PostgreSQL的查詢本地而不是工作在Heroku（相同的數據）

Question

下面是查詢：

的ActiveRecord :: StatementInvalid（PGError：錯誤：在語法錯誤或接近 「過」 SELECT *，秩（）以上（分區通過thread_i ... ^

 SELECT * 
    FROM (                 
      select *, rank() over (partition by thread_id order by created_at DESC) 
      from posts 
      where circle_id IN (134) OR (receiver_id=3) 
      ) as dt 
    WHERE rank = 1 

編輯：這裏是什麼，我試圖做一個詳細的解釋： Rails 3 app with PostgreSQL - Getting the list of messages grouped by converstation

原來Heroku的共享DB是一個Postgr因此，eSQL版本8.3沒有Windows功能，所以問題變成如何在PostgreSql 8.3中執行此查詢？

謝謝！

Answer 1

嘗試

SELECT p.* 
FROM (                 
     select x.thread_id, max(x.created_at) as maxdt 
     from posts x 
     where x.circle_id IN (134) OR x.receiver_id=3 
     group by x.thread_id 
     ) as dt 
INNER JOIN posts p ON p.thread_id = dt.thread_id and p.created_at = dt.maxdt 
ORDER BY p.created_at DESC 

編輯 - 按評論：德里克和葉海亞

SELECT p.* 
FROM (                 
     select x.thread_id, max(x.created_at) as maxdt, max (OID) maxo 
     from posts x 
     where x.circle_id IN (134) OR x.receiver_id=3 
     group by x.thread_id 
     ) as dt 
INNER JOIN posts p ON p.thread_id = dt.thread_id and p.created_at = dt.maxdt AND p.OID = dt.maxo 
ORDER BY p.created_at DESC 

Answer 2

這應該讓你有：

SELECT p.* 
FROM (                 
     select thread_id, max(created_at) as maxdt 
     from posts 
     where circle_id IN (134) OR (receiver_id=3) 
     ) as dt 
INNER JOIN posts p ON p.thread_id = dt.thread_id and p.created_at = dt.maxdt