alter table accrual change time_stamp time_stamp timestamp null default null;
alter table cron change last_run_date last_run_date timestamp null default null;
alter table pay_period change start_date start_date timestamp null default null;
alter table pay_period change end_date end_date timestamp null default null;
alter table pay_period change transaction_date transaction_date timestamp null default null;
alter table pay_period change advance_end_date advance_end_date timestamp null default null;
alter table pay_period change advance_transaction_date advance_transaction_date timestamp null default null;
alter table pay_period_schedule change anchor_date anchor_date timestamp null default null;
alter table pay_period_schedule change primary_date primary_date timestamp null default null;
alter table pay_period_schedule change primary_transaction_date primary_transaction_date timestamp null default null;
alter table pay_period_schedule change secondary_date secondary_date timestamp null default null;
alter table pay_period_schedule change secondary_transaction_date secondary_transaction_date timestamp null default null;
alter table pay_stub change start_date start_date timestamp null default null;
alter table pay_stub change end_date end_date timestamp null default null;
alter table pay_stub change transaction_date transaction_date timestamp null default null;
alter table premium_policy change start_date start_date timestamp null default null;
alter table premium_policy change end_date end_date timestamp null default null;
alter table punch change time_stamp time_stamp timestamp null default null;
alter table punch change original_time_stamp original_time_stamp timestamp null default null;
alter table punch change actual_time_stamp actual_time_stamp timestamp null default null;
alter table recurring_schedule_template change start_time start_time timestamp null default null;
alter table recurring_schedule_template change end_time end_time timestamp null default null;
alter table schedule change start_time start_time timestamp null default null;
alter table schedule change end_time end_time timestamp null default null;
alter table user_date_total change start_time_stamp start_time_stamp timestamp null default null;
alter table user_date_total change end_time_stamp end_time_stamp timestamp null default null;
alter table station change last_punch_time_stamp last_punch_time_stamp timestamp null default null;
alter table station change pull_start_time pull_start_time timestamp null default null;
alter table station change pull_end_time pull_end_time timestamp null default null;
alter table station change push_start_time push_start_time timestamp null default null;
alter table station change push_end_time push_end_time timestamp null default null;
alter table station change partial_push_start_time partial_push_start_time timestamp null default null;
alter table station change partial_push_end_time partial_push_end_time timestamp null default null;
