Thanks for all the comments, and discussions with Luke. The DSL interface is updated to convert SQL queries into a PTranform, to be compatible with Beam concept that PTransform is the building block for composing "functions".
Check the doc for more details and feel free to leave a comment. Mingmin On Sun, May 14, 2017 at 11:28 AM, Davor Bonaci <da...@apache.org> wrote: > Thanks Mingmin; I left a few comments in the document. > > On Sat, May 13, 2017 at 8:20 AM, Mingmin Xu <mingm...@gmail.com> wrote: > > > It's part of the ongoing SQL feature, and available together with SQL. > > will update it. > > > > Mingmin > > > > > On May 13, 2017, at 5:20 AM, Ted Yu <yuzhih...@gmail.com> wrote: > > > > > > Can you fill out the Transition Plan ? > > > > > > Thanks > > > > > >> On Fri, May 12, 2017 at 10:49 PM, Mingmin Xu <mingm...@gmail.com> > > wrote: > > >> > > >> Hi all, > > >> > > >> As you may know, we're working on BeamSQL to execute SQL queries as a > > Beam > > >> pipeline. This is a valuable feature, not only shipped as a packaged > > CLI, > > >> but also as part of the SDK to assemble a pipeline. > > >> > > >> I prepare a document[1] to list the high level APIs, to show how SQL > > >> queries can be added in a pipeline. Below is a snippet of pseudocode > > for a > > >> quick reference: > > >> > > >> PipelineOptions options = PipelineOptionsFactory... > > >> Pipeline pipeline = Pipeline.create(options); > > >> > > >> //prepare environment of BeamSQL > > >> BeamSQLEnvironment sqlEnv = BeamSQLEnvironment.create(pipeline); > > >> //register table metadata > > >> sqlEnv.addTableMetadata(String tableName, BeamSqlTable tableMetadata); > > >> //register UDF > > >> > > >> sqlEnv.registerUDF(String functionName, Method udfMethod); > > >> > > >> > > >> //explain a SQL statement, SELECT only, and return as a PCollection; > > >> PCollection<BeamSQLRow> phase1Stream = sqlEnv.explainSQL(String > > >> sqlStatement); > > >> //A PCollection explained by BeamSQL can be converted into a table, > and > > >> apply queries on it; > > >> sqlEnv.registerPCollectionAsTable(String tableName, phase1Stream); > > >> > > >> //apply more queries, even based on phase1Stream > > >> > > >> pipeline.run().waitUntilFinish(); > > >> > > >> Any feedback is very welcome! > > >> > > >> [1] > > >> https://docs.google.com/document/d/1uWXL_ > yF3UUO5GfCxbL6kWsmC8xCWfICU3Rw > > >> iQKsk7Mk/edit?usp=sharing > > >> > > >> -- > > >> ---- > > >> Mingmin > > >> > > > -- ---- Mingmin
