Could you check this: https://issues.apache.org/jira/browse/KYLIN-1427
Alb On 19 January 2018 at 21:33, Vsevolod Ostapenko (JIRA) <j...@apache.org> wrote: > Vsevolod Ostapenko created KYLIN-3186: > ----------------------------------------- > > Summary: 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: General > Affects Versions: v2.2.0 > Reporter: Vsevolod Ostapenko > > > 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) >
