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[ZflLnZjakVvKw-9xh9MHZQAAAAc] /index.php/Toiminnot:T%C3%A4nne_viittaavat_sivut/ITS_Factory_Developer_Newsletter_2-2014 Wikimedia\Rdbms\DBQueryError: A database query error has occurred. Did you forget to run your application's database schema updater after upgrading or after adding a new extension?

Please see https://www.mediawiki.org/wiki/Special:MyLanguage/Manual:Upgrading and https://www.mediawiki.org/wiki/Special:MyLanguage/Manual:How_to_debug for more information.

Error 1054: Unknown column 'pl_from_namespace' in 'where clause' (db.infotripla.fi)
Function: SpecialWhatLinksHere::showIndirectLinks
Query: SELECT page_id,page_namespace,page_title,rd_from,rd_fragment,page_is_redirect FROM (SELECT pl_from,rd_from,rd_fragment FROM `pagelinks` LEFT JOIN `redirect` ON ((rd_from = pl_from) AND rd_title = 'ITS_Factory_Developer_Newsletter_2-2014' AND rd_namespace = 0 AND (rd_interwiki = '' OR rd_interwiki IS NULL)) WHERE pl_namespace = 0 AND pl_title = 'ITS_Factory_Developer_Newsletter_2-2014' AND pl_from_namespace IN (0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15) ORDER BY pl_from_namespace ASC,pl_from ASC LIMIT 102 ) `temp_backlink_range` JOIN `page` ON ((pl_from = page_id)) ORDER BY page_namespace ASC,page_id ASC LIMIT 51

Backtrace:

from /var/www/html/includes/libs/rdbms/database/Database.php(1606)
#0 /var/www/html/includes/libs/rdbms/database/Database.php(1590): Wikimedia\Rdbms\Database->getQueryException()
#1 /var/www/html/includes/libs/rdbms/database/Database.php(1564): Wikimedia\Rdbms\Database->getQueryExceptionAndLog()
#2 /var/www/html/includes/libs/rdbms/database/Database.php(1173): Wikimedia\Rdbms\Database->reportQueryError()
#3 /var/www/html/includes/libs/rdbms/database/Database.php(1810): Wikimedia\Rdbms\Database->query()
#4 /var/www/html/includes/libs/rdbms/querybuilder/SelectQueryBuilder.php(641): Wikimedia\Rdbms\Database->select()
#5 /var/www/html/includes/specials/SpecialWhatLinksHere.php(304): Wikimedia\Rdbms\SelectQueryBuilder->fetchResultSet()
#6 /var/www/html/includes/specials/SpecialWhatLinksHere.php(320): SpecialWhatLinksHere::{closure}()
#7 /var/www/html/includes/specials/SpecialWhatLinksHere.php(137): SpecialWhatLinksHere->showIndirectLinks()
#8 /var/www/html/includes/specialpage/SpecialPage.php(671): SpecialWhatLinksHere->execute()
#9 /var/www/html/includes/specialpage/SpecialPageFactory.php(1378): SpecialPage->run()
#10 /var/www/html/includes/MediaWiki.php(315): MediaWiki\SpecialPage\SpecialPageFactory->executePath()
#11 /var/www/html/includes/MediaWiki.php(912): MediaWiki->performRequest()
#12 /var/www/html/includes/MediaWiki.php(563): MediaWiki->main()
#13 /var/www/html/index.php(57): MediaWiki->run()
#14 /var/www/html/index.php(50): wfIndexMain()
#15 {main}