从 PostgreSQL 表中 POP 一行

Question

什么相当于PostgresSQL 中的 Redis LPOP命令？

例如，在下表中，以包含两行 a 和 bthings的单列命名thing：

thing
----
a
b

What's a correct command to atomically remove and return a row in the table? Using the above example, I'd expect it to return a single row ('a') and delete it as part of a transaction/lock.

Answer 1

您可以使用数据修改公用表表达式来做到这一点：

with deleted as (
  delete from things
  where thing = 'a'
  returning *
)
select *
from deleted;