diff options
Diffstat (limited to 'db/post_migrate/20170830150306_drop_events_for_migration_table.rb')
-rw-r--r-- | db/post_migrate/20170830150306_drop_events_for_migration_table.rb | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/db/post_migrate/20170830150306_drop_events_for_migration_table.rb b/db/post_migrate/20170830150306_drop_events_for_migration_table.rb new file mode 100644 index 00000000000..763ee9a810d --- /dev/null +++ b/db/post_migrate/20170830150306_drop_events_for_migration_table.rb @@ -0,0 +1,48 @@ +# See http://doc.gitlab.com/ce/development/migration_style_guide.html +# for more information on how to write migrations for GitLab. + +class DropEventsForMigrationTable < ActiveRecord::Migration + include Gitlab::Database::MigrationHelpers + + DOWNTIME = false + + disable_ddl_transaction! + + class Event < ActiveRecord::Base + include EachBatch + end + + def up + transaction do + drop_table :events_for_migration + end + end + + # rubocop: disable Migration/Datetime + def down + create_table :events_for_migration do |t| + t.string :target_type, index: true + t.integer :target_id, index: true + t.string :title + t.text :data + t.integer :project_id + t.datetime :created_at, index: true + t.datetime :updated_at + t.integer :action, index: true + t.integer :author_id, index: true + + t.index [:project_id, :id] + end + + Event.all.each_batch do |relation| + start_id, stop_id = relation.pluck('MIN(id), MAX(id)').first + + execute <<-EOF.strip_heredoc + INSERT INTO events_for_migration (target_type, target_id, project_id, created_at, updated_at, action, author_id) + SELECT target_type, target_id, project_id, created_at, updated_at, action, author_id + FROM events + WHERE id BETWEEN #{start_id} AND #{stop_id} + EOF + end + end +end |