Github user DmytroShkvyra commented on a diff in the pull request:
https://github.com/apache/flink/pull/3673#discussion_r114790408
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/codegen/generated.scala
---
@@ -35,7 +35,11 @@ case class GeneratedExpression(
resultTerm: String,
nullTerm: String,
code: String,
- resultType: TypeInformation[_])
+ resultType: TypeInformation[_]) {
+
+ var leftNullTerm: String = _
--- End diff --
@fhueske It doesn't work because `${codeGenerator.input1Term}` is Row
` @Override
public void join(Object _in1, Object _in2,
org.apache.flink.util.Collector c) throws Exception {
org.apache.flink.types.Row in1 = (org.apache.flink.types.Row)
_in1;
org.apache.flink.types.Row in2 = (org.apache.flink.types.Row)
_in2;`
But I need know which field in join expression is null
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