text: create table region_boundary (
      rgn18cd character (9),
      rgn18nm character varying(200),
      st_areasha numeric,
      st_lengths numeric
  );
  
  select AddGeometryColumn ('public', 'region_boundary', 'geom', 27700, 'MULTIPOLYGON', 2);
  select AddGeometryColumn ('public', 'region_boundary', 'bbox', 3857, 'POLYGON', 2);
  
  create unique index idx_regionboundary_rgn18cd on region_boundary (rgn18cd);
  cluster region_boundary using idx_regionboundary_rgn18cd;
  create index idx_regionboundary_geom on region_boundary using gist (geom);
  create index idx_regionboundary_bbox on region_boundary using gist (bbox);