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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2016/11/16 02:17:58 UTC
[jira] [Assigned] (SPARK-18465) Uncache Table shouldn't throw an
exception when table doesn't exist
[ https://issues.apache.org/jira/browse/SPARK-18465?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Apache Spark reassigned SPARK-18465:
------------------------------------
Assignee: Apache Spark
> Uncache Table shouldn't throw an exception when table doesn't exist
> -------------------------------------------------------------------
>
> Key: SPARK-18465
> URL: https://issues.apache.org/jira/browse/SPARK-18465
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Burak Yavuz
> Assignee: Apache Spark
>
> While this behavior is debatable, consider the following use case:
> {code}
> UNCACHE TABLE foo;
> CACHE TABLE foo AS
> SELECT * FROM bar
> {code}
> The command above fails the first time you run it. But I want to run the command above over and over again, and I don't want to change my code just for the first run of it.
> The issue is that subsequent `CACHE TABLE` commands do not overwrite the existing table.
> There are alternate solutions, e.g.
> 1.
> {code}
> UNCACHE TABLE IF EXISTS foo
> {code}
> 2.
> {code}
> CACHE AND REPLACE TABLE foo
> {code}
> Which will require additional work with the parser.
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