GitHub user XuMingmin opened a pull request:
https://github.com/apache/beam/pull/3250
[Beam-2010] expose programming interface
It's the DSL implementation described in [Apache Beam: design of DSL SQL
interface](https://docs.google.com/document/d/1uWXL_yF3UUO5GfCxbL6kWsmC8xCWfICU3RwiQKsk7Mk/edit?usp=sharing).
It provides two methods `BeamSql.simpleQuery(...)` and `BeamSql.query(...)`
to integrate SQL in Beam pipeline, by converting it into a `PTransform`, refer
to `org.apache.beam.dsls.sql.example.BeamSqlExample` as a quick example.
Along with this DSL methods, some functions in the back-end are changed:
1. `BeamSqlRowCoder` is updated to have a input parameter
`BeamSQLRecordType`, to declare row format, and it cannot be registered during
initialization any more;
2. Interface in `BeamRelNode` is changed, to align with the goal,
converting into PTransform;
The methods for CLI client are marked as `Experimental` in `BeamSql`, the
difference is handled in `BeamIOSourceRel`, that whether an upstream
PCollection is there, or need to generate from `BaseBeamTable`;
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/XuMingmin/beam BEAM-2010
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/beam/pull/3250.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 #3250
commit 3f0c2c356a83163f165684e07b24bbcc9f759ab7
Author: mingmxu
Date: 2017-05-27T05:07:03Z
DSL interface for Beam 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 infrastruct...@apache.org or file a JIRA ticket
with INFRA.
---
