diff --git a/lib/Doctrine/Configurable.php b/lib/Doctrine/Configurable.php
index 27e15f07b..c74e3fb54 100644
--- a/lib/Doctrine/Configurable.php
+++ b/lib/Doctrine/Configurable.php
@@ -126,6 +126,7 @@ abstract class Doctrine_Configurable
             case Doctrine::ATTR_DEFAULT_TABLE_TYPE:
             case Doctrine::ATTR_ACCESSOR_PREFIX_GET:
             case Doctrine::ATTR_ACCESSOR_PREFIX_SET:
+            case Doctrine::ATTR_EMULATE_DATABASE:
 
                 break;
             case Doctrine::ATTR_SEQCOL_NAME:
diff --git a/lib/Doctrine/Connection.php b/lib/Doctrine/Connection.php
index 3e040a169..9a46620c4 100644
--- a/lib/Doctrine/Connection.php
+++ b/lib/Doctrine/Connection.php
@@ -497,7 +497,8 @@ abstract class Doctrine_Connection extends Doctrine_Configurable implements Coun
      * @param array $params             prepared statement params
      * @return array
      */
-    public function fetchAll($statement, array $params = array()) {
+    public function fetchAll($statement, array $params = array()) 
+    {
         return $this->execute($statement, $params)->fetchAll(PDO::FETCH_ASSOC);
     }
     /**
@@ -508,7 +509,8 @@ abstract class Doctrine_Connection extends Doctrine_Configurable implements Coun
      * @param int $colnum               0-indexed column number to retrieve
      * @return mixed
      */
-    public function fetchOne($statement, array $params = array(), $colnum = 0) {
+    public function fetchOne($statement, array $params = array(), $colnum = 0) 
+    {
         return $this->execute($statement, $params)->fetchColumn($colnum);
     }
     /**
@@ -518,7 +520,8 @@ abstract class Doctrine_Connection extends Doctrine_Configurable implements Coun
      * @param array $params             prepared statement params
      * @return array
      */
-    public function fetchRow($statement, array $params = array()) {
+    public function fetchRow($statement, array $params = array()) 
+    {
         return $this->execute($statement, $params)->fetch(PDO::FETCH_ASSOC);
     }
     /**
@@ -528,7 +531,8 @@ abstract class Doctrine_Connection extends Doctrine_Configurable implements Coun
      * @param array $params             prepared statement params
      * @return array
      */
-    public function fetchArray($statement, array $params = array()) {
+    public function fetchArray($statement, array $params = array()) 
+    {
         return $this->execute($statement, $params)->fetch(PDO::FETCH_NUM);
     }
     /**
@@ -539,7 +543,8 @@ abstract class Doctrine_Connection extends Doctrine_Configurable implements Coun
      * @param int $colnum               0-indexed column number to retrieve
      * @return array
      */
-    public function fetchColumn($statement, array $params = array(), $colnum = 0) {
+    public function fetchColumn($statement, array $params = array(), $colnum = 0) 
+    {
         return $this->execute($statement, $params)->fetchAll(PDO::FETCH_COLUMN, $colnum);
     }
     /**
@@ -549,7 +554,8 @@ abstract class Doctrine_Connection extends Doctrine_Configurable implements Coun
      * @param array $params             prepared statement params
      * @return array
      */
-    public function fetchAssoc($statement, array $params = array()) {
+    public function fetchAssoc($statement, array $params = array()) 
+    {
         return $this->execute($statement, $params)->fetchAll(PDO::FETCH_ASSOC);
     }
     /**
@@ -559,7 +565,8 @@ abstract class Doctrine_Connection extends Doctrine_Configurable implements Coun
      * @param array $params             prepared statement params
      * @return array
      */
-    public function fetchBoth($statement, array $params = array()) {
+    public function fetchBoth($statement, array $params = array()) 
+    {
         return $this->execute($statement, $params)->fetchAll(PDO::FETCH_BOTH);
     }
     /**
@@ -578,7 +585,8 @@ abstract class Doctrine_Connection extends Doctrine_Configurable implements Coun
      * @see Doctrine_Query
      * @return Doctrine_Collection      Collection of Doctrine_Record objects
      */
-    public function query($query, array $params = array()) {
+    public function query($query, array $params = array()) 
+    {
         $parser = new Doctrine_Query($this);
 
         return $parser->query($query, $params);
@@ -602,7 +610,8 @@ abstract class Doctrine_Connection extends Doctrine_Configurable implements Coun
      * @return Doctrine_Record|false    Doctrine_Record object on success,
      *                                  boolean false on failure
      */
-    public function queryOne($query, array $params = array()) {
+    public function queryOne($query, array $params = array()) 
+    {
         $parser = new Doctrine_Query($this);
 
         $coll = $parser->query($query, $params);
@@ -627,6 +636,18 @@ abstract class Doctrine_Connection extends Doctrine_Configurable implements Coun
         }
         return $this->dbh->query($query);
     }
+    /**
+     * standaloneQuery
+     *
+     * @param string $query     sql query
+     * @param array $params     query parameters
+     *
+     * @return PDOStatement|Doctrine_Adapter_Statement
+     */
+    public function standaloneQuery($query, $params = array())
+    {
+        return $this->execute($query, $params);
+    }
     /**
      * execute
      * @param string $query     sql query
@@ -634,7 +655,8 @@ abstract class Doctrine_Connection extends Doctrine_Configurable implements Coun
      *
      * @return PDOStatement|Doctrine_Adapter_Statement
      */
-    public function execute($query, array $params = array()) {
+    public function execute($query, array $params = array()) 
+    {
         try {
             if ( ! empty($params)) {
                 $stmt = $this->dbh->prepare($query);
diff --git a/lib/Doctrine/Import/Oracle.php b/lib/Doctrine/Import/Oracle.php
index 0c25c5d85..506e11e47 100644
--- a/lib/Doctrine/Import/Oracle.php
+++ b/lib/Doctrine/Import/Oracle.php
@@ -37,23 +37,22 @@ class Doctrine_Import_Oracle extends Doctrine_Import
      */
     public function listDatabases()
     {
-        if ( ! $this->conn->options['emulate_database']) {
-            return $this->conn->raiseError(Doctrine::ERROR_UNSUPPORTED, null, null,
-                'database listing is only supported if the "emulate_database" option is enabled', __FUNCTION__);
+        if ( ! $this->conn->getAttribute(Doctrine::ATTR_EMULATE_DATABASE)) {
+            throw new Doctrine_Import_Exception('database listing is only supported if the "emulate_database" option is enabled');
         }
-
+        /**
         if ($this->conn->options['database_name_prefix']) {
             $query = 'SELECT SUBSTR(username, ';
-            $query.= (strlen($this->conn->options['database_name_prefix'])+1);
+            $query.= (strlen($this->conn->getAttribute(['database_name_prefix'])+1);
             $query.= ") FROM sys.dba_users WHERE username LIKE '";
             $query.= $this->conn->options['database_name_prefix']."%'";
         } else {
-            $query = 'SELECT username FROM sys.dba_users';
-        }
-        $result2 = $this->conn->standaloneQuery($query, array('text'), false);
-        $result  = $result2->fetchCol();
+        */
+        $query   = 'SELECT username FROM sys.dba_users';
+
+        $result2 = $this->conn->standaloneQuery($query);
+        $result  = $result2->fetchColumn();
 
-        $result2->free();
         return $result;
     }
     /**
@@ -86,6 +85,7 @@ class Doctrine_Import_Oracle extends Doctrine_Import
     public function listSequences($database = null)
     {
         $query = "SELECT sequence_name FROM sys.user_sequences";
+
         $tableNames = $this->conn->fetchColumn($query);
 
         return array_map(array($this->conn, 'fixSequenceName'), $tableNames);
@@ -98,10 +98,11 @@ class Doctrine_Import_Oracle extends Doctrine_Import
      */
     public function listTableConstraints($table)
     {
-
         $table = $this->conn->quote($table, 'text');
-        $query = 'SELECT index_name name FROM user_constraints';
-        $query.= ' WHERE table_name='.$table.' OR table_name='.strtoupper($table);
+
+        $query = 'SELECT index_name name FROM user_constraints'
+               . ' WHERE table_name = ' . $table . ' OR table_name = ' . strtoupper($table);
+
         $constraints = $this->conn->fetchColumn($query);
 
         return array_map(array($this->conn, 'fixIndexName'), $constraints);
@@ -115,7 +116,9 @@ class Doctrine_Import_Oracle extends Doctrine_Import
     public function listTableColumns($table)
     {
         $table  = strtoupper($table);
-        $sql    = "SELECT column_name, data_type, data_length, nullable, data_default from all_tab_columns WHERE table_name='$table' ORDER BY column_name";
+        $sql    = "SELECT column_name, data_type, data_length, nullable, data_default from all_tab_columns"
+                . " WHERE table_name = '" . $table . "' ORDER BY column_name";
+
         $result = $this->conn->fetchAssoc($sql);
 
         foreach($result as $val) {
@@ -138,9 +141,10 @@ class Doctrine_Import_Oracle extends Doctrine_Import
     public function listTableIndexes($table)
     {
         $table = $this->conn->quote($table, 'text');
-        $query = 'SELECT index_name name FROM user_indexes';
-        $query.= ' WHERE table_name='.$table.' OR table_name='.strtoupper($table);
-        $query.= ' AND generated=' .$this->conn->quote('N', 'text');
+        $query = 'SELECT index_name name FROM user_indexes'
+               . ' WHERE table_name = ' . $table . ' OR table_name = ' . strtoupper($table)
+               . ' AND generated = ' . $this->conn->quote('N', 'text');
+
         $indexes = $this->conn->fetchColumn($query);
 
         return array_map(array($this->conn, 'fixIndexName'), $indexes);
@@ -183,14 +187,18 @@ class Doctrine_Import_Oracle extends Doctrine_Import
      */
     public function listUsers()
     {
+    	/**
         if ($this->conn->options['emulate_database'] && $this->conn->options['database_name_prefix']) {
             $query = 'SELECT SUBSTR(username, ';
             $query.= (strlen($this->conn->options['database_name_prefix'])+1);
             $query.= ") FROM sys.dba_users WHERE username NOT LIKE '";
             $query.= $this->conn->options['database_name_prefix']."%'";
         } else {
-            $query = 'SELECT username FROM sys.dba_users';
-        }
+        */
+
+        $query = 'SELECT username FROM sys.dba_users';
+        //}
+
         return $this->conn->fetchColumn($query);
     }
     /**
diff --git a/tests/DriverTestCase.php b/tests/DriverTestCase.php
index 33e55fb86..c52aa1abb 100644
--- a/tests/DriverTestCase.php
+++ b/tests/DriverTestCase.php
@@ -73,7 +73,7 @@ class AdapterMock implements Doctrine_Adapter_Interface {
         if ($fail) {
             $this->lastInsertIdFail = true;
         } else {
-            $this->lastInsertIdFail = false;   	
+            $this->lastInsertIdFail = false;
         }
     }
     public function lastInsertId()
@@ -125,7 +125,7 @@ class AdapterStatementMock {
         $this->mock->addQuery($this->query);
         return true;
     }
-    public function fetchColumn($colnum) {
+    public function fetchColumn($colnum = 0) {
         return 0;
     }
 }
diff --git a/tests/Import/OracleTestCase.php b/tests/Import/OracleTestCase.php
index c26c9231a..56a35c7e2 100644
--- a/tests/Import/OracleTestCase.php
+++ b/tests/Import/OracleTestCase.php
@@ -30,5 +30,77 @@
  * @since       1.0
  * @version     $Revision$
  */
-class Doctrine_Import_Oracle_TestCase extends Doctrine_UnitTestCase {
+class Doctrine_Import_Oracle_TestCase extends Doctrine_UnitTestCase 
+{
+    public function testListSequencesExecutesSql()
+    {
+        $this->conn->setAttribute(Doctrine::ATTR_EMULATE_DATABASE, true);
+
+        $this->import->listSequences('table');
+        
+        $this->assertEqual($this->adapter->pop(), "SELECT sequence_name FROM sys.user_sequences");
+    }
+    public function testListTableColumnsExecutesSql()
+    {
+        $this->import->listTableColumns('table');
+
+        $q      = "SELECT column_name, data_type, data_length, nullable, data_default from all_tab_columns"
+                . " WHERE table_name = 'TABLE' ORDER BY column_name";
+
+        $this->assertEqual($this->adapter->pop(), $q);
+    }
+    public function testListTableIndexesExecutesSql()
+    {
+        $this->import->listTableIndexes('table');
+
+        $q = 'SELECT index_name name FROM user_indexes'
+           . " WHERE table_name = 'table' OR table_name = 'TABLE'"
+           . " AND generated = 'N'";
+
+        $this->assertEqual($this->adapter->pop(), $q);
+    }
+    public function testListTablesExecutesSql()
+    {
+        $this->import->listTables();
+        
+        $q = 'SELECT table_name FROM sys.user_tables';
+        $this->assertEqual($this->adapter->pop(), $q);
+    }
+    public function testListDatabasesExecutesSql()
+    {
+        $this->import->listDatabases();
+        
+        $q = 'SELECT username FROM sys.dba_users';
+        $this->assertEqual($this->adapter->pop(), $q);
+    }
+    public function testListUsersExecutesSql()
+    {
+        $this->import->listUsers();
+        
+        $q = 'SELECT username FROM sys.dba_users';
+        $this->assertEqual($this->adapter->pop(), $q);
+    }
+    public function testListViewsExecutesSql()
+    {
+        $this->import->listViews();
+        
+        $q = 'SELECT view_name FROM sys.user_views';
+        $this->assertEqual($this->adapter->pop(), $q);
+    }
+    public function testListFunctionsExecutesSql()
+    {
+        $this->import->listFunctions();
+        
+        $q = "SELECT name FROM sys.user_source WHERE line = 1 AND type = 'FUNCTION'";
+        $this->assertEqual($this->adapter->pop(), $q);
+    }
+    public function testListTableConstraintsExecutesSql()
+    {
+        $this->import->listTableConstraints('table');
+        
+        $q = "SELECT index_name name FROM user_constraints"
+           . " WHERE table_name = 'table' OR table_name = 'TABLE'";
+
+        $this->assertEqual($this->adapter->pop(), $q);
+    }
 }
diff --git a/tests/Import/PgsqlTestCase.php b/tests/Import/PgsqlTestCase.php
index 29db771cf..14961a584 100644
--- a/tests/Import/PgsqlTestCase.php
+++ b/tests/Import/PgsqlTestCase.php
@@ -151,7 +151,8 @@ class Doctrine_Import_Pgsql_TestCase extends Doctrine_UnitTestCase
     public function testListTableConstraintsExecutesSql()
     {
         $this->import->listTableConstraints('table');
-        
+
+
         $q = "SELECT
                                                         relname
                                                    FROM
diff --git a/tests/TreeStructureTestCase.php b/tests/TreeStructureTestCase.php
index 70a8414aa..aae066e09 100644
--- a/tests/TreeStructureTestCase.php
+++ b/tests/TreeStructureTestCase.php
@@ -88,5 +88,15 @@ class Doctrine_TreeStructure_TestCase extends Doctrine_UnitTestCase
         $this->assertTrue(count($o4->Children) == 0);
         $this->assertFalse(isset($o4->Parent));
     }
-}
+    public function testTreeStructureFetchingWorksWithDql()
+    {
+        $q = new Doctrine_Query();
+        $q->select('l.*, c.*')
+          ->from('TreeLeaf l, l.Children c')
+          ->where('l.parent_id IS NULL')
+          ->groupby('l.id, c.id');
 
+        $coll = $q->execute();
+
+    }
+}
diff --git a/tests/run.php b/tests/run.php
index 7d6f50619..358f1f76c 100644
--- a/tests/run.php
+++ b/tests/run.php
@@ -60,10 +60,16 @@ $test = new GroupTest('Doctrine Framework Unit Tests');
 
 
 
-
+$test->addTestCase(new Doctrine_Import_Firebird_TestCase());
+$test->addTestCase(new Doctrine_Import_Informix_TestCase());
+$test->addTestCase(new Doctrine_Import_Mysql_TestCase());
+$test->addTestCase(new Doctrine_Import_Mssql_TestCase());
+$test->addTestCase(new Doctrine_Import_Pgsql_TestCase());
+$test->addTestCase(new Doctrine_Import_Oracle_TestCase());
+$test->addTestCase(new Doctrine_Import_Sqlite_TestCase());
 
 // DATABASE ABSTRACTION tests
-
+/**
 // Connection drivers (not yet fully tested)
 $test->addTestCase(new Doctrine_Connection_Pgsql_TestCase());
 $test->addTestCase(new Doctrine_Connection_Oracle_TestCase());
@@ -117,13 +123,7 @@ $test->addTestCase(new Doctrine_Export_Sqlite_TestCase());
 
 // Import module (not yet fully tested)
 //$test->addTestCase(new Doctrine_Import_TestCase());
-$test->addTestCase(new Doctrine_Import_Firebird_TestCase());
-$test->addTestCase(new Doctrine_Import_Informix_TestCase());
-$test->addTestCase(new Doctrine_Import_Mysql_TestCase());
-$test->addTestCase(new Doctrine_Import_Mssql_TestCase());
-$test->addTestCase(new Doctrine_Import_Pgsql_TestCase());
-$test->addTestCase(new Doctrine_Import_Oracle_TestCase());
-$test->addTestCase(new Doctrine_Import_Sqlite_TestCase());
+
 
 // Expression module (not yet fully tested)
 $test->addTestCase(new Doctrine_Expression_TestCase());
@@ -155,7 +155,6 @@ $test->addTestCase(new Doctrine_Relation_Access_TestCase());
 $test->addTestCase(new Doctrine_Relation_ManyToMany_TestCase());
 $test->addTestCase(new Doctrine_Relation_OneToOne_TestCase());
 
-$test->addTestCase(new Doctrine_TreeStructure_TestCase());
 
 
 // Datatypes
@@ -215,6 +214,9 @@ $test->addTestCase(new Doctrine_Query_JoinCondition_TestCase());
 $test->addTestCase(new Doctrine_Query_Join_TestCase());
 
 $test->addTestCase(new Doctrine_ColumnAlias_TestCase());
+*/
+
+$test->addTestCase(new Doctrine_TreeStructure_TestCase());
 // Cache tests
 //$test->addTestCase(new Doctrine_Cache_Query_SqliteTestCase());
 //$test->addTestCase(new Doctrine_Cache_FileTestCase());