1 files changed, 17 insertions, 0 deletions
diff --git a/db/migrate/20210722074339_add_xor_check_constraint_for_escalation_rules.rb b/db/migrate/20210722074339_add_xor_check_constraint_for_escalation_rules.rb
new file mode 100644
index 00000000000..bd140e1da56
--- /dev/null
+++ b/db/migrate/20210722074339_add_xor_check_constraint_for_escalation_rules.rb
@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+class AddXorCheckConstraintForEscalationRules < ActiveRecord::Migration[6.1]
+  include Gitlab::Database::MigrationHelpers
+
+  disable_ddl_transaction!
+
+  CONSTRAINT_NAME = 'escalation_rules_one_of_oncall_schedule_or_user'
+
+  def up
+    add_check_constraint :incident_management_escalation_rules, 'num_nonnulls(oncall_schedule_id, user_id) = 1', CONSTRAINT_NAME
+  end
+
+  def down
+    remove_check_constraint :incident_management_escalation_rules, CONSTRAINT_NAME
+  end
+end