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From "William Slacum (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-1682) Iterator and example to support intersection of document-partitioned index terms by ranges with lower and upper bounds.
Date Wed, 04 Sep 2013 13:06:51 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-1682?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13757725#comment-13757725
] 

William Slacum commented on ACCUMULO-1682:
------------------------------------------

And I completely blanked on being able to just create term sources on the fly by using a bounded
range plus a predicate (in case of something like a regular expression), but you run the risk
of running out of resources by opening too many readers. That can be side stepped by using
a max limit, but then you wouldn't get completely correct results.
                
> Iterator and example to support intersection of document-partitioned index terms by ranges
with lower and upper bounds.
> -----------------------------------------------------------------------------------------------------------------------
>
>                 Key: ACCUMULO-1682
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-1682
>             Project: Accumulo
>          Issue Type: Improvement
>            Reporter: Corey J. Nolet
>            Priority: Minor
>              Labels: proposal
>
> The current IntersectingIterator seeks to discrete terms that are encoded into the column
families to find all column qualifiers that share all of the discrete column families of interest
(with the additional ability to negate some of the column families). Looking at the current
IntersectingIterator code, it should be possible to return all column qualifiers with a column
family within a given range.
> An example of this is finding all terms where NAME=Joe and (AGE>=30 && AGE<60)
and STATE!=MD. If an example is provided, numerical types like the age could easily be encoded
using the new Lexicoders.

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