Orphan nonperformant

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

SQL

# adapted from 76903 that was run on fawiki

#select page_title as "orphan page" from page as p
count(*) from page as p
where 
  page_title REGEXP '^Q'
  and NOT (
  page_title IN (
    SELECT pl1.pl_title
    FROM pagelinks AS pl1
    WHERE pl1.pl_namespace = 0
    AND pl1.pl_from_namespace = 0
    AND pl1.pl_from NOT IN (
    SELECT rd_from
    FROM redirect
    WHERE rd_namespace = 0
    AND rd_title = p.page_title
  	)
  )
)
#order by page_title
#limit 1;

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