[Xapian-tickets] [Xapian] #464: get_matches_estimated() can be wrong when collapsing

[Xapian]

#464: get_matches_estimated() can be wrong when collapsing
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 Reporter:  olly     |       Owner:  olly 
     Type:  defect   |      Status:  new  
 Priority:  normal   |   Milestone:  1.1.6
Component:  Matcher  |     Version:  1.1.4
 Severity:  normal   |    Keywords:       
Blockedby:           |    Platform:  All  
 Blocking:           |  
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Changes (by sascha_silbe):

 * cc: sascha-web-trac.xapian.org@… (added)


Comment:

 I am (or was - last tried in January with the then-current version of
 Xapian in Debian squeeze) seeing a very similar (or identical) issue in my
 [http://git.sugarlabs.org/projects/sugar-
 datastore/repos/silbe/trees/20c9631e6329d8f64bbae87a53a8203809e44d22
 version support branch] for the Sugar data store, but never managed to get
 reproducible test cases. It only happens when offset/limit are used, so my
 [http://git.sugarlabs.org/projects/sugar-
 datastore/repos/silbe/commits/0fbb69608e369771f499f9d1f275b5d80dc24160
 current workaround] is to implement offset/limit on the Python side (with
 the expected impact on performance).

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Ticket URL: <http://trac.xapian.org/ticket/464#comment:3>
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