GitHub user cloud-fan opened a pull request:

    https://github.com/apache/spark/pull/15160

    [SPARK-17609][SQL] SessionCatalog.tableExists should not check temp view

    ## What changes were proposed in this pull request?
    
    After #15054 , there is no place in Spark SQL that need 
`SessionCatalog.tableExists` to check temp views, so this PR makes 
`SessionCatalog.tableExists` only check permanent table/view and removes some 
hacks.
    
    This PR also improves the `getTempViewOrPermanentTableMetadata` that is 
introduced in  #15054 , to make the code simpler.
    
    ## How was this patch tested?
    
    existing tests


You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/cloud-fan/spark exists

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/spark/pull/15160.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #15160
    
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commit d00860fe3cf6beeef1e431e02fb126177bc46415
Author: Wenchen Fan <wenc...@databricks.com>
Date:   2016-09-20T13:16:42Z

    SessionCatalog.tableExists should not check temp view

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