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Explain Analyze breaks with recommendation #3
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ghost
assigned TheSoundDefense
Nov 26, 2013
This is an unexpected side effect of the latest optimization (enhanced user filtering). Working on a fix. |
@TheSoundDefense Any update on this? Kudos on your great work! |
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EXPLAIN ANALYZE breaks with a recommendation query. To reproduce the problem, first load the MovieLens dataset and then perform the following queries:
CREATE RECOMMENDER MovieRec ON ml_ratings USERS FROM userid ITEMS FROM itemid EVENTS FROM ratingval USING itemcoscf;
Then execute the following:
EXPLAIN ANALYZE SELECT * FROM ml_ratings RECOMMEND itemid TO userid ON ratingval USING itemcoscf WHERE userid = 1 ORDER BY ratingval LIMIT 10;
The back-end ends unexpectedly and returns a segmentation fault.
Note that EXPLAIN alone works just fine.
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