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# See http://doc.gitlab.com/ce/development/migration_style_guide.html
# for more information on how to write migrations for GitLab.
class OptimizeCiJobArtifacts < ActiveRecord::Migration[4.2]
include Gitlab::Database::MigrationHelpers
# Set this constant to true if this migration requires downtime.
DOWNTIME = false
disable_ddl_transaction!
def up
# job_id is just here to be a covering index for index only scans
# since we'll almost always be joining against ci_builds on job_id
add_concurrent_index(:ci_job_artifacts, [:expire_at, :job_id])
add_concurrent_index(:ci_builds, [:artifacts_expire_at], where: "artifacts_file <> ''")
end
def down
remove_concurrent_index(:ci_job_artifacts, [:expire_at, :job_id])
remove_concurrent_index(:ci_builds, [:artifacts_expire_at], where: "artifacts_file <> ''")
end
end
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