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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
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Ravindra Pesala commented on SPARK-3298:
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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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