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https://issues.apache.org/jira/browse/HIVE-25656?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Krisztian Kasa resolved HIVE-25656.
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Resolution: Fixed
Pushed to master. Thanks [~kgyrtkirk] and [~scarlin] for review.
> Get materialized view state based on number of affected rows of 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
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.0.0
>
> Time Spent: 2h 40m
> Remaining Estimate: 0h
>
> 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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