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Posted to issues@flink.apache.org by "sunjincheng (JIRA)" <ji...@apache.org> on 2018/01/03 14:31:00 UTC
[jira] [Updated] (FLINK-8325) Add COUNT support constant parameter,
COUNT(*), COUNT(1)
[ https://issues.apache.org/jira/browse/FLINK-8325?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
sunjincheng updated FLINK-8325:
-------------------------------
Summary: Add COUNT support constant parameter, COUNT(*), COUNT(1) (was: Add support for constant parameters in GROUP WINDOW aggregate)
> Add COUNT support constant parameter, COUNT(*), COUNT(1)
> --------------------------------------------------------
>
> Key: FLINK-8325
> URL: https://issues.apache.org/jira/browse/FLINK-8325
> Project: Flink
> Issue Type: Bug
> Components: Table API & SQL
> Affects Versions: 1.5.0
> Reporter: sunjincheng
> Assignee: sunjincheng
>
> COUNT(1) with Group Window, always output 0.
> e.g.
> DATA:
> {code}
> val data = List(
> (1L, 1, "Hi"),
> (2L, 2, "Hello"),
> (4L, 2, "Hello"),
> (8L, 3, "Hello world"),
> (16L, 3, "Hello world"))
> {code}
> SQL:
> {code}
> SELECT b, COUNT(1) FROM MyTable GROUP BY Hop(proctime, interval '0.001' SECOND, interval '0.002' SECOND),b
> {code}
> OUTPUT:
> {code}
> 1,0,1,
> 1,0,1,
> 2,0,1,
> 2,0,1,
> 2,0,2,
> 3,0,1,
> 3,0,1
> {code}
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