Author: physik
Description:
The page of the Ackermann function
https://en.wikipedia.org/wiki/Ackermann_function#Expansion
in LaTeXML rendering mode that is enabled for example here
http://ntcir11-wmc.nii.ac.jp/index.php/Ackermann%20function
rerenderes the long expansion on every page visit.
Version: unspecified
Severity: minor
physik wrote:
It seems to be a problem with the database layout.
The mathml column is too short...
Select count(l), l from (SELECT length(math_mathml) l FROM mediawiki.mathlatexml order by length(math_mathml) desc) t group by l order by l desc;
Indicates that 35/312240 mathml expression are longer than 65535.
physik wrote:
The Latexml table can be updated via
ALTER TABLE mathlatexml
CHANGE COLUMN math_mathml math_mathml MEDIUMBLOB NULL DEFAULT NULL ;
physik wrote:
After the update the affected pages need to be rerendered.
The affected pages can be obtained via
select distinct mathindex_page_id as oldid from mathlatexml join mathindex on mathindex_inputhash = math_inputhash where length(math_mathml)=65535;
This list can be used for manual purging. Note that the the mathindex_page_id refers to the oldid.
Change 171627 had a related patch set uploaded by Physikerwelt:
Increase size of the math_mathml in the mathlatexml table
physik wrote:
After having reloaded all 35 pages via curl
curl http://ntcir11-wmc.nii.ac.jp/index.php?oldid=15477
the problem seems to be fixed.
The longest mathml expression is 129726 chars now.
Change 171627 merged by jenkins-bot:
Increase size of the math_mathml in the mathlatexml table