CREATE UNIQUE INDEX IF NOT EXISTS tenant_stripe_customer_id_unique
ON tenant(stripe_customer_id)
WHERE stripe_customer_id <> '';

CREATE TRIGGER IF NOT EXISTS tenant_stripe_customer_id_not_empty_insert
BEFORE INSERT ON tenant
FOR EACH ROW
WHEN trim(NEW.stripe_customer_id) = ''
BEGIN
  SELECT RAISE(ABORT, 'stripe_customer_id cannot be empty');
END;

CREATE TRIGGER IF NOT EXISTS tenant_stripe_customer_id_not_empty_update
BEFORE UPDATE OF stripe_customer_id ON tenant
FOR EACH ROW
WHEN trim(NEW.stripe_customer_id) = ''
BEGIN
  SELECT RAISE(ABORT, 'stripe_customer_id cannot be empty');
END;