows($stmt);
 320                         return true;
 321                 }
 322         }
 323
 324         function queryIgnore($sql, $fname = '') {
 325                 return $this->query($sql, $fname, true);
 326         }
 327
 328         function freeResult($res) {
 329                 if ( $res instanceof ORAResult ) {
 330                         $res->free();
 331                 } else {
 332                         $res->result->free();
 333                 }
 334         }
 335
 336         function fetchObject($res) {
 337                 if ( $res instanceof ORAResult ) {
 338                         return $res->numRows();
 339                 } else {
 340                         return $res->result->fetchObject();
 341                 }
 342         }
 343
 344         function fetchRow($res) {
 345                 if ( $res instanceof ORAResult ) {
 346                         return $res->fetchRow();
 347                 } else {
 348                         return $res->result->fetchRow();
 349                 }
 350         }
 351
 352         function numRows($res) {
 353                 if ( $res instanceof ORAResult ) {
 354                         return $res->numRows();
 355                 } else {
 356                         return $res->result->numRows();
 357                 }
 358         }
 359
 360         function numFields($res) {
 361                 if ( $res instanceof ORAResult ) {
 362                         return $res->numFields();
 363                 } else {
 364                         return $res->result->numFields();
 365                 }
 366         }
 367
 368         function fieldName($stmt, $n) {
 369                 return oci_field_name($stmt, $n);
 370         }
 371
 372         /**
 373          * This must be called after nextSequenceVal
 374          */
 375         function insertId() {
 376                 return $this->mInsertId;
 377         }
 378
 379         function dataSeek($res, $row) {
 380                 if ( $res instanceof ORAResult ) {
 381                         $res->seek($row);
 382                 } else {
 383                         $res->result->seek($row);
 384                 }
 385         }
 386
 387         function lastError() {
 388                 if ($this->mConn === false)
 389                         $e = oci_error();
 390                 else
 391                         $e = oci_error($this->mConn);
 392                 return $e['message'];
 393         }
 394
 395         function lastErrno() {
 396                 if ($this->mConn === false)
 397                         $e = oci_error();
 398                 else
 399                         $e = oci_error($this->mConn);
 400                 return $e['code'];
 401         }
 402
 403         function affectedRows() {
 404                 return $this->mAffectedRows;
 405         }
 406
 407         /**
 408          * Returns information about an index
 409          * If errors are explicitly ignored, returns NULL on failure
 410          */
 411         function indexInfo( $table, $index, $fname = 'DatabaseOracle::indexExists' ) {
 412                 return false;
 413         }
 414
 415         function indexUnique ($table, $index, $fname = 'DatabaseOracle::indexUnique' ) {
 416                 return false;
 417         }
 418
 419         function insert( $table, $a, $fname = 'DatabaseOracle::insert', $options = array() ) {
 420                 if ( !count( $a ) )
 421                         return true;
 422
 423                 if (!is_array($options))
 424                         $options = array($options);
 425
 426                 if (in_array('IGNORE', $options))
 427                         $this->ignore_DUP_VAL_ON_INDEX = true;
 428
 429                 if (!is_array(reset($a))) {
 430                         $a = array($a);
 431                 }
 432
 433                 foreach ($a as &$row) {
 434                         $this->insertOneRow($table, $row, $fname);
 435                 }
 436                 $retVal = true;
 437
 438                 if (in_array('IGNORE', $options))
 439                         $this->ignore_DUP_VAL_ON_INDEX = false;
 440
 441                 return $retVal;
 442         }
 443
 444         function insertOneRow($table, $row, $fname) {
 445                 global $wgLang;
 446
 447                 // "INSERT INTO tables (a, b, c)"
 448                 $sql = "INSERT INTO " . $this->tableName($table) . " (" . join(',', array_keys($row)) . ')';
 449                 $sql .= " VALUES (";
 450
 451                 // for each value, append ":key"
 452                 $first = true;
 453                 foreach ($row as $col => $val) {
 454                         if ($first)
 455                                 $sql .= $val !== NULL ? ':'.$col : 'NULL';
 456                         else
 457                                 $sql .= $val !== NULL ? ', :'.$col : ', NULL';
 458
 459                         $first = false;
 460                 }
 461                 $sql .= ')';
 462
 463
 464                 $stmt = oci_parse($this->mConn, $sql);
 465                 foreach ($row as $col => &$val) {
 466                         $col_type=$this->fieldInfo($this->tableName($table), $col)->type();
 467
 468                         if ($val === NULL) {
 469                                 // do nothing ... null was inserted in statement creation
 470                         } elseif ($col_type != 'BLOB' && $col_type != 'CLOB') {
 471                                 if (is_object($val))
 472                                         $val = $val->getData();
 473
 474                                 if (preg_match('/^timestamp.*/i', $col_type) == 1 && strtolower($val) == 'infinity')
 475                                         $val = '31-12-2030 12:00:00.000000';
 476
 477                                 $val = ($wgLang != null) ? $wgLang->checkTitleEncoding($val) : $val;
 478                                 if (oci_bind_by_name($stmt, ":$col", $val) === false)
 479                                         $this->reportQueryError($this->lastErrno(), $this->lastError(), $sql, __METHOD__);
 480                         } else {
 481                                 if (($lob[$col] = oci_new_descriptor($this->mConn, OCI_D_LOB)) === false) {
 482                                         $e = oci_error($stmt);
 483                                         throw new DBUnexpectedError($this, "Cannot create LOB descriptor: " . $e['message']);
 484                                 }
 485
 486                                 if ($col_type == 'BLOB') { //is_object($val)) {
 487                                         $lob[$col]->writeTemporary($val); //->getData());
 488                                         oci_bind_by_name($stmt, ":$col", $lob[$col], -1, SQLT_BLOB);
 489                                 } else {
 490                                         $lob[$col]->writeTemporary($val);
 491                                         oci_bind_by_name($stmt, ":$col", $lob[$col], -1, OCI_B_CLOB);
 492                                 }
 493                         }
 494                 }
 495
 496                 $olderr = error_reporting(E_ERROR);
 497                 if (oci_execute($stmt, OCI_DEFAULT) === false) {
 498                         $e = oci_error($stmt);
 499
 500                         if (!$this->ignore_DUP_VAL_ON_INDEX || $e['code'] != '1')
 501                                 $this->reportQueryError($e['message'], $e['code'], $sql, __METHOD__);
 502                         else
 503                                 $this->mAffectedRows = oci_num_rows($stmt);
 504                 } else
 505                         $this->mAffectedRows = oci_num_rows($stmt);
 506                 error_reporting($olderr);
 507
 508                 if (isset($lob)){
 509                         foreach ($lob as $lob_i => $lob_v) {
 510                                 $lob_v->free();
 511                         }
 512                 }
 513
 514                 if (!$this->mTrxLevel)
 515                         oci_commit($this->mConn);
 516
 517                 oci_free_statement($stmt);
 518         }
 519
 520         function insertSelect( $destTable, $srcTable, $varMap, $conds, $fname = 'DatabaseOracle::insertSelect',
 521                 $insertOptions = array(), $selectOptions = array() )
 522         {
 523                 $destTable = $this->tableName( $destTable );
 524                 if( !is_array( $selectOptions ) ) {
 525                         $selectOptions = array( $selectOptions );
 526                 }
 527                 list( $startOpts, $useIndex, $tailOpts ) = $this->makeSelectOptions( $selectOptions );
 528                 if( is_array( $srcTable ) ) {
 529                         $srcTable =  implode( ',', array_map( array( &$this, 'tableName' ), $srcTable ) );
 530                 } else {
 531                         $srcTable = $this->tableName( $srcTable );
 532                 }
 533
 534                 if (($sequenceData = $this->getSequenceData($destTable)) !== false &&
 535                                 !isset($varMap[$sequenceData['column']]))
 536                         $varMap[$sequenceData['column']] = 'GET_SEQUENCE_VALUE(\''.$sequenceData['sequence'].'\')';
 537
 538                 // count-alias subselect fields to avoid abigious definition errors
 539                 $i=0;
 540                 foreach($varMap as $key=>&$val)
 541                         $val=$val.' field'.($i++);
 542
 543                 $sql = "INSERT INTO $destTable (" . implode( ',', array_keys( $varMap ) ) . ')' .
 544                         " SELECT $startOpts " . implode( ',', $varMap ) .
 545                         " FROM $srcTable $useIndex ";
 546                 if ( $conds != '*' ) {
 547                         $sql .= ' WHERE ' . $this->makeList( $conds, LIST_AND );
 548                 }
 549                 $sql .= " $tailOpts";
 550
 551                 if (in_array('IGNORE', $insertOptions))
 552                         $this->ignore_DUP_VAL_ON_INDEX = true;
 553
 554                 $retval = $this->query( $sql, $fname );
 555
 556                 if (in_array('IGNORE', $insertOptions))
 557                         $this->ignore_DUP_VAL_ON_INDEX = false;
 558
 559                 return $retval;
 560         }
 561
 562         function tableName( $name ) {
 563                 global $wgSharedDB, $wgSharedPrefix, $wgSharedTables;
 564                 /*
 565                 Replace reserved words with better ones
 566                 Useing uppercase, because that's the only way oracle can handle
 567                 quoted tablenames
 568                 */
 569                 switch( $name ) {
 570                         case 'user':
 571                                 $name = 'MWUSER'; break;
 572                         case 'text':
 573                                 $name = 'PAGECONTENT'; break;
 574                 }
 575
 576                 /*
 577                         The rest of procedure is equal to generic Databse class
 578                         except for the quoting style
 579                 */
 580                 if ( $name[0] == '"' && substr( $name, -1, 1 ) == '"' ) return $name;
 581
 582                 if( preg_match( '/(^|\s)(DISTINCT|JOIN|ON|AS)(\s|$)/i', $name ) !== 0 ) return $name;
 583                 $dbDetails = array_reverse( explode( '.', $name, 2 ) );
 584                 if( isset( $dbDetails[1] ) ) @list( $table, $database ) = $dbDetails;
 585                 else                         @list( $table ) = $dbDetails;
 586
 587                 $prefix = $this->mTablePrefix;
 588
 589                 if( isset($database) ) $table = ( $table[0] == '`' ? $table : "`{$table}`" );
 590
 591                 if( !isset( $database )
 592                  && isset( $wgSharedDB )
 593                  && $table[0] != '"'
 594                  && isset( $wgSharedTables )
 595                  && is_array( $wgSharedTables )
 596                  && in_array( $table, $wgSharedTables ) ) {
 597                         $database = $wgSharedDB;
 598                         $prefix   = isset( $wgSharedPrefix ) ? $wgSharedPrefix : $prefix;
 599                 }
 600
 601                 if( isset($database) ) $database = ( $database[0] == '"' ? $database : "\"{$database}\"" );
 602                 $table = ( $table[0] == '"' ? $table : "\"{$prefix}{$table}\"" );
 603
 604                 $tableName = ( isset($database) ? "{$database}.{$table}" : "{$table}" );
 605
 606                 return strtoupper($tableName);
 607         }
 608
 609         /**
 610          * Return the next in a sequence, save the value for retrieval via insertId()
 611          */
 612         function nextSequenceValue($seqName) {
 613                 $res = $this->query("SELECT $seqName.nextval FROM dual");
 614                 $row = $this->fetchRow($res);
 615                 $this->mInsertId = $row[0];
 616                 $this->freeResult($res);
 617                 return $this->mInsertId;
 618         }
 619
 620         /**
 621          * Return sequence_name if table has a sequence
 622          */
 623         function getSequenceData($table) {
 624                 if ($this->sequenceData == NULL) {
 625                         $result = $this->query("SELECT lower(us.sequence_name), lower(utc.table_name), lower(utc.column_name) from user_sequences us, user_tab_columns utc where us.sequence_name = utc.table_name||'_'||utc.column_name||'_SEQ'");
 626
 627                         while(($row = $result->fetchRow()) !== false)
 628                                 $this->sequenceData[$this->tableName($row[1])] = array('sequence' => $row[0], 'column' => $row[2]);
 629                 }
 630
 631                 return (isset($this->sequenceData[$table])) ? $this->sequenceData[$table] : false;
 632         }
 633
 634
 635         # REPLACE query wrapper
 636         # Oracle simulates this with a DELETE followed by INSERT
 637         # $row is the row to insert, an associative array
 638         # $uniqueIndexes is an array of indexes. Each element may be either a
 639         # field name or an array of field names
 640         #
 641         # It may be more efficient to leave off unique indexes which are unlikely to collide.
 642         # However if you do this, you run the risk of encountering errors which wouldn't have
 643         # occurred in MySQL
 644         function replace( $table, $uniqueIndexes, $rows, $fname = 'DatabaseOracle::replace' ) {
 645                 $table = $this->tableName($table);
 646
 647                 if (count($rows)==0) {
 648                         return;
 649                 }
 650
 651                 # Single row case
 652                 if (!is_array(reset($rows))) {
 653                         $rows = array($rows);
 654                 }
 655
 656                 $sequenceData = $this->getSequenceData($table);
 657
 658                 foreach( $rows as $row ) {
 659                         # Delete rows which collide
 660                         if ( $uniqueIndexes ) {
 661                                 $condsDelete = array();
 662                                 foreach ( $uniqueIndexes as $index )
 663                                         $condsDelete[$index] = $row[$index];
 664                                 $this->delete( $table, $condsDelete, $fname);
 665 /*
 666                                 $sql = "DELETE FROM $table WHERE ";
 667                                 $first = true;
 668                                 foreach ( $uniqueIndexes as $index ) {
 669                                         if ( $first ) {
 670                                                 $first = false;
 671                                                 $sql .= "(";
 672                                         } else {
 673                                                 $sql .= ') OR (';
 674                                         }
 675                                         if ( is_array( $index ) ) {
 676                                                 $first2 = true;
 677                                                 foreach ( $index as $col ) {
 678                                                         if ( $first2 ) {
 679                                                                 $first2 = false;
 680                                                         } else {
 681                                                                 $sql .= ' AND ';
 682                                                         }
 683                                                         $sql .= $col.'=' . $this->addQuotes( $row[$col] );
 684                                                 }
 685                                         } else {
 686                                                 $sql .= $index.'=' . $this->addQuotes( $row[$index] );
 687                                         }
 688                                 }
 689                                 $sql .= ')';
 690
 691                                 $this->doQuery( $sql);//, $fname );
 692 */
 693                         }
 694
 695                         if ($sequenceData !== false && !isset($row[$sequenceData['column']]))
 696                                 $row[$sequenceData['column']] = $this->nextSequenceValue($sequenceData['sequence']);
 697
 698                         # Now insert the row
 699                         $this->insert( $table, $row, $fname );
 700                 }
 701         }
 702
 703         # DELETE where the condition is a join
 704         function deleteJoin( $delTable, $joinTable, $delVar, $joinVar, $conds, $fname = "DatabaseOracle::deleteJoin" ) {
 705                 if ( !$conds ) {
 706                         throw new DBUnexpectedError($this,  'DatabaseOracle::deleteJoin() called with empty $conds' );
 707                 }
 708
 709                 $delTable = $this->tableName( $delTable );
 710                 $joinTable = $this->tableName( $joinTable );
 711                 $sql = "DELETE FROM $delTable WHERE $delVar IN (SELECT $joinVar FROM $joinTable ";
 712                 if ( $conds != '*' ) {
 713                         $sql .= 'WHERE ' . $this->makeList( $conds, LIST_AND );
 714                 }
 715                 $sql .= ')';
 716
 717                 $this->query( $sql, $fname );
 718         }
 719
 720         # Returns the size of a text field, or -1 for "unlimited"
 721         function textFieldSize( $table, $field ) {
 722                 $table = $this->tableName( $table );
 723                 $sql = "SELECT t.typname as ftype,a.atttypmod as size
 724                         FROM pg_class c, pg_attribute a, pg_type t
 725                         WHERE relname='$table' AND a.attrelid=c.oid AND
 726                                 a.atttypid=t.oid and a.attname='$field'";
 727                 $res =$this->query($sql);
 728                 $row=$this->fetchObject($res);
 729                 if ($row->ftype=="varchar") {
 730                         $size=$row->size-4;
 731                 } else {
 732                         $size=$row->size;
 733                 }
 734                 $this->freeResult( $res );
 735                 return $size;
 736         }
 737
 738         function limitResult( $sql, $limit, $offset=false ) {
 739                 if ($offset === false)
 740                         $offset = 0;
 741                 return "SELECT * FROM ($sql) WHERE rownum >= (1 + $offset) AND rownum < (1 + $limit + $offset)";
 742         }
 743
 744
 745         function unionQueries($sqls, $all) {
 746                 $glue = ' UNION ALL ';
 747                 return 'SELECT * '.($all?'':'/* UNION_UNIQUE */ ').'FROM ('.implode( $glue, $sqls ).')' ;
 748         }
 749
 750         function wasDeadlock() {
 751                 return $this->lastErrno() == 'OCI-00060';
 752         }
 753
 754
 755         function duplicateTableStructure( $oldName, $newName, $temporary = false, $fname = 'DatabaseOracle::duplicateTableStructure' ) {
 756                 $temporary = $temporary ? 'TRUE' : 'FALSE';
 757                 return $this->query( 'BEGIN DUPLICATE_TABLE(\''.$oldName.'\', \''.$newName.'\', '.$temporary.'); END;', $fname );
 758         }
 759
 760         function timestamp($ts = 0) {
 761                 return wfTimestamp(TS_ORACLE, $ts);
 762         }
 763
 764         /**
 765          * Return aggregated value function call
 766          */
 767         function aggregateValue ($valuedata,$valuename='value') {
 768                 return $valuedata;
 769         }
 770
 771         function reportQueryError($error, $errno, $sql, $fname, $tempIgnore = false) {
 772                 # Ignore errors during error handling to avoid infinite
 773                 # recursion
 774                 $ignore = $this->ignoreErrors(true);
 775                 ++$this->mErrorCount;
 776
 777                 if ($ignore || $tempIgnore) {
 778                         wfDebug("SQL ERROR (ignored): $error\n");
 779                         $this->ignoreErrors( $ignore );
 780                 }
 781                 else {
 782                         $message = "A database error has occurred\n" .
 783                                 "Query: $sql\n" .
 784                                 "Function: $fname\n" .
 785                                 "Error: $errno $error\n";
 786                         throw new DBUnexpectedError($this, $message);
 787                 }
 788         }
 789
 790         /**
 791          * @return string wikitext of a link to the server software's web site
 792          */
 793         function getSoftwareLink() {
 794                 return "[http://www.oracle.com/ Oracle]";
 795         }
 796
 797         /**
 798          * @return string Version information from the database
 799          */
 800         function getServerVersion() {
 801                 return oci_server_version($this->mConn);
 802         }
 803
 804         /**
 805          * Query whether a given table exists (in the given schema, or the default mw one if not given)
 806          */
 807         function tableExists($table) {
 808                 $SQL = "SELECT 1 FROM user_tables WHERE table_name='$table'";
 809                 $res = $this->doQuery($SQL);
 810                 if ($res) {
 811                         $count = $res->numRows();
 812                         $res->free();
 813                 } else {
 814                         $count = 0;
 815                 }
 816                 return $count;
 817         }
 818
 819         /**
 820          * Query whether a given column exists in the mediawiki schema
 821          * based on prebuilt table to simulate MySQL field info and keep query speed minimal
 822          */
 823         function fieldExists( $table, $field, $fname = 'DatabaseOracle::fieldExists' ) {
 824                 if (!isset($this->fieldInfo_stmt))
 825                         $this->fieldInfo_stmt = oci_parse($this->mConn, 'SELECT * FROM wiki_field_info_full WHERE table_name = upper(:tab) and column_name = UPPER(:col)');
 826
 827                 oci_bind_by_name($this->fieldInfo_stmt, ':tab', trim($table, '"'));
 828                 oci_bind_by_name($this->fieldInfo_stmt, ':col', $field);
 829
 830                 if (oci_execute($this->fieldInfo_stmt, OCI_DEFAULT) === false) {
 831                         $e = oci_error($this->fieldInfo_stmt);
 832                         $this->reportQueryError($e['message'], $e['code'], 'fieldInfo QUERY', __METHOD__);
 833                         return false;
 834                 }
 835                 $res = new ORAResult($this,$this->fieldInfo_stmt);
 836                 return $res->numRows() != 0;
 837         }
 838
 839         function fieldInfo( $table, $field ) {
 840                 if (!isset($this->fieldInfo_stmt))
 841                         $this->fieldInfo_stmt = oci_parse($this->mConn, 'SELECT * FROM wiki_field_info_full WHERE table_name = upper(:tab) and column_name = UPPER(:col)');
 842
 843                 $table = trim($table, '"');
 844                 oci_bind_by_name($this->fieldInfo_stmt, ':tab', $table);
 845                 oci_bind_by_name($this->fieldInfo_stmt, ':col', $field);
 846
 847                 if (oci_execute($this->fieldInfo_stmt, OCI_DEFAULT) === false) {
 848                         $e = oci_error($this->fieldInfo_stmt);
 849                         $this->reportQueryError($e['message'], $e['code'], 'fieldInfo QUERY', __METHOD__);
 850                         return false;
 851                 }
 852                 $res = new ORAResult($this,$this->fieldInfo_stmt);
 853                 return new ORAField($res->fetchRow());
 854         }
 855
 856         function begin( $fname = '' ) {
 857                 $this->mTrxLevel = 1;
 858         }
 859         function immediateCommit( $fname = '' ) {
 860                 return true;
 861         }
 862         function commit( $fname = '' ) {
 863                 oci_commit($this->mConn);
 864                 $this->mTrxLevel = 0;
 865         }
 866
 867         /* Not even sure why this is used in the main codebase... */
 868         function limitResultForUpdate($sql, $num) {
 869                 return $sql;
 870         }
 871
 872         /* defines must comply with ^define\s*([^\s=]*)\s*=\s?'\{\$([^\}]*)\}'; */
 873         function sourceStream( $fp, $lineCallback = false, $resultCallback = false ) {
 874                 $cmd = "";
 875                 $done = false;
 876                 $dollarquote = false;
 877
 878                 $replacements = array();
 879
 880                 while ( ! feof( $fp ) ) {
 881                         if ( $lineCallback ) {
 882                                 call_user_func( $lineCallback );
 883                         }
 884                         $line = trim( fgets( $fp, 1024 ) );
 885                         $sl = strlen( $line ) - 1;
 886
 887                         if ( $sl < 0 ) { continue; }
 888                         if ( '-' == $line{0} && '-' == $line{1} ) { continue; }
 889
 890                         // Allow dollar quoting for function declarations
 891                         if (substr($line,0,8) == '/*$mw$*/') {
 892                                 if ($dollarquote) {
 893                                         $dollarquote = false;
 894                                         $done = true;
 895                                 }
 896                                 else {
 897                                         $dollarquote = true;
 898                                 }
 899                         }
 900                         else if (!$dollarquote) {
 901                                 if ( ';' == $line{$sl} && ($sl < 2 || ';' != $line{$sl - 1})) {
 902                                         $done = true;
 903                                         $line = substr( $line, 0, $sl );
 904                                 }
 905                         }
 906
 907                         if ( '' != $cmd ) { $cmd .= ' '; }
 908                         $cmd .= "$line\n";
 909
 910                         if ( $done ) {
 911                                 $cmd = str_replace(';;', ";", $cmd);
 912                                 if (strtolower(substr($cmd, 0, 6)) == 'define' ) {
 913                                         if (preg_match('/^define\s*([^\s=]*)\s*=\s*\'\{\$([^\}]*)\}\'/', $cmd, $defines)) {
 914                                                 $replacements[$defines[2]] = $defines[1];
 915                                         }
 916                                 } else {
 917                                         foreach ( $replacements as $mwVar=>$scVar ) {
 918                                                 $cmd = str_replace( '&' . $scVar . '.', '{$'.$mwVar.'}', $cmd );
 919                                         }
 920
 921                                         $cmd = $this->replaceVars( $cmd );
 922                                         $res = $this->query( $cmd, __METHOD__ );
 923                                         if ( $resultCallback ) {
 924                                                 call_user_func( $resultCallback, $res, $this );
 925                                         }
 926
 927                                         if ( false === $res ) {
 928                                                 $err = $this->lastError();
 929                                                 return "Query \"{$cmd}\" failed with error code \"$err\".\n";
 930                                         }
 931                                 }
 932
 933                                 $cmd = '';
 934                                 $done = false;
 935                         }
 936                 }
 937                 return true;
 938         }
 939
 940         function setup_database() {
 941                 global $wgVersion, $wgDBmwschema, $wgDBts2schema, $wgDBport, $wgDBuser;
 942
 943                 echo "<li>Creating DB objects</li>\n";
 944                 $res = $this->sourceFile( "../maintenance/ora/tables.sql" );
 945
 946                 // Avoid the non-standard "REPLACE INTO" syntax
 947                 echo "<li>Populating table interwiki</li>\n";
 948                 $f = fopen( "../maintenance/interwiki.sql", 'r' );
 949                 if ($f == false ) {
 950                         dieout( "<li>Could not find the interwiki.sql file</li>");
 951                 }
 952
 953                 //do it like the postgres :D
 954                 $SQL = "INSERT INTO interwiki(iw_prefix,iw_url,iw_local) VALUES ";
 955                 while ( ! feof( $f ) ) {
 956                         $line = fgets($f,1024);
 957                         $matches = array();
 958                         if (!preg_match('/^\s*(\(.+?),(\d)\)/', $line, $matches)) {
 959                                 continue;
 960                         }
 961                         $this->query("$SQL $matches[1],$matches[2])");
 962                 }
 963
 964                 echo "<li>Table interwiki successfully populated</li>\n";
 965         }
 966
 967         function strencode($s) {
 968                 return str_replace("'", "''", $s);
 969         }
 970
 971 /*
 972         function encodeBlob($b) {
 973                 return $b; //new ORABlob($b);
 974         }
 975         function decodeBlob($b) {
 976                 return $b; //return $b->load();
 977         }
 978 */
 979         function addQuotes( $s ) {
 980                 global $wgLang;
 981                 if (isset($wgLang->mLoaded) && $wgLang->mLoaded)
 982                         $s = $wgLang->checkTitleEncoding($s);
 983                 return "'" . $this->strencode($s) . "'";
 984         }
 985
 986         function quote_ident( $s ) {
 987                 return $s;
 988         }
 989
 990         function selectRow( $table, $vars, $conds, $fname = 'DatabaseOracle::selectRow', $options = array(), $join_conds = array() ) {
 991                 global $wgLang;
 992
 993                 $conds2 = array();
 994                 foreach($conds as $col=>$val) {
 995                         $col_type=$this->fieldInfo($this->tableName($table), $col)->type();
 996                         if ($col_type == 'CLOB')
 997                                 $conds2['TO_CHAR('.$col.')'] = $wgLang->checkTitleEncoding($val);
 998                         elseif ($col_type == 'VARCHAR2' && !mb_check_encoding($val)) {
 999                                 $conds2[$col] = $wgLang->checkTitleEncoding($val);
1000                         } else {
1001                                 $conds2[$col] = $val;
1002                         }
1003                 }
1004
1005                 if (is_array($table))
1006                         foreach ($table as $tab)
1007                                 $tab = $this->tableName($tab);
1008                 else
1009                         $table = $this->tableName($table);
1010
1011                 return parent::selectRow($table, $vars, $conds2, $fname, $options, $join_conds);
1012         }
1013
1014         /**
1015          * Returns an optional USE INDEX clause to go after the table, and a
1016          * string to go at the end of the query
1017          *
1018          * @private
1019          *
1020          * @param $options Array: an associative array of options to be turned into
1021          *              an SQL query, valid keys are listed in the function.
1022          * @return array
1023          */
1024         function makeSelectOptions( $options ) {
1025                 $preLimitTail = $postLimitTail = '';
1026                 $startOpts = '';
1027
1028                 $noKeyOptions = array();
1029                 foreach ( $options as $key => $option ) {
1030                         if ( is_numeric( $key ) ) {
1031                                 $noKeyOptions[$option] = true;
1032                         }
1033                 }
1034
1035                 if ( isset( $options['GROUP BY'] ) ) $preLimitTail .= " GROUP BY {$options['GROUP BY']}";
1036                 if ( isset( $options['ORDER BY'] ) ) $preLimitTail .= " ORDER BY {$options['ORDER BY']}";
1037
1038                 #if ( isset( $noKeyOptions['FOR UPDATE'] ) ) $tailOpts .= ' FOR UPDATE';
1039                 #if ( isset( $noKeyOptions['LOCK IN SHARE MODE'] ) ) $tailOpts .= ' LOCK IN SHARE MODE';
1040                 if ( isset( $noKeyOptions['DISTINCT'] ) || isset( $noKeyOptions['DISTINCTROW'] ) ) $startOpts .= 'DISTINCT';
1041
1042                 if ( isset( $options['USE INDEX'] ) && ! is_array( $options['USE INDEX'] ) ) {
1043                         $useIndex = $this->useIndexClause( $options['USE INDEX'] );
1044                 } else {
1045                         $useIndex = '';
1046                 }
1047
1048                 return array( $startOpts, $useIndex, $preLimitTail, $postLimitTail );
1049         }
1050
1051         public function delete( $table, $conds, $fname = 'DatabaseOracle::delete' ) {
1052                 global $wgLang;
1053
1054                 if ($wgLang != null) {
1055                         $conds2 = array();
1056                         foreach($conds as $col=>$val) {
1057                                 $col_type=$this->fieldInfo($this->tableName($table), $col)->type();
1058                                 if ($col_type == 'CLOB')
1059                                         $conds2['TO_CHAR('.$col.')'] = $wgLang->checkTitleEncoding($val);
1060                                 else
1061                                         if (is_array($val)) {
1062                                                 $conds2[$col] = $val;
1063                                                 foreach($conds2[$col] as &$val2)
1064                                                         $val2 = $wgLang->checkTitleEncoding($val2);
1065                                         } else {
1066                                                 $conds2[$col] = $wgLang->checkTitleEncoding($val);
1067                                         }
1068                         }
1069
1070                         return parent::delete( $table, $conds2, $fname );
1071                 } else return parent::delete( $table, $conds, $fname );
1072         }
1073
1074         function bitNot($field) {
1075                 //expecting bit-fields smaller than 4bytes
1076                 return 'BITNOT('.$bitField.')';
1077         }
1078
1079         function bitAnd($fieldLeft, $fieldRight) {
1080                 return 'BITAND('.$fieldLeft.', '.$fieldRight.')';
1081         }
1082
1083         function bitOr($fieldLeft, $fieldRight) {
1084                 return 'BITOR('.$fieldLeft.', '.$fieldRight.')';
1085         }
1086
1087         /**
1088          * How lagged is this slave?
1089          *
1090          * @return int
1091          */
1092         public function getLag() {
1093                 # Not implemented for Oracle
1094                 return 0;
1095         }
1096
1097         function setFakeSlaveLag( $lag ) {}
1098         function setFakeMaster( $enabled = true ) {}
1099
1100         function getDBname() {
1101                 return $this->mDBname;
1102         }
1103
1104         function getServer() {
1105                 return $this->mServer;
1106         }
1107
1108         public function replaceVars( $ins ) {
1109                 $varnames = array('wgDBprefix');
1110                 if ($this->mFlags & DBO_SYSDBA) {
1111                         $varnames[] = 'wgDBOracleDefTS';
1112                         $varnames[] = 'wgDBOracleTempTS';
1113                 }
1114
1115                 // Ordinary variables
1116                 foreach ( $varnames as $var ) {
1117                         if( isset( $GLOBALS[$var] ) ) {
1118                                 $val = addslashes( $GLOBALS[$var] ); // FIXME: safety check?
1119                                 $ins = str_replace( '{$' . $var . '}', $val, $ins );
1120                                 $ins = str_replace( '/*$' . $var . '*/`', '`' . $val, $ins );
1121                                 $ins = str_replace( '/*$' . $var . '*/', $val, $ins );
1122                         }
1123                 }
1124
1125                 return parent::replaceVars($ins);
1126         }
1127
1128         public function getSearchEngine() {
1129                 return "SearchOracle";
1130         }
1131 } // end DatabaseOracle class