* addressed r53282#c3209 moved conditional inclusion of $wgExtensionMessages in mwScr...
[lhc/web/wiklou.git] / includes / db / DatabaseOracle.php
index d03298e..634a68a 100644 (file)
@@ -31,40 +31,46 @@ class ORAResult {
        private $cursor;
        private $stmt;
        private $nrows;
-       private $db;
 
-       function __construct(&$db, $stmt) {
+       private $unique;
+
+       function __construct(&$db, $stmt, $unique = false) {
                $this->db =& $db;
+
                if (($this->nrows = oci_fetch_all($stmt, $this->rows, 0, -1, OCI_FETCHSTATEMENT_BY_ROW | OCI_NUM)) === false) {
                        $e = oci_error($stmt);
                        $db->reportQueryError($e['message'], $e['code'], '', __FUNCTION__);
                        return;
                }
 
+               if ($unique) {
+                       $this->rows = array_unique($this->rows);
+                       $this->nrows = count($this->rows);
+               }
+
                $this->cursor = 0;
                $this->stmt = $stmt;
        }
 
-       function free() {
+       public function free() {
                oci_free_statement($this->stmt);
        }
 
-       function seek($row) {
+       public function seek($row) {
                $this->cursor = min($row, $this->nrows);
        }
 
-       function numRows() {
+       public function numRows() {
                return $this->nrows;
        }
 
-       function numFields() {
+       public function numFields() {
                return oci_num_fields($this->stmt);
        }
 
-       function fetchObject() {
+       public function fetchObject() {
                if ($this->cursor >= $this->nrows)
                        return false;
-
                $row = $this->rows[$this->cursor++];
                $ret = new stdClass();
                foreach ($row as $k => $v) {
@@ -75,7 +81,7 @@ class ORAResult {
                return $ret;
        }
 
-       function fetchAssoc() {
+       public function fetchRow() {
                if ($this->cursor >= $this->nrows)
                        return false;
 
@@ -90,10 +96,64 @@ class ORAResult {
        }
 }
 
+/**
+ * Utility class.
+ * @ingroup Database
+ */
+class ORAField {
+       private $name, $tablename, $default, $max_length, $nullable,
+               $is_pk, $is_unique, $is_multiple, $is_key, $type;
+
+       function __construct($info) {
+               $this->name = $info['column_name'];
+               $this->tablename = $info['table_name'];
+               $this->default = $info['data_default'];
+               $this->max_length = $info['data_length'];
+               $this->nullable = $info['not_null'];
+               $this->is_pk = isset($info['prim']) && $info['prim'] == 1 ? 1 : 0;
+               $this->is_unique = isset($info['uniq']) && $info['uniq'] == 1 ? 1 : 0;
+               $this->is_multiple = isset($info['nonuniq']) && $info['nonuniq'] == 1 ? 1 : 0;
+               $this->is_key = ($this->is_pk || $this->is_unique || $this->is_multiple);
+               $this->type = $info['data_type'];
+       }
+       function name() {
+               return $this->name;
+       }
+
+       function tableName() {
+               return $this->tablename;
+       }
+
+       function defaultValue() {
+               return $this->default;
+       }
+
+       function maxLength() {
+               return $this->max_length;
+       }
+
+       function nullable() {
+               return $this->nullable;
+       }
+       
+       function isKey() {
+               return $this->is_key;
+       }
+
+       function isMultipleKey() {
+               return $this->is_multiple;
+       }
+
+       function type() {
+               return $this->type;
+       }
+}
+
 /**
  * @ingroup Database
  */
-class DatabaseOracle extends Database {
+class DatabaseOracle extends DatabaseBase {
        var $mInsertId = NULL;
        var $mLastResult = NULL;
        var $numeric_version = NULL;
@@ -101,20 +161,14 @@ class DatabaseOracle extends Database {
        var $cursor = 0;
        var $mAffectedRows;
 
+       var $ignore_DUP_VAL_ON_INDEX = false;
+
        function DatabaseOracle($server = false, $user = false, $password = false, $dbName = false,
-               $failFunction = false, $flags = 0 )
+               $failFunction = false, $flags = 0, $tablePrefix = 'get from global' )
        {
-
-               global $wgOut;
-               # Can't get a reference if it hasn't been set yet
-               if ( !isset( $wgOut ) ) {
-                       $wgOut = NULL;
-               }
-               $this->mOut =& $wgOut;
-               $this->mFailFunction = $failFunction;
-               $this->mFlags = $flags;
-               $this->open( $server, $user, $password, $dbName);
-
+               $tablePrefix = $tablePrefix == 'get from global' ? $tablePrefix : strtoupper($tablePrefix);
+               parent::__construct($server, $user, $password, $dbName, $failFunction, $flags, $tablePrefix);
+               wfRunHooks( 'DatabaseOraclePostInit', array(&$this));
        }
 
        function cascadingDeletes() {
@@ -153,8 +207,7 @@ class DatabaseOracle extends Database {
                if ( !function_exists( 'oci_connect' ) ) {
                        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" );
                }
-
-               # Needed for proper UTF-8 functionality
+               
                putenv("NLS_LANG=AMERICAN_AMERICA.AL32UTF8");
 
                $this->close();
@@ -164,11 +217,15 @@ class DatabaseOracle extends Database {
                $this->mDBname = $dbName;
 
                if (!strlen($user)) { ## e.g. the class is being loaded
-                       return;
+               return;
                }
 
-               error_reporting( E_ALL );
-               $this->mConn = oci_connect($user, $password, $dbName);
+               //error_reporting( E_ALL ); //whoever had this bright idea
+               $session_mode = $this->mFlags & DBO_SYSDBA ? OCI_SYSDBA : OCI_DEFAULT;
+               if ( $this->mFlags & DBO_DEFAULT )
+                       $this->mConn = oci_new_connect($user, $password, $dbName, null, $session_mode);
+               else
+                       $this->mConn = oci_connect($user, $password, $dbName, null, $session_mode);
 
                if ($this->mConn == false) {
                        wfDebug("DB connection error\n");
@@ -178,6 +235,11 @@ class DatabaseOracle extends Database {
                }
 
                $this->mOpened = true;
+               
+               #removed putenv calls because they interfere with the system globaly
+               $this->doQuery('ALTER SESSION SET NLS_TIMESTAMP_FORMAT=\'DD-MM-YYYY HH24:MI:SS.FF6\'');
+               $this->doQuery('ALTER SESSION SET NLS_TIMESTAMP_TZ_FORMAT=\'DD-MM-YYYY HH24:MI:SS.FF6\'');
+               
                return $this->mConn;
        }
 
@@ -204,18 +266,36 @@ class DatabaseOracle extends Database {
                        throw new MWException("SQL encoding is invalid");
                }
 
+               //handle some oracle specifics
+               //remove AS column/table/subquery namings
+               $sql = preg_replace('/ as /i', ' ', $sql);
+               // Oracle has issues with UNION clause if the statement includes LOB fields
+               // So we do a UNION ALL and then filter the results array with array_unique
+               $union_unique = (preg_match('/\/\* UNION_UNIQUE \*\/ /', $sql) != 0);
+               //EXPLAIN syntax in Oracle is EXPLAIN PLAN FOR and it return nothing
+               //you have to select data from plan table after explain
+               $explain_id = date('dmYHis');
+               $sql = preg_replace('/^EXPLAIN /', 'EXPLAIN PLAN SET STATEMENT_ID = \''.$explain_id.'\' FOR', $sql, 1, $explain_count);
+                       
+               
                if (($this->mLastResult = $stmt = oci_parse($this->mConn, $sql)) === false) {
                        $e = oci_error($this->mConn);
                        $this->reportQueryError($e['message'], $e['code'], $sql, __FUNCTION__);
                }
 
+               $olderr = error_reporting(E_ERROR);
                if (oci_execute($stmt, $this->execFlags()) == false) {
                        $e = oci_error($stmt);
-                       $this->reportQueryError($e['message'], $e['code'], $sql, __FUNCTION__);
+                       if (!$this->ignore_DUP_VAL_ON_INDEX || $e['code'] != '1')
+                               $this->reportQueryError($e['message'], $e['code'], $sql, __FUNCTION__);
                }
-               if (oci_statement_type($stmt) == "SELECT")
-                       return new ORAResult($this, $stmt);
-               else {
+               error_reporting($olderr);
+
+               if ($explain_count > 0) {
+                       return $this->doQuery('SELECT id, cardinality "ROWS" FROM plan_table WHERE statement_id = \''.$explain_id.'\'');
+               } elseif (oci_statement_type($stmt) == "SELECT") {
+                       return new ORAResult($this, $stmt, $union_unique);
+               } else {
                        $this->mAffectedRows = oci_num_rows($stmt);
                        return true;
                }
@@ -226,27 +306,47 @@ class DatabaseOracle extends Database {
        }
 
        function freeResult($res) {
-               $res->free();
+               if ( $res instanceof ORAResult ) {
+                       $res->free();
+               } else {
+                       $res->result->free();
+               }
        }
 
        function fetchObject($res) {
-               return $res->fetchObject();
+               if ( $res instanceof ORAResult ) {
+                       return $res->numRows();
+               } else {
+                       return $res->result->fetchObject();
+               }
        }
 
        function fetchRow($res) {
-               return $res->fetchAssoc();
+               if ( $res instanceof ORAResult ) {
+                       return $res->fetchRow();
+               } else {
+                       return $res->result->fetchRow();
+               }
        }
 
        function numRows($res) {
-               return $res->numRows();
+               if ( $res instanceof ORAResult ) {
+                       return $res->numRows();
+               } else {
+                       return $res->result->numRows();
+               }
        }
 
        function numFields($res) {
-               return $res->numFields();
+               if ( $res instanceof ORAResult ) {
+                       return $res->numFields();
+               } else {
+                       return $res->result->numFields();
+               }
        }
 
        function fieldName($stmt, $n) {
-               return pg_field_name($stmt, $n);
+               return oci_field_name($stmt, $n);
        }
 
        /**
@@ -257,7 +357,11 @@ class DatabaseOracle extends Database {
        }
 
        function dataSeek($res, $row) {
-               $res->seek($row);
+               if ( $res instanceof ORAResult ) {
+                       $res->seek($row);
+               } else {
+                       $res->result->seek($row);
+               }
        }
 
        function lastError() {
@@ -284,63 +388,56 @@ class DatabaseOracle extends Database {
         * Returns information about an index
         * If errors are explicitly ignored, returns NULL on failure
         */
-       function indexInfo( $table, $index, $fname = 'Database::indexExists' ) {
+       function indexInfo( $table, $index, $fname = 'DatabaseOracle::indexExists' ) {
                return false;
        }
 
-       function indexUnique ($table, $index, $fname = 'Database::indexUnique' ) {
+       function indexUnique ($table, $index, $fname = 'DatabaseOracle::indexUnique' ) {
                return false;
        }
 
-       function insert( $table, $a, $fname = 'Database::insert', $options = array() ) {
+       function insert( $table, $a, $fname = 'DatabaseOracle::insert', $options = array() ) {
+               if ( !count( $a ) )
+                       return true;
+
                if (!is_array($options))
                        $options = array($options);
 
-               #if (in_array('IGNORE', $options))
-               #       $oldIgnore = $this->ignoreErrors(true);
+    if (in_array('IGNORE', $options))
+                       $this->ignore_DUP_VAL_ON_INDEX = true;
 
-               # IGNORE is performed using single-row inserts, ignoring errors in each
-               # FIXME: need some way to distiguish between key collision and other types of error
-               //$oldIgnore = $this->ignoreErrors(true);
                if (!is_array(reset($a))) {
                        $a = array($a);
                }
                foreach ($a as $row) {
                        $this->insertOneRow($table, $row, $fname);
                }
-               //$this->ignoreErrors($oldIgnore);
                $retVal = true;
 
-               //if (in_array('IGNORE', $options))
-               //      $this->ignoreErrors($oldIgnore);
+               if (in_array('IGNORE', $options))
+                       $this->ignore_DUP_VAL_ON_INDEX = false;
 
                return $retVal;
        }
 
        function insertOneRow($table, $row, $fname) {
+               global $wgLang;
+
                // "INSERT INTO tables (a, b, c)"
                $sql = "INSERT INTO " . $this->tableName($table) . " (" . join(',', array_keys($row)) . ')';
                $sql .= " VALUES (";
 
                // for each value, append ":key"
                $first = true;
-               $returning = '';
                foreach ($row as $col => $val) {
-                       if (is_object($val)) {
-                               $what = "EMPTY_BLOB()";
-                               assert($returning === '');
-                               $returning = " RETURNING $col INTO :bval";
-                               $blobcol = $col;
-                       } else
-                               $what = ":$col";
-
                        if ($first)
-                               $sql .= "$what";
+                               $sql .= ':'.$col;
                        else
-                               $sql.= ", $what";
+                               $sql.= ', :'.$col;
+                       
                        $first = false;
                }
-               $sql .= ") $returning";
+               $sql .= ')';
 
                $stmt = oci_parse($this->mConn, $sql);
                foreach ($row as $col => $val) {
@@ -349,39 +446,136 @@ class DatabaseOracle extends Database {
                                        $this->reportQueryError($this->lastErrno(), $this->lastError(), $sql, __METHOD__);
                        }
                }
-
-               if (($bval = oci_new_descriptor($this->mConn, OCI_D_LOB)) === false) {
-                       $e = oci_error($stmt);
-                       throw new DBUnexpectedError($this, "Cannot create LOB descriptor: " . $e['message']);
+               
+               $stmt = oci_parse($this->mConn, $sql);
+               foreach ($row as $col => $val) {
+                       $col_type=$this->fieldInfo($this->tableName($table), $col)->type();
+                       if ($col_type != 'BLOB' && $col_type != 'CLOB') {
+                               if (is_object($val))
+                                       $val = $val->getData();
+                               
+                               if (preg_match('/^timestamp.*/i', $col_type) == 1 && strtolower($val) == 'infinity') 
+                                       $val = '31-12-2030 12:00:00.000000';
+                               
+                               if (oci_bind_by_name($stmt, ":$col", $wgLang->checkTitleEncoding($val)) === false)
+                                       $this->reportQueryError($this->lastErrno(), $this->lastError(), $sql, __METHOD__);
+                       } else {
+                               if (($lob[$col] = oci_new_descriptor($this->mConn, OCI_D_LOB)) === false) {
+                                       $e = oci_error($stmt);
+                                       throw new DBUnexpectedError($this, "Cannot create LOB descriptor: " . $e['message']);
+                               }
+                                       
+                               if (is_object($val)) {
+                                       $lob[$col]->writeTemporary($val->getData());
+                                       oci_bind_by_name($stmt, ":$col", $lob[$col], -1, SQLT_BLOB);
+                               } else {
+                                       $lob[$col]->writeTemporary($val);
+                                       oci_bind_by_name($stmt, ":$col", $lob[$col], -1, OCI_B_CLOB);
+                               }
+                       }
                }
-
-               if (strlen($returning))
-                       oci_bind_by_name($stmt, ":bval", $bval, -1, SQLT_BLOB);
-
+               
+               $olderr = error_reporting(E_ERROR);
                if (oci_execute($stmt, OCI_DEFAULT) === false) {
                        $e = oci_error($stmt);
-                       $this->reportQueryError($e['message'], $e['code'], $sql, __METHOD__);
-               }
-               if (strlen($returning)) {
-                       $bval->save($row[$blobcol]->getData());
-                       $bval->free();
+                       
+                       if (!$this->ignore_DUP_VAL_ON_INDEX || $e['code'] != '1')
+                               $this->reportQueryError($e['message'], $e['code'], $sql, __METHOD__);
+                       else
+                               $this->mAffectedRows = oci_num_rows($stmt);
+               } else 
+                       $this->mAffectedRows = oci_num_rows($stmt);
+               error_reporting($olderr);
+               
+               if (isset($lob)){
+                       foreach ($lob as $lob_i => $lob_v) {
+                               $lob_v->free();
+                       }
                }
+               
                if (!$this->mTrxLevel)
                        oci_commit($this->mConn);
-
+               
                oci_free_statement($stmt);
        }
 
+       function insertSelect( $destTable, $srcTable, $varMap, $conds, $fname = 'DatabaseOracle::insertSelect',
+               $insertOptions = array(), $selectOptions = array() )
+       {
+               $destTable = $this->tableName( $destTable );
+               if( !is_array( $selectOptions ) ) {
+                       $selectOptions = array( $selectOptions );
+               }
+               list( $startOpts, $useIndex, $tailOpts ) = $this->makeSelectOptions( $selectOptions );
+               if( is_array( $srcTable ) ) {
+                       $srcTable =  implode( ',', array_map( array( &$this, 'tableName' ), $srcTable ) );
+               } else {
+                       $srcTable = $this->tableName( $srcTable );
+               }
+               $sql = "INSERT INTO $destTable (" . implode( ',', array_keys( $varMap ) ) . ')' .
+                       " SELECT $startOpts " . implode( ',', $varMap ) .
+                       " FROM $srcTable $useIndex ";
+               if ( $conds != '*' ) {
+                       $sql .= ' WHERE ' . $this->makeList( $conds, LIST_AND );
+               }
+               $sql .= " $tailOpts";
+
+               if (in_array('IGNORE', $insertOptions)) 
+                       $this->ignore_DUP_VAL_ON_INDEX = true;
+
+               $retval = $this->query( $sql, $fname );
+
+               if (in_array('IGNORE', $insertOptions))
+                       $this->ignore_DUP_VAL_ON_INDEX = false;
+               
+               return $retval;
+       }
+
        function tableName( $name ) {
-               # Replace reserved words with better ones
+               global $wgSharedDB, $wgSharedPrefix, $wgSharedTables;
+               /*
+               Replace reserved words with better ones
+               Useing uppercase, because that's the only way oracle can handle 
+               quoted tablenames
+               */
                switch( $name ) {
                        case 'user':
-                               return 'mwuser';
+                               $name = 'MWUSER'; break;
                        case 'text':
-                               return 'pagecontent';
-                       default:
-                               return $name;
+                               $name = 'PAGECONTENT'; break;
                }
+
+               /*
+                       The rest of procedure is equal to generic Databse class
+                       except for the quoting style
+               */
+               if ( $name[0] == '"' && substr( $name, -1, 1 ) == '"' ) return $name;
+
+               if( preg_match( '/(^|\s)(DISTINCT|JOIN|ON|AS)(\s|$)/i', $name ) !== 0 ) return $name;
+               $dbDetails = array_reverse( explode( '.', $name, 2 ) );
+               if( isset( $dbDetails[1] ) ) @list( $table, $database ) = $dbDetails;
+               else                         @list( $table ) = $dbDetails;
+               
+               $prefix = $this->mTablePrefix;
+               
+               if( isset($database) ) $table = ( $table[0] == '`' ? $table : "`{$table}`" );
+               
+               if( !isset( $database ) 
+                && isset( $wgSharedDB )
+                && $table[0] != '"'
+                && isset( $wgSharedTables )
+                && is_array( $wgSharedTables )
+                && in_array( $table, $wgSharedTables ) ) {
+                       $database = $wgSharedDB;
+                       $prefix   = isset( $wgSharedPrefix ) ? $wgSharedPrefix : $prefix;
+               }
+               
+               if( isset($database) ) $database = ( $database[0] == '"' ? $database : "\"{$database}\"" );
+               $table = ( $table[0] == '"' ? $table : "\"{$prefix}{$table}\"" );
+               
+               $tableName = ( isset($database) ? "{$database}.{$table}" : "{$table}" );
+               
+               return strtoupper($tableName);
        }
 
        /**
@@ -395,13 +589,6 @@ class DatabaseOracle extends Database {
                return $this->mInsertId;
        }
 
-       /**
-        * Oracle does not have a "USE INDEX" clause, so return an empty string
-        */
-       function useIndexClause($index) {
-               return '';
-       }
-
        # REPLACE query wrapper
        # Oracle simulates this with a DELETE followed by INSERT
        # $row is the row to insert, an associative array
@@ -411,7 +598,7 @@ class DatabaseOracle extends Database {
        # It may be more efficient to leave off unique indexes which are unlikely to collide.
        # However if you do this, you run the risk of encountering errors which wouldn't have
        # occurred in MySQL
-       function replace( $table, $uniqueIndexes, $rows, $fname = 'Database::replace' ) {
+       function replace( $table, $uniqueIndexes, $rows, $fname = 'DatabaseOracle::replace' ) {
                $table = $this->tableName($table);
 
                if (count($rows)==0) {
@@ -454,16 +641,14 @@ class DatabaseOracle extends Database {
                        }
 
                        # Now insert the row
-                       $sql = "INSERT INTO $table (" . $this->makeList( array_keys( $row ), LIST_NAMES ) .') VALUES (' .
-                               $this->makeList( $row, LIST_COMMA ) . ')';
-                       $this->query($sql, $fname);
+                       $this->insert( $table, $row, $fname );
                }
        }
 
        # DELETE where the condition is a join
-       function deleteJoin( $delTable, $joinTable, $delVar, $joinVar, $conds, $fname = "Database::deleteJoin" ) {
+       function deleteJoin( $delTable, $joinTable, $delVar, $joinVar, $conds, $fname = "DatabaseOracle::deleteJoin" ) {
                if ( !$conds ) {
-                       throw new DBUnexpectedError($this,  'Database::deleteJoin() called with empty $conds' );
+                       throw new DBUnexpectedError($this,  'DatabaseOracle::deleteJoin() called with empty $conds' );
                }
 
                $delTable = $this->tableName( $delTable );
@@ -495,27 +680,16 @@ class DatabaseOracle extends Database {
                return $size;
        }
 
-       function lowPriorityOption() {
-               return '';
-       }
-
        function limitResult($sql, $limit, $offset) {
                if ($offset === false)
                        $offset = 0;
-               return "SELECT * FROM ($sql) WHERE rownum >= (1 + $offset) AND rownum < 1 + $limit + $offset";
+               return "SELECT * FROM ($sql) WHERE rownum >= (1 + $offset) AND rownum < (1 + $limit + $offset)";
        }
 
-       /**
-        * Returns an SQL expression for a simple conditional.
-        * Uses CASE on Oracle
-        *
-        * @param string $cond SQL expression which will result in a boolean value
-        * @param string $trueVal SQL expression to return if true
-        * @param string $falseVal SQL expression to return if false
-        * @return string SQL fragment
-        */
-       function conditional( $cond, $trueVal, $falseVal ) {
-               return " (CASE WHEN $cond THEN $trueVal ELSE $falseVal END) ";
+
+       function unionQueries($sqls, $all = false) {
+               $glue = ' UNION ALL ';
+               return 'SELECT * '.($all?'':'/* UNION_UNIQUE */ ').'FROM ('.implode( $glue, $sqls ).')' ;
        }
 
        function wasDeadlock() {
@@ -540,12 +714,12 @@ class DatabaseOracle extends Database {
                ++$this->mErrorCount;
 
                if ($ignore || $tempIgnore) {
-echo "error ignored! query = [$sql]\n";
+//echo "error ignored! query = [$sql]\n";
                        wfDebug("SQL ERROR (ignored): $error\n");
                        $this->ignoreErrors( $ignore );
                }
                else {
-echo "error!\n";
+//echo "error!\n";
                        $message = "A database error has occurred\n" .
                                "Query: $sql\n" .
                                "Function: $fname\n" .
@@ -572,24 +746,51 @@ echo "error!\n";
         * Query whether a given table exists (in the given schema, or the default mw one if not given)
         */
        function tableExists($table) {
-               $etable= $this->addQuotes($table);
-               $SQL = "SELECT 1 FROM user_tables WHERE table_name='$etable'";
-               $res = $this->query($SQL);
-               $count = $res ? oci_num_rows($res) : 0;
-               if ($res)
-                       $this->freeResult($res);
+               $SQL = "SELECT 1 FROM user_tables WHERE table_name='$table'";
+               $res = $this->doQuery($SQL);
+               if ($res) {
+                       $count = $res->numRows();
+                       $res->free();
+               } else {
+                       $count = 0;
+               }
                return $count;
        }
 
        /**
         * Query whether a given column exists in the mediawiki schema
+        * based on prebuilt table to simulate MySQL field info and keep query speed minimal
         */
        function fieldExists( $table, $field ) {
-               return true; // XXX
+               if (!isset($this->fieldInfo_stmt))
+                       $this->fieldInfo_stmt = oci_parse($this->mConn, 'SELECT * FROM wiki_field_info_full WHERE table_name = upper(:tab) and column_name = UPPER(:col)');
+
+               oci_bind_by_name($this->fieldInfo_stmt, ':tab', trim($table, '"'));
+               oci_bind_by_name($this->fieldInfo_stmt, ':col', $field);
+
+               if (oci_execute($this->fieldInfo_stmt, OCI_DEFAULT) === false) {
+                       $e = oci_error($this->fieldInfo_stmt);
+                       $this->reportQueryError($e['message'], $e['code'], 'fieldInfo QUERY', __METHOD__);
+                       return false;
+               }
+               $res = new ORAResult($this,$this->fieldInfo_stmt);
+               return $res->numRows() != 0;
        }
 
        function fieldInfo( $table, $field ) {
-               return false; // XXX
+               if (!isset($this->fieldInfo_stmt))
+                       $this->fieldInfo_stmt = oci_parse($this->mConn, 'SELECT * FROM wiki_field_info_full WHERE table_name = upper(:tab) and column_name = UPPER(:col)');
+
+               oci_bind_by_name($this->fieldInfo_stmt, ':tab', trim($table, '"'));
+               oci_bind_by_name($this->fieldInfo_stmt, ':col', $field);
+
+               if (oci_execute($this->fieldInfo_stmt, OCI_DEFAULT) === false) {
+                       $e = oci_error($this->fieldInfo_stmt);
+                       $this->reportQueryError($e['message'], $e['code'], 'fieldInfo QUERY', __METHOD__);
+                       return false;
+               }
+               $res = new ORAResult($this,$this->fieldInfo_stmt);
+               return new ORAField($res->fetchRow());
        }
 
        function begin( $fname = '' ) {
@@ -608,6 +809,101 @@ echo "error!\n";
                return $sql;
        }
 
+       /* defines must comply with ^define\s*([^\s=]*)\s*=\s?'\{\$([^\}]*)\}'; */
+       function sourceStream( $fp, $lineCallback = false, $resultCallback = false ) {
+               $cmd = "";
+               $done = false;
+               $dollarquote = false;
+               
+               $replacements = array();
+
+               while ( ! feof( $fp ) ) {
+                       if ( $lineCallback ) {
+                               call_user_func( $lineCallback );
+                       }
+                       $line = trim( fgets( $fp, 1024 ) );
+                       $sl = strlen( $line ) - 1;
+
+                       if ( $sl < 0 ) { continue; }
+                       if ( '-' == $line{0} && '-' == $line{1} ) { continue; }
+
+                       // Allow dollar quoting for function declarations
+                       if (substr($line,0,8) == '/*$mw$*/') {
+                               if ($dollarquote) {
+                                       $dollarquote = false;
+                                       $done = true;
+                               }
+                               else {
+                                       $dollarquote = true;
+                               }
+                       }
+                       else if (!$dollarquote) {
+                               if ( ';' == $line{$sl} && ($sl < 2 || ';' != $line{$sl - 1})) {
+                                       $done = true;
+                                       $line = substr( $line, 0, $sl );
+                               }
+                       }
+
+                       if ( '' != $cmd ) { $cmd .= ' '; }
+                       $cmd .= "$line\n";
+
+                       if ( $done ) {
+                               $cmd = str_replace(';;', ";", $cmd);
+                               if (strtolower(substr($cmd, 0, 6)) == 'define' ) {
+                                       if (preg_match('/^define\s*([^\s=]*)\s*=\s*\'\{\$([^\}]*)\}\'/', $cmd, $defines)) {
+                                               $replacements[$defines[2]] = $defines[1];
+                                       }
+                               } else {
+                                       foreach ( $replacements as $mwVar=>$scVar ) {
+                                               $cmd = str_replace( '&' . $scVar . '.', '{$'.$mwVar.'}', $cmd );
+                                       }
+
+                                       $cmd = $this->replaceVars( $cmd );
+                                       $res = $this->query( $cmd, __METHOD__ );
+                                       if ( $resultCallback ) {
+                                               call_user_func( $resultCallback, $res, $this );
+                                       }
+       
+                                       if ( false === $res ) {
+                                               $err = $this->lastError();
+                                               return "Query \"{$cmd}\" failed with error code \"$err\".\n";
+                                       }
+                               }
+
+                               $cmd = '';
+                               $done = false;
+                       }
+               }
+               return true;
+       }
+
+       function setup_database() {
+               global $wgVersion, $wgDBmwschema, $wgDBts2schema, $wgDBport, $wgDBuser;
+               
+               echo "<li>Creating DB objects</li>\n";
+               $res = dbsource( "../maintenance/ora/tables.sql", $this);
+               
+               // Avoid the non-standard "REPLACE INTO" syntax
+               echo "<li>Populating table interwiki</li>\n";
+               $f = fopen( "../maintenance/interwiki.sql", 'r' );
+               if ($f == false ) {
+                       dieout( "<li>Could not find the interwiki.sql file</li>");
+               }
+               
+               //do it like the postgres :D
+               $SQL = "INSERT INTO interwiki(iw_prefix,iw_url,iw_local) VALUES ";
+               while ( ! feof( $f ) ) {
+                       $line = fgets($f,1024);
+                       $matches = array();
+                       if (!preg_match('/^\s*(\(.+?),(\d)\)/', $line, $matches)) {
+                               continue;
+                       }
+                       $this->query("$SQL $matches[1],$matches[2])");
+               }
+
+               echo "<li>Table interwiki successfully populated</li>\n";
+       }
+
        function strencode($s) {
                return str_replace("'", "''", $s);
        }
@@ -620,8 +916,9 @@ echo "error!\n";
        }
 
        function addQuotes( $s ) {
-       global  $wgLang;
-               $s = $wgLang->checkTitleEncoding($s);
+               global $wgLang;
+               if (isset($wgLang->mLoaded) && $wgLang->mLoaded)
+                       $s = $wgLang->checkTitleEncoding($s);
                return "'" . $this->strencode($s) . "'";
        }
 
@@ -629,9 +926,13 @@ echo "error!\n";
                return $s;
        }
 
-       /* For now, does nothing */
-       function selectDB( $db ) {
-               return true;
+       function selectRow( $table, $vars, $conds, $fname = 'DatabaseOracle::selectRow', $options = array(), $join_conds = array() ) {
+               if (is_array($table)) 
+                       foreach ($table as $tab)
+                               $tab = $this->tableName($tab);
+               else
+                       $table = $this->tableName($table);
+               return parent::selectRow($table, $vars, $conds, $fname, $options, $join_conds);
        }
 
        /**
@@ -640,7 +941,7 @@ echo "error!\n";
         *
         * @private
         *
-        * @param array $options an associative array of options to be turned into
+        * @param $options Array: an associative array of options to be turned into
         *              an SQL query, valid keys are listed in the function.
         * @return array
         */
@@ -658,12 +959,6 @@ echo "error!\n";
                if ( isset( $options['GROUP BY'] ) ) $preLimitTail .= " GROUP BY {$options['GROUP BY']}";
                if ( isset( $options['ORDER BY'] ) ) $preLimitTail .= " ORDER BY {$options['ORDER BY']}";
 
-               if (isset($options['LIMIT'])) {
-               //      $tailOpts .= $this->limitResult('', $options['LIMIT'],
-               //              isset($options['OFFSET']) ? $options['OFFSET']
-               //              : false);
-               }
-
                #if ( isset( $noKeyOptions['FOR UPDATE'] ) ) $tailOpts .= ' FOR UPDATE';
                #if ( isset( $noKeyOptions['LOCK IN SHARE MODE'] ) ) $tailOpts .= ' LOCK IN SHARE MODE';
                if ( isset( $noKeyOptions['DISTINCT'] ) || isset( $noKeyOptions['DISTINCTROW'] ) ) $startOpts .= 'DISTINCT';
@@ -677,13 +972,51 @@ echo "error!\n";
                return array( $startOpts, $useIndex, $preLimitTail, $postLimitTail );
        }
 
-       public function setTimeout( $timeout ) {
-               // @todo fixme no-op
+       /* redundand ... will remove after confirming bitwise operations functionality
+       public function makeList( $a, $mode = LIST_COMMA ) {
+               if ( !is_array( $a ) ) {
+                       throw new DBUnexpectedError( $this, 'DatabaseOracle::makeList called with incorrect parameters' );
+               }
+               $a2 = array();
+               foreach ($a as $key => $value) {
+                       if (strpos($key, ' & ') !== FALSE)
+                               $a2[preg_replace('/(.*)\s&\s(.*)/', 'BITAND($1, $2)', $key)] = $value;
+                       elseif (strpos($key, ' | ') !== FALSE)
+                               $a2[preg_replace('/(.*)\s|\s(.*)/', 'BITOR($1, $2)', $key)] = $value;
+                       elseif (!is_array($value)) {
+                               if (strpos($value, ' = ') !== FALSE) {
+                                       if (strpos($value, ' & ') !== FALSE)
+                                               $a2[$key] = preg_replace('/(.*)\s&\s(.*?)\s=\s(.*)/', 'BITAND($1, $2) = $3', $value);
+                                       elseif (strpos($value, ' | ') !== FALSE)
+                                               $a2[$key] = preg_replace('/(.*)\s|\s(.*?)\s=\s(.*)/', 'BITOR($1, $2) = $3', $value);
+                                       else $a2[$key] = $value;
+                               } 
+                               elseif (strpos($value, ' & ') !== FALSE)
+                                       $a2[$key] = preg_replace('/(.*)\s&\s(.*)/', 'BITAND($1, $2)', $value);
+                               elseif (strpos($value, ' | ') !== FALSE)
+                                       $a2[$key] = preg_replace('/(.*)\s|\s(.*)/', 'BITOR($1, $2)', $value);
+                               else
+                                       $a2[$key] = $value;
+                       }
+                       else
+                               $a2[$key] = $value;
+               }
+
+               return parent::makeList($a2, $mode);
        }
+       */
 
-       function ping() {
-               wfDebug( "Function ping() not written for DatabaseOracle.php yet");
-               return true;
+       function bitNot($field) {
+               //expecting bit-fields smaller than 4bytes
+               return 'BITNOT('.$bitField.')';
+       }
+
+       function bitAnd($fieldLeft, $fieldRight) {
+               return 'BITAND('.$fieldLeft.', '.$fieldRight.')';
+       }
+
+       function bitOr($fieldLeft, $fieldRight) {
+               return 'BITOR('.$fieldLeft.', '.$fieldRight.')';
        }
 
        /**
@@ -696,8 +1029,8 @@ echo "error!\n";
                return 0;
        }
 
-       function setFakeSlaveLag() {}
-       function setFakeMaster() {}
+       function setFakeSlaveLag( $lag ) {}
+       function setFakeMaster( $enabled = true ) {}
 
        function getDBname() {
                return $this->mDBname;
@@ -707,6 +1040,26 @@ echo "error!\n";
                return $this->mServer;
        }
        
+       public function replaceVars( $ins ) {
+               $varnames = array('wgDBprefix');
+               if ($this->mFlags & DBO_SYSDBA) {
+                       $varnames[] = 'wgDBOracleDefTS';
+                       $varnames[] = 'wgDBOracleTempTS';
+               }
+
+               // Ordinary variables
+               foreach ( $varnames as $var ) {
+                       if( isset( $GLOBALS[$var] ) ) {
+                               $val = addslashes( $GLOBALS[$var] ); // FIXME: safety check?
+                               $ins = str_replace( '{$' . $var . '}', $val, $ins );
+                               $ins = str_replace( '/*$' . $var . '*/`', '`' . $val, $ins );
+                               $ins = str_replace( '/*$' . $var . '*/', $val, $ins );
+                       }
+               }
+
+               return parent::replaceVars($ins);
+       }
+
        /** 
         * No-op lock functions
         */
@@ -716,5 +1069,8 @@ echo "error!\n";
        public function unlock( $lockName, $method ) {
                return true;
        }
-
+       
+       public function getSearchEngine() {
+               return "SearchOracle";
+       }
 } // end DatabaseOracle class