1 files changed, 17 insertions, 0 deletions
diff --git a/db/migrate/20201203171631_add_index_to_domain.rb b/db/migrate/20201203171631_add_index_to_domain.rb
new file mode 100644
index 00000000000..dc7b9539e95
--- /dev/null
+++ b/db/migrate/20201203171631_add_index_to_domain.rb
@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+class AddIndexToDomain < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+  DOWNTIME = false
+  INDEX_NAME = 'index_alert_management_alerts_on_domain'
+
+  disable_ddl_transaction!
+
+  def up
+    add_concurrent_index :alert_management_alerts, :domain, name: INDEX_NAME
+  end
+
+  def down
+    remove_concurrent_index :alert_management_alerts, :domain, name: INDEX_NAME
+  end
+end