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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-3727) Add support for embedded streaming SQL (projection, filter, union)
Date Wed, 20 Apr 2016 16:31:25 GMT

    [ https://issues.apache.org/jira/browse/FLINK-3727?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15250196#comment-15250196
] 

ASF GitHub Bot commented on FLINK-3727:
---------------------------------------

GitHub user vasia opened a pull request:

    https://github.com/apache/flink/pull/1917

    [FLINK-3727] Embedded streaming SQL projection, filtering, union

    This PR adds support for embedded streaming SQL (projection, filtering, union):
    - methods to register DataStreams
    - sql translation method in StreamTableEnvironment
    - a custom rule to convert to streamable table
    - docs for streaming table and sql
    - java SQL tests
    
    A streaming SQL query can be executed on a streaming Table by simply adding the `STREAM`
keyword in front of the table name. Registering DataStream tables and conversions work in
a similar way to that of DataStream tables.
    Here's a filtering example:
    ```
    val env = StreamExecutionEnvironment.getExecutionEnvironment
    val tEnv = TableEnvironment.getTableEnvironment(env)
    
    val dataStream = env.addSource(...)
    val t = dataStream.toTable(tEnv).as('a, 'b, 'c)
    tEnv.registerTable("MyTable", t)
    
    val sqlQuery = "SELECT STREAM * FROM MyTable WHERE a = 3"
    val result = tEnv.sql(sqlQuery).toDataStream[Row]
    ```


You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/vasia/flink stream-sql

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/flink/pull/1917.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 #1917
    
----
commit 6b747bd6902074d0475de9519c1c3bd693487eef
Author: vasia <vasia@apache.org>
Date:   2016-04-15T11:35:24Z

    [FLINK-3727] Add support for embedded streaming SQL (projection, filter, union)
    
    - add methods to register DataStreams
    - add sql translation method in StreamTableEnvironment
    - add a custom rule to convert to streamable table
    - add docs for streaming table and sql

----


> Add support for embedded streaming SQL (projection, filter, union)
> ------------------------------------------------------------------
>
>                 Key: FLINK-3727
>                 URL: https://issues.apache.org/jira/browse/FLINK-3727
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Table API
>    Affects Versions: 1.1.0
>            Reporter: Vasia Kalavri
>            Assignee: Vasia Kalavri
>
> Similar to the support for SQL embedded in batch Table API programs, this issue tracks
the support for SQL embedded in stream Table API programs. The only currently supported operations
on streaming Tables are projection, filtering, and union.



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