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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 <va...@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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