需要使连接使用列数据作为通用匹配的通配符

Question

大家好，我正在尝试使用 table 中仅包含 URLS 的数据，看看我的主 URLS 是否有任何变化或使用它们 URLS =23=]

                  url                                                                                               │··························································································
---------------------------------------                                                                             │··························································································
 .0.9.40.52                                                                                                         │··························································································
 .00000000314.0000000265.00000225.0323                                                                              │··························································································
 .001916.com                                                                                                        │··························································································
 .00386.com                                                                                                         │··························································································
 .00-5dj-ar4c.club                                                                                                  │··························································································
 .007band.ru                                                                                                        │··························································································
 .007crconcert-japan.com                                                                                            │··························································································
 .007pi.com                                                                                                         │··························································································
 .00dt7myo.work                                                                                                     │··························································································
 .00dzhqbghr.com                                                                                                    │··························································································
(10 rows)

主要Table

 user_id | campaign_id |                                                                                                          url
                                |      send_time
---------+-------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
--------------------------------+---------------------
 8468677 |     1004001 | http://twitter.com/share?url=http%3A%2F%2Fatwonline.com%2Faircraft-orders-deliveries%2Fnigeria-s-arik-air-replaces-boeing-747s-787s&text=Nigeria%E2%80%99s+Arik+Air+replaces+Boeing+74
7s+with+787s&count=none         | 2017-01-28 13:01:28
 8468677 |     1003945 | http://twitter.com/share?url=http%3A%2F%2Fatwonline.com%2Fairframes%2Fairbaltic-cs300-performance-exceeding-expectations&text=AirBaltic%3A+CS300+performance+%E2%80%98exceeding+expect
ations%E2%80%99&count=none      | 2017-01-14 13:03:29
 8468677 |     1004189 | http://twitter.com/share?url=http%3A%2F%2Fatwonline.com%2Fairframes%2Famerican-again-defers-a350-deliveries-first-pushed-back-2020&text=American+again+defers+A350+deliveries%3B+first
+pushed+back+to+2020&count=none | 2017-05-02 12:02:04
 8468677 |     1004057 | http://twitter.com/share?url=http%3A%2F%2Fatwonline.com%2Fairframes%2Fatlas-has-acquired-all-20-767s-be-operated-amazon&text=Atlas+has+acquired+all+20+767s+to+be+operated+for+Amazon&
count=none                      | 2017-02-28 13:02:13
(4 rows)

我正在尝试运行以下内容

select t1.user_id,t1.campaign_id,t1.url
from madison_alldb as t1
inner join madison_url as t2
ON t1.url LIKE CONCAT('%',t1.url, '%');

但是当我回到我的 tmux 时，它只是说 Killed.. 我也不确定上面的方法是否有效。

我的目标是限制拥有与我的 URL table 通配符匹配的域的用户。

Answer 1

这种类型的查询很难优化。一个小的优化是使用 exists 而不是 join:

select ma.*
from madison_alldb ma
where exists (select 1
              from madison_url mu
              where ma.url like concat('%', mu.url, '%')
             )
limit 10;

不过，这还是要做嵌套循环连接。唯一的区别是匹配时比较少。

需要使连接使用列数据作为通用匹配的通配符

Need to make a join use column data as wild card for common match

sql

database

psql