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https://issues.apache.org/jira/browse/HIVE-11752?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jesus Camacho Rodriguez updated HIVE-11752:
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    Attachment: HIVE-11752.03.patch

> Pre-materializing complex CTE queries
> -------------------------------------
>
>                 Key: HIVE-11752
>                 URL: https://issues.apache.org/jira/browse/HIVE-11752
>             Project: Hive
>          Issue Type: Improvement
>          Components: Query Processor
>            Reporter: Navis
>            Assignee: Navis
>            Priority: Minor
>         Attachments: HIVE-11752.03.patch, HIVE-11752.1.patch.txt, 
> HIVE-11752.2.patch.txt
>
>
> Currently, hive regards CTE clauses as a simple alias to the query block, 
> which makes redundant works if it's used multiple times in a query. This 
> introduces a reference threshold for pre-materializing the CTE clause as a 
> volatile table (which is not exists in any form of metastore and just 
> accessible from QB).



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