Don't touch NULL values?

[spyro2000]

Hi there,

loving your tool :) Is is possible to only replace values which are actually present? If some value is in fact null it should just stay this way so that the original structure of the data is kept?

Something like

my_table:
   user_comment: ?? Placeholder comment # <-- read as 'if not null, insert "Placeholder comment"'

Thank you in advance, spyro