Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/3829#discussion_r136104550
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/api/BatchTableEnvironment.scala
---
@@ -106,6 +106,43 @@ abstract class BatchTableEnvironment(
}
/**
+ * Registers an external [[TableSink]] in this [[TableEnvironment]]'s
catalog.
+ * Registered sink tables can be referenced in SQL DML clause.
+ *
+ * Examples:
+ *
+ * - predefine a table sink with schema
--- End diff --
I think we should not require users to correctly configure the field names
and types of the table sink before registering it.
We can configure it ourselves:
```
val tableSink: TableSink = ...
val fieldNames: Array[String] = Array("a", "b", "c")
val fieldTypes: Array[TypeInformation[_]] = Array(Types.INT, Types.LONG,
Types.STRING)
tableEnv.registerTableSink("example_sink_table", fieldNames, fieldTypes,
tableSink)
```
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