Add test for correct index column ordering on clustered indexes

tests/Doctrine/Tests/DBAL/Functional/Schema/SQLServerSchemaManagerTest.php

@@ -164,4 +164,30 @@ class SQLServerSchemaManagerTest extends SchemaManagerFunctionalTestCase
         $this->assertNull($columns['df_current_timestamp']->getDefault());
         $this->assertEquals(666, $columns['df_integer']->getDefault());
     }
+
+    public function testPkOrdering()
+    {
+        // SQL Server stores index column information in a system table with two
+        // columns that almost always have the same value: index_column_id and key_ordinal.
+        // The only situation when the two values doesn't match up is when a clustered index
+        // is declared that references columns in a different order from which they are
+        // declared in the table. In that case, key_ordinal != index_column_id.
+        // key_ordinal holds the index ordering. index_column_id is just a unique identifier
+        // for index columns within the given index.
+        $table = new Table('sqlsrv_pk_ordering');
+        $table->addColumn('colA', 'integer', array('notnull' => true));
+        $table->addColumn('colB', 'integer', array('notnull' => true));
+        $table->setPrimaryKey(['colB', 'colA']);
+        $this->_sm->createTable($table);
+
+        $indexes = $this->_sm->listTableIndexes('sqlsrv_pk_ordering');
+
+        $this->assertCount(1, $indexes);
+
+        $firstIndex = current($indexes);
+        $columns = $firstIndex->getColumns();
+        $this->assertCount(2, $columns);
+        $this->assertEquals('colB', $columns[0]);
+        $this->assertEquals('colA', $columns[1]);
+    }
 }