Abhishek Radhakrishnan 08851c0198
Preserve the null values for numeric type dimensions post-compaction. (#9622)
* Add selector null check to preserve null values as-is.

* Fix typo.

* add wrapping dimension selector test.

* Address review comments.

* nit: replace exception type.

* uh, float is indeed NOT a special case.
2020-04-08 18:56:06 -07:00
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