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145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 2 分钟</span><meta property="timeRequired" content="PT2M"></span><!----><!----></div><hr></div><div class="vp-toc-placeholder"><aside id="toc"><!--[--><!----><!--]--><div class="vp-toc-header">此页内容<button type="button" class="print-button" title="打印"><svg xmlns="http://www.w3.org/2000/svg" class="icon print-icon" viewBox="0 0 1024 1024" fill="currentColor" aria-label="print icon"><path d="M819.2 364.8h-44.8V128c0-17.067-14.933-32-32-32H281.6c-17.067 0-32 14.933-32 32v236.8h-44.8C145.067 364.8 96 413.867 96 473.6v192c0 59.733 49.067 108.8 108.8 108.8h44.8V896c0 17.067 14.933 32 32 32h460.8c17.067 0 32-14.933 32-32V774.4h44.8c59.733 0 108.8-49.067 108.8-108.8v-192c0-59.733-49.067-108.8-108.8-108.8zM313.6 160h396.8v204.8H313.6V160zm396.8 704H313.6V620.8h396.8V864zM864 665.6c0 25.6-19.2 44.8-44.8 44.8h-44.8V588.8c0-17.067-14.933-32-32-32H281.6c-17.067 0-32 14.933-32 32v121.6h-44.8c-25.6 0-44.8-19.2-44.8-44.8v-192c0-25.6 19.2-44.8 44.8-44.8h614.4c25.6 0 44.8 19.2 44.8 44.8v192z"></path></svg></button><div class="arrow end"></div></div><div class="vp-toc-wrapper"><ul class="vp-toc-list"><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level2" href="#session-and-tsfile-api">Session And TsFile API</a></li><!----><!--]--></ul><div class="vp-toc-marker" style="top:-1.7rem;"></div></div><!--[--><!----><!--]--></aside></div><!--[--><!----><!--]--><div class="theme-hope-content"><h2 id="session-and-tsfile-api" tabindex="-1"><a class="header-anchor" href="#session-and-tsfile-api"><span>Session And TsFile API</span></a></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" data-title="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><p>如果您希望创建时间序列 <code>root.sg.a，root.sg.`a.``&quot;b`，root.sg.`111`</code>，您使用的 SQL 语句应该如下所示：</p><div class="language-SQL line-numbers-mode" data-ext="SQL" data-title="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" data-title="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" data-title="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><p>如果您希望向时间序列 <code>root.sg.a，root.sg.`a.``&quot;b`，root.sg.`111`</code> 中插入数据，您使用的 SQL 语句应该如下所示：</p><div class="language-SQL line-numbers-mode" data-ext="SQL" data-title="SQL"><pre class="language-SQL"><code>insert into root.sg(timestamp, a, `a.``&quot;b`, `111`) values (1, 2, 2, 2);
</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" data-title="Java"><pre class="language-Java"><code>// deviceId 为 root.sg
String deviceId = &quot;root.sg&quot;;

// measurements
String[] measurements = new String[]{&quot;a&quot;, &quot;`a.``\&quot;b`&quot;, &quot;`111`&quot;};
List&lt;String&gt; measurementList = Arrays.asList(measurements);
</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" data-title="Java"><pre class="language-Java"><code>public SessionDataSet executeRawDataQuery(
    List&lt;String&gt; paths, 
    long startTime, 
    long endTime)
    throws StatementExecutionException, IoTDBConnectionException;
</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><p>如果您希望查询时间序列<code>root.sg.a，root.sg.`a.``&quot;b`，root.sg.`111`</code>的数据，您使用的 SQL 语句应该如下所示：</p><div class="language-SQL line-numbers-mode" data-ext="SQL" data-title="SQL"><pre class="language-SQL"><code>select a from root.sg

# 路径结点名中包含特殊字符
select `a.``&quot;b` from root.sg;

# 路径结点名为实数
select `111` from root.sg
</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" data-title="Java"><pre class="language-Java"><code>// paths
String[] paths = new String[]{&quot;root.sg.a&quot;, &quot;root.sg.`a.``\&quot;b`&quot;, &quot;root.sg.`111`&quot;};
List&lt;String&gt; pathList = Arrays.asList(paths);
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