Start region work

script/sql/create/24.coordinates.sql

@@ -3,10 +3,9 @@
 create table coordinates
 (
   node varchar(32) primary key references _node(id)
-, coord point not null
+, coord geometry
 );
 
 -- delete when delete node
 
-create index coordinates_spgist on coordinates using spgist(coord);
 create index coordinates_gist on coordinates using gist(coord);

script/sql/create/32.virtual_district.sql

@@ -0,0 +1,9 @@
+create table virtual_district
+(
+  id text primary key
+, center varchar(32) references _node(id) not null unique
+, boundary geometry unique
+, nodes varchar(32)[]
+);
+
+create index virtual_district_gist on virtual_district using gist(boundary);

script/sql/drop/24.coordinates.sql

@@ -2,6 +2,4 @@
 
 drop index if exists coordinates_gist;
 
-drop index if exists coordinates_spgist;
-
 drop table if exists coordinates;

script/sql/drop/32.virtual_district.sql

@@ -0,0 +1,3 @@
+drop index if exists virtual_district_gist;
+
+drop table if exists virtual_district;