Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/2159#discussion_r68474570
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/api/table/codegen/CodeGenerator.scala
---
@@ -260,10 +260,14 @@ class CodeGenerator(
val input1AccessExprs = for (i <- 0 until input1.getArity)
yield generateInputAccess(input1, input1Term, i)
- val input2AccessExprs = input2 match {
- case Some(ti) => for (i <- 0 until ti.getArity)
- yield generateInputAccess(ti, input2Term, i)
- case None => Seq() // add nothing
+ val input2AccessExprs = if (input1.getArity < resultFieldNames.length)
{
--- End diff --
Can this change be reverted if we use cogroup and an optional converter
map? Or would you consider this as a bug fix?
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