diff options
Diffstat (limited to 'db')
-rw-r--r-- | db/post_migrate/20171114104051_remove_empty_fork_networks.rb | 36 | ||||
-rw-r--r-- | db/schema.rb | 2 |
2 files changed, 37 insertions, 1 deletions
diff --git a/db/post_migrate/20171114104051_remove_empty_fork_networks.rb b/db/post_migrate/20171114104051_remove_empty_fork_networks.rb new file mode 100644 index 00000000000..2fe99a1b9c1 --- /dev/null +++ b/db/post_migrate/20171114104051_remove_empty_fork_networks.rb @@ -0,0 +1,36 @@ +class RemoveEmptyForkNetworks < ActiveRecord::Migration + include Gitlab::Database::MigrationHelpers + + DOWNTIME = false + BATCH_SIZE = 10_000 + + class MigrationForkNetwork < ActiveRecord::Base + include EachBatch + + self.table_name = 'fork_networks' + end + + class MigrationForkNetworkMembers < ActiveRecord::Base + self.table_name = 'fork_network_members' + end + + disable_ddl_transaction! + + def up + say 'Deleting empty ForkNetworks in batches' + + has_members = MigrationForkNetworkMembers + .where('fork_network_members.fork_network_id = fork_networks.id') + .select(1) + MigrationForkNetwork.where('NOT EXISTS (?)', has_members) + .each_batch(of: BATCH_SIZE) do |networks| + deleted = networks.delete_all + + say "Deleted #{deleted} rows in batch" + end + end + + def down + # nothing + end +end diff --git a/db/schema.rb b/db/schema.rb index 37e08d453c8..53299792a39 100644 --- a/db/schema.rb +++ b/db/schema.rb @@ -11,7 +11,7 @@ # # It's strongly recommended that you check this file into your version control system. -ActiveRecord::Schema.define(version: 20171106180641) do +ActiveRecord::Schema.define(version: 20171114104051) do # These are extensions that must be enabled in order to support this database enable_extension "plpgsql" |