matej_suchanek created this task.
matej_suchanek added subscribers: matej_suchanek, Edgars2007.
matej_suchanek added a project: MediaWiki-extensions-WikibaseClient.
Herald added subscribers: StudiesWorld, Aklapper.
Herald added a project: Wikidata.

TASK DESCRIPTION
  Many pages listed in http://quarry.wmflabs.org/query/1257, eg. [[ 
https://cs.wikipedia.org/w/index.php?title=22_nanometer&redirect=no | the third 
one ]], have `pp_propname = 'wikibase_item'` and a `pp_value` although they are 
not connected with an item. Purging neither on the client nor the repo helps. 
Note that all those pages are redirects, so maybe the problem occurred when 
they were redirected.
  
  We can see another problem in the line with `page_title = Bitva_u_Bibrakte` 
which has `pp_value = 'q635028'`, ie. with lowercase. (There are even more.) 
This should be investigated as it can cause invalid results when `JOIN`ing with 
`wikidatawiki.page_title`.
  
  I got the first problem reported by @Edgars2007 few weeks ago.

TASK DETAIL
  https://phabricator.wikimedia.org/T119738

EMAIL PREFERENCES
  https://phabricator.wikimedia.org/settings/panel/emailpreferences/

To: matej_suchanek
Cc: Aklapper, StudiesWorld, Edgars2007, matej_suchanek, Wikidata-bugs, aude, 
Mbch331



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