ALTER TABLE "mailbox"."mail"
    ADD COLUMN "invalidation_contact_flag" varchar(255),
  ADD COLUMN "invalidation_attachments" text,
  ADD COLUMN "repeat" bool DEFAULT false;

COMMENT ON COLUMN "mailbox"."mail"."invalidation_contact_flag" IS '是否取得联系';

COMMENT ON COLUMN "mailbox"."mail"."invalidation_attachments" IS '无效判定佐证材料';

COMMENT ON COLUMN "mailbox"."mail"."repeat" IS '是否重复来信';