Github user wuchong commented on the issue:

    https://github.com/apache/flink/pull/2078
  
    Hi @gallenvara , I debug the  `IndexOutOfBoundsException` exception of  
`testJoinWithDisjunctivePred`, and find this line [L526 in 
CodeGenerator](https://github.com/apache/flink/blob/master/flink-libraries/flink-table/src/main/scala/org/apache/flink/api/table/codegen/CodeGenerator.scala#L526).
  This is the reason for the test failure.   Because  `==` in scala is 
`equals`,when we visit inputRef of 'd, the input1 and input2 have the same 
field types ([Int, Long, String]). Here we will get the wrong index(3) which 
cause IOOB exception, but we want to get the index(0). 
    
    We just need to modify L526 to `val index = if (input._2 == input1Term) {` 
will fix this problem.


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