alter table project_correlation
    add "maintenanceETime" timestamp with time zone;

comment on column project_correlation."maintenanceETime" is '维保结束时间'

alter table project_correlation
    add "maintenanceSTime" timestamp with time zone;

comment on column project_correlation."maintenanceSTime" is '维保开始时间';


alter table project_correlation
    rename column "maintenanceETime" to maintenance_end;

alter table project_correlation
    rename column "maintenanceSTime" to maintenance_start;