Can't use built-in functions on UPDATE

[mikecleach]

Is there no way to use built-in functions of my database in an update?

For example, I need to set a field to the current time. I can't use something like a formatted moment.js date representing right now because the time periods are short enough that any difference between my computer's time and the database server's time creates unstable timings.

What I need is to be able to do

.update().table('tablename').set('last_check', 'NOW()') and not have the resulting SQL built:
UPDATE tablename SET last_check = 'NOW()' WHERE (id = 2)

because the NOW() function does not run; it is evaluated as a string. Is there some way to do this? If not, I think it should be possible somehow.

[mikecleach]

It appears that the option usingValuePlaceholders set to true enables what I was trying to do. I recommend adding an example of this option to the docs.