phoenix-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (PHOENIX-2965) Use DistinctPrefixFilter logic for COUNT(DISTINCT ...) and COUNT(...) GROUP BY
Date Sat, 11 Jun 2016 04:50:21 GMT

     [ https://issues.apache.org/jira/browse/PHOENIX-2965?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Lars Hofhansl updated PHOENIX-2965:
-----------------------------------
    Attachment: 2965-v9.txt

-v9 is slightly more verbose, but easier to read and understand.
The nice thing about -v8 and later is that the changes to OrderPreservingTracker are not needed
(and those should have probably been a red-flag)

[~giacomotaylor], please have a careful look. I ran a selection of other tests... They all
pass. This _should_ be good to go again.

> Use DistinctPrefixFilter logic for COUNT(DISTINCT ...) and COUNT(...) GROUP BY
> ------------------------------------------------------------------------------
>
>                 Key: PHOENIX-2965
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-2965
>             Project: Phoenix
>          Issue Type: Sub-task
>            Reporter: Lars Hofhansl
>            Assignee: Lars Hofhansl
>             Fix For: 4.8.0
>
>         Attachments: 2965-v2.txt, 2965-v3.txt, 2965-v4.txt, 2965-v5.txt, 2965-v6.txt,
2965-v7.txt, 2965-v8.txt, 2965-v9.txt, 2965.txt, PHOENIX-2965_wip.patch
>
>
> Parent uses skip scanning to optimize DISTINCT and certain GROUP BY operations along
the row key.
> COUNT queries are optimized differently, could be sped up significantly as well.
> [~giacomotaylor], I might need to help into where COUNT(DISTINCT) queries are planned
and optimized.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Mime
View raw message