This would execute the current SQL statement based upon its context within the current statement. For example:

select 1
from dual
where dummy = (select ‘X’
from dual)

If my cursor is in the subquery and I use CTRL+SHIFT+F9 then it would execute

select ‘X’
from dual

This is different from Shift+F9 that executes the current statement based upon blank lines. Much more ambitious!