create table views (
  guid uuid not null,
  name text not null,
  projection ,
  variables 
);
comment on table views is '
  A stored view containing data from one or more topics.
';

comment on column views.guid is '
  Globally unique identifier of the projection.
';
comment on column views.name is '
  Name of this projection used to reference it in a human-friendly way. The name must be unique.
';
comment on column views.projection is '
  Projected fields of this view.
';
comment on column views.variables is '
  Definition of variables which can be passed to the view. All `scalar_type`s are allowed, except `object`.
';