flink-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From vasia <...@git.apache.org>
Subject [GitHub] flink pull request: [FLINK-3727] Embedded streaming SQL projection...
Date Wed, 20 Apr 2016 16:30:37 GMT
GitHub user vasia opened a pull request:


    [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:


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


If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at infrastructure@apache.org or file a JIRA ticket
with INFRA.

View raw message