colouring-montreal/migrations/009.landuse.down.sql
2019-08-09 14:55:01 +01:00

21 lines
1.0 KiB
SQL

-- Remove planning and controls fields
--Landuse is hierachical. Highest level is Order (Residential) then Group (Residential-Dwelling) then Class (Residential-Dwelling-Detached house)
--Fields could be linked when not mixed use Example: If user inputs class field (Detached-House) on front end then trigger on db automatically will populate group and order. If we go this route then a trigger is needed on the db both to run and remove this process.
-- Land use, single or mutiple classes?
ALTER TABLE buildings DROP COLUMN IF EXISTS landuse_mutiple_use;
-- Land use, how many different uses?
ALTER TABLE buildings DROP COLUMN IF EXISTS landuse_number_of_uses;
-- Land use NLUD class, this might be multiple and should match number of uses input
ALTER TABLE buildings DROP COLUMN IF EXISTS landuse_class;
-- Land use NLUD group, can only be one - prepopulated if mixed
ALTER TABLE buildings DROP COLUMN IF EXISTS landuse_group;
-- Land use NLUD order, can only be one - prepopulated if mixed
ALTER TABLE buildings DROP COLUMN IF EXISTS landuse_order;