Added autoincrement support

lib/Doctrine/DBAL/Platforms/DrizzlePlatform.php

@@ -147,7 +147,7 @@ class DrizzlePlatform extends AbstractPlatform
             $database = 'DATABASE()';
         }
 
-        return "SELECT COLUMN_NAME, COLUMN_TYPE, COLUMN_COMMENT, IS_NULLABLE" .
+        return "SELECT COLUMN_NAME, COLUMN_TYPE, COLUMN_COMMENT, IS_NULLABLE, IS_AUTO_INCREMENT" .
                " FROM DATA_DICTIONARY.COLUMNS" .
                " WHERE TABLE_SCHEMA=" . $database . " AND TABLE_NAME = '" . $table . "'";
     }
@@ -162,4 +162,13 @@ class DrizzlePlatform extends AbstractPlatform
         return "SELECT * FROM DATA_DICTIONARY.INDEXES WHERE FALSE";
     }
 
+    public function prefersIdentityColumns()
+    {
+        return true;
+    }
+
+    public function supportsIdentityColumns()
+    {
+        return true;
+    }
 }

lib/Doctrine/DBAL/Schema/DrizzleSchemaManager.php

@@ -33,7 +33,9 @@ class DrizzleSchemaManager extends AbstractSchemaManager
         $type = $this->_platform->getDoctrineTypeMapping($dbType);
         $type = $this->extractDoctrineTypeFromComment($tableColumn['COLUMN_COMMENT'], $type);
 
-        $options = array();
+        $options = array(
+            'autoincrement' => (boolean)$tableColumn['IS_AUTO_INCREMENT'],
+        );
 
         return new Column($tableName, \Doctrine\DBAL\Types\Type::getType($type), $options);
     }