kasakrisz opened a new pull request #2872:
URL: https://github.com/apache/hive/pull/2872
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### What changes were proposed in this pull request?
When generating incremental rebuild plan for MVs having aggregate and delete
operations in any source tables check if the view definition contains any
`count` aggregate function which has argument. If it has add expression to
check if that argument is `null` or not.
### Why are the changes needed?
Records with `null` values should not be counted in the final aggregation.
### Does this PR introduce _any_ user-facing change?
Yes. This patch fixes a data correctness issue.
### How was this patch tested?
```
mvn test -Dtest.output.overwrite -DskipSparkTests
-Dtest=TestMiniLlapLocalCliDriver -Dqfile=materialized_view_create_rewrite_6.q
-pl itests/qtest -Pitests
```
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