Add tmp index to ci_builds to optimize stages migration
What does this MR do?
This merge request improves performance of db/migrate/20180420010616_cleanup_build_stage_migration.rb
by introducing temporary partial index.
Does this MR meet the acceptance criteria?
-
Has been reviewed by Backend -
Has been reviewed by Database
What are the relevant issue numbers?
Closes gitlab-org/gitlab-ce#46179
Edited by Grzegorz Bizon