[jira] [Created] (FLINK-6442) Extend TableAPI Support Sink Table Registration and ‘insert into’ Clause in SQL

["lincoln.lee (JIRA)" <ji...@apache.org>]

lincoln.lee created FLINK-6442:
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             Summary: Extend TableAPI Support Sink Table Registration and ‘insert into’ Clause in SQL
                 Key: FLINK-6442
                 URL: https://issues.apache.org/jira/browse/FLINK-6442
             Project: Flink
          Issue Type: New Feature
          Components: Table API & SQL
            Reporter: lincoln.lee
            Assignee: lincoln.lee
            Priority: Minor


Currently in TableAPI  there’s only registration method for source table,  when we use SQL writing a streaming job, we should add additional part for the sink, like TableAPI does:
{code}
val sqlQuery = "SELECT * FROM MyTable WHERE _1 = 3"

val t = StreamTestData.getSmall3TupleDataStream(env)
tEnv.registerDataStream("MyTable", t)

// one way: invoke tableAPI’s writeToSink method directly
val result = tEnv.sql(sqlQuery)
result.writeToSink(new YourStreamSink)

// another way: convert to datastream first and then invoke addSink 
val result = tEnv.sql(sqlQuery).toDataStream[Row]
result.addSink(new StreamITCase.StringSink)
{code}

From the api we can see the sink table always be a derived table because its 'schema' is inferred from the result type of upstream query.
Compare to traditional RDBMS which support DML syntax, a query with a target output could be written like this:
{code}
insert into table target_table_name
[(column_name [ ,...n ])]
query
{code}

design doc: https://goo.gl/n3phK5




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