database - postgresql 慢查询（dblink 和内部连接）

Question

我有这个包含 dblink 的查询，因为我需要连接到另一个数据库，而且它看起来很慢（只有 124 条记录需要 50.343 秒）。有没有办法让它快点？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

正如丹尼尔所建议的：

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'