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From "Aman Omer (Jira)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-29630) Not allowed to create a permanent view by referencing a temporary view in EXISTS
Date Tue, 29 Oct 2019 07:43:00 GMT

    [ https://issues.apache.org/jira/browse/SPARK-29630?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16961765#comment-16961765
] 

Aman Omer commented on SPARK-29630:
-----------------------------------

[~maropu] I think when we project some constant in subquery, Spark will not link subquery's
table/view. Hence table _v8_temp_ is not dependent on _temp_table_.

Please check the output for following query.

$ CREATE VIEW v8_temp AS SELECT * FROM base_table WHERE EXISTS (SELECT * FROM temp_table);

> Not allowed to create a permanent view by referencing a temporary view in EXISTS
> --------------------------------------------------------------------------------
>
>                 Key: SPARK-29630
>                 URL: https://issues.apache.org/jira/browse/SPARK-29630
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 3.0.0
>            Reporter: Takeshi Yamamuro
>            Priority: Major
>
> {code}
> // In the master, the query below fails
> $ CREATE VIEW v7_temp AS SELECT t1.id, t2.a FROM base_table t1, (SELECT * FROM temp_table)
t2;
> org.apache.spark.sql.AnalysisException
> Not allowed to create a permanent view `v7_temp` by referencing a temporary view `temp_table`;
> // In the master, the query below passed, but this should fail
> $ CREATE VIEW v8_temp AS SELECT * FROM base_table WHERE EXISTS (SELECT 1 FROM temp_table);
> Passed
> {code}



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