forked from docs/doc-exports
Lu, Huayi
e6fa411af0
Reviewed-by: Pruthi, Vineet <vineet.pruthi@t-systems.com> Co-authored-by: Lu, Huayi <luhuayi@huawei.com> Co-committed-by: Lu, Huayi <luhuayi@huawei.com>
112 lines
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112 lines
21 KiB
HTML
<a name="EN-US_TOPIC_0000001233761887"></a><a name="EN-US_TOPIC_0000001233761887"></a>
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<h1 class="topictitle1">Deleting Resources</h1>
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<div id="body8662426"><p id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0102810711_p2052418104288">After completing operations in this tutorial, if you no longer need to use the resources created during the operations, you can delete them to avoid resource waste or quota occupation. The procedure is as follows:</p>
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<ol id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0102810711_ol128971048133114"><li id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0102810711_li589734811315"><a href="#EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0102810711_section436416582815">Deleting the Foreign Table and Target Table</a></li><li id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0102810711_li16598251203117"><a href="#EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0102810711_section12369357281">Deleting the Created Foreign Server</a></li><li id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0102810711_li583135413315"><a href="#EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0102810711_section12067301412">Deleting the Database and the User to Which the Database Belongs</a><p id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0102810711_p11521220143315">If you have performed steps in <a href="dws_04_0244.html#EN-US_TOPIC_0000001188323676__en-us_topic_0000001099130938_en-us_topic_0102810708_section590417587243">(Optional) Creating a User and a Database and Granting the User Foreign Table Permissions</a>, delete the database and the user to which the database belongs.</p>
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</li></ol>
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<div class="section" id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0102810711_section436416582815"><a name="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0102810711_section436416582815"></a><a name="en-us_topic_0000001145491107_en-us_topic_0102810711_section436416582815"></a><h4 class="sectiontitle">Deleting the Foreign Table and Target Table</h4><ol id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0102810711_ol667615462149"><li id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0102810711_li13105123015615"><span>(Optional) If you have performed steps in <a href="dws_04_0246.html#EN-US_TOPIC_0000001188642102__en-us_topic_0000001099130958_en-us_topic_0102810710_section152121815193012">Querying Data After Importing It</a>, run the following command to delete the target table:</span><p><div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0102810711_screen7106559710"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal">1</span></pre></div></td><td class="code"><div><pre><span></span><span class="k">DROP</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="n">product_info</span><span class="p">;</span>
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</pre></div></td></tr></table></div>
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</div>
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<p id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_p12372148392">If the following information is displayed, the table has been deleted.</p>
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<div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_screen9238614133913"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal">1</span></pre></div></td><td class="code"><div><pre><span></span><span class="k">DROP</span><span class="w"> </span><span class="k">TABLE</span>
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</pre></div></td></tr></table></div>
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</div>
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</p></li><li id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0102810711_li1678173713610"><span>Run the following statement to delete the foreign table:</span><p><div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0102810711_screen745418396710"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal">1</span></pre></div></td><td class="code"><div><pre><span></span><span class="k">DROP</span><span class="w"> </span><span class="k">FOREIGN</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="n">product_info_ext_obs</span><span class="p">;</span>
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</pre></div></td></tr></table></div>
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</div>
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<p id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_p1097283518394">If the following information is displayed, the table has been deleted.</p>
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<div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_screen13972183514391"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal">1</span></pre></div></td><td class="code"><div><pre><span></span><span class="k">DROP</span><span class="w"> </span><span class="k">FOREIGN</span><span class="w"> </span><span class="k">TABLE</span>
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</pre></div></td></tr></table></div>
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</div>
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</p></li></ol>
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</div>
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<div class="section" id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0102810711_section12369357281"><a name="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0102810711_section12369357281"></a><a name="en-us_topic_0000001145491107_en-us_topic_0102810711_section12369357281"></a><h4 class="sectiontitle">Deleting the Created Foreign Server</h4><ol id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0102810711_ol784216307425"><li id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0102810711_li124114291428"><span>Use the user who created the foreign server to connect to the database where the foreign server is located.</span><p><p id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_p35512614408">In this example, common user <strong id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_b842352706155616">dbuser</strong> is used to create the foreign server in <strong id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_b842352706155652">mydatabase</strong>. You need to connect to the database through the database client tool provided by <span id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_ph1692512422530">GaussDB(DWS)</span>. You can use the gsql client to log in to the database in either of the following ways:</p>
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<ul id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0102810711_ul1987102122918"><li id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0102810711_li286821192916">If you have logged in to the gsql client, run the following command to switch the database and user:<div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0102810711_screen78672118298"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal">1</span></pre></div></td><td class="code"><div><pre><span></span><span class="err">\</span><span class="k">c</span><span class="w"> </span><span class="n">mydatabase</span><span class="w"> </span><span class="n">dbuser</span><span class="p">;</span>
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</pre></div></td></tr></table></div>
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</div>
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<p id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0102810711_p393324232911">Enter the password as prompted.</p>
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</li><li id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0102810711_li28642119290">If you have logged in to the gsql client, you can run the <strong id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_b842352706114419">\q</strong> command to exit gsql, and run the following command to reconnect to it:<div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0102810711_screen186621132916"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal">1</span></pre></div></td><td class="code"><div><pre><span></span><span class="n">gsql</span><span class="w"> </span><span class="o">-</span><span class="n">d</span><span class="w"> </span><span class="n">mydatabase</span><span class="w"> </span><span class="o">-</span><span class="n">h</span><span class="w"> </span><span class="mi">192</span><span class="p">.</span><span class="mi">168</span><span class="p">.</span><span class="mi">2</span><span class="p">.</span><span class="mi">30</span><span class="w"> </span><span class="o">-</span><span class="n">U</span><span class="w"> </span><span class="n">dbuser</span><span class="w"> </span><span class="o">-</span><span class="n">p</span><span class="w"> </span><span class="mi">8000</span><span class="w"> </span><span class="o">-</span><span class="n">r</span>
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</pre></div></td></tr></table></div>
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</div>
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<p id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0102810711_p13245811296">Enter the password as prompted.</p>
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</li></ul>
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</p></li><li id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0102810711_li16842630124215"><span>Delete the created foreign server.</span><p><p id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0102810711_p96021924141313">Run the following command to delete the server. For details about the syntax, see DROP SERVER.</p>
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<div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0102810711_screen460292411138"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal">1</span></pre></div></td><td class="code"><div><pre><span></span><span class="k">DROP</span><span class="w"> </span><span class="n">SERVER</span><span class="w"> </span><span class="n">obs_server</span><span class="p">;</span>
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</pre></div></td></tr></table></div>
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</div>
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<p id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0102810711_p173913112813">The database is deleted if the following information is displayed:</p>
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<div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0102810711_screen194712517287"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal">1</span></pre></div></td><td class="code"><div><pre><span></span><span class="k">DROP</span><span class="w"> </span><span class="n">SERVER</span>
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</pre></div></td></tr></table></div>
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</div>
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<p id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0102810711_p2029034143110">View the foreign server.</p>
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<div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0102810711_screen1062415817279"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal">1</span></pre></div></td><td class="code"><div><pre><span></span><span class="k">SELECT</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="k">FROM</span><span class="w"> </span><span class="n">pg_foreign_server</span><span class="w"> </span><span class="k">WHERE</span><span class="w"> </span><span class="n">srvname</span><span class="o">=</span><span class="s1">'obs_server'</span><span class="p">;</span>
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</pre></div></td></tr></table></div>
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</div>
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<p id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0102810711_p182901244318">The server is successfully deleted if the returned result is as follows:</p>
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<div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0102810711_screen1290843319"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal">1</span>
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<span class="normal">2</span>
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<span class="normal">3</span></pre></div></td><td class="code"><div><pre><span></span><span class="w"> </span><span class="n">srvname</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">srvowner</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">srvfdw</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">srvtype</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">srvversion</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">srvacl</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">srvoptions</span>
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<span class="c1">---------+----------+--------+---------+------------+--------+------------</span>
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<span class="p">(</span><span class="mi">0</span><span class="w"> </span><span class="k">rows</span><span class="p">)</span>
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</pre></div></td></tr></table></div>
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</div>
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</p></li></ol>
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</div>
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<div class="section" id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0102810711_section12067301412"><a name="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0102810711_section12067301412"></a><a name="en-us_topic_0000001145491107_en-us_topic_0102810711_section12067301412"></a><h4 class="sectiontitle">Deleting the Database and the User to Which the Database Belongs</h4><p id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0102810711_p654581019428">If you have performed steps in <a href="dws_04_0244.html#EN-US_TOPIC_0000001188323676__en-us_topic_0000001099130938_en-us_topic_0102810708_section590417587243">(Optional) Creating a User and a Database and Granting the User Foreign Table Permissions</a>, perform the following steps to delete the database and the user to which the database belongs.</p>
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<ol id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0102810711_ol1230353084111"><li id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0102810711_li3301193034116"><span>Delete the customized database.</span><p><p id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_p119758200416">Connect to the default database <strong id="EN-US_TOPIC_0000001233761887__b1655841541115"><span id="EN-US_TOPIC_0000001233761887__text91831321465">gaussdb</span></strong> through the database client tool provided by <span id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_ph7922838162812">GaussDB(DWS)</span>.</p>
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<p id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0109259519_en-us_topic_0102427953_p8796721122412">If you have logged in to the database using the gsql client, run the following command to switch the database and user:</p>
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<p id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_p1524271564110">Switch to the default database.</p>
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<div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_screen15243161517413"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal">1</span></pre></div></td><td class="code"><div><pre><span></span><span class="err">\</span><span class="k">c</span><span class="w"> </span><span class="n">gaussdb</span>
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</pre></div></td></tr></table></div>
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</div>
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<p id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_p152431215134119">Enter your password as prompted.</p>
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<p id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_p124381518416">Run the following command to delete the customized database:</p>
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<div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_screen224381554115"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal">1</span></pre></div></td><td class="code"><div><pre><span></span><span class="k">DROP</span><span class="w"> </span><span class="k">DATABASE</span><span class="w"> </span><span class="n">mydatabase</span><span class="p">;</span>
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</pre></div></td></tr></table></div>
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</div>
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<p id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_p32431415174119">The database is deleted if the following information is displayed:</p>
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<div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_screen7243615164118"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal">1</span></pre></div></td><td class="code"><div><pre><span></span><span class="k">DROP</span><span class="w"> </span><span class="k">DATABASE</span>
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</pre></div></td></tr></table></div>
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</div>
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</p></li><li id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0102810711_li1830393034112"><span>Delete the common user created in this example as the administrator.</span><p><p id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_p773914234211">Connect to the database as a database administrator through the database client tool provided by <span id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_ph884632792510">GaussDB(DWS)</span>.</p>
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<p id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0109259519_en-us_topic_0102427953_p1547315810322">If you have logged in to the database using the <strong id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_b11260122275216">gsql</strong> client, run the following command to switch the database and user:</p>
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<div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_screen15839141144218"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal">1</span></pre></div></td><td class="code"><div><pre><span></span><span class="err">\</span><span class="k">c</span><span class="w"> </span><span class="n">gaussdb</span><span class="w"> </span><span class="n">dbadmin</span>
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</pre></div></td></tr></table></div>
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</div>
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<div class="p" id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_p14839710426">Run the following command to reclaim the permission for creating foreign servers:<div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_screen38399144212"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal">1</span></pre></div></td><td class="code"><div><pre><span></span><span class="k">REVOKE</span><span class="w"> </span><span class="k">ALL</span><span class="w"> </span><span class="k">ON</span><span class="w"> </span><span class="k">FOREIGN</span><span class="w"> </span><span class="k">DATA</span><span class="w"> </span><span class="n">WRAPPER</span><span class="w"> </span><span class="n">dfs_fdw</span><span class="w"> </span><span class="k">FROM</span><span class="w"> </span><span class="n">dbuser</span><span class="p">;</span>
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</pre></div></td></tr></table></div>
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</div>
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</div>
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<p id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_p128393194213">The name of <strong id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_b842352706112833">FOREIGN DATA WRAPPER</strong> must be <strong id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_b842352706112844">dfs_fdw</strong>. <strong id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_b84235270611292">dbuser</strong> is the username for creating <strong id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_b842352706112940">SERVER</strong>.</p>
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<p id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_p483951204210">Run the following command to delete the user:</p>
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<div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_screen6839111114213"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal">1</span></pre></div></td><td class="code"><div><pre><span></span><span class="k">DROP</span><span class="w"> </span><span class="k">USER</span><span class="w"> </span><span class="n">dbuser</span><span class="p">;</span>
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</pre></div></td></tr></table></div>
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</div>
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<p id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_p583910119424">You can run the <b><span class="cmdname" id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_cmdname383918114211">\du</span></b> command to query for the user and check whether the user has been deleted.</p>
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</p></li></ol>
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</div>
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<p id="EN-US_TOPIC_0000001233761887__en-us_topic_0000001145491107_en-us_topic_0102810711_p2303163011416"></p>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="dws_04_0155.html">Importing ORC or CarbonData Data from OBS</a></div>
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</div>
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</div>
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