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109 lines
4.2 KiB
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109 lines
4.2 KiB
ReStructuredText
.. _tablespace_dialog:
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**************************
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`Tablespace Dialog`:index:
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**************************
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Use The *Tablespace* dialog to define a tablespace. A tablespace allows
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superusers to define an alternative location on the file system where the data
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files containing database objects (such as tables and indexes) reside.
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Tablespaces are only supported on systems that support symbolic links. Note that
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a tablespace cannot be used independently of the cluster in which it is defined.
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The *Tablespace* dialog organizes the definition of a tablespace through the
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following tabs: *General*, *Definition*, *Parameters*, and *Security*. The *SQL*
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tab displays the SQL code generated by dialog selections.
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.. image:: images/tablespace_general.png
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:alt: Tablespace dialog general tab
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:align: center
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* Use the *Name* field to identify the tablespace with a descriptive name. The
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name cannot begin with pg\_; these names are reserved for system tablespaces.
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* Select the owner of the tablespace from the drop-down listbox in the *Owner*
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field.
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* Store notes about the tablespace in the *Comment* field.
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Click the *Definition* tab to continue.
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.. image:: images/tablespace_definition.png
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:alt: Tablespace dialog definition tab
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:align: center
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* Use the *Location* field to specify an absolute path to a directory that will
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contain the tablespace.
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Click the *Parameters* tab to continue.
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.. image:: images/tablespace_parameters.png
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:alt: Tablespace dialog parameters tab
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:align: center
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Use the *Parameters* tab to set parameters for the tablespace. Click the *Add*
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icon (+) to add a row to the table below.
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* Use the drop-down listbox next to *Name* to select a parameter.
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* Use the *Value* field to set a value for the parameter.
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Click the *Add* icon (+) to specify each additional parameter; to discard a
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parameter, click the trash icon to the left of the row and confirm deletion in
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the *Delete Row* dialog.
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Click the *Security* tab to continue.
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.. image:: images/tablespace_security.png
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:alt: Tablespace dialog security tab
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:align: center
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Use the *Security* tab to assign privileges and define security labels for the
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tablespace.
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Use the *Privileges* panel to assign security privileges. Click the *Add* icon
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(+) to 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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* The current user, who is the default grantor for granting the privilege, is displayed in the *Grantor* 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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Click the *Add* icon to assign additional sets of privileges; to discard a
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privilege, click the trash icon to the left of the row and confirm deletion in
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the *Delete Row* popup.
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Use the *Security Labels* panel to define security labels applied to the
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tablespace. Click the *Add* icon (+) to add each security label selection:
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* Specify a security label provider in the *Provider* field. The named provider
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must be loaded and must consent to the proposed labeling operation.
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* Specify a a security label in the *Security Label* field. The meaning of a
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given label is at the discretion of the label provider. PostgreSQL places no
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restrictions on whether or how a label provider must interpret security
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labels; it merely provides a mechanism for storing them.
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To discard a security label, click the trash icon to the left of the row and
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confirm deletion in the *Delete Row* popup.
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Click the *SQL* tab to continue.
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Your entries in the *Tablespace* dialog generate a SQL command (see an example
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below). Use the *SQL* tab for review; revisit or switch tabs to make any changes
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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 *Tablespace* dialog:
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.. image:: images/tablespace_sql.png
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:alt: Tablespace dialog sql tab
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:align: center
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The example shown demonstrates creating a tablespace named *space_01*. It has a
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*random_page_cost* value equal to *1*.
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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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