From the viewpoint of Ecto/EctoFunction there is no difference between these two, so in you case it should work like that:
defqueryfunc slugify(value)
from u un user,
where: slugify(u.administrative) == ^administrative
From the viewpoint of Ecto/EctoFunction there is no difference between these two, so in you case it should work like that:
defqueryfunc slugify(value)
from u un user,
where: slugify(u.administrative) == ^administrative