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From "Jesus Camacho Rodriguez (Jira)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-22816) QueryCache: Queries using views can have them cached after CTE expansion
Date Tue, 04 Feb 2020 01:46:00 GMT

    [ https://issues.apache.org/jira/browse/HIVE-22816?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17029427#comment-17029427
] 

Jesus Camacho Rodriguez commented on HIVE-22816:
------------------------------------------------

+1

> QueryCache: Queries using views can have them cached after CTE expansion
> ------------------------------------------------------------------------
>
>                 Key: HIVE-22816
>                 URL: https://issues.apache.org/jira/browse/HIVE-22816
>             Project: Hive
>          Issue Type: Bug
>          Components: Query Processor
>            Reporter: Gopal Vijayaraghavan
>            Assignee: Gopal Vijayaraghavan
>            Priority: Major
>         Attachments: HIVE-22816.1.patch
>
>
> {code}
> create view ss_null as select * from store_Sales where ss_Sold_date_sk is null;
> select count(ss_ticket_number) from ss_null;
> with ss_null_cte as 
> (select * from store_Sales where ss_Sold_date_sk is null)
> select count(ss_ticket_number) from ss_null_cte;
> {code}
> Are treated differently by the query cache, however their execution is identical.
> CBO rewrites the view query into AST form as follows
> {code}
> SELECT COUNT(`ss_ticket_number`) AS `$f0`
> FROM `tpcds_bin_partitioned_acid_orc_10000`.`store_sales`
> WHERE `ss_sold_date_sk` IS NULL
> {code}
> But retains the write-entity for the VIRTUAL_VIEW for Ranger authorization 
> {code}
> 0: jdbc:hive2://localhost:10013> explain dependency select count(distinct ss_ticket_number)
from ss_null;
> +----------------------------------------------------+
> |                      Explain                       |
> +----------------------------------------------------+
> | {"input_tables":[{"tablename":"tpcds_bin_partitioned_acid_orc_10000@ss_null","tabletype":"VIRTUAL_VIEW"},{"tablename":"tpcds_bin_partitioned_acid_orc_10000@store_sales","tabletype":"MANAGED_TABLE","tableParents":"[tpcds_bin_partitioned_acid_orc_10000@ss_null]"}],"input_partitions":[{"partitionName":"tpcds_bin_partitioned_acid_orc_10000@store_sales@ss_sold_date_sk=__HIVE_DEFAULT_PARTITION__"}]}
|
> +----------------------------------------------------+
> {code}
> Causing Query cache to print out
> {code}
> parse.CalcitePlanner: Not eligible for results caching - query contains non-transactional
tables [ss_null]
> {code}



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