Postgresql Update with 'Returning clause'

[Gary Malouf]

I'm trying to execute the following against an h2database in postgresql compatibility mode:

UPDATE ctable c
SET c.status = 1
FROM  (
   SELECT co.id
   FROM ctable co
   INNER JOIN htable a
     ON a.id = secretId
     AND a.coupon_group_id = co.coupon_group_id
     AND a.status = 1
   WHERE co.status = 0
   LIMIT 1
   FOR UPDATE
   ) ic
WHERE  c.id = ic.id
RETURNING c.code

Against Postgres, this performs an update and returns a field from the row that was updated.  When I try to execute this against an h2database, I am getting a mysterious syntax error [42000-187].

This syntax is inspired by http://dba.stackexchange.com/questions/69471/postgres-update-limit-1

[Noel Grandin]

Sorry, we don't support that syntax.

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