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https://issues.apache.org/jira/browse/FLINK-8866?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16524004#comment-16524004
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ASF GitHub Bot commented on FLINK-8866:
---------------------------------------

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

    https://github.com/apache/flink/pull/6201#discussion_r198142339
  
    --- Diff: 
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/connector/TableConnectorFactoryService.scala
 ---
    @@ -98,10 +98,12 @@ object TableSourceFactoryService extends Logging {
             plainContext.remove(STATISTICS_PROPERTY_VERSION)
     
             // check if required context is met
    -        if (plainContext.forall(e => properties.contains(e._1) && 
properties(e._1) == e._2)) {
    +        if 
(properties.get(TableDescriptorValidator.TABLE_TYPE).get.equals(factory.tableType())
 &&
    --- End diff --
    
    Consider cases where the type has not been set. Btw 
`properties.get(TableDescriptorValidator.TABLE_TYPE).get` can be simplified to 
`properties(TableDescriptorValidator.TABLE_TYPE)`. It might be useful to enable 
more warnings in your IDE.


> 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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