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From "Hequn Cheng (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (FLINK-10834) TableAPI flatten() calculated value error
Date Fri, 09 Nov 2018 04:06:00 GMT

     [ https://issues.apache.org/jira/browse/FLINK-10834?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Hequn Cheng reassigned FLINK-10834:
-----------------------------------

    Assignee: Hequn Cheng

> TableAPI flatten() calculated value error
> -----------------------------------------
>
>                 Key: FLINK-10834
>                 URL: https://issues.apache.org/jira/browse/FLINK-10834
>             Project: Flink
>          Issue Type: Bug
>          Components: Table API &amp; SQL
>            Reporter: sunjincheng
>            Assignee: Hequn Cheng
>            Priority: Major
>             Fix For: 1.7.1
>
>
> We have a UDF as follows:
> {code:java}
> object FuncRow extends ScalarFunction {
>      def eval(v: Int): Row =
> {          val version = "" + new Random().nextInt()          val row = new
Row(3)          row.setField(0, version)          row.setField(1, version)    
     row.setField(2, version)          row }
> override def isDeterministic: Boolean = false
> override def getResultType(signature: Array[Class[_]]): TypeInformation[_] =
>  Types.ROW(Types.STRING, Types.STRING, Types.STRING)
> }
> {code}
> Do the following Query:
> {code:sql}
> val data = new mutable.MutableList[(Int, Long, String)]
>  data.+=((1, 1L, "Hi"))
>  val ds = env.fromCollection(data).toTable(tEnv, 'a, 'b,'c)
>  .select(FuncRow('a).flatten()).as('v1, 'v2, 'v3)
> {code}
> The result is : -1189206469,-151367792,1988676906
> The result expected by the user should be:  v1==v2==v3 .
> It looks the real reason is that there is no result of the reuse in codegen.
>  



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