This problem was initially discussed here:

http://wikimedia.7.x6.nabble.com/SMW-upgrade-1-7-1-to-1-8-0-5-failed-what-s-wrong-tp5006725.html

I have:

• MediaWiki 1.18.3
• SMW 1.7.1

I followed these instructions

https://semantic-mediawiki.org/wiki/Help:Installation#With_shell_access

I added to LocalSettings.php:

$smwgDefaultStore = 'SMWSQLStore2';

I deleted the old Validator and SemanticMediaWiki directories, and then extracted SMW 1.8.0.5. Then, I ran:

php /path/to/extensions/SemanticMediaWiki/maintenance/SMW_setup.php -b SMWSQLStore3;

After that, the instructions say:

"The wiki should now work as normal, but using the old storage structures."

But, no queries return any data. The documentation indicates that this is not the desired result of this process, hence this bug report.

However, maybe MediaWiki 1.18.3 is no longer fully supported, and the documentation should be updated to reflect that? If so, then this bug report should be closed as WONTFIX, and then I can follow the updated instructions for upgrading to SMW 1.8.x.x, and the minimum requirements for SMW can have MW 1.18 removed. I suspect that a simultaneous upgrade to MediaWiki 1.19 or later would be required in that case. Being able to upgrade one component at a time would help with bug hunting, and would also hopefully reduce the disruption to an operating site.

Right now, I'm considering the possibility that I should warn the users to expect downtime, and upgrade everything and do all my bug hunting in one shot over the course of a few days.

Version: unspecified
Severity: normal