create table view_forms (
  name text not null,
  projection ,
  variables 
);
comment on table view_forms is '
  Form for creating a new `view`.
';

comment on column view_forms.name is '
  Name of the view.
';
comment on column view_forms.projection is '
  Projected fields of this view.
';
comment on column view_forms.variables is '
  Definition of variables which can be passed to the view. All `scalar_type`s are allowed, except `object`.
';