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Posted to gitbox@hive.apache.org by GitBox <gi...@apache.org> on 2021/02/10 08:00:36 UTC
[GitHub] [hive] kasakrisz opened a new pull request #1966: HIVE-24763: Incremental rebuild of Materialized view fails
kasakrisz opened a new pull request #1966:
URL: https://github.com/apache/hive/pull/1966
### What changes were proposed in this pull request?
During incremental materialized view rebuild CBO plain is transformed from an insert over write plan to a merge into plan if MV definition contains aggregate. During this transformation the union operator is replaced with a right outer join of the union branches and the join keys are coming from the aggregate keys. When building the join expressions the key equality checks are concatenated by `AND` operators. Building of `AND` expressions are throws AssertionError when only one operand/aggregate key/join key exists.
### Why are the changes needed?
Check the number of expressions before creating the `AND` expression and return use expression itself as the root of the join expression if only one expression exists.
### Does this PR introduce _any_ user-facing change?
No.
### How was this patch tested?
```
mvn test -Dtest.output.overwrite -DskipSparkTests -Dtest=TestMiniLlapLocalCliDriver -Dqfile=materialized_view_create_rewrite_one_key_gby.q,materialized_view_create_rewrite_4.q -pl itests/qtest -Pitests
```
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[GitHub] [hive] kasakrisz merged pull request #1966: HIVE-24763: Incremental rebuild of Materialized view fails
Posted by GitBox <gi...@apache.org>.
kasakrisz merged pull request #1966:
URL: https://github.com/apache/hive/pull/1966
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