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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 AddIndexForRecentPushEvents < ActiveRecord::Migration[4.2]
include Gitlab::Database::MigrationHelpers
DOWNTIME = false
disable_ddl_transaction!
def up
add_concurrent_index_if_not_present(
:merge_requests,
[:source_project_id, :source_branch]
)
remove_concurrent_index_if_present(:merge_requests, :source_project_id)
end
def down
add_concurrent_index_if_not_present(:merge_requests, :source_project_id)
remove_concurrent_index_if_present(
:merge_requests,
[:source_project_id, :source_branch]
)
end
def add_concurrent_index_if_not_present(table, columns)
return if index_exists?(table, columns)
add_concurrent_index(table, columns)
end
def remove_concurrent_index_if_present(table, columns)
return unless index_exists?(table, columns)
remove_concurrent_index(table, columns)
end
end
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