ALTER TABLE "mailbox"."mail_mark"
    ADD COLUMN "revisit" bool;

COMMENT ON COLUMN "mailbox"."mail_mark"."revisit" IS '初访、重访';

update mail_mark mm set mm.revisit = m.revisit from mail_source m where mm.mail_id = m.id;

ALTER TABLE "mailbox"."mail"
    ADD COLUMN "police_type" varchar(255);

COMMENT ON COLUMN "mailbox"."mail"."police_type" IS '警种';