+# frozen_string_literal: true
+
+class TestMigration < Gitlab::Database::Migration[2.1]
+  disable_ddl_transaction!
+
+  def up
+    remove_column :my_table, :my_column
+    remove_column :my_other_table, :my_column
+  end
+
+  def down
+    remove_column :my_table, :my_column
+  end
+
+  def up
+    remove_column 'my_table', 'my_column'
+  end
+
+  def down
+    remove_column 'my_table', 'my_column'
+  end
+
+  def up
+    remove_column "my_table", "my_column", "new_column"
+  end
+
+  def down
+    remove_column "my_table", "my_column", "new_column"
+  end
+
+  def up
+    remove_column TABLE_NAME, MY_COLUMN
+  end
+
+  def down
+    remove_column TABLE_NAME, MY_COLUMN
+  end
+
+  def up
+    remove_column(:my_table, :my_column)
+  end
+
+  def down
+    remove_column(:my_table, :my_column)
+  end
+
+  def up
+    remove_column('my_table', 'my_column')
+  end
+
+  def down
+    remove_column('my_table', 'my_column')
+  end
+
+  def up
+    remove_column("my_table", "my_column")
+  end
+
+  def down
+    remove_column("my_table", "my_column")
+  end
+
+  def up
+    remove_column(TABLE_NAME, MY_COLUMN)
+  end
+
+  def down
+    remove_column(TABLE_NAME, MY_COLUMN)
+  end
+
+  def up
+    remove_column(
+      :my_table,
+      :my_column
+    )
+  end
+
+  def down
+    remove_column(
+      :my_table,
+      :my_column
+    )
+  end
+end