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class MergeRequestDiffAddIndex < ActiveRecord::Migration
include Gitlab::Database::MigrationHelpers
disable_ddl_transaction!
# Set this constant to true if this migration requires downtime.
DOWNTIME = false
def up
add_concurrent_index :merge_request_diffs, :merge_request_id
end
def down
if index_exists?(:merge_request_diffs, :merge_request_id)
remove_index :merge_request_diffs, :merge_request_id
end
end
end
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