Github user XuMingmin closed the pull request at:
https://github.com/apache/beam/pull/3250
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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_yF3UUO5GfCxbL6kWsmC8xCWfICU3Rwi