1 files changed, 35 insertions, 0 deletions
diff --git a/db/migrate/20201208210209_create_incident_management_oncall_shifts.rb b/db/migrate/20201208210209_create_incident_management_oncall_shifts.rb
new file mode 100644
index 00000000000..49cb32ffee0
--- /dev/null
+++ b/db/migrate/20201208210209_create_incident_management_oncall_shifts.rb
@@ -0,0 +1,35 @@
+# frozen_string_literal: true
+
+class CreateIncidentManagementOncallShifts < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  def up
+    unless table_exists?(:incident_management_oncall_shifts)
+      with_lock_retries do
+        create_table :incident_management_oncall_shifts do |t|
+          t.references :rotation, null: false, foreign_key: { to_table: :incident_management_oncall_rotations, on_delete: :cascade }
+          t.references :participant, null: false, foreign_key: { to_table: :incident_management_oncall_participants, on_delete: :cascade }
+          t.datetime_with_timezone :starts_at, null: false
+          t.datetime_with_timezone :ends_at, null: false
+        end
+
+        execute <<~SQL
+          ALTER TABLE incident_management_oncall_shifts
+            ADD CONSTRAINT inc_mgmnt_no_overlapping_oncall_shifts
+            EXCLUDE USING gist
+            ( rotation_id WITH =,
+              tstzrange(starts_at, ends_at, '[)') WITH &&
+            )
+        SQL
+      end
+    end
+  end
+
+  def down
+    with_lock_retries do
+      drop_table :incident_management_oncall_shifts
+    end
+  end
+end