#225: Stemming breaks wildcard search
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Reporter: bthiell | Owner:
Type: defect | Status: new
Priority: major | Milestone:
Component: WebSearch | Version:
Keywords: |
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'''Problem:'''
{{{
In [17]: s.perform_request_search(p='Astrophysics')
Out[17]: [8, 11, 15]
In [18]: s.perform_request_search(p='Astrophysi*')
Out[18]: []
}}}
'''Cause:'''
The global index is in Invenio stemmed by default and therefore the term
stored for "Astrophysics" in the database is "Astrophys". When performing
a wildcard search, the MySQL request is then "WHERE term LIKE
'astrophysi%'" and no results are found.
This problem is easily understandable for a developer who knows about the
indexes and the stemming procedure however it is a surprising undesired
"feature" for a normal user as the second search is the example is a
broader search than the first one but returns less hits.
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Ticket URL: <http://invenio-software.org/ticket/225>
Invenio <http://invenio-software.org>
