[SPARK-9927][SQL]Revert 8049 since it's pushing wrong filter down

[yjshen]

I made a mistake in #8049 by casting literal value to attribute's data type, which would cause simply truncate the literal value and push a wrong filter down.

JIRA: https://issues.apache.org/jira/browse/SPARK-9927

[liancheng]

@yjshen Could you provide a snippet that reproduces the error you mentioned?

[yjshen]

select * from inttypes where A > 2147483648, it would produce GreaterThan(Cast(A, LongType), Literal(2147483648L, LongType), in #8049 I just cast the long value to IntType, therefore the pushed down filter became A > -2147483648.

[SparkQA]

Test build #40723 has finished for PR 8157 at commit db15678.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds the following public classes (experimental):
  • case class QRDecomposition[QType, RType](Q: QType, R: RType)

[liancheng]

@yjshen Thanks, I'm merging this to master and branch-1.5 and reopening SPARK-9182.

[yjshen]

@liancheng , I'm really sorry for my mistake.

[liancheng]

Nah, I suggested the wrong fix at the first place anyway :)