下面的潜在解决方案之一不允许这样做.

select * from XYZ_TABLE where WRITETIME(lastupdated_timestamp) > (TOUNIXTIMESTAMP(now())-42,300,000);

select * from XYZ_TABLE where lastupdated_timestamp > (TOUNIXTIMESTAMP(now())-42,000);

该表有列

lastupdated_timestamp (with an index on this field)
lastupdated_userid (with an index on this field)

任何指针……