Filter doesn't really filter

[niklas88]

In the following query the last entity filtered out is acutally in the resultset. Checking for '==' to only get this entity doesn't work either. The first two on the other hand seem to get filtered out but switching the last two doesn't really filter now-second.

PREFIX fb: <http://rdf.freebase.com/ns/>

SELECT DISTINCT ?1 ?o ?o2 WHERE {
 fb:m.0fkvn fb:government.government_office_category.officeholders ?0 .
 ?0 fb:government.government_position_held.jurisdiction_of_office fb:m.0vmt .
 ?0 fb:government.government_position_held.office_holder ?1 .
 FILTER (?1 != fb:m.0fkvn && ?1 != fb:m.0vmt && ?1 != fb:m.018mts) 
} LIMIT 300

[Buchhold]

Combinations using && are not implemented, yet. There should really be an error message, though. Workaround: Use multiple Filter clauses

[niklas88]

Ok I tried but this crashes QLever:

PREFIX fb: <http://rdf.freebase.com/ns/>

SELECT DISTINCT ?1 ?o ?o2 WHERE {
 fb:m.0fkvn fb:government.government_office_category.officeholders ?0 .
 ?0 fb:government.government_position_held.jurisdiction_of_office fb:m.0vmt .
 ?0 fb:government.government_position_held.office_holder ?1 .
 FILTER (?1 != fb:m.0fkvn)
 FILTER (?1 != fb:m.0vmt)
 FILTER (?1 != fb:m.018mts) 
} LIMIT 300

[Buchhold]

crashes? or an error? FILTERS currently need dots like other triples. Looked it up and this should be changed

[niklas88]

Crash as in hard segfault, I tried with dots as well because I was unsure, both segfault

[Buchhold]

yeah, i will need to have a look. many filters used to work without problems, maybe this as something to do with the recent improvements for speed in aqqu that were concerning filters. will have a look asap

[niklas88]

That sounds like a great place to first create a test and then make it not fail

[Buchhold]

Fixed in this commit.