GEN Can't generate correct time-related SQL

[violin0622]

GORM Playground Link

go-gorm/playground#706

Description

When I use GEN to update the time like this, it generates incorrect SQL.

It seems GEN will only adapt MySQL time function(i.e. DATE_ADD),
even the driver used is sqlite (shoud be datetime(updated_at, '+1 second') )or postgresql (should be updated_at + interval 1 second ).