065.sql
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	-- SWH DB schema upgrade
	-- from_version: 64
	-- to_version: 65
	-- description: Rename entity{_history}.doap to metadata

	insert into dbversion(version, release, description)
	values(65, now(), 'Work In Progress');

	ALTER TABLE entity
	RENAME COLUMN doap to metadata;

	ALTER TABLE entity_history
	RENAME COLUMN doap to metadata;

	ALTER type entity_id
	RENAME ATTRIBUTE doap to metadata;

	CREATE OR REPLACE FUNCTION swh_entity_history_add() RETURNS void
	LANGUAGE plpgsql
	AS $$
	begin
	insert into entity_history (
	uuid, parent, name, type, description, homepage, active, generated, lister_metadata, metadata, validity
	) select * from tmp_entity_history;
	return;
	end
	$$;

	CREATE OR REPLACE FUNCTION swh_update_entity_from_entity_history() RETURNS trigger
	LANGUAGE plpgsql
	AS $$
	begin
	insert into entity (uuid, parent, name, type, description, homepage, active, generated,
	lister_metadata, metadata, last_seen, last_id)
	select uuid, parent, name, type, description, homepage, active, generated,
	lister_metadata, metadata, unnest(validity), id
	from entity_history
	where uuid = NEW.uuid
	order by unnest(validity) desc limit 1
	on conflict (uuid) do update set
	parent = EXCLUDED.parent,
	name = EXCLUDED.name,
	type = EXCLUDED.type,
	description = EXCLUDED.description,
	homepage = EXCLUDED.homepage,
	active = EXCLUDED.active,
	generated = EXCLUDED.generated,
	lister_metadata = EXCLUDED.lister_metadata,
	metadata = EXCLUDED.metadata,
	last_seen = EXCLUDED.last_seen,
	last_id = EXCLUDED.last_id;

	return null;
	end
	$$;

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