1 files changed, 23 insertions, 0 deletions
diff --git a/db/post_migrate/20200506125731_cleanup_user_highest_roles_population.rb b/db/post_migrate/20200506125731_cleanup_user_highest_roles_population.rb
new file mode 100644
index 00000000000..5e613228c56
--- /dev/null
+++ b/db/post_migrate/20200506125731_cleanup_user_highest_roles_population.rb
@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+
+class CleanupUserHighestRolesPopulation < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+  INDEX_NAME = 'index_for_migrating_user_highest_roles_table'
+
+  disable_ddl_transaction!
+
+  def up
+    Gitlab::BackgroundMigration.steal('PopulateUserHighestRolesTable')
+
+    remove_concurrent_index(:users, :id, name: INDEX_NAME)
+  end
+
+  def down
+    add_concurrent_index(:users,
+                         :id,
+                         where: "state = 'active' AND user_type IS NULL AND bot_type IS NULL AND ghost IS NOT TRUE",
+                         name: INDEX_NAME)
+  end
+end