assets/Session-And-TsFile-API.html-cdef9ec6.js

import{_ as t,C as r,O as o,P as d,ah as l,Q as n,U as e,ai as s,aW as a}from"./framework-62ad666a.js";const c={},u=a(`<h2 id="session-and-tsfile-api" tabindex="-1"><a class="header-anchor" href="#session-and-tsfile-api" aria-hidden="true">#</a> Session And TsFile API</h2><p>在使用Session、TsFIle API时，如果您调用的方法需要以字符串形式传入物理量（measurement）、设备（device）、数据库（database）、路径（path）等参数，<strong>请保证所传入字符串与使用 SQL 语句时的写法一致</strong>，下面是一些帮助您理解的例子。具体代码示例可以参考：<code>example/session/src/main/java/org/apache/iotdb/SyntaxConventionRelatedExample.java</code></p><ol><li>以创建时间序列 createTimeseries 为例：</li></ol><div class="language-Java line-numbers-mode" data-ext="Java"><pre class="language-Java"><code>public void createTimeseries(
    String path,
    TSDataType dataType,
    TSEncoding encoding,
    CompressionType compressor)
    throws IoTDBConnectionException, StatementExecutionException;
</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></div>`,4),v={href:"http://root.sg",target:"_blank",rel:"noopener noreferrer"},m={href:"http://root.sg",target:"_blank",rel:"noopener noreferrer"},g=a(`<div class="language-SQL line-numbers-mode" data-ext="SQL"><pre class="language-SQL"><code>create timeseries root.sg.a with datatype=FLOAT,encoding=PLAIN,compressor=SNAPPY;

# 路径结点名中包含特殊字符，时间序列各结点为[&quot;root&quot;,&quot;sg&quot;,&quot;a.\`\\&quot;b&quot;]
create timeseries root.sg.\`a.\`\`&quot;b\` with datatype=FLOAT,encoding=PLAIN,compressor=SNAPPY;

# 路径结点名为实数
create timeseries root.sg.\`111\` with datatype=FLOAT,encoding=PLAIN,compressor=SNAPPY;
</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></div><p>您在调用 createTimeseries 方法时，应该按照如下方法赋值 path 字符串，保证 path 字符串内容与使用 SQL 时一致：</p><div class="language-Java line-numbers-mode" data-ext="Java"><pre class="language-Java"><code>// 时间序列 root.sg.a
String path = &quot;root.sg.a&quot;;

// 时间序列 root.sg.\`a\`\`&quot;b\`
String path = &quot;root.sg.\`a\`\`\\&quot;b\`&quot;;

// 时间序列 root.sg.\`111\`
String path = &quot;root.sg.\`111\`&quot;;
</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><ol start="2"><li>以插入数据 insertRecord 为例：</li></ol><div class="language-Java line-numbers-mode" data-ext="Java"><pre class="language-Java"><code>public void insertRecord(
    String deviceId,
    long time,
    List&lt;String&gt; measurements,
    List&lt;TSDataType&gt; types,
    Object... values)
    throws IoTDBConnectionException, StatementExecutionException;
</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></div>`,5),p={href:"http://root.sg",target:"_blank",rel:"noopener noreferrer"},b={href:"http://root.sg",target:"_blank",rel:"noopener noreferrer"},h=a('<div class="language-SQL line-numbers-mode" data-ext="SQL"><pre class="language-SQL"><code>insert into root.sg(timestamp, a, `a.``&quot;b`, `111`) values (1, 2, 2, 2);\n</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>您在调用 insertRecord 方法时，应该按照如下方法赋值 deviceId 和 measurements：</p><div class="language-Java line-numbers-mode" data-ext="Java"><pre class="language-Java"><code>// deviceId 为 root.sg\nString deviceId = &quot;root.sg&quot;;\n\n// measurements\nString[] measurements = new String[]{&quot;a&quot;, &quot;`a.``\\&quot;b`&quot;, &quot;`111`&quot;};\nList&lt;String&gt; measurementList = Arrays.asList(measurements);\n</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></div><ol start="3"><li>以查询数据 executeRawDataQuery 为例：</li></ol><div class="language-Java line-numbers-mode" data-ext="Java"><pre class="language-Java"><code>public SessionDataSet executeRawDataQuery(\n    List&lt;String&gt; paths, \n    long startTime, \n    long endTime)\n    throws StatementExecutionException, IoTDBConnectionException;\n</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></div>',5),S={href:"http://root.sg",target:"_blank",rel:"noopener noreferrer"},L={href:"http://root.sg",target:"_blank",rel:"noopener noreferrer"},_=a('<div class="language-SQL line-numbers-mode" data-ext="SQL"><pre class="language-SQL"><code>select a from root.sg\n\n# 路径结点名中包含特殊字符\nselect `a.``&quot;b` from root.sg;\n\n# 路径结点名为实数\nselect `111` from root.sg\n</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></div><p>您在调用 executeRawDataQuery 方法时，应该按照如下方法赋值 paths：</p><div class="language-Java line-numbers-mode" data-ext="Java"><pre class="language-Java"><code>// paths\nString[] paths = new String[]{&quot;root.sg.a&quot;, &quot;root.sg.`a.``\\&quot;b`&quot;, &quot;root.sg.`111`&quot;};\nList&lt;String&gt; pathList = Arrays.asList(paths);\n</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>',3);function f(q,x){const i=r("ExternalLinkIcon");return o(),d("div",null,[l(`

    Licensed to the Apache Software Foundation (ASF) under one
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    to you under the Apache License, Version 2.0 (the
    "License"); you may not use this file except in compliance
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    under the License.

`),u,n("p",null,[e("如果您希望创建时间序列 root.sg.a，"),n("a",v,[e("root.sg"),s(i)]),e('.`a.``"b`，'),n("a",m,[e("root.sg"),s(i)]),e(".`111`，您使用的 SQL 语句应该如下所示：")]),g,n("p",null,[e("如果您希望向时间序列 root.sg.a，"),n("a",p,[e("root.sg"),s(i)]),e('.`a.``"b`，'),n("a",b,[e("root.sg"),s(i)]),e(".`111`中插入数据，您使用的 SQL 语句应该如下所示：")]),h,n("p",null,[e("如果您希望查询时间序列 root.sg.a，"),n("a",S,[e("root.sg"),s(i)]),e('.`a.``"b`，'),n("a",L,[e("root.sg"),s(i)]),e(".`111`的数据，您使用的 SQL 语句应该如下所示：")]),_])}const A=t(c,[["render",f],["__file","Session-And-TsFile-API.html.vue"]]);export{A as default};