[Xapian-tickets] [Xapian] #207: Add ability to accelerate wildcard queries for short terms

[Xapian]

#207: Add ability to accelerate wildcard queries for short terms
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 Reporter:  richard      |             Owner:  richard
     Type:  enhancement  |            Status:  new
 Priority:  normal       |         Milestone:
Component:  QueryParser  |           Version:  SVN trunk
 Severity:  normal       |        Resolution:
 Keywords:               |        Blocked By:
 Blocking:               |  Operating System:  All
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Changes (by olly):

 * type:  defect => enhancement


Comment:

 Now we have OP_WILDCARD, this would need to happen when that gets turned
 into a tree of !PostList objects.

 However, OP_WILDCARD plus an earlier change to reuse the btree cursor when
 turning the query into postlists mean that wildcards are significantly
 faster now, so possibly this idea is no longer worthwhile - it would
 presumably add a significant amount to the database size, and that has
 caching implications.

 Also, the patch in #608 provides a way to greatly reduce the number of
 terms involved in for short partial queries while still offering useful
 expansions.

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Ticket URL: <http://trac.xapian.org/ticket/207#comment:5>
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