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If you often need to use a table from HCatalog, a table and storage management layer for Hadoop, then you may want to centralize the connection information to a given HCatalog and the table schema details in the Metadata folder in the Repository tree view.
Launch the HortonWorks Hadoop distribution you need to use and ensure that you have the proper access permission to that distribution and its HCatalog.
Create the connection to that Hadoop distribution from the Hadoop cluster node. For further information, see Centralizing a Hadoop connection.