Github user YanjieGao commented on the pull request:
https://github.com/apache/spark/pull/1151#issuecomment-46814099
Hi all, I have finished this Subtract Operator.
These code can run and pass compile.These code need to be reviewed thanks
a lot!
(1)because there is a conflict name in SqlParser , so change the name to
Except in that file
(2)I try test suite the result is strange and i try some other test suite
found the cause may
the rdd.Subtract operator cause .I think maybe that operator has a bug .
You can use this case
checkAnswer(
sql("SELECT * FROM lowerCaseData EXCEPT SELECT * FROM upperCaseData
"),
(1, "a") ::
(2, "b") ::
(3, "c") ::
(4, "d") :: Nil)
If you debug you will find that all rdd become the same row .
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