create table if not exists roles ( id serial primary key, name varchar(64) not null ); create unique index ix_roles_name on roles(name); create table if not exists rolememberships ( role_id integer not null references roles(id), canvasser_id integer not null references canvassers(id) ); create table if not exists teams ( id serial primary key, name varchar(64) not null, district_id integer not null references districts(id), latitude real, longitude real ); create unique index ix_teams_name on teams(name); create table if not exists teammemberships ( team_id integer not null references teams(id), canvasser_id integer not null references canvassers(id) ); create table if not exists teamorganiserships ( team_id integer not null references teams(id), canvasser_id integer not null references canvassers(id) ); alter table roles owner to youyesyet; alter table rolememberships owner to youyesyet; alter table teams owner to youyesyet; alter table teammemberships owner to youyesyet;