postgresql慢查詢（dblink和內部聯接）

Question

我有這個查詢包含一個dblink，因爲我需要連接到另一個數據庫，它似乎很慢（只有124記錄50.343秒）。有什麼辦法可以讓它變快嗎？下面是代碼：

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

丹尼爾·建議：

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'