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