Order demand, pattern and curve

script/sql/create/11.patterns.sql

@@ -2,6 +2,7 @@
 
 create table patterns
 (
-  id varchar(32) references _pattern(id) not null
+  _order serial primary key
+, id varchar(32) references _pattern(id) not null
 , factor numeric not null
 );

script/sql/create/12.curves.sql

@@ -2,7 +2,8 @@
 
 create table curves
 (
-  id varchar(32) references _curve(id) not null
+  _order serial primary key
+, id varchar(32) references _curve(id) not null
 , x numeric not null
 , y numeric not null
 );

script/sql/create/9.demands.sql

@@ -2,7 +2,8 @@
 
 create table demands
 (
-  junction varchar(32) references junctions(id) not null
+  _order serial primary key
+, junction varchar(32) references junctions(id) not null
 , demand numeric not null
 , pattern varchar(32) references _pattern(id)
 , category text