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Date: Fri, 19 Sep 2014 07:12:34 +0000 (UTC)
From: "Ravindra Pesala (JIRA)" <jira@apache.org>
To: issues@spark.apache.org
Message-ID: <JIRA.12737744.1409298840000.73761.1411110754244@Atlassian.JIRA>
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Subject: [jira] [Commented] (SPARK-3298) [SQL] registerAsTable /
 registerTempTable overwrites old tables
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    [ https://issues.apache.org/jira/browse/SPARK-3298?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14140124#comment-14140124 ] 

Ravindra Pesala commented on SPARK-3298:
----------------------------------------

I guess, we should add some API like *SqlContext.isTableExists(tableName)* to check whether the table already exists or not. So by using this API user can check the table existence  and then register the table.
The current API *SqlContext.table(tableName)*  throws exception if the table is not present,so we cannot use it for this purpose. Please comment on it.


> [SQL] registerAsTable / registerTempTable overwrites old tables
> ---------------------------------------------------------------
>
>                 Key: SPARK-3298
>                 URL: https://issues.apache.org/jira/browse/SPARK-3298
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 1.0.2
>            Reporter: Evan Chan
>            Priority: Minor
>              Labels: newbie
>
> At least in Spark 1.0.2,  calling registerAsTable("a") when "a" had been registered before does not cause an error.  However, there is no way to access the old table, even though it may be cached and taking up space.
> How about at least throwing an error?


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