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<section id="extension-dialog">
<span id="id1"></span><h1><span class="target" id="index-0"></span>Extension Dialog<a class="headerlink" href="#extension-dialog" title="Link to this heading">¶</a></h1>
<p>Use the <em>Extension</em> dialog to install a new extension into the current database.
An extension is a collection of SQL objects that add targeted functionality to
your Postgres installation. The <em>Extension</em> dialog adds the functionality of
an extension to the current database only; you must register the extension in
each database that use the extension. Before you load an extension into a
database, you should confirm that any pre-requisite files are installed.</p>
<p>The <em>Extension</em> dialog allows you to implement options of the CREATE EXTENSION
command through the following dialog tabs: <em>General</em> and <em>Definition</em>. The <em>SQL</em>
tab displays the SQL code generated by dialog selections.</p>
<img alt="Extension dialog general tab" class="align-center" src="_images/extension_general.png" />
<p>Use the fields in the <em>General</em> tab to identify an extension:</p>
<ul class="simple">
<li><p>Use the drop-down listbox in the <em>Name</em> field to select the extension. Each
extension must have a unique name.</p></li>
<li><p>Move the switch next to <em>Cascade?</em> towards right position to automatically
install any extensions that this extension depends on that are not already
installed.</p></li>
<li><p>Store notes about the extension in the <em>Comment</em> field.</p></li>
</ul>
<p>Click the <em>Definition</em> tab to continue.</p>
<img alt="Extension dialog definition tab" class="align-center" src="_images/extension_definition.png" />
<p>Use the <em>Definition</em> tab to select the <em>Schema</em> and <em>Version</em>:</p>
<ul class="simple">
<li><p>Use the drop-down listbox next to <em>Schema</em> to select the name of the schema
in which to install the extension’s objects.</p></li>
<li><p>Use the drop-down listbox next to <em>Version</em> to select the version of the
extension to install.</p></li>
</ul>
<p>Click the <em>SQL</em> tab to continue.</p>
<p>Your entries in the <em>Extension</em> dialog generate a SQL command (see an example
below). Use the <em>SQL</em> tab for review; revisit or switch tabs to make any changes
to the SQL command.</p>
<section id="example">
<h2>Example<a class="headerlink" href="#example" title="Link to this heading">¶</a></h2>
<p>The following is an example of the sql command generated by user selections in
the <em>Extension</em> dialog:</p>
<img alt="Extension dialog sql tab" class="align-center" src="_images/extension_sql.png" />
<p>The command creates the <em>adminpack</em> extension in the <em>public</em> schema. It is
version <em>2.0</em> of <em>adminpack</em>.</p>
<ul class="simple">
<li><p>Click the <em>Info</em> button (i) to access online help.</p></li>
<li><p>Click the <em>Save</em> button to save work.</p></li>
<li><p>Click the <em>Close</em> button to exit without saving work.</p></li>
<li><p>Click the <em>Reset</em> button to restore configuration parameters.</p></li>
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