Page intersections between a reference actor and one or more other actors with page edit counts

This query is marked as a draft This query has been published by Sean.hoyland.

Page intersections between a reference actor and one or more other actors with page edit counts. 
Edit counts for the other actors are summed e.g. edit counts for multiple ban evasion accounts with a single operator are summed.

SQL

-- page intersections between a reference actor and one or more other actors with page edits counts.
-- Edit counts for the other actors are summed e.g. editcounts for multiple ban evasion accounts 
-- with a single sockmaster are summed. 

-- reference account to be compared with one or more other accounts
set @x = 'Huldra'; 
-- set @y1 = '007Леони́д', @y2 = '11Fox11';
-- comma separated list of one or more other accounts - single quotes need to be escaped either by doubling or backslash
set @y = '
          ''007Леони́д'',''11Fox11'',''AnnieGrannyBunny'',''Astral Leap'',''AstuteRed'',
          ''Bob not snob'',''DoraExp'',''Double barrel pistol with both opposite direction'',''EnfantDeLaVille'',''Eostrix'',
          ''Free1Soul'',''Galamore'',''Geshem Bracha'',''Herpetogenesis'',''Hippeus'',
          ''I dream of Maple'',''Icewhiz'',''Jacinda01'',''JoeZ451'',''Just Prancing'',
          ''KasiaNL'',''LeftDreams'',''ManoelWild'',''Minden500'',''Molave Quinta'',
          ''Mrboondocks'',''Mvqr'',''O.maximov'',''OdNahlawi'',''PeleYoetz'',
          ''Pikavoom'',''PRL Dreams'',''Proud Indian Arnab'',''Purski'',''RCatesby'',
          ''SCNBAH'',''Seggallion'',''Semper honestus'',''Smoking Ethel'',''SunSun753457'',
          ''Świst lodu'',''Szymon Frank'',''The 2nd coming of Purski'',''UnspokenPassion'',''Uppagus'',
          ''VikingDrummer'',''WhizICE'',''Терпение не ненавижу''
';

-- the query
set @q = concat('
with xrev as (
	select ''x'' actor, ru.rev_page, count(*) editcount
	from actor_user au
	join revision_userindex ru on au.actor_id = ru.rev_actor and au.actor_name = ?
	group by 2
),
yrev as (
	select ''y'', ru.rev_page, count(*) editcount 
	from (
		select actor_id 
		from actor_user 
--        where actor_name in (?, ?)
        where actor_name in (',
@y,
')
    ) ysocks
	join revision_userindex ru on ysocks.actor_id = ru.rev_actor
	group by 2
)
select 
	xrev.rev_page, 
	convert(replace(p.page_title,''_'','' '') using utf8mb4) page_title, 
	p.page_namespace, 
	case
	when p.page_namespace = 0 then ''(Main/Article)''
	when p.page_namespace = 1 then ''Talk''
	when p.page_namespace = 2 then ''User''
	when p.page_namespace = 3 then ''User talk''
	when p.page_namespace = 4 then ''Wikipedia''
	when p.page_namespace = 5 then ''Wikipedia talk''
	when p.page_namespace = 6 then ''File''
	when p.page_namespace = 7 then ''File talk''
	when p.page_namespace = 8 then ''MediaWiki''
	when p.page_namespace = 9 then ''MediaWiki talk''
	when p.page_namespace = 10 then ''Template''
	when p.page_namespace = 11 then ''Template talk''
	when p.page_namespace = 12 then ''Help''
	when p.page_namespace = 13 then ''Help talk''
	when p.page_namespace = 14 then ''Category''
	when p.page_namespace = 15 then ''Category talk''
	when p.page_namespace = 100 then ''Portal''
	when p.page_namespace = 101 then ''Portal talk''
	when p.page_namespace = 118 then ''Draft''
	when p.page_namespace = 119 then ''Draft talk''
	when p.page_namespace = 710 then ''TimedText''
	when p.page_namespace = 711 then ''TimedText talk''
	when p.page_namespace = 828 then ''Module''
	when p.page_namespace = 829 then ''Module talk''
	else null
	end as namespace_desc, 
	case when p.page_is_redirect = 0 then ''No'' else ''Yes'' end page_is_redirect,
	xrev.editcount ''ref actor editcount'', 
	yrev.editcount ''other actor(s) editcount summed'' 
from xrev
join yrev on xrev.rev_page = yrev.rev_page
join page p on xrev.rev_page = p.page_id
order by 2,3');

-- build the statement, execute, deallocate
prepare s from @q;
-- execute s using @x, @y1, @y2
execute s using @x;
deallocate prepare s;

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