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 = false, $user = false, $password = false, $dbName = false,
 212                 $failFunction = false, $flags = 0)
 213         {
 214                 return new DatabaseOracle( $server, $user, $password, $dbName, $failFunction, $flags );
 215         }
 216
 217         /**
 218          * Usually aborts on failure
 219          * If the failFunction is set to a non-zero integer, returns success
 220          */
 221         function open( $server, $user, $password, $dbName ) {
 222                 if ( !function_exists( 'oci_connect' ) ) {
 223                         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" );
 224                 }
 225
 226                 putenv("NLS_LANG=AMERICAN_AMERICA.AL32UTF8");
 227
 228                 $this->close();
 229                 $this->mServer = $server;
 230                 $this->mUser = $user;
 231                 $this->mPassword = $password;
 232                 $this->mDBname = $dbName;
 233
 234                 if (!strlen($user)) { ## e.g. the class is being loaded
 235                 return;
 236                 }
 237
 238                 //error_reporting( E_ALL ); //whoever had this bright idea
 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, null, $session_mode);
 242                 else
 243                         $this->mConn = oci_connect($user, $password, $dbName, null, $session_mode);
 244
 245                 if ($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
 258                 return $this->mConn;
 259         }
 260
 261         /**
 262          * Closes a database connection, if it is open
 263          * Returns success, true if already closed
 264          */
 265         function close() {
 266                 $this->mOpened = false;
 267                 if ( $this->mConn ) {
 268                         return oci_close( $this->mConn );
 269                 } else {
 270                         return true;
 271                 }
 272         }
 273
 274         function execFlags() {
 275                 return $this->mTrxLevel ? OCI_DEFAULT : OCI_COMMIT_ON_SUCCESS;
 276         }
 277
 278         function doQuery($sql) {
 279                 wfDebug("SQL: [$sql]\n");
 280                 if (!mb_check_encoding($sql)) {
 281                         throw new MWException("SQL encoding is invalid");
 282                 }
 283
 284                 //handle some oracle specifics
 285                 //remove AS column/table/subquery namings
 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                 $explain_id = date('dmYHis');
 293                 $sql = preg_replace('/^EXPLAIN /', 'EXPLAIN PLAN SET STATEMENT_ID = \''.$explain_id.'\' FOR', $sql, 1, $explain_count);
 294
 295
 296                 if (($this->mLastResult = $stmt = oci_parse($this->mConn, $sql)) === false) {
 297                         $e = oci_error($this->mConn);
 298                         $this->reportQueryError($e['message'], $e['code'], $sql, __FUNCTION__);
 299                 }
 300
 301                 $olderr = error_reporting(E_ERROR);
 302                 if (oci_execute($stmt, $this->execFlags()) == false) {
 303                         $e = oci_error($stmt);
 304                         if (!$this->ignore_DUP_VAL_ON_INDEX || $e['code'] != '1')
 305                                 $this->reportQueryError($e['message'], $e['code'], $sql, __FUNCTION__);
 306                 }
 307                 error_reporting($olderr);
 308
 309                 if ($explain_count > 0) {
 310                         return $this->doQuery('SELECT id, cardinality "ROWS" FROM plan_table WHERE statement_id = \''.$explain_id.'\'');
 311                 } elseif (oci_statement_type($stmt) == "SELECT") {
 312                         return new ORAResult($this, $stmt, $union_unique);
 313                 } else {
 314                         $this->mAffectedRows = oci_num_rows($stmt);
 315                         return true;
 316                 }
 317         }
 318
 319         function queryIgnore($sql, $fname = '') {
 320                 return $this->query($sql, $fname, true);
 321         }
 322
 323         function freeResult($res) {
 324                 if ( $res instanceof ORAResult ) {
 325                         $res->free();
 326                 } else {
 327                         $res->result->free();
 328                 }
 329         }
 330
 331         function fetchObject($res) {
 332                 if ( $res instanceof ORAResult ) {
 333                         return $res->numRows();
 334                 } else {
 335                         return $res->result->fetchObject();
 336                 }
 337         }
 338
 339         function fetchRow($res) {
 340                 if ( $res instanceof ORAResult ) {
 341                         return $res->fetchRow();
 342                 } else {
 343                         return $res->result->fetchRow();
 344                 }
 345         }
 346
 347         function numRows($res) {
 348                 if ( $res instanceof ORAResult ) {
 349                         return $res->numRows();
 350                 } else {
 351                         return $res->result->numRows();
 352                 }
 353         }
 354
 355         function numFields($res) {
 356                 if ( $res instanceof ORAResult ) {
 357                         return $res->numFields();
 358                 } else {
 359                         return $res->result->numFields();
 360                 }
 361         }
 362
 363         function fieldName($stmt, $n) {
 364                 return oci_field_name($stmt, $n);
 365         }
 366
 367         /**
 368          * This must be called after nextSequenceVal
 369          */
 370         function insertId() {
 371                 return $this->mInsertId;
 372         }
 373
 374         function dataSeek($res, $row) {
 375                 if ( $res instanceof ORAResult ) {
 376                         $res->seek($row);
 377                 } else {
 378                         $res->result->seek($row);
 379                 }
 380         }
 381
 382         function lastError() {
 383                 if ($this->mConn === false)
 384                         $e = oci_error();
 385                 else
 386                         $e = oci_error($this->mConn);
 387                 return $e['message'];
 388         }
 389
 390         function lastErrno() {
 391                 if ($this->mConn === false)
 392                         $e = oci_error();
 393                 else
 394                         $e = oci_error($this->mConn);
 395                 return $e['code'];
 396         }
 397
 398         function affectedRows() {
 399                 return $this->mAffectedRows;
 400         }
 401
 402         /**
 403          * Returns information about an index
 404          * If errors are explicitly ignored, returns NULL on failure
 405          */
 406         function indexInfo( $table, $index, $fname = 'DatabaseOracle::indexExists' ) {
 407                 return false;
 408         }
 409
 410         function indexUnique ($table, $index, $fname = 'DatabaseOracle::indexUnique' ) {
 411                 return false;
 412         }
 413
 414         function insert( $table, $a, $fname = 'DatabaseOracle::insert', $options = array() ) {
 415                 if ( !count( $a ) )
 416                         return true;
 417
 418                 if (!is_array($options))
 419                         $options = array($options);
 420
 421     if (in_array('IGNORE', $options))
 422                         $this->ignore_DUP_VAL_ON_INDEX = true;
 423
 424                 if (!is_array(reset($a))) {
 425                         $a = array($a);
 426                 }
 427                 foreach ($a as $row) {
 428                         $this->insertOneRow($table, $row, $fname);
 429                 }
 430                 $retVal = true;
 431
 432                 if (in_array('IGNORE', $options))
 433                         $this->ignore_DUP_VAL_ON_INDEX = false;
 434
 435                 return $retVal;
 436         }
 437
 438         function insertOneRow($table, $row, $fname) {
 439                 global $wgLang;
 440
 441                 // "INSERT INTO tables (a, b, c)"
 442                 $sql = "INSERT INTO " . $this->tableName($table) . " (" . join(',', array_keys($row)) . ')';
 443                 $sql .= " VALUES (";
 444
 445                 // for each value, append ":key"
 446                 $first = true;
 447                 foreach ($row as $col => $val) {
 448                         if ($first)
 449                                 $sql .= ':'.$col;
 450                         else
 451                                 $sql.= ', :'.$col;
 452
 453                         $first = false;
 454                 }
 455                 $sql .= ')';
 456
 457                 $stmt = oci_parse($this->mConn, $sql);
 458                 foreach ($row as $col => $val) {
 459                         if (!is_object($val)) {
 460                                 if (oci_bind_by_name($stmt, ":$col", $row[$col]) === false)
 461                                         $this->reportQueryError($this->lastErrno(), $this->lastError(), $sql, __METHOD__);
 462                         }
 463                 }
 464
 465                 $stmt = oci_parse($this->mConn, $sql);
 466                 foreach ($row as $col => $val) {
 467                         $col_type=$this->fieldInfo($this->tableName($table), $col)->type();
 468                         if ($col_type != 'BLOB' && $col_type != 'CLOB') {
 469                                 if (is_object($val))
 470                                         $val = $val->getData();
 471
 472                                 if (preg_match('/^timestamp.*/i', $col_type) == 1 && strtolower($val) == 'infinity')
 473                                         $val = '31-12-2030 12:00:00.000000';
 474
 475                                 if (oci_bind_by_name($stmt, ":$col", $wgLang->checkTitleEncoding($val)) === false)
 476                                         $this->reportQueryError($this->lastErrno(), $this->lastError(), $sql, __METHOD__);
 477                         } else {
 478                                 if (($lob[$col] = oci_new_descriptor($this->mConn, OCI_D_LOB)) === false) {
 479                                         $e = oci_error($stmt);
 480                                         throw new DBUnexpectedError($this, "Cannot create LOB descriptor: " . $e['message']);
 481                                 }
 482
 483                                 if (is_object($val)) {
 484                                         $lob[$col]->writeTemporary($val->getData());
 485                                         oci_bind_by_name($stmt, ":$col", $lob[$col], -1, SQLT_BLOB);
 486                                 } else {
 487                                         $lob[$col]->writeTemporary($val);
 488                                         oci_bind_by_name($stmt, ":$col", $lob[$col], -1, OCI_B_CLOB);
 489                                 }
 490                         }
 491                 }
 492
 493                 $olderr = error_reporting(E_ERROR);
 494                 if (oci_execute($stmt, OCI_DEFAULT) === false) {
 495                         $e = oci_error($stmt);
 496
 497                         if (!$this->ignore_DUP_VAL_ON_INDEX || $e['code'] != '1')
 498                                 $this->reportQueryError($e['message'], $e['code'], $sql, __METHOD__);
 499                         else
 500                                 $this->mAffectedRows = oci_num_rows($stmt);
 501                 } else
 502                         $this->mAffectedRows = oci_num_rows($stmt);
 503                 error_reporting($olderr);
 504
 505                 if (isset($lob)){
 506                         foreach ($lob as $lob_i => $lob_v) {
 507                                 $lob_v->free();
 508                         }
 509                 }
 510
 511                 if (!$this->mTrxLevel)
 512                         oci_commit($this->mConn);
 513
 514                 oci_free_statement($stmt);
 515         }
 516
 517         function insertSelect( $destTable, $srcTable, $varMap, $conds, $fname = 'DatabaseOracle::insertSelect',
 518                 $insertOptions = array(), $selectOptions = array() )
 519         {
 520                 $destTable = $this->tableName( $destTable );
 521                 if( !is_array( $selectOptions ) ) {
 522                         $selectOptions = array( $selectOptions );
 523                 }
 524                 list( $startOpts, $useIndex, $tailOpts ) = $this->makeSelectOptions( $selectOptions );
 525                 if( is_array( $srcTable ) ) {
 526                         $srcTable =  implode( ',', array_map( array( &$this, 'tableName' ), $srcTable ) );
 527                 } else {
 528                         $srcTable = $this->tableName( $srcTable );
 529                 }
 530
 531                 if (($sequenceData = $this->getSequenceData($destTable)) !== false &&
 532                                 !isset($varMap[$sequenceData['column']]))
 533                         $varMap[$sequenceData['column']] = 'GET_SEQUENCE_VALUE(\''.$sequenceData['sequence'].'\')';
 534
 535                 // count-alias subselect fields to avoid abigious definition errors
 536                 $i=0;
 537                 foreach($varMap as $key=>&$val)
 538                         $val=$val.' field'.($i++);
 539
 540                 $sql = "INSERT INTO $destTable (" . implode( ',', array_keys( $varMap ) ) . ')' .
 541                         " SELECT $startOpts " . implode( ',', $varMap ) .
 542                         " FROM $srcTable $useIndex ";
 543                 if ( $conds != '*' ) {
 544                         $sql .= ' WHERE ' . $this->makeList( $conds, LIST_AND );
 545                 }
 546                 $sql .= " $tailOpts";
 547
 548                 if (in_array('IGNORE', $insertOptions))
 549                         $this->ignore_DUP_VAL_ON_INDEX = true;
 550
 551                 $retval = $this->query( $sql, $fname );
 552
 553                 if (in_array('IGNORE', $insertOptions))
 554                         $this->ignore_DUP_VAL_ON_INDEX = false;
 555
 556                 return $retval;
 557         }
 558
 559         function tableName( $name ) {
 560                 global $wgSharedDB, $wgSharedPrefix, $wgSharedTables;
 561                 /*
 562                 Replace reserved words with better ones
 563                 Useing uppercase, because that's the only way oracle can handle
 564                 quoted tablenames
 565                 */
 566                 switch( $name ) {
 567                         case 'user':
 568                                 $name = 'MWUSER'; break;
 569                         case 'text':
 570                                 $name = 'PAGECONTENT'; break;
 571                 }
 572
 573                 /*
 574                         The rest of procedure is equal to generic Databse class
 575                         except for the quoting style
 576                 */
 577                 if ( $name[0] == '"' && substr( $name, -1, 1 ) == '"' ) return $name;
 578
 579                 if( preg_match( '/(^|\s)(DISTINCT|JOIN|ON|AS)(\s|$)/i', $name ) !== 0 ) return $name;
 580                 $dbDetails = array_reverse( explode( '.', $name, 2 ) );
 581                 if( isset( $dbDetails[1] ) ) @list( $table, $database ) = $dbDetails;
 582                 else                         @list( $table ) = $dbDetails;
 583
 584                 $prefix = $this->mTablePrefix;
 585
 586                 if( isset($database) ) $table = ( $table[0] == '`' ? $table : "`{$table}`" );
 587
 588                 if( !isset( $database )
 589                  && isset( $wgSharedDB )
 590                  && $table[0] != '"'
 591                  && isset( $wgSharedTables )
 592                  && is_array( $wgSharedTables )
 593                  && in_array( $table, $wgSharedTables ) ) {
 594                         $database = $wgSharedDB;
 595                         $prefix   = isset( $wgSharedPrefix ) ? $wgSharedPrefix : $prefix;
 596                 }
 597
 598                 if( isset($database) ) $database = ( $database[0] == '"' ? $database : "\"{$database}\"" );
 599                 $table = ( $table[0] == '"' ? $table : "\"{$prefix}{$table}\"" );
 600
 601                 $tableName = ( isset($database) ? "{$database}.{$table}" : "{$table}" );
 602
 603                 return strtoupper($tableName);
 604         }
 605
 606         /**
 607          * Return the next in a sequence, save the value for retrieval via insertId()
 608          */
 609         function nextSequenceValue($seqName) {
 610                 $res = $this->query("SELECT $seqName.nextval FROM dual");
 611                 $row = $this->fetchRow($res);
 612                 $this->mInsertId = $row[0];
 613                 $this->freeResult($res);
 614                 return $this->mInsertId;
 615         }
 616
 617         /**
 618          * Return sequence_name if table has a sequence
 619          */
 620         function getSequenceData($table) {
 621                 if ($this->sequenceData == NULL) {
 622                         $result = $this->query("SELECT lower(us.sequence_name), lower(utc.table_name), lower(utc.column_name) from user_sequences us, user_tab_columns utc where us.sequence_name = utc.table_name||'_'||utc.column_name||'_SEQ'");
 623
 624                         while(($row = $result->fetchRow()) !== false)
 625                                 $this->sequenceData[$this->tableName($row[1])] = array('sequence' => $row[0], 'column' => $row[2]);
 626                 }
 627
 628                 return (isset($this->sequenceData[$table])) ? $this->sequenceData[$table] : false;
 629         }
 630
 631
 632         # REPLACE query wrapper
 633         # Oracle simulates this with a DELETE followed by INSERT
 634         # $row is the row to insert, an associative array
 635         # $uniqueIndexes is an array of indexes. Each element may be either a
 636         # field name or an array of field names
 637         #
 638         # It may be more efficient to leave off unique indexes which are unlikely to collide.
 639         # However if you do this, you run the risk of encountering errors which wouldn't have
 640         # occurred in MySQL
 641         function replace( $table, $uniqueIndexes, $rows, $fname = 'DatabaseOracle::replace' ) {
 642                 $table = $this->tableName($table);
 643
 644                 if (count($rows)==0) {
 645                         return;
 646                 }
 647
 648                 # Single row case
 649                 if (!is_array(reset($rows))) {
 650                         $rows = array($rows);
 651                 }
 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                         # Now insert the row
 684                         $this->insert( $table, $row, $fname );
 685                 }
 686         }
 687
 688         # DELETE where the condition is a join
 689         function deleteJoin( $delTable, $joinTable, $delVar, $joinVar, $conds, $fname = "DatabaseOracle::deleteJoin" ) {
 690                 if ( !$conds ) {
 691                         throw new DBUnexpectedError($this,  'DatabaseOracle::deleteJoin() called with empty $conds' );
 692                 }
 693
 694                 $delTable = $this->tableName( $delTable );
 695                 $joinTable = $this->tableName( $joinTable );
 696                 $sql = "DELETE FROM $delTable WHERE $delVar IN (SELECT $joinVar FROM $joinTable ";
 697                 if ( $conds != '*' ) {
 698                         $sql .= 'WHERE ' . $this->makeList( $conds, LIST_AND );
 699                 }
 700                 $sql .= ')';
 701
 702                 $this->query( $sql, $fname );
 703         }
 704
 705         # Returns the size of a text field, or -1 for "unlimited"
 706         function textFieldSize( $table, $field ) {
 707                 $table = $this->tableName( $table );
 708                 $sql = "SELECT t.typname as ftype,a.atttypmod as size
 709                         FROM pg_class c, pg_attribute a, pg_type t
 710                         WHERE relname='$table' AND a.attrelid=c.oid AND
 711                                 a.atttypid=t.oid and a.attname='$field'";
 712                 $res =$this->query($sql);
 713                 $row=$this->fetchObject($res);
 714                 if ($row->ftype=="varchar") {
 715                         $size=$row->size-4;
 716                 } else {
 717                         $size=$row->size;
 718                 }
 719                 $this->freeResult( $res );
 720                 return $size;
 721         }
 722
 723         function limitResult($sql, $limit, $offset) {
 724                 if ($offset === false)
 725                         $offset = 0;
 726                 return "SELECT * FROM ($sql) WHERE rownum >= (1 + $offset) AND rownum < (1 + $limit + $offset)";
 727         }
 728
 729
 730         function unionQueries($sqls, $all = false) {
 731                 $glue = ' UNION ALL ';
 732                 return 'SELECT * '.($all?'':'/* UNION_UNIQUE */ ').'FROM ('.implode( $glue, $sqls ).')' ;
 733         }
 734
 735         function wasDeadlock() {
 736                 return $this->lastErrno() == 'OCI-00060';
 737         }
 738
 739         function timestamp($ts = 0) {
 740                 return wfTimestamp(TS_ORACLE, $ts);
 741         }
 742
 743         /**
 744          * Return aggregated value function call
 745          */
 746         function aggregateValue ($valuedata,$valuename='value') {
 747                 return $valuedata;
 748         }
 749
 750         function reportQueryError($error, $errno, $sql, $fname, $tempIgnore = false) {
 751                 # Ignore errors during error handling to avoid infinite
 752                 # recursion
 753                 $ignore = $this->ignoreErrors(true);
 754                 ++$this->mErrorCount;
 755
 756                 if ($ignore || $tempIgnore) {
 757 //echo "error ignored! query = [$sql]\n";
 758                         wfDebug("SQL ERROR (ignored): $error\n");
 759                         $this->ignoreErrors( $ignore );
 760                 }
 761                 else {
 762 //echo "error!\n";
 763                         $message = "A database error has occurred\n" .
 764                                 "Query: $sql\n" .
 765                                 "Function: $fname\n" .
 766                                 "Error: $errno $error\n";
 767                         throw new DBUnexpectedError($this, $message);
 768                 }
 769         }
 770
 771         /**
 772          * @return string wikitext of a link to the server software's web site
 773          */
 774         function getSoftwareLink() {
 775                 return "[http://www.oracle.com/ Oracle]";
 776         }
 777
 778         /**
 779          * @return string Version information from the database
 780          */
 781         function getServerVersion() {
 782                 return oci_server_version($this->mConn);
 783         }
 784
 785         /**
 786          * Query whether a given table exists (in the given schema, or the default mw one if not given)
 787          */
 788         function tableExists($table) {
 789                 $SQL = "SELECT 1 FROM user_tables WHERE table_name='$table'";
 790                 $res = $this->doQuery($SQL);
 791                 if ($res) {
 792                         $count = $res->numRows();
 793                         $res->free();
 794                 } else {
 795                         $count = 0;
 796                 }
 797                 return $count;
 798         }
 799
 800         /**
 801          * Query whether a given column exists in the mediawiki schema
 802          * based on prebuilt table to simulate MySQL field info and keep query speed minimal
 803          */
 804         function fieldExists( $table, $field ) {
 805                 if (!isset($this->fieldInfo_stmt))
 806                         $this->fieldInfo_stmt = oci_parse($this->mConn, 'SELECT * FROM wiki_field_info_full WHERE table_name = upper(:tab) and column_name = UPPER(:col)');
 807
 808                 oci_bind_by_name($this->fieldInfo_stmt, ':tab', trim($table, '"'));
 809                 oci_bind_by_name($this->fieldInfo_stmt, ':col', $field);
 810
 811                 if (oci_execute($this->fieldInfo_stmt, OCI_DEFAULT) === false) {
 812                         $e = oci_error($this->fieldInfo_stmt);
 813                         $this->reportQueryError($e['message'], $e['code'], 'fieldInfo QUERY', __METHOD__);
 814                         return false;
 815                 }
 816                 $res = new ORAResult($this,$this->fieldInfo_stmt);
 817                 return $res->numRows() != 0;
 818         }
 819
 820         function fieldInfo( $table, $field ) {
 821                 if (!isset($this->fieldInfo_stmt))
 822                         $this->fieldInfo_stmt = oci_parse($this->mConn, 'SELECT * FROM wiki_field_info_full WHERE table_name = upper(:tab) and column_name = UPPER(:col)');
 823
 824                 oci_bind_by_name($this->fieldInfo_stmt, ':tab', trim($table, '"'));
 825                 oci_bind_by_name($this->fieldInfo_stmt, ':col', $field);
 826
 827                 if (oci_execute($this->fieldInfo_stmt, OCI_DEFAULT) === false) {
 828                         $e = oci_error($this->fieldInfo_stmt);
 829                         $this->reportQueryError($e['message'], $e['code'], 'fieldInfo QUERY', __METHOD__);
 830                         return false;
 831                 }
 832                 $res = new ORAResult($this,$this->fieldInfo_stmt);
 833                 return new ORAField($res->fetchRow());
 834         }
 835
 836         function begin( $fname = '' ) {
 837                 $this->mTrxLevel = 1;
 838         }
 839         function immediateCommit( $fname = '' ) {
 840                 return true;
 841         }
 842         function commit( $fname = '' ) {
 843                 oci_commit($this->mConn);
 844                 $this->mTrxLevel = 0;
 845         }
 846
 847         /* Not even sure why this is used in the main codebase... */
 848         function limitResultForUpdate($sql, $num) {
 849                 return $sql;
 850         }
 851
 852         /* defines must comply with ^define\s*([^\s=]*)\s*=\s?'\{\$([^\}]*)\}'; */
 853         function sourceStream( $fp, $lineCallback = false, $resultCallback = false ) {
 854                 $cmd = "";
 855                 $done = false;
 856                 $dollarquote = false;
 857
 858                 $replacements = array();
 859
 860                 while ( ! feof( $fp ) ) {
 861                         if ( $lineCallback ) {
 862                                 call_user_func( $lineCallback );
 863                         }
 864                         $line = trim( fgets( $fp, 1024 ) );
 865                         $sl = strlen( $line ) - 1;
 866
 867                         if ( $sl < 0 ) { continue; }
 868                         if ( '-' == $line{0} && '-' == $line{1} ) { continue; }
 869
 870                         // Allow dollar quoting for function declarations
 871                         if (substr($line,0,8) == '/*$mw$*/') {
 872                                 if ($dollarquote) {
 873                                         $dollarquote = false;
 874                                         $done = true;
 875                                 }
 876                                 else {
 877                                         $dollarquote = true;
 878                                 }
 879                         }
 880                         else if (!$dollarquote) {
 881                                 if ( ';' == $line{$sl} && ($sl < 2 || ';' != $line{$sl - 1})) {
 882                                         $done = true;
 883                                         $line = substr( $line, 0, $sl );
 884                                 }
 885                         }
 886
 887                         if ( '' != $cmd ) { $cmd .= ' '; }
 888                         $cmd .= "$line\n";
 889
 890                         if ( $done ) {
 891                                 $cmd = str_replace(';;', ";", $cmd);
 892                                 if (strtolower(substr($cmd, 0, 6)) == 'define' ) {
 893                                         if (preg_match('/^define\s*([^\s=]*)\s*=\s*\'\{\$([^\}]*)\}\'/', $cmd, $defines)) {
 894                                                 $replacements[$defines[2]] = $defines[1];
 895                                         }
 896                                 } else {
 897                                         foreach ( $replacements as $mwVar=>$scVar ) {
 898                                                 $cmd = str_replace( '&' . $scVar . '.', '{$'.$mwVar.'}', $cmd );
 899                                         }
 900
 901                                         $cmd = $this->replaceVars( $cmd );
 902                                         $res = $this->query( $cmd, __METHOD__ );
 903                                         if ( $resultCallback ) {
 904                                                 call_user_func( $resultCallback, $res, $this );
 905                                         }
 906
 907                                         if ( false === $res ) {
 908                                                 $err = $this->lastError();
 909                                                 return "Query \"{$cmd}\" failed with error code \"$err\".\n";
 910                                         }
 911                                 }
 912
 913                                 $cmd = '';
 914                                 $done = false;
 915                         }
 916                 }
 917                 return true;
 918         }
 919
 920         function setup_database() {
 921                 global $wgVersion, $wgDBmwschema, $wgDBts2schema, $wgDBport, $wgDBuser;
 922
 923                 echo "<li>Creating DB objects</li>\n";
 924                 $res = $this->sourceFile( "../maintenance/ora/tables.sql" );
 925
 926                 // Avoid the non-standard "REPLACE INTO" syntax
 927                 echo "<li>Populating table interwiki</li>\n";
 928                 $f = fopen( "../maintenance/interwiki.sql", 'r' );
 929                 if ($f == false ) {
 930                         dieout( "<li>Could not find the interwiki.sql file</li>");
 931                 }
 932
 933                 //do it like the postgres :D
 934                 $SQL = "INSERT INTO interwiki(iw_prefix,iw_url,iw_local) VALUES ";
 935                 while ( ! feof( $f ) ) {
 936                         $line = fgets($f,1024);
 937                         $matches = array();
 938                         if (!preg_match('/^\s*(\(.+?),(\d)\)/', $line, $matches)) {
 939                                 continue;
 940                         }
 941                         $this->query("$SQL $matches[1],$matches[2])");
 942                 }
 943
 944                 echo "<li>Table interwiki successfully populated</li>\n";
 945         }
 946
 947         function strencode($s) {
 948                 return str_replace("'", "''", $s);
 949         }
 950
 951         function encodeBlob($b) {
 952                 return new ORABlob($b);
 953         }
 954         function decodeBlob($b) {
 955                 return $b; //return $b->load();
 956         }
 957
 958         function addQuotes( $s ) {
 959                 global $wgLang;
 960                 if (isset($wgLang->mLoaded) && $wgLang->mLoaded)
 961                         $s = $wgLang->checkTitleEncoding($s);
 962                 return "'" . $this->strencode($s) . "'";
 963         }
 964
 965         function quote_ident( $s ) {
 966                 return $s;
 967         }
 968
 969         function selectRow( $table, $vars, $conds, $fname = 'DatabaseOracle::selectRow', $options = array(), $join_conds = array() ) {
 970                 if (is_array($table))
 971                         foreach ($table as $tab)
 972                                 $tab = $this->tableName($tab);
 973                 else
 974                         $table = $this->tableName($table);
 975                 return parent::selectRow($table, $vars, $conds, $fname, $options, $join_conds);
 976         }
 977
 978         /**
 979          * Returns an optional USE INDEX clause to go after the table, and a
 980          * string to go at the end of the query
 981          *
 982          * @private
 983          *
 984          * @param $options Array: an associative array of options to be turned into
 985          *              an SQL query, valid keys are listed in the function.
 986          * @return array
 987          */
 988         function makeSelectOptions( $options ) {
 989                 $preLimitTail = $postLimitTail = '';
 990                 $startOpts = '';
 991
 992                 $noKeyOptions = array();
 993                 foreach ( $options as $key => $option ) {
 994                         if ( is_numeric( $key ) ) {
 995                                 $noKeyOptions[$option] = true;
 996                         }
 997                 }
 998
 999                 if ( isset( $options['GROUP BY'] ) ) $preLimitTail .= " GROUP BY {$options['GROUP BY']}";
1000                 if ( isset( $options['ORDER BY'] ) ) $preLimitTail .= " ORDER BY {$options['ORDER BY']}";
1001
1002                 #if ( isset( $noKeyOptions['FOR UPDATE'] ) ) $tailOpts .= ' FOR UPDATE';
1003                 #if ( isset( $noKeyOptions['LOCK IN SHARE MODE'] ) ) $tailOpts .= ' LOCK IN SHARE MODE';
1004                 if ( isset( $noKeyOptions['DISTINCT'] ) || isset( $noKeyOptions['DISTINCTROW'] ) ) $startOpts .= 'DISTINCT';
1005
1006                 if ( isset( $options['USE INDEX'] ) && ! is_array( $options['USE INDEX'] ) ) {
1007                         $useIndex = $this->useIndexClause( $options['USE INDEX'] );
1008                 } else {
1009                         $useIndex = '';
1010                 }
1011
1012                 return array( $startOpts, $useIndex, $preLimitTail, $postLimitTail );
1013         }
1014
1015         public function delete( $table, $conds, $fname = 'DatabaseOracle::delete' ) {
1016
1017                 $conds2 = array();
1018                 foreach($conds as $col=>$val) {
1019                         $col_type=$this->fieldInfo($this->tableName($table), $col)->type();
1020                         if ($col_type == 'CLOB')
1021                                 $conds2['TO_CHAR('.$col.')'] = $val;
1022                         else
1023                                 $conds2[$col] = $val;
1024                 }
1025
1026                 return parent::delete( $table, $conds2, $fname );
1027         }
1028
1029         function bitNot($field) {
1030                 //expecting bit-fields smaller than 4bytes
1031                 return 'BITNOT('.$bitField.')';
1032         }
1033
1034         function bitAnd($fieldLeft, $fieldRight) {
1035                 return 'BITAND('.$fieldLeft.', '.$fieldRight.')';
1036         }
1037
1038         function bitOr($fieldLeft, $fieldRight) {
1039                 return 'BITOR('.$fieldLeft.', '.$fieldRight.')';
1040         }
1041
1042         /**
1043          * How lagged is this slave?
1044          *
1045          * @return int
1046          */
1047         public function getLag() {
1048                 # Not implemented for Oracle
1049                 return 0;
1050         }
1051
1052         function setFakeSlaveLag( $lag ) {}
1053         function setFakeMaster( $enabled = true ) {}
1054
1055         function getDBname() {
1056                 return $this->mDBname;
1057         }
1058
1059         function getServer() {
1060                 return $this->mServer;
1061         }
1062
1063         public function replaceVars( $ins ) {
1064                 $varnames = array('wgDBprefix');
1065                 if ($this->mFlags & DBO_SYSDBA) {
1066                         $varnames[] = 'wgDBOracleDefTS';
1067                         $varnames[] = 'wgDBOracleTempTS';
1068                 }
1069
1070                 // Ordinary variables
1071                 foreach ( $varnames as $var ) {
1072                         if( isset( $GLOBALS[$var] ) ) {
1073                                 $val = addslashes( $GLOBALS[$var] ); // FIXME: safety check?
1074                                 $ins = str_replace( '{$' . $var . '}', $val, $ins );
1075                                 $ins = str_replace( '/*$' . $var . '*/`', '`' . $val, $ins );
1076                                 $ins = str_replace( '/*$' . $var . '*/', $val, $ins );
1077                         }
1078                 }
1079
1080                 return parent::replaceVars($ins);
1081         }
1082
1083         public function getSearchEngine() {
1084                 return "SearchOracle";
1085         }
1086 } // end DatabaseOracle class