Krisztian Kasa created HIVE-27187:
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Summary: Incremental rebuild of materialized view stored by iceberg
Key: HIVE-27187
URL: https://issues.apache.org/jira/browse/HIVE-27187
Project: Hive
Issue Type: Improvement
Components: Iceberg integration, Materialized views
Reporter: Krisztian Kasa
Assignee: Krisztian Kasa
Currently incremental rebuild of materialized view stored by iceberg which
definition query contains aggregate operator is transformed to an insert
overwrite statement which contains a union operator if the source tables
contains insert operations only. One branch of the union scans the view the
other produces the delta.
This can be improved further: transform the statement to a multi insert
statement representing a merge statement to insert new aggregations and update
existing.
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