Add latest changes from gitlab-org/gitlab@master

1 files changed, 37 insertions, 0 deletions

diff --git a/db/post_migrate/20200311130802_schedule_populate_user_highest_roles_table.rb b/db/post_migrate/20200311130802_schedule_populate_user_highest_roles_table.rb
new file mode 100644
index 00000000000..36f0d42a855
--- /dev/null
+++ b/db/post_migrate/20200311130802_schedule_populate_user_highest_roles_table.rb
@@ -0,0 +1,37 @@
+# frozen_string_literal: true
+
+class SchedulePopulateUserHighestRolesTable < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  BATCH_SIZE = 10_000
+  DELAY = 5.minutes.to_i
+  DOWNTIME = false
+  MIGRATION = 'PopulateUserHighestRolesTable'
+
+  disable_ddl_transaction!
+
+  class User < ActiveRecord::Base
+    include EachBatch
+
+    scope :active, -> {
+      where(state: 'active', user_type: nil, bot_type: nil)
+        .where('ghost IS NOT TRUE')
+    }
+  end
+
+  def up
+    # We currently have ~5_300_000 users with the state active on GitLab.com.
+    # This means it'll schedule ~530 jobs (10k Users each) with a 5 minutes gap,
+    # so this should take ~44 hours for all background migrations to complete.
+    User.active.each_batch(of: BATCH_SIZE) do |batch, index|
+      range = batch.pluck(Arel.sql('MIN(id)'), Arel.sql('MAX(id)')).first
+      delay = index * DELAY
+
+      migrate_in(delay.seconds, MIGRATION, [*range])
+    end
+  end
+
+  def down
+    # nothing
+  end
+end