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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 MergeRequestsTargetIdIidStatePartialIndex < ActiveRecord::Migration[4.2]
include Gitlab::Database::MigrationHelpers
# Set this constant to true if this migration requires downtime.
DOWNTIME = false
INDEX_NAME = 'index_merge_requests_on_target_project_id_and_iid_opened'
disable_ddl_transaction!
def up
# On GitLab.com this index will take up roughly 5 MB of space.
add_concurrent_index(
:merge_requests,
[:target_project_id, :iid],
where: "state = 'opened'",
name: INDEX_NAME
)
end
def down
remove_concurrent_index_by_name(:merge_requests, INDEX_NAME)
end
end
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