Re: BUG #13869: Right Join query that never ends

On Fri, Jan 15, 2016 at 8:16 AM, <zx-master(at)bigmir(dot)net> wrote:

> The following bug has been logged on the website:
>
> Bug reference: 13869
> Logged by: Rumato
> Email address: zx-master(at)bigmir(dot)net
> PostgreSQL version: 9.5.0
> Operating system: CentOS 7
> Description:
>
> Hi.
> On my old installation with pg 8.4 this query executes about 3 seconds, but
> on 9.5 it never ends and cpu usage rises up to 100% by postgres process.
>
> Problem is here near RIGHT OUTER JOIN
> Query works with LEFT OUTER JOIN and other inner joins
>
> If I will create 2 views from "AS info" (about 2k rows) and "AS all_res"
> (about 200 rows) tables it will not fix anything. BTW separate "AS info"
> query executes less than in 3 sec, "AS all_res" less than 1 sec.
>
> I have solved this problem by using WITH info, all_res queries. Now it
> works
> pretty fast.
>
> THE QUERY
> SELECT
> all_res.res_id reseller_id,
> 'keys' as descrip,
> count(info.company_name) as total,
> all_res.reseller_nm as reseller_name,
> all_res.email as reseller_email
> FROM (SELECT
> k.id AS key_id,
> (case when uidtype.keytype_id is null then null else k.uid end) AS
> key_guid,
> k.type_id as type_id,
> k.binding_ip_id AS binding_ip_id,
> ko_cl.parents AS ko_cl_parents,
> bc.id AS bc_id,
> ko_key.name AS key_number,
> ko_type.name AS keytype,
> kt.class AS keytype_class,
> ko_r.name AS reseller_name,
> ko_r.id AS reseller_id,
> bc.company_name AS company_name,
> to_char(ko_key.create_date, 'yyyy MM dd HH24 mi') AS create_date,
> k.terminated AS key_terminated,
> ku.login AS login,
> sld.value AS sld,
> exp_date.value AS expiration_date,
> kus.email
> FROM key k
> INNER JOIN ka_object ko_key ON (k.id = ko_key.id)
> INNER JOIN ka_object ko_type ON (k.type_id = ko_type.id)
> INNER JOIN key_type kt ON (k.type_id = kt.id)
> LEFT OUTER JOIN keytype_uidtype_reference uidtype ON
> uidtype.keytype_id=kt.id
> INNER JOIN ka_object ko_c ON (ko_key.parent_id = ko_c.id)
> INNER JOIN container keys_c ON (keys_c.id = ko_c.id and
> store_type='Key')
> INNER JOIN ka_object ko_cl ON (ko_c.parent_id = ko_cl.id)
> INNER JOIN client client ON (ko_cl.id = client.id)
> INNER JOIN ka_object ko_clc ON (ko_cl.parent_id = ko_clc.id)
> INNER JOIN base_client bc ON (client.id = bc.id)
> INNER JOIN ka_object ko_r ON (ko_clc.parent_id = ko_r.id)
> INNER JOIN ka_user ku ON (bc.id = ku.id)
> INNER JOIN ka_user kus ON (ko_r.id = kus.id)
> LEFT OUTER JOIN (SELECT kpr.keytype_id, kp.value
> FROM key_property_reference kpr
> INNER JOIN key_property kp ON (kpr.property_id =
> kp.id)
> WHERE kp.name = 'server_license_details' AND
> kp.value = 'billing'
> ) AS sld ON (sld.keytype_id = ko_type.id)
> LEFT OUTER JOIN key_value exp_date ON (k.id = exp_date.key_id AND
> exp_date.key_value_key_id=55 )
>
> WHERE
> ko_key.system='f'
> AND upper(bc.company_name) not like '%TEST%'
> AND k.terminated='f'
>
> ) AS info
>
> RIGHT OUTER JOIN (SELECT resellers.id as res_id, res.email as email,
> resellers.name as reseller_nm
> FROM ka_object resellers
> JOIN ka_user res ON (resellers.id = res.id)
> WHERE resellers.parent_id=33
> AND type = 'com.Reseller'
> AND system='f'
> AND upper(resellers.name) NOT LIKE '%TEST%'
> ) AS all_res ON all_res.res_id = info.reseller_id
>
> GROUP BY info.reseller_id, reseller_nm, all_res.email, all_res.res_id

​So, typically the first thing to do is run "EXPLAIN" (or EXPLAIN ANALYZE -
though if the query never finishes that won't help). Since you haven't
provided a self-contained test case you are going to need to do that for us.

David J.
​