ASF GitHub Bot commented on FLINK-6968:

xhumanoid commented on a change in pull request #6434: [FLINK-6968] [table] Add 
Queryable table sink.
URL: https://github.com/apache/flink/pull/6434#discussion_r209297911

 File path: flink-libraries/flink-table/pom.xml
 @@ -186,6 +186,13 @@ under the License.
+               <dependency>
+                       <groupId>org.apache.flink</groupId>
 Review comment:
   replace hardcoded 2.11 with ${scala.binary.version}

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> Store streaming, updating tables with unique key in queryable state
> -------------------------------------------------------------------
>                 Key: FLINK-6968
>                 URL: https://issues.apache.org/jira/browse/FLINK-6968
>             Project: Flink
>          Issue Type: New Feature
>          Components: Table API &amp; SQL
>            Reporter: Fabian Hueske
>            Assignee: Renjie Liu
>            Priority: Major
>              Labels: pull-request-available
> Streaming tables with unique key are continuously updated. For example 
> queries with a non-windowed aggregation generate such tables. Commonly, such 
> updating tables are emitted via an upsert table sink to an external datastore 
> (k-v store, database) to make it accessible to applications.
> This issue is about adding a feature to store and maintain such a table as 
> queryable state in Flink. By storing the table in Flnk's queryable state, we 
> do not need an external data store to access the results of the query but can 
> query the results directly from Flink.

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