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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-8325) Add COUNT AGG support constant parameter, i.e. COUNT(*), COUNT(1)
Date Tue, 09 Jan 2018 14:11:00 GMT

    [ https://issues.apache.org/jira/browse/FLINK-8325?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16318461#comment-16318461
] 

ASF GitHub Bot commented on FLINK-8325:
---------------------------------------

Github user sunjincheng121 commented on a diff in the pull request:

    https://github.com/apache/flink/pull/5241#discussion_r160414914
  
    --- Diff: flink-libraries/flink-table/src/test/scala/org/apache/flink/table/runtime/batch/sql/JoinITCase.scala
---
    @@ -254,7 +254,7 @@ class JoinITCase(
         val table = CollectionDataSets.getSmall3TupleDataSet(env).toTable(tEnv).as('a1, 'a2,
'a3)
         tEnv.registerTable("A", table)
     
    -    val sqlQuery2 = "SELECT * FROM (SELECT count(*) FROM A) CROSS JOIN A"
    --- End diff --
    
    Yes, when using `COUNT(*) ` we must change result expect. 
    ``` 
     expected: [3,1,1,Hi, 3,2,2,Hello, 3,3,2,Hello world]
     received: [4,1,1,Hi, 4,2,2,Hello, 4,3,2,Hello world] 
    ```


> Add COUNT AGG support constant parameter, i.e. 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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