[
https://issues.apache.org/jira/browse/KYLIN-3186?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16548904#comment-16548904
]
ASF subversion and git services commented on KYLIN-3186:
--------------------------------------------------------
Commit 7f2aa5ad3cbdac59763b7539f1d31bf099d51cb5 in kylin's branch
refs/heads/master from chao long
[ https://gitbox.apache.org/repos/asf?p=kylin.git;h=7f2aa5a ]
KYLIN-3186 expand partition-date-column format
> Add support for partitioning columns that combine date and time (e.g.
> YYYYMMDDHHMISS)
> -------------------------------------------------------------------------------------
>
> Key: KYLIN-3186
> URL: https://issues.apache.org/jira/browse/KYLIN-3186
> Project: Kylin
> Issue Type: Improvement
> Components: Others
> Affects Versions: v2.2.0
> Reporter: Vsevolod Ostapenko
> Priority: Major
> Fix For: v2.5.0
>
>
> In a multitude of existing enterprise applications partitioning is done on a
> single column that fuse date and time into a single value (string, integer or
> big integer). Typical formats are YYYYMMDDHHMM or YYYYMMDDHHMMSS (e.g.
> 201801181621 and 20180118154734).
> Such representation is human readable and provides natural sorting of the
> date/time values.
> Lack of support for such date/time representation requires some ugly
> workarounds, like creating views that split date and time into separate
> columns or data copying into tables with different partitioning scheme, none
> of which is a particularly good solution.
> More over, using views approach on Hive causes severe performance issues, due
> to inability of Hive optimizer correctly analyze filtering conditions
> auto-generated by Kylin during the flat table build step.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
