[ 
https://issues.apache.org/jira/browse/FLINK-7426?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16124525#comment-16124525
 ] 

Jark Wu commented on FLINK-7426:
--------------------------------

Shouldn't this be pushed into DataStream component? I'm just worry about it 
will come back again when we develop new features.

> Table API does not support null values in keys
> ----------------------------------------------
>
>                 Key: FLINK-7426
>                 URL: https://issues.apache.org/jira/browse/FLINK-7426
>             Project: Flink
>          Issue Type: Bug
>          Components: Table API & SQL
>    Affects Versions: 1.3.2
>            Reporter: Timo Walther
>
> The Table API uses {{keyBy}} internally, however, the generated 
> {{KeySelector}} uses instances of {{Tuple}}. The {{TupleSerializer}} is not 
> able to serialize null values. This causes issues during checkpointing or 
> when using the RocksDB state backend. We need to replace all {{keyBy}} calls 
> with a custom {{RowKeySelector}}.
> {code}
> class AggregateITCase extends StreamingWithStateTestBase {
>   private val queryConfig = new StreamQueryConfig()
>   queryConfig.withIdleStateRetentionTime(Time.hours(1), Time.hours(2))
>   @Test
>   def testDistinct(): Unit = {
>     val env = StreamExecutionEnvironment.getExecutionEnvironment
>     env.setStateBackend(getStateBackend)
>     val tEnv = TableEnvironment.getTableEnvironment(env)
>     StreamITCase.clear
>     val t = StreamTestData.get3TupleDataStream(env).toTable(tEnv, 'a, 'b, 'c)
>       .select('b, Null(Types.LONG)).distinct()
>     val results = t.toRetractStream[Row](queryConfig)
>     results.addSink(new StreamITCase.RetractingSink).setParallelism(1)
>     env.execute()
>     val expected = mutable.MutableList("1,null", "2,null", "3,null", 
> "4,null", "5,null", "6,null")
>     assertEquals(expected.sorted, StreamITCase.retractedResults.sorted)
>   }
> {code}



--
This message was sent by Atlassian JIRA
(v6.4.14#64029)

Reply via email to