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