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https://issues.apache.org/jira/browse/SPARK-14014?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15210611#comment-15210611
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Apache Spark commented on SPARK-14014:
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User 'andrewor14' has created a pull request for this issue:
https://github.com/apache/spark/pull/11938
> Replace existing analysis.Catalog with SessionCatalog
> -----------------------------------------------------
>
> Key: SPARK-14014
> URL: https://issues.apache.org/jira/browse/SPARK-14014
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Reporter: Andrew Or
> Assignee: Andrew Or
>
> As of this moment, there exist many catalogs in Spark. For Spark 2.0, we will
> have two high level catalogs only: SessionCatalog and ExternalCatalog.
> SessionCatalog (implemented in SPARK-13923) keeps track of temporary
> functions and tables and delegates other operations to ExternalCatalog.
> At the same time, there's this legacy catalog called `analysis.Catalog` that
> also tracks temporary functions and tables. The goal is to get rid of this
> legacy catalog and replace it with SessionCatalog, which is the new thing.
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