behaviour of Lucene in tokenizing - causes query problems
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Key: LUCENE-779
URL: https://issues.apache.org/jira/browse/LUCENE-779
Project: Lucene - Java
Issue Type: Improvement
Components: Index
Environment: SLES9.3, JIRA 3.6.3 (Standalone)
Reporter: Suresh Chandran
Attachments: query error.doc
I recently submitted a problem with queries to Atlassian Support team and they
have pointed out that it is an issue with Lucene. I'm copying the contents from
my support request to Atlassian. Please help.
Question to Atlassian:
When I use "text search" to query an item from summary it gives me zero match.
But when I use query through custom field, I get results displayed properly.
In the attachment, I did a query for no: 10012363 using text search and I know
this entry is part of the summary for several issues. But the result says "no
matching issues found".
But when I selected, Vendor name and number, I get proper results. I tried
re-indexing, still no help
Response from Atlassian:
The reason why you couldn't receive any results from the query is due to the
behaviour of Lucene (an Apache-developed search and index library being used in
JIRA) in tokenizing.
For example, *Invoice Number-123456-API ASSOCIATES-10012363* is tokenized to:
{noformat}Invoice
Number-123456-API
ASSOCIATES-10012363{noformat}
In this case, {{Number-123456-API}} and {{ASSOCIATES-10012363}} are recognized
as {{NUM}} (e.g. floating point, serial, model numbers, ip addresses, etc.).
~(Hope this doesn't sound too technical to you.)~
You can somehow call this a limitation of the third party library. If you are
keen to have it improved, feel free to raise a support request at [our issue
tracker|http://jira.atlassian.com] or perhaps try asking it at [Lucene's issue
tracker|http://issues.apache.org/jira/browse/LUCENE].
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