colouring-montreal/migrations/025.state_to_government.up.sql

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-- new enum value
ALTER TYPE public_ownership_type ADD VALUE IF NOT EXISTS 'Government-owned' BEFORE 'Charity-owned';
-- convert existing values
UPDATE buildings
SET community_public_ownership = 'Government-owned'
WHERE community_public_ownership = 'State-owned';
CREATE TYPE public_ownership_type_new
AS ENUM (
'Government-owned',
'Charity-owned',
'Community-owned/cooperative',
'Owned by other non-profit body',
'Not in public/community ownership'
);
-- Convert to the new type, casting via text representation
ALTER TABLE buildings
ALTER COLUMN community_public_ownership TYPE public_ownership_type_new
USING (community_public_ownership::text::public_ownership_type_new);
-- And swap the types
DROP TYPE public_ownership_type;
ALTER TYPE public_ownership_type_new RENAME TO public_ownership_type;