關於「Postgres UUID unique constraint」標籤，搜尋引擎有相關的訊息討論：

Postgres UUID with indexes and constraints - Stack Overflowstackoverflow.com › questions › postgres-uuid-with-index...Unique index or unique constraint for external UUID column in ...dba.stackexchange.com › questions › unique-index-or-uni...Is it worth putting UNIQUE index on a