1 files changed, 33 insertions, 0 deletions
diff --git a/db/post_migrate/20210811122206_update_external_project_bots.rb b/db/post_migrate/20210811122206_update_external_project_bots.rb
new file mode 100644
index 00000000000..dc2e3d316b0
--- /dev/null
+++ b/db/post_migrate/20210811122206_update_external_project_bots.rb
@@ -0,0 +1,33 @@
+# frozen_string_literal: true
+
+class UpdateExternalProjectBots < ActiveRecord::Migration[6.1]
+  include Gitlab::Database::MigrationHelpers
+
+  class User < ActiveRecord::Base
+    self.table_name = 'users'
+  end
+
+  disable_ddl_transaction!
+
+  TMP_INDEX_NAME = 'tmp_idx_update_external_project_bots'
+
+  def up
+    add_concurrent_index('users', 'id', name: TMP_INDEX_NAME, where: 'external = true')
+
+    ids = ActiveRecord::Base.connection
+                            .execute("SELECT u.id FROM users u JOIN users u2 on u2.id = u.created_by_id WHERE u.user_type = 6 AND u2.external = true")
+                            .map { |result| result['id'] }
+
+    ids.each_slice(10) do |group|
+      UpdateExternalProjectBots::User.where(id: group).update_all(external: true)
+    end
+
+    remove_concurrent_index_by_name('users', TMP_INDEX_NAME)
+  end
+
+  def down
+    remove_concurrent_index_by_name('users', TMP_INDEX_NAME) if index_exists_by_name?('users', TMP_INDEX_NAME)
+
+    # This migration is irreversible
+  end
+end