ALTER TABLE buildings ADD COLUMN IF NOT EXISTS location_address_source text;
ALTER TABLE buildings ADD COLUMN IF NOT EXISTS location_address_links text[];
ALTER TABLE buildings ADD COLUMN IF NOT EXISTS location_coordinates_source text;
ALTER TABLE buildings ADD COLUMN IF NOT EXISTS location_coordinates_links text[];
ALTER TABLE buildings ADD COLUMN IF NOT EXISTS is_domestic_source text;
ALTER TABLE buildings ADD COLUMN IF NOT EXISTS is_domestic_links text[];
ALTER TABLE buildings ADD COLUMN IF NOT EXISTS size_storeys_source_type text;
ALTER TABLE buildings ADD COLUMN IF NOT EXISTS size_storeys_source_links text[];
ALTER TABLE buildings ADD COLUMN IF NOT EXISTS size_height_apex_source_type text;
ALTER TABLE buildings ADD COLUMN IF NOT EXISTS size_height_apex_source_links text[];
ALTER TABLE buildings ADD COLUMN IF NOT EXISTS size_height_eaves_source_type text;
ALTER TABLE buildings ADD COLUMN IF NOT EXISTS size_height_eaves_source_links text[];
ALTER TABLE buildings ADD COLUMN IF NOT EXISTS size_height_eaves text;
ALTER TABLE buildings ADD COLUMN IF NOT EXISTS size_floor_area_source_type text;
ALTER TABLE buildings ADD COLUMN IF NOT EXISTS size_floor_area_source_links text[];
ALTER TABLE buildings ADD COLUMN IF NOT EXISTS size_width_frontage_source_type text;
ALTER TABLE buildings ADD COLUMN IF NOT EXISTS size_width_frontage_source_links text[];
ALTER TABLE buildings ADD COLUMN IF NOT EXISTS survival_source_links text[];
ALTER TABLE buildings ADD COLUMN IF NOT EXISTS landowner_source_type text;
ALTER TABLE buildings ADD COLUMN IF NOT EXISTS designers_source_type text;
ALTER TABLE buildings ADD COLUMN IF NOT EXISTS builder_source_type text;
ALTER TABLE buildings ADD COLUMN IF NOT EXISTS extension_source_type text;
ALTER TABLE buildings ADD COLUMN IF NOT EXISTS extension_source_links text[];