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From "Takeshi Yamamuro (Jira)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-29660) Dropping columns and changing column names/types are prohibited in VIEW definition
Date Thu, 31 Oct 2019 00:17:00 GMT

    [ https://issues.apache.org/jira/browse/SPARK-29660?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16963533#comment-16963533
] 

Takeshi Yamamuro commented on SPARK-29660:
------------------------------------------

I'm not sure that we need to do something about this. See: https://github.com/apache/spark/pull/26290#discussion_r340487877

> Dropping columns and changing column names/types are prohibited in VIEW definition
> ----------------------------------------------------------------------------------
>
>                 Key: SPARK-29660
>                 URL: https://issues.apache.org/jira/browse/SPARK-29660
>             Project: Spark
>          Issue Type: Sub-task
>          Components: SQL
>    Affects Versions: 3.0.0
>            Reporter: Takeshi Yamamuro
>            Priority: Major
>
> In PostgreSQL, the three DDL syntaxes for VIEW cannot be accepted;
> {code:java}
> -- should fail
> CREATE OR REPLACE VIEW viewtest AS
> 	SELECT a FROM viewtest_tbl WHERE a <> 20;
> ERROR:  cannot drop columns from view
> -- should fail
> CREATE OR REPLACE VIEW viewtest AS
> 	SELECT 1, * FROM viewtest_tbl;
> ERROR:  cannot change name of view column "a" to "?column?"
> -- should fail
> CREATE OR REPLACE VIEW viewtest AS
> 	SELECT a, b::numeric FROM viewtest_tbl;
> ERROR:  cannot change data type of view column "b" from integer to numeric
> {code}



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