xiangdong Huang created IOTDB-358:
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Summary: Questions about the `group by` down-samplying clause
Key: IOTDB-358
URL: https://issues.apache.org/jira/browse/IOTDB-358
Project: Apache IoTDB
Issue Type: Bug
Affects Versions: 0.9.0
Reporter: xiangdong Huang
When reading issue #331, I read the `group by` document again and find some
confusing contents:
V0.9:
[http://iotdb.apache.org/#/Documents/0.9.0/chap5/sec2]
# (minor), typo, Fig 5.2 rather than Fig 3.2
# The first parameter of the GROUP BY statement above is the time interval for
dividing the time axis. Taking this parameter (1d) as time interval and the
default origin as the dividing origin, the time axis is divided into several
continuous intervals, which are [0,1d], [1d, 2d], [2d, 3d], etc.
My question is, is the data point at 1d calculated twice?
V0.10:
[http://iotdb.apache.org/#/Documents/progress/chap5/sec2]
the syntax is quite different with v0.9.0. I originally thought it was an
improvement comparing with 0.9, but when I read the document, I find it loses
the ability to define the start point of the timestamp for splitting the time
window.
Can someone tell me why to design like this?
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