ALTER TABLE social_account
    ADD COLUMN name text,
    ADD COLUMN tags text[];

UPDATE social_account
SET name = platform_account_key,
    tags = ARRAY[]::text[];

ALTER TABLE social_account
    ALTER COLUMN name SET NOT NULL,
    ALTER COLUMN name SET DEFAULT '未命名账号',
    ALTER COLUMN tags SET NOT NULL,
    ALTER COLUMN tags SET DEFAULT ARRAY[]::text[],
    ADD CONSTRAINT social_account_name_check
        CHECK (name = btrim(name) AND length(name) BETWEEN 1 AND 128),
    ADD CONSTRAINT social_account_tags_check
        CHECK (cardinality(tags) <= 20);