Add latest changes from gitlab-org/gitlab@master

1 files changed, 24 insertions, 0 deletions

diff --git a/db/migrate/20191206122926_update_index_for_pool_repositories.rb b/db/migrate/20191206122926_update_index_for_pool_repositories.rb
new file mode 100644
index 00000000000..f88e8e94ee1
--- /dev/null
+++ b/db/migrate/20191206122926_update_index_for_pool_repositories.rb
@@ -0,0 +1,24 @@
+# frozen_string_literal: true
+
+class UpdateIndexForPoolRepositories < ActiveRecord::Migration[5.2]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  def up
+    # This index is less restrictive then the one we already have, no need to
+    # update data.
+    add_concurrent_index :pool_repositories, [:source_project_id, :shard_id], unique: true
+    remove_concurrent_index :pool_repositories, :source_project_id
+  end
+
+  def down
+    # Not adding this index as a unique one, since while the new index existed
+    # we could have created multiple pool repositories for a project. In that
+    # case this rollback would fail.
+    add_concurrent_index :pool_repositories, :source_project_id
+    remove_concurrent_index :pool_repositories, [:source_project_id, :shard_id], unique: true
+  end
+end