1 files changed, 27 insertions, 0 deletions
diff --git a/db/migrate/20201202003042_add_epic_board_positions.rb b/db/migrate/20201202003042_add_epic_board_positions.rb
new file mode 100644
index 00000000000..528d5ed3af1
--- /dev/null
+++ b/db/migrate/20201202003042_add_epic_board_positions.rb
@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+class AddEpicBoardPositions < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  def up
+    with_lock_retries do
+      create_table :boards_epic_board_positions do |t|
+        t.references :epic_board, foreign_key: { to_table: :boards_epic_boards, on_delete: :cascade }, null: false, index: false
+        t.references :epic, foreign_key: { on_delete: :cascade }, null: false, index: true
+        t.integer :relative_position
+
+        t.timestamps_with_timezone null: false
+
+        t.index [:epic_board_id, :epic_id], unique: true, name: :index_boards_epic_board_positions_on_epic_board_id_and_epic_id
+      end
+    end
+  end
+
+  def down
+    with_lock_retries do
+      drop_table :boards_epic_board_positions
+    end
+  end
+end