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https://issues.apache.org/jira/browse/FLINK-8866?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16535682#comment-16535682
 ] 

ASF GitHub Bot commented on FLINK-8866:
---------------------------------------

Github user suez1224 commented on a diff in the pull request:

    https://github.com/apache/flink/pull/6201#discussion_r200806113
  
    --- Diff: 
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/plan/nodes/PhysicalTableSourceScan.scala
 ---
    @@ -39,9 +39,12 @@ abstract class PhysicalTableSourceScan(
     
       override def deriveRowType(): RelDataType = {
         val flinkTypeFactory = 
cluster.getTypeFactory.asInstanceOf[FlinkTypeFactory]
    -    val streamingTable = table.unwrap(classOf[TableSourceTable[_]]) match {
    -      case _: StreamTableSourceTable[_] => true
    -      case _: BatchTableSourceTable[_] => false
    +    val streamingTable = table.unwrap(classOf[TableSourceSinkTable[_, _]]) 
match {
    +      case t: TableSourceSinkTable[_, _] => t.tableSourceTableOpt match {
    +        case _: StreamTableSourceTable[_] => true
    --- End diff --
    
    good catch.


> Create unified interfaces to configure and instatiate TableSinks
> ----------------------------------------------------------------
>
>                 Key: FLINK-8866
>                 URL: https://issues.apache.org/jira/browse/FLINK-8866
>             Project: Flink
>          Issue Type: New Feature
>          Components: Table API & SQL
>            Reporter: Timo Walther
>            Assignee: Shuyi Chen
>            Priority: Major
>              Labels: pull-request-available
>
> Similar to the efforts done in FLINK-8240. We need unified ways to configure 
> and instantiate TableSinks. Among other applications, this is necessary in 
> order to declare table sinks in an environment file of the SQL client. Such 
> that the sink can be used for {{INSERT INTO}} statements.
> Below are a few major changes in mind. 
> 1) Add TableSinkFactory/TableSinkFactoryService similar to 
> TableSourceFactory/TableSourceFactoryService
> 2) Add a common property called "type" with values (source, sink and both) 
> for both TableSource and TableSink.
> 3) in yaml file, replace "sources" with "tables", and use tableType to 
> identify whether it's source or sink.



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