1 files changed, 30 insertions, 0 deletions
diff --git a/db/post_migrate/20200821224343_schedule_populate_vulnerability_historical_statistics.rb b/db/post_migrate/20200821224343_schedule_populate_vulnerability_historical_statistics.rb
new file mode 100644
index 00000000000..f3a57ab78ef
--- /dev/null
+++ b/db/post_migrate/20200821224343_schedule_populate_vulnerability_historical_statistics.rb
@@ -0,0 +1,30 @@
+# frozen_string_literal: true
+
+class SchedulePopulateVulnerabilityHistoricalStatistics < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+  DELAY_INTERVAL = 2.minutes.to_i
+  BATCH_SIZE = 50
+  MIGRATION = 'PopulateVulnerabilityHistoricalStatistics'
+
+  disable_ddl_transaction!
+
+  class Vulnerability < ActiveRecord::Base
+    self.table_name = 'vulnerabilities'
+
+    include ::EachBatch
+  end
+
+  def up
+    return unless Gitlab.ee?
+
+    Vulnerability.select('project_id').distinct.each_batch(of: BATCH_SIZE, column: 'project_id') do |project_batch, index|
+      migrate_in(index * DELAY_INTERVAL, MIGRATION, [project_batch.pluck(:project_id)])
+    end
+  end
+
+  def down
+    # no-op
+  end
+end