create table query_forms (
  view text,
  projection ,
  variables ,
  sort 
);
comment on table query_forms is '
  Form for querying and projecting data.
';

comment on column query_forms.view is '
  The name of a defined `view` used for projecting. If the view defines variables, they must be provided as well. Either `view` or `projection` must be set.
';
comment on column query_forms.projection is '
  Projected fields to return. Either `view` or `projection` must be set.
';
comment on column query_forms.variables is '
  Variables to pass to the projection or the view.
';
comment on column query_forms.sort is '
  The defined properties refer to the fields of the projection.
';