Vsevolod Ostapenko created KYLIN-3186:
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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.
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