postgresql慢查询（dblink和内部联接）

Question

我有这个查询包含一个dblink，因为我需要连接到另一个数据库，它似乎很慢（只有124记录50.343秒）。有什么办法可以让它变快吗？下面是代码：

select * 
from 
    customer 
    INNER JOIN 
    dblink('host=192.168.3.9 dbname=db2 user=postgres password=postgres', ' 
     SELECT 
      status, 
      last_churn_1, 
      attempts, 
      last_dialed, 
      lead_id, 
      date_added 
     FROM campaign_customer 
     ') AS table2 (
      status char(50), 
      last_churn_1 char(50), 
      attempts int, 
      last_dialed char(250), 
      lead_id char(8), 
      date_added char(50) 
     ) ON customer.phone1 = table2.last_dialed 
where customer.leadid = '3434' and table2.lead_id='3434' 

Answer 1

丹尼尔·建议：

select * 
from 
    customer 
    INNER JOIN 
    dblink('host=192.168.3.9 dbname=db2 user=postgres password=postgres', $$ 
     SELECT 
      status, 
      last_churn_1, 
      attempts, 
      last_dialed, 
      lead_id, 
      date_added 
     FROM campaign_customer 
     where lead_id='3434' 
     $$) AS table2 (
      status char(50), 
      last_churn_1 char(50), 
      attempts int, 
      last_dialed char(250), 
      lead_id char(8), 
      date_added char(50) 
     ) ON customer.phone1 = table2.last_dialed 
where customer.leadid = '3434'