Koha-clms/installer/data/mysql/atomicupdate/Bug10459_AddTimestampToBorrowers.sql

ALTER TABLE borrowers
    ADD COLUMN timestamp timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP
    ON UPDATE CURRENT_TIMESTAMP
    AFTER privacy;
ALTER TABLE deletedborrowers
    ADD COLUMN timestamp timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP
    ON UPDATE CURRENT_TIMESTAMP
    AFTER privacy;