[Xapian-tickets] [Xapian] #418: wildcard search in omega
Xapian
nobody at xapian.org
Thu Dec 10 01:17:39 GMT 2009
#418: wildcard search in omega
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Reporter: do | Owner: olly
Type: enhancement | Status: new
Priority: normal | Milestone: 1.2.x
Component: Omega | Version: 1.0.17
Severity: normal | Keywords:
Blockedby: | Platform: All
Blocking: |
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Changes (by olly):
* milestone: => 1.2.x
Comment:
Omega really needs a generic way to set (or clear) !QueryParser flags. We
can cleanly add that in 1.2.x without breaking compatibility, so setting
the milestone.
We can't ''"just search by prefix"'' as we don't have an index which tells
us all the documents which match a given term prefix. So we have to merge
the posting lists for all the terms that the wildcard expands to.
It is possible to keep an index for term prefixes to accelerate wildcard
expansions (see #207), but that will take significantly more space. For
most users that probably isn't worthwhile so it's likely to be an index-
time choice.
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Ticket URL: <http://trac.xapian.org/ticket/418#comment:1>
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