Krisztian Kasa created HIVE-25656:
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Summary: Get materialized view state based on number of affected
rows by transactions
Key: HIVE-25656
URL: https://issues.apache.org/jira/browse/HIVE-25656
Project: Hive
Issue Type: Improvement
Components: Materialized views, Transactions
Reporter: Krisztian Kasa
Assignee: Krisztian Kasa
Fix For: 4.0.0
To enable the faster incremental rebuild of materialized views presence of
update/delete operations on the source tables of the view since the last
rebuild must be checked. Based on the outcome different plan is generated for
scenarios in presence of update/delete and insert only operations.
Currently this is done by querying the COMPLETED_TXN_COMPONENTS table however
the records from this table is cleaned when MV source tables are compacted.
This reduces the chances of incremental MV rebuild.
The goal of this patch is to find an alternative way to store and retrieve this
information.
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