Hi Fanbin,
I think you are mixing different APIs together. We have a Scala and Java
version of both DataStream and Table API. The error message indicates
that `toRetractStream` is called on a Java Table API class because it
returns org.apache.flink.api.java.tuple.Tuple2 but your sink is
implemented in Scala with Scala tuple syntax like `(Boolean, Row)`.
Make sure you are using `org.apache.flink.table.api.scala._` instead of
`org.apache.flink.table.api.java._`.
I hope this helps.
Regards,
Timo
On 15.12.19 03:25, Fanbin Bu wrote:
Hi
I have my sink defined as:
class MyAwesomeSink() extends RichSinkFunction[(Boolean, Row)] {
...
}
But compile complains when I use it like:
val sink = new MyAwesomeSink()
tableEnv.toRetractStream(queryResult, classOf[Row]).addSink(sink)
found : MyAwesomeSink
required:
org.apache.flink.streaming.api.functions.sink.SinkFunction[org.apache.flink.api.java.tuple.Tuple2[Boolean,org.apache.flink.types.Row]]
I'm using Flink 1.9 with blink.
I tried
import org.apache.flink.api.scala._
import org.apache.flink.streaming.api.scala._
and it doesn't work.
Any ideas?
Thanks,
Fanbin
