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