[
https://issues.apache.org/jira/browse/DERBY-472?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12680140#action_12680140
]
Rick Hillegas commented on DERBY-472:
-------------------------------------
Geoff Hendrey describes benefits he'd like to see from a Lucene integration:
http://www.nabble.com/vote-for-Lucene-integration!-td22407382.html#a22407382
> Full Text Indexing / Full Text Search
> -------------------------------------
>
> Key: DERBY-472
> URL: https://issues.apache.org/jira/browse/DERBY-472
> Project: Derby
> Issue Type: New Feature
> Components: SQL
> Affects Versions: 10.0.2.0
> Environment: All environments
> Reporter: Rick Hillegas
>
> Efficiently support full text search of string datatyped columns. Mag Gam
> raised this issue on the user's mailing list on 24 July 2005; the email
> thread is titled 'Full Text Indexing'. Mag wants to see something akin to the
> functionality in tsearch2
> (http://www.sai.msu.su/~megera/postgres/gist/tsearch/V2/). Dan points out
> that we may be able to re-use index building technology exposed by the apache
> Lucene project (http://lucene.apache.org/).
> Presumably we want to build inverted indexes on all string datatyped columns:
> CHAR, VARCHAR, LONG VARCHAR, CLOB,, and their national variants (when they
> are implemented). We should consider the following additional issues when
> specifying this feature:
> 1) Do we also want to support text search on XML columns?
> 2) Which human languages do we support initially? Each language has its own
> rules for lexing words and its own list of "noise" words which should not be
> indexed. Hopefully, we can plug-in some existing packages of lexers and noise
> filters. We should encourage users to donate additional lexers/fitlers.
> 3) The CREATE INDEX syntax (for these new inverted indexes) should let us
> bind a lexing human language to a string-datatyped column.
> 4) How do we express the search condition? For case-sensitive searches we can
> get away with boolean expressions built out of standard LIKE clauses.
> However, in my opinion, case-sensitive searches are an edge case. The more
> useful situation is a case-insensitive search. Can we get away with
> introducing a non-standard function here or do we need to push a proposal
> through the standards commitees? Even more useful and non-standard are fuzzy
> searches, which tolerate bad spellers.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
