Matthew Jacobs 65353fd9fb IMPALA-598: Order by behavior for NULLs should be revisited ...

This change modifies that behavior of NULL ordering such that nulls always
compare greater than other values, but "nulls first" or "nulls last" can be used
to explicitly specify if nulls should be sorted first or last regardless of the
asc/desc.

Change-Id: I92feda1e7f42249de4009afd39f8395a0a32a2f8
Reviewed-on: http://gerrit.ent.cloudera.com:8080/812
Reviewed-by: Marcel Kornacker <marcel@cloudera.com>
Reviewed-by: Matthew Jacobs <mj@cloudera.com>
Tested-by: Matthew Jacobs <mj@cloudera.com>

2014-01-08 10:53:48 -08:00

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