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https://issues.apache.org/jira/browse/FLINK-6968?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16396822#comment-16396822
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ASF GitHub Bot commented on FLINK-6968:
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GitHub user liurenjie1024 opened a pull request:
https://github.com/apache/flink/pull/5688
[FLINK-6968][Table API & SQL] Add Queryable table sink.
## What is the purpose of the change
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.
## Brief change log
- *Add a QueryableStateTableSink.*
- *States are queryable.*
## Verifying this change
This change added tests and can be verified as follows:
- *Added test that validates that states will be stored.*
- *Manually verified the change by running a 4 node cluser with 2
JobManagers and 4 TaskManagers, a stateful streaming program, and use
QueryableStateClient to test that.*
## Documentation
- Does this pull request introduce a new feature? yes
- If yes, how is the feature documented? docs
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/liurenjie1024/flink QueryableTableSink
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/5688.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #5688
----
commit 0663e550216dfef8bf205f90d5ac8a0e7e77a42b
Author: liurenjie1024 <liurenjie2008@...>
Date: 2018-03-12T07:32:44Z
Code complete
commit 6d62d53f0bae65249ab69bddf7932e62ae1e7897
Author: liurenjie1024 <liurenjie2008@...>
Date: 2018-03-13T09:44:30Z
Add test
commit c9ffa6ecdd638a497b60f3f063b2d352b1b98059
Author: liurenjie1024 <liurenjie2008@...>
Date: 2018-03-13T10:43:19Z
Fix test style
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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 & SQL
> Reporter: Fabian Hueske
> Assignee: Renjie Liu
> Priority: Major
>
> 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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