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https://issues.apache.org/jira/browse/HIVE-9897?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14544680#comment-14544680
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Pengcheng Xiong commented on HIVE-9897:
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I agree with [~hagleitn] and [~jpullokkaran] that this is a bug. We will
address this together in HIVE-10698.
> Issue a warning when using an existing table/view name as an alias in a with
> statement.
> ----------------------------------------------------------------------------------------
>
> Key: HIVE-9897
> URL: https://issues.apache.org/jira/browse/HIVE-9897
> Project: Hive
> Issue Type: Improvement
> Components: Hive
> Affects Versions: 0.13.1
> Environment: cdh5.3.0
> Reporter: Mario Konschake
> Priority: Minor
>
> Consider the following query:
> {code:sql}
> WITH
> table_a AS (
> SELECT
> 'johndoe' AS name
> FROM
> my_table
> )
> SELECT
> DISTINCT name
> FROM
> table_a;
> {code}
> Observation:
> If a table or a view with name `table_a` exists it is used instead of the one
> defined in the WITH statement.
> Expectation:
> As the expectation is ambiguous (using the alias in the WITH statement vs.
> using the existing table) issuing a warning when using a existing name in a
> WITH statement is recommended.
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