[jira] [Created] (HIVE-22816) QueryCache: Queries using views can have them cached after CTE expansion

[Gopal Vijayaraghavan (Jira)]

Gopal Vijayaraghavan created HIVE-22816:
-------------------------------------------

             Summary: 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


{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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