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98 lines
3.7 KiB
ReStructuredText
98 lines
3.7 KiB
ReStructuredText
.. _foreign_server_dialog:
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******************************
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`Foreign Server Dialog`:index:
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******************************
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Use the *Foreign Server* dialog to create a foreign server. A foreign server
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typically encapsulates connection information that a foreign-data wrapper uses
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to access an external data resource. Each foreign data wrapper may connect to a
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different foreign server; in the *pgAdmin* tree control, expand the node of the
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applicable foreign data wrapper to launch the *Foreign Server* dialog.
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The *Foreign Server* dialog organizes the development of a foreign server
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through the following dialog tabs: *General*, *Definition*, *Options*, and
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*Security*. The *SQL* tab displays the SQL code generated by dialog selections.
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.. image:: images/foreign_server_general.png
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:alt: Foreign server dialog general tab
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:align: center
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Use the fields in the *General* tab to identify the foreign server:
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* Use the *Name* field to add a descriptive name for the foreign server. The
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name will be displayed in the *pgAdmin* tree control. It must be unique within
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the database.
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* Use the drop-down listbox next to *Owner* to select a role.
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* Store notes about the foreign server in the *Comment* field.
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Click the *Definition* tab to continue.
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.. image:: images/foreign_server_definition.png
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:alt: Foreign server dialog definition tab
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:align: center
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Use the fields in the *Definition* tab to set parameters:
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* Use the *Type* field to specify a server type.
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* Use the *Version* field to specify a server version.
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Click the *Options* tab to continue.
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.. image:: images/foreign_server_options.png
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:alt: Foreign server dialog options tab
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:align: center
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Use the fields in the *Options* tab to specify options. Click the *Add* button
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to create an option clause for the foreign server.
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* Specify the option name in the *Option* field.
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* Provide a corresponding value in the *Value* field.
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Click *Add* to create each additional clause; to discard an option, click the
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trash icon to the left of the row and confirm deletion in the *Delete Row*
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popup.
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Click the *Security* tab to continue.
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.. image:: images/foreign_server_security.png
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:alt: Foreign server dialog security tab
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:align: center
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Use the *Security* tab to assign security privileges to the foreign server.
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Click *Add* before you assign a set of privileges.
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* Select the name of the role from the drop-down listbox in the *Grantee* field.
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* Click inside the *Privileges* field. Check the boxes to the left of one or
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more privileges to grant the selected privileges to the specified user.
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* The current user, who is the default grantor for granting the privilege, is displayed in the *Grantor* field.
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Click *Add* to assign a new set of privileges; to discard a privilege, click the
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trash icon to the left of the row and confirm deletion in the *Delete Row*
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dialog.
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Click the *SQL* tab to continue.
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Your entries in the *Foreign Server* dialog generate a SQL command (see an
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example below). Use the *SQL* tab for review; revisit or switch tabs to make
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any changes to the SQL command.
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Example
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*******
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The following is an example of the sql command generated by user selections in
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the *Foreign Server* dialog:
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.. image:: images/foreign_server_sql.png
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:alt: Foreign server dialog sql tab
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:align: center
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The example shown demonstrates creating a foreign server for the foreign data
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wrapper *hdfs_fdw*. It has the name *hdfs_server*; its type is *hiveserver2*.
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Options for the foreign server include a host and a port.
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* Click the *Info* button (i) to access online help.
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* Click the *Save* button to save work.
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* Click the *Close* button to exit without saving work.
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* Click the *Reset* button to restore configuration parameters.
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