Last modified: 2012-06-05 01:42:03 UTC
We had a property:State, with 3 subproperties State_Code, Offer2_Code, Product_Code, all of type page. When adding State_code as a subproperty of State and resaving the article with Property:State on it, the pages with queries referencing Property:State no longer worked. Specifically, the query looked like this (format=count): SELECT /* SMW::getQueryResult WikiSysop */ COUNT(DISTINCT t8.smw_id) AS count FROM `smw_ids` AS t8 INNER JOIN `smw_inst2` AS t1 ON t8.smw_id=t1.s_id INNER JOIN `smw_atts2` AS t3 ON t1.s_id=t3.s_id INNER JOIN `smw_rels2` AS t5 ON t1.s_id=t5.s_id INNER JOIN `t6` AS t6 ON t5.p_id=t6.id WHERE (t1.o_id='599447' AND (t3.p_id='572930') AND (t5.o_id='578754')) LIMIT 10001 The query would hang forever until killed in mysql. When entered in the terminal, would return an error instantly - as "... INNER JOIN `t6` AS t6 ON t5.p_id=t6.id ..." table t6 does not exist. Removing State_Code as a subproperty (but leaving the other 2) fixed the query. Also, it might be important to note that State_Code has about 23million values.
Is still issue still present on SMW 1.6?
This bug is open for over a year and the initial requester did not respond to Jeroen's question therefore we might close this one. For the next request SMW version/MW version would be helpful in order to make a full diagnosis.