accumulo-notifications mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Eric Newton (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (ACCUMULO-906) Combiners documention could be improved
Date Wed, 19 Dec 2012 17:23:12 GMT

     [ https://issues.apache.org/jira/browse/ACCUMULO-906?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Eric Newton resolved ACCUMULO-906.
----------------------------------

    Resolution: Fixed

fixed with 1423966.
                
> Combiners documention could be improved
> ---------------------------------------
>
>                 Key: ACCUMULO-906
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-906
>             Project: Accumulo
>          Issue Type: Bug
>    Affects Versions: 1.4.1, 1.4.0, 1.4.2
>            Reporter: Eric Newton
>            Assignee: Eric Newton
>            Priority: Blocker
>             Fix For: 1.5.0, 1.4.3
>
>
> Goal: sum all the values across all columns.
> {noformat}
> > createtable animal
> > deleteiter -n vers -scan -minc -majc
> > setiter -t animal -p 10 -scan -n sum -class org.apache.accumulo.core.iterators.user.SummingCombiner
> SummingCombiner interprets Values as Longs and adds them together.  A variety of encodings
(variable length, fixed length, or string) are available
> ----------> set SummingCombiner parameter all, set to true to apply Combiner to every
column, otherwise leave blank. if true, columns option will be ignored.: true
> ----------> set SummingCombiner parameter columns, <col fam>[:<col qual>]{,<col
fam>[:<col qual>]} escape non-alphanum chars using %<hex>.: 
> ----------> set SummingCombiner parameter lossy, if true, failed decodes are ignored.
Otherwise combiner will error on failed decodes (default false): <TRUE|FALSE>: 
> ----------> set SummingCombiner parameter type, <VARLEN|FIXEDLEN|STRING|fullClassName>:
STRING
> > insert mammal cow ellie 1
> > insert mammal cow nell  1
> > insert mammal man eric  1
> > scan
> expected: mammal dontcare : dontcare 3
> {noformat}
> Where "dontcare" can come back with anything; I just don't care.
> But I just get this
> {noformat}
> mammal cow:ellie []    1
> mammal cow:nell []    1
> mammal man:eric []    1
> {noformat}
> I can't get the combiner to come back with a sum of mammals or cows.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira

Mime
View raw message