assets/Storage-Group.html-8c4a7780.js

import{_ as r,C as s,O as o,P as d,ah as c,Q as l,U as e,ai as t,ae as a,aW as i}from"./framework-44b8a372.js";const u={},h=i(`<h1 id="元数据操作" tabindex="-1"><a class="header-anchor" href="#元数据操作" aria-hidden="true">#</a> 元数据操作</h1><h2 id="存储组管理" tabindex="-1"><a class="header-anchor" href="#存储组管理" aria-hidden="true">#</a> 存储组管理</h2><h3 id="创建存储组" tabindex="-1"><a class="header-anchor" href="#创建存储组" aria-hidden="true">#</a> 创建存储组</h3><p>我们可以根据存储模型建立相应的存储组。创建存储组支持两种 SQL 语句，如下所示：</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>IoTDB &gt; set storage group to root.ln
IoTDB &gt; create storage group root.sgcc
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>根据以上两条 SQL 语句，我们可以创建出两个存储组。</p><p>需要注意的是，存储组的父子节点都不能再设置存储组。例如在已经有<code>root.ln</code>和<code>root.sgcc</code>这两个存储组的情况下，创建<code>root.ln.wf01</code>存储组是不可行的。系统将给出相应的错误提示，如下所示：</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>IoTDB&gt; set storage group to root.ln.wf01
Msg: 300: root.ln has already been set to storage group.
IoTDB&gt; create storage group root.ln.wf01
Msg: 300: root.ln has already been set to storage group.
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>存储组节点名只支持中英文字符、数字、下划线和中划线的组合。</p><p>还需注意，如果在 Windows 系统上部署，存储组名是大小写不敏感的。例如同时创建<code>root.ln</code> 和 <code>root.LN</code> 是不被允许的。</p><h3 id="查看存储组" tabindex="-1"><a class="header-anchor" href="#查看存储组" aria-hidden="true">#</a> 查看存储组</h3>`,11),g=i(`<div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>IoTDB&gt; show storage group
IoTDB&gt; show storage group root.*
IoTDB&gt; show storage group root.**
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>执行结果为：</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-------------+
|storage group|
+-------------+
|    root.sgcc|
|      root.ln|
+-------------+
Total line number = 2
It costs 0.060s
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="删除存储组" tabindex="-1"><a class="header-anchor" href="#删除存储组" aria-hidden="true">#</a> 删除存储组</h3><p>用户可以使用<code>DELETE STORAGE GROUP &lt;PathPattern&gt;</code>语句删除该路径模式匹配的所有的存储组。在删除的过程中，需要注意的是存储组的数据也会被删除。</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>IoTDB &gt; DELETE STORAGE GROUP root.ln
IoTDB &gt; DELETE STORAGE GROUP root.sgcc
// 删除所有数据，时间序列以及存储组
IoTDB &gt; DELETE STORAGE GROUP root.**
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div>`,6);function v(m,p){const n=s("RouterLink");return o(),d("div",null,[c(`

    Licensed to the Apache Software Foundation (ASF) under one
    or more contributor license agreements.  See the NOTICE file
    distributed with this work for additional information
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    to you under the Apache License, Version 2.0 (the
    "License"); you may not use this file except in compliance
    with the License.  You may obtain a copy of the License at
    
        http://www.apache.org/licenses/LICENSE-2.0
    
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`),h,l("p",null,[e("在存储组创建后，我们可以使用 "),t(n,{to:"/zh/UserGuide/V0.13.x/Reference/SQL-Reference.html"},{default:a(()=>[e("SHOW STORAGE GROUP")]),_:1}),e(" 语句和 "),t(n,{to:"/zh/UserGuide/V0.13.x/Reference/SQL-Reference.html"},{default:a(()=>[e("SHOW STORAGE GROUP <PathPattern>")]),_:1}),e(" 来查看存储组，SQL 语句如下所示：")]),g])}const x=r(u,[["render",v],["__file","Storage-Group.html.vue"]]);export{x as default};