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From "Hyukjin Kwon (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-19115) SparkSQL unsupported the command " create external table if not exist new_tbl like old_tbl"
Date Wed, 11 Jan 2017 00:39:58 GMT

    [ https://issues.apache.org/jira/browse/SPARK-19115?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15816679#comment-15816679
] 

Hyukjin Kwon commented on SPARK-19115:
--------------------------------------

Hi all, I just wonder if it should be resolved as {{Won't Fix}}.

> SparkSQL unsupported the command " create external table if not exist  new_tbl like old_tbl"
> --------------------------------------------------------------------------------------------
>
>                 Key: SPARK-19115
>                 URL: https://issues.apache.org/jira/browse/SPARK-19115
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 2.0.1
>         Environment: spark2.0.1 hive1.2.1
>            Reporter: Xiaochen Ouyang
>
> spark2.0.1 unsupported the command " create external table if not exist  new_tbl like
old_tbl"
> we tried to modify the  sqlbase.g4 file,change
> "    | CREATE TABLE (IF NOT EXISTS)? target=tableIdentifier
>         LIKE source=tableIdentifier                                    #createTableLike"
> to
> "    | CREATE EXTERNAL? TABLE (IF NOT EXISTS)? target=tableIdentifier
>         LIKE source=tableIdentifier                                    #createTableLike"
> and then we compiled spark and replaced the jar "spark-catalyst-2.0.1.jar" ,after that,we
found we can run command "create external table if not exist  new_tbl like old_tbl" successfully,unfortunately
we found the generated table's type is  MANAGED_TABLE other than  EXTERNAL_TABLE in metastore
database .



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