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https://issues.apache.org/jira/browse/HIVE-24274?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated HIVE-24274:
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Labels: pull-request-available (was: )
> Implement Query Text based MaterializedView rewrite
> ---------------------------------------------------
>
> Key: HIVE-24274
> URL: https://issues.apache.org/jira/browse/HIVE-24274
> Project: Hive
> Issue Type: Improvement
> Reporter: Krisztian Kasa
> Assignee: Krisztian Kasa
> Priority: Major
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Besides the way queries are currently rewritten to use materialized views in
> Hive this project provides an alternative:
> Compare the query text with the materialized views query text stored. If we
> found a match the original query's logical plan can be replaced by a scan on
> the materialized view.
> - Only materialized views which are enabled to rewrite can participate
> - Use existing *HiveMaterializedViewsRegistry* through *Hive* object by
> adding a lookup method by query text.
> - There might be more than one materialized views which have the same query
> text. In this case chose the first valid one.
> - Validation can be done by calling
> *Hive.validateMaterializedViewsFromRegistry()*
> - The scope of this first patch is rewriting queries which entire text can be
> matched only.
> - Use the expanded query text (fully qualified column and table names) for
> comparing
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