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| 系统设计 |
| <!----></a></div><div class="nav-item"><a href="/zh/Download/" class="nav-link">下载</a></div><div class="nav-item"><div class="dropdown-wrapper"><a class="dropdown-title"><span class="title">社区</span> <span class="arrow right"></span></a> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="/zh/Community/About.html" class="nav-link">关于社区</a></li><li class="dropdown-item"><!----> <a href="https://cwiki.apache.org/confluence/display/iotdb" class="nav-link external"> |
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| 基金会 |
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| <!----></a></li><li class="dropdown-item"><!----> <a href="http://www.apache.org/events/current-event" class="nav-link external"> |
| 活动 |
| <!----></a></li></ul></div></div><div class="nav-item"><div class="dropdown-wrapper"><a class="dropdown-title"><span class="title">语言</span> <span class="arrow right"></span></a> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="/UserGuide/V0.13.x/Reference/SQL-Reference.html" class="nav-link">English</a></li><li class="dropdown-item"><!----> <a href="/zh/UserGuide/V0.13.x/Reference/SQL-Reference.html" aria-current="page" class="nav-link router-link-exact-active router-link-active">简体中文</a></li></ul></div></div> <a href="https://github.com/apache/iotdb.git" target="_blank" rel="noopener noreferrer" class="repo-link"> |
| GitHub |
| <span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a></nav> <ul class="sidebar-links"><li><section class="sidebar-group depth-0"><p class="sidebar-heading open"><span>IoTDB用户手册 (In progress)</span> <!----></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>IoTDB简介</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>快速上手</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>数据模式与概念</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>语法约定</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>应用编程接口</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>元数据操作</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>数据写入和删除</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>数据查询</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>数据处理</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>权限管理</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>运维工具</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>系统集成</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>集群搭建</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>UDF 资料库</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>参考</span> <span class="arrow right"></span></p> <!----></section></li></ul> </aside> <main class="page"> <div class="content content__default"><h1 id="sql-参考文档"><a href="#sql-参考文档" class="header-anchor">#</a> SQL 参考文档</h1> <h2 id="显示版本号"><a href="#显示版本号" class="header-anchor">#</a> 显示版本号</h2> <div class="language-sql line-numbers-mode"><pre class="language-sql"><code><span class="token keyword">show</span> version |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><div class="language- line-numbers-mode"><pre class="language-text"><code>+---------------+ |
| | version| |
| +---------------+ |
| |0.13.0-SNAPSHOT| |
| +---------------+ |
| Total line number = 1 |
| It costs 0.417s |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br></div></div><h2 id="schema-语句"><a href="#schema-语句" class="header-anchor">#</a> Schema 语句</h2> <ul><li>设置存储组</li></ul> <div class="language-SQL line-numbers-mode"><pre class="language-sql"><code><span class="token keyword">SET</span> STORAGE <span class="token keyword">GROUP</span> <span class="token keyword">TO</span> <span class="token operator"><</span>FullPath<span class="token operator">></span> |
| Eg: IoTDB <span class="token operator">></span> <span class="token keyword">SET</span> STORAGE <span class="token keyword">GROUP</span> <span class="token keyword">TO</span> root<span class="token punctuation">.</span>ln<span class="token punctuation">.</span>wf01<span class="token punctuation">.</span>wt01 |
| Note: FullPath can <span class="token operator">not</span> include wildcard <span class="token identifier"><span class="token punctuation">`</span>*<span class="token punctuation">`</span></span> <span class="token operator">or</span> <span class="token identifier"><span class="token punctuation">`</span>**<span class="token punctuation">`</span></span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><ul><li>删除存储组</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>DELETE STORAGE GROUP <PathPattern> [COMMA <PathPattern>]* |
| Eg: IoTDB > DELETE STORAGE GROUP root.ln |
| Eg: IoTDB > DELETE STORAGE GROUP root.* |
| Eg: IoTDB > DELETE STORAGE GROUP root.** |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br></div></div><ul><li>创建时间序列语句</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>CREATE TIMESERIES <FullPath> WITH <AttributeClauses> |
| alias |
| : LR_BRACKET ID RR_BRACKET |
| ; |
| attributeClauses |
| : DATATYPE OPERATOR_EQ <DataTypeValue> |
| COMMA ENCODING OPERATOR_EQ <EncodingValue> |
| (COMMA (COMPRESSOR | COMPRESSION) OPERATOR_EQ <CompressorValue>)? |
| (COMMA property)* |
| tagClause |
| attributeClause |
| ; |
| attributeClause |
| : ATTRIBUTES LR_BRACKET propertyClause (COMMA propertyClause)* RR_BRACKET |
| ; |
| tagClause |
| : TAGS LR_BRACKET propertyClause (COMMA propertyClause)* RR_BRACKET |
| ; |
| propertyClause |
| : name=ID OPERATOR_EQ propertyValue |
| ; |
| DataTypeValue: BOOLEAN | DOUBLE | FLOAT | INT32 | INT64 | TEXT |
| EncodingValue: GORILLA | PLAIN | RLE | TS_2DIFF | REGULAR |
| CompressorValue: UNCOMPRESSED | SNAPPY |
| AttributesType: SDT | COMPDEV | COMPMINTIME | COMPMAXTIME |
| PropertyValue: ID | constant |
| Eg: CREATE TIMESERIES root.ln.wf01.wt01.status WITH DATATYPE=BOOLEAN, ENCODING=PLAIN |
| Eg: CREATE TIMESERIES root.ln.wf01.wt01.temperature WITH DATATYPE=FLOAT, ENCODING=RLE |
| Eg: CREATE TIMESERIES root.ln.wf01.wt01.temperature WITH DATATYPE=FLOAT, ENCODING=RLE, COMPRESSOR=SNAPPY, MAX_POINT_NUMBER=3 |
| Eg: CREATE TIMESERIES root.turbine.d0.s0(temperature) WITH DATATYPE=FLOAT, ENCODING=RLE, COMPRESSOR=SNAPPY tags(unit=f, description='turbine this is a test1') attributes(H_Alarm=100, M_Alarm=50) |
| Eg: CREATE TIMESERIES root.ln.wf01.wt01.temperature WITH DATATYPE=FLOAT, ENCODING=RLE, LOSS=SDT, COMPDEV=0.01 |
| Eg: CREATE TIMESERIES root.ln.wf01.wt01.temperature WITH DATATYPE=FLOAT, ENCODING=RLE, LOSS=SDT, COMPDEV=0.01, COMPMINTIME=3 |
| Eg: CREATE TIMESERIES root.ln.wf01.wt01.temperature WITH DATATYPE=FLOAT, ENCODING=RLE, LOSS=SDT, COMPDEV=0.01, COMPMINTIME=2, COMPMAXTIME=15 |
| Note: Datatype and encoding type must be corresponding. Please check Chapter 3 Encoding Section for details. |
| Note: When propertyValue is SDT, it is required to set compression deviation COMPDEV, which is the maximum absolute difference between values. |
| Note: For SDT, values withtin COMPDEV will be discarded. |
| Note: For SDT, it is optional to set compression minimum COMPMINTIME, which is the minimum time difference between stored values for purpose of noise reduction. |
| Note: For SDT, it is optional to set compression maximum COMPMAXTIME, which is the maximum time difference between stored values regardless of COMPDEV. |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br><span class="line-number">25</span><br><span class="line-number">26</span><br><span class="line-number">27</span><br><span class="line-number">28</span><br><span class="line-number">29</span><br><span class="line-number">30</span><br><span class="line-number">31</span><br><span class="line-number">32</span><br><span class="line-number">33</span><br><span class="line-number">34</span><br><span class="line-number">35</span><br><span class="line-number">36</span><br><span class="line-number">37</span><br><span class="line-number">38</span><br></div></div><ul><li>创建时间序列语句（简化版本，从v0.13起支持）</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>CREATE TIMESERIES <FullPath> <SimplifiedAttributeClauses> |
| SimplifiedAttributeClauses |
| : WITH? (DATATYPE OPERATOR_EQ)? <DataTypeValue> |
| ENCODING OPERATOR_EQ <EncodingValue> |
| ((COMPRESSOR | COMPRESSION) OPERATOR_EQ <CompressorValue>)? |
| (COMMA property)* |
| tagClause |
| attributeClause |
| ; |
| Eg: CREATE TIMESERIES root.ln.wf01.wt01.status BOOLEAN ENCODING=PLAIN |
| Eg: CREATE TIMESERIES root.ln.wf01.wt01.temperature FLOAT ENCODING=RLE |
| Eg: CREATE TIMESERIES root.ln.wf01.wt01.temperature FLOAT ENCODING=RLE COMPRESSOR=SNAPPY MAX_POINT_NUMBER=3 |
| Eg: CREATE TIMESERIES root.turbine.d0.s0(temperature) FLOAT ENCODING=RLE COMPRESSOR=SNAPPY tags(unit=f, description='turbine this is a test1') attributes(H_Alarm=100, M_Alarm=50) |
| Eg: CREATE TIMESERIES root.ln.wf01.wt01.temperature FLOAT ENCODING=RLE LOSS=SDT COMPDEV=0.01 |
| Eg: CREATE TIMESERIES root.ln.wf01.wt01.temperature FLOAT ENCODING=RLE LOSS=SDT COMPDEV=0.01 COMPMINTIME=3 |
| Eg: CREATE TIMESERIES root.ln.wf01.wt01.temperature FLOAT ENCODING=RLE LOSS=SDT COMPDEV=0.01 COMPMINTIME=2 COMPMAXTIME=15 |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br></div></div><ul><li>创建对齐时间序列语句</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>CREATE ALIGNED TIMESERIES <FullPath> alignedMeasurements |
| alignedMeasurements |
| : LR_BRACKET nodeNameWithoutWildcard attributeClauses |
| (COMMA nodeNameWithoutWildcard attributeClauses)+ RR_BRACKET |
| ; |
| Eg: CREATE ALIGNED TIMESERIES root.ln.wf01.GPS(lat FLOAT ENCODING=GORILLA, lon FLOAT ENCODING=GORILLA COMPRESSOR=SNAPPY) |
| Note: It is not supported to set different compression for a group of aligned timeseries. |
| Note: It is not currently supported to set an alias, tag, and attribute for aligned timeseries. |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br></div></div><ul><li>创建元数据模板语句</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>CREATE SCHEMA TEMPLATE <TemplateName> LR_BRACKET <TemplateMeasurementClause> (COMMA plateMeasurementClause>)* RR_BRACKET |
| templateMeasurementClause |
| : suffixPath attributeClauses #nonAlignedTemplateMeasurement |
| | suffixPath LR_BRACKET nodeNameWithoutWildcard attributeClauses |
| (COMMA nodeNameWithoutWildcard attributeClauses)+ RR_BRACKET #alignedTemplateMeasurement |
| ; |
| Eg: CREATE SCHEMA TEMPLATE temp1( |
| s1 INT32 encoding=Gorilla, compression=SNAPPY, |
| vector1( |
| s1 INT32 encoding=Gorilla, |
| s2 FLOAT encoding=RLE, compression=SNAPPY) |
| ) |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br></div></div><ul><li>挂载元数据模板语句</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SET SCHEMA TEMPLATE <TemplateName> TO <PrefixPath> |
| Eg: SET SCHEMA TEMPLATE temp1 TO root.beijing |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br></div></div><ul><li>根据元数据模板创建时间序列语句</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>CREATE TIMESERIES OF SCHEMA TEMPLATE ON <PrefixPath> |
| Eg: CREATE TIMESERIES OF SCHEMA TEMPLATE ON root.beijing |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br></div></div><ul><li>卸载元数据模板语句</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>UNSET SCHEMA TEMPLATE <TemplateName> FROM <PrefixPath> |
| Eg: UNSET SCHEMA TEMPLATE temp1 FROM root.beijing |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br></div></div><ul><li>删除时间序列语句</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>DELETE TIMESERIES <PathPattern> [COMMA <PathPattern>]* |
| Eg: IoTDB > DELETE TIMESERIES root.ln.wf01.wt01.status |
| Eg: IoTDB > DELETE TIMESERIES root.ln.wf01.wt01.status, root.ln.wf01.wt01.temperature |
| Eg: IoTDB > DELETE TIMESERIES root.ln.wf01.wt01.* |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br></div></div><ul><li>修改时间序列标签属性语句</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>ALTER TIMESERIES fullPath alterClause |
| alterClause |
| : RENAME beforeName=ID TO currentName=ID |
| | SET property (COMMA property)* |
| | DROP ID (COMMA ID)* |
| | ADD TAGS property (COMMA property)* |
| | ADD ATTRIBUTES property (COMMA property)* |
| | UPSERT tagClause attributeClause |
| ; |
| attributeClause |
| : (ATTRIBUTES LR_BRACKET property (COMMA property)* RR_BRACKET)? |
| ; |
| tagClause |
| : (TAGS LR_BRACKET property (COMMA property)* RR_BRACKET)? |
| ; |
| Eg: ALTER timeseries root.turbine.d1.s1 RENAME tag1 TO newTag1 |
| Eg: ALTER timeseries root.turbine.d1.s1 SET tag1=newV1, attr1=newV1 |
| Eg: ALTER timeseries root.turbine.d1.s1 DROP tag1, tag2 |
| Eg: ALTER timeseries root.turbine.d1.s1 ADD TAGS tag3=v3, tag4=v4 |
| Eg: ALTER timeseries root.turbine.d1.s1 ADD ATTRIBUTES attr3=v3, attr4=v4 |
| EG: ALTER timeseries root.turbine.d1.s1 UPSERT TAGS(tag2=newV2, tag3=v3) ATTRIBUTES(attr3=v3, attr4=v4) |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br></div></div><ul><li>显示所有时间序列语句</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SHOW TIMESERIES |
| Eg: IoTDB > SHOW TIMESERIES |
| Note: This statement can only be used in IoTDB Client. If you need to show all timeseries in JDBC, please use `DataBaseMetadata` interface. |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><ul><li>显示特定时间序列语句</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SHOW TIMESERIES <Path> |
| Eg: IoTDB > SHOW TIMESERIES root.** |
| Eg: IoTDB > SHOW TIMESERIES root.ln.** |
| Eg: IoTDB > SHOW TIMESERIES root.ln.*.*.status |
| Eg: IoTDB > SHOW TIMESERIES root.ln.wf01.wt01.status |
| Note: The path can be timeseries path or path pattern |
| Note: This statement can be used in IoTDB Client and JDBC. |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br></div></div><ul><li>显示满足条件的时间序列语句</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SHOW TIMESERIES pathPattern? showWhereClause? |
| showWhereClause |
| : WHERE (property | containsExpression) |
| ; |
| containsExpression |
| : name=ID OPERATOR_CONTAINS value=propertyValue |
| ; |
| |
| Eg: show timeseries root.ln.** where unit='c' |
| Eg: show timeseries root.ln.** where description contains 'test1' |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br></div></div><ul><li>分页显示满足条件的时间序列语句</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SHOW TIMESERIES pathPattern? showWhereClause? limitClause? |
| |
| showWhereClause |
| : WHERE (property | containsExpression) |
| ; |
| containsExpression |
| : name=ID OPERATOR_CONTAINS value=propertyValue |
| ; |
| limitClause |
| : LIMIT INT offsetClause? |
| | offsetClause? LIMIT INT |
| ; |
| |
| Eg: show timeseries root.ln.** where unit='c' |
| Eg: show timeseries root.ln.** where description contains 'test1' |
| Eg: show timeseries root.ln.** where unit='c' limit 10 offset 10 |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br></div></div><ul><li>显示存储组语句</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SHOW STORAGE GROUP |
| Eg: IoTDB > SHOW STORAGE GROUP |
| Note: This statement can be used in IoTDB Client and JDBC. |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><ul><li>显示特定存储组语句</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SHOW STORAGE GROUP <PathPattern> |
| Eg: IoTDB > SHOW STORAGE GROUP root.* |
| Eg: IoTDB > SHOW STORAGE GROUP root.** |
| Eg: IoTDB > SHOW STORAGE GROUP root.ln |
| Note: This statement can be used in IoTDB Client and JDBC. |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br></div></div><ul><li>显示 Merge 状态语句</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SHOW MERGE INFO |
| Eg: IoTDB > SHOW MERGE INFO |
| Note: This statement can be used in IoTDB Client and JDBC. |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><ul><li>显示指定路径下时间序列数语句</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>COUNT TIMESERIES <Path> |
| Eg: IoTDB > COUNT TIMESERIES root.** |
| Eg: IoTDB > COUNT TIMESERIES root.ln.** |
| Eg: IoTDB > COUNT TIMESERIES root.ln.*.*.status |
| Eg: IoTDB > COUNT TIMESERIES root.ln.wf01.wt01.status |
| Note: The path can be timeseries path or path pattern. |
| Note: This statement can be used in IoTDB Client and JDBC. |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br></div></div><div class="language- line-numbers-mode"><pre class="language-text"><code>COUNT TIMESERIES <Path> GROUP BY LEVEL=<INTEGER> |
| Eg: IoTDB > COUNT TIMESERIES root.** GROUP BY LEVEL=1 |
| Eg: IoTDB > COUNT TIMESERIES root.ln.** GROUP BY LEVEL=2 |
| Eg: IoTDB > COUNT TIMESERIES root.ln.wf01.* GROUP BY LEVEL=3 |
| Note: The path can be timeseries path or path pattern. |
| Note: This statement can be used in IoTDB Client and JDBC. |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br></div></div><ul><li>显示指定路径下特定层级的节点数语句</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>COUNT NODES <Path> LEVEL=<INTEGER> |
| Eg: IoTDB > COUNT NODES root.** LEVEL=2 |
| Eg: IoTDB > COUNT NODES root.ln.** LEVEL=2 |
| Eg: IoTDB > COUNT NODES root.ln.*.* LEVEL=3 |
| Eg: IoTDB > COUNT NODES root.ln.wf01.* LEVEL=3 |
| Note: The path can be timeseries path or path pattern. |
| Note: This statement can be used in IoTDB Client and JDBC. |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br></div></div><ul><li>显示所有设备语句</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SHOW DEVICES (WITH STORAGE GROUP)? limitClause? |
| Eg: IoTDB > SHOW DEVICES |
| Eg: IoTDB > SHOW DEVICES WITH STORAGE GROUP |
| Note: This statement can be used in IoTDB Client and JDBC. |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br></div></div><ul><li>显示特定设备语句</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SHOW DEVICES <PathPattern> (WITH STORAGE GROUP)? limitClause? |
| Eg: IoTDB > SHOW DEVICES root.** |
| Eg: IoTDB > SHOW DEVICES root.ln.* |
| Eg: IoTDB > SHOW DEVICES root.*.wf01 |
| Eg: IoTDB > SHOW DEVICES root.ln.* WITH STORAGE GROUP |
| Eg: IoTDB > SHOW DEVICES root.*.wf01 WITH STORAGE GROUP |
| Note: The path can be path pattern. |
| Note: This statement can be used in IoTDB Client and JDBC. |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br></div></div><ul><li>显示 ROOT 节点的子节点名称语句</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SHOW CHILD PATHS |
| Eg: IoTDB > SHOW CHILD PATHS |
| Note: This statement can be used in IoTDB Client and JDBC. |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><ul><li>显示子节点名称语句</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SHOW CHILD PATHS <PathPattern> |
| Eg: IoTDB > SHOW CHILD PATHS root |
| Eg: IoTDB > SHOW CHILD PATHS root.ln |
| Eg: IoTDB > SHOW CHILD PATHS root.*.wf01 |
| Eg: IoTDB > SHOW CHILD PATHS root.ln.wf* |
| Note: This statement can be used in IoTDB Client and JDBC. |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br></div></div><ul><li>为 schema 创建快照</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>CREATE SNAPSHOT FOR SCHEMA |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><h2 id="数据管理语句"><a href="#数据管理语句" class="header-anchor">#</a> 数据管理语句</h2> <ul><li>插入记录语句</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>INSERT INTO <PrefixPath> LPAREN TIMESTAMP COMMA <Sensor> [COMMA <Sensor>]* RPAREN VALUES LPAREN <TimeValue>, <PointValue> [COMMA <PointValue>]* RPAREN |
| Sensor : Identifier |
| Eg: IoTDB > INSERT INTO root.ln.wf01.wt01(timestamp,status) values(1509465600000,true) |
| Eg: IoTDB > INSERT INTO root.ln.wf01.wt01(timestamp,status) VALUES(NOW(), false) |
| Eg: IoTDB > INSERT INTO root.ln.wf01.wt01(timestamp,temperature) VALUES(2017-11-01T00:17:00.000+08:00,24.22028) |
| Eg: IoTDB > INSERT INTO root.ln.wf01.wt01(timestamp,status,temperature) VALUES (1509466680000,false,20.060787) |
| Eg: IoTDB > INSERT INTO root.sg.d1(timestamp,(s1,s2),(s3,s4)) VALUES (1509466680000,(1.0,2),(NULL,4)) |
| Note: the statement needs to satisfy this constraint: <PrefixPath> + <Path> = <Timeseries> |
| Note: The order of Sensor and PointValue need one-to-one correspondence |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br></div></div><ul><li>删除记录语句</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>DELETE FROM <PathPattern> [COMMA <PathPattern>]* [WHERE <WhereClause>]? |
| WhereClause : <Condition> [(AND) <Condition>]* |
| Condition : <TimeExpr> [(AND) <TimeExpr>]* |
| TimeExpr : TIME PrecedenceEqualOperator (<TimeValue> | <RelativeTime>) |
| Eg: DELETE FROM root.ln.wf01.wt01.temperature WHERE time > 2016-01-05T00:15:00+08:00 and time < 2017-11-1T00:05:00+08:00 |
| Eg: DELETE FROM root.ln.wf01.wt01.status, root.ln.wf01.wt01.temperature WHERE time < NOW() |
| Eg: DELETE FROM root.ln.wf01.wt01.* WHERE time >= 1509466140000 |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br></div></div><ul><li>选择记录语句</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SELECT <SelectClause> FROM <FromClause> [WHERE <WhereClause>]? |
| SelectClause : <SelectPath> (COMMA <SelectPath>)* |
| SelectPath : <FUNCTION> LPAREN <Path> RPAREN | <Path> |
| FUNCTION : ‘COUNT’ , ‘MIN_TIME’, ‘MAX_TIME’, ‘MIN_VALUE’, ‘MAX_VALUE’ |
| FromClause : <PrefixPath> (COMMA <PrefixPath>)? |
| WhereClause : <Condition> [(AND | OR) <Condition>]* |
| Condition : <Expression> [(AND | OR) <Expression>]* |
| Expression : [NOT | !]? <TimeExpr> | [NOT | !]? <SensorExpr> |
| TimeExpr : TIME PrecedenceEqualOperator (<TimeValue> | <RelativeTime>) |
| RelativeTimeDurationUnit = Integer ('Y'|'MO'|'W'|'D'|'H'|'M'|'S'|'MS'|'US'|'NS') |
| RelativeTime : (now() | <TimeValue>) [(+|-) RelativeTimeDurationUnit]+ |
| SensorExpr : (<Timeseries> | <Path>) PrecedenceEqualOperator <PointValue> |
| Eg: IoTDB > SELECT status, temperature FROM root.ln.wf01.wt01 WHERE temperature < 24 and time > 2017-11-01 00:13:00 |
| Eg. IoTDB > SELECT ** FROM root |
| Eg. IoTDB > SELECT * FROM root.** |
| Eg. IoTDB > SELECT * FROM root.** where time > now() - 5m |
| Eg. IoTDB > SELECT * FROM root.ln.*.wf* |
| Eg. IoTDB > SELECT COUNT(temperature) FROM root.ln.wf01.wt01 WHERE root.ln.wf01.wt01.temperature < 25 |
| Eg. IoTDB > SELECT MIN_TIME(temperature) FROM root.ln.wf01.wt01 WHERE root.ln.wf01.wt01.temperature < 25 |
| Eg. IoTDB > SELECT MAX_TIME(temperature) FROM root.ln.wf01.wt01 WHERE root.ln.wf01.wt01.temperature > 24 |
| Eg. IoTDB > SELECT MIN_VALUE(temperature) FROM root.ln.wf01.wt01 WHERE root.ln.wf01.wt01.temperature > 23 |
| Eg. IoTDB > SELECT MAX_VALUE(temperature) FROM root.ln.wf01.wt01 WHERE root.ln.wf01.wt01.temperature < 25 |
| Eg. IoTDB > SELECT COUNT(temperature) FROM root.ln.wf01.wt01 WHERE root.ln.wf01.wt01.temperature < 25 GROUP BY LEVEL=1 |
| Note: the statement needs to satisfy this constraint: <Path>(SelectClause) + <PrefixPath>(FromClause) = <Timeseries> |
| Note: If the <SensorExpr>(WhereClause) is started with <Path> and not with ROOT, the statement needs to satisfy this constraint: <PrefixPath>(FromClause) + <Path>(SensorExpr) = <Timeseries> |
| Note: In Version 0.7.0, if <WhereClause> includes `OR`, time filter can not be used. |
| Note: There must be a space on both sides of the plus and minus operator appearing in the time expression |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br><span class="line-number">25</span><br><span class="line-number">26</span><br><span class="line-number">27</span><br></div></div><ul><li>Group By 语句</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SELECT <SelectClause> FROM <FromClause> WHERE <WhereClause> GROUP BY <GroupByTimeClause> |
| SelectClause : <Function> [COMMA < Function >]* |
| Function : <AggregationFunction> LPAREN <Path> RPAREN |
| FromClause : <PrefixPath> |
| WhereClause : <Condition> [(AND | OR) <Condition>]* |
| Condition : <Expression> [(AND | OR) <Expression>]* |
| Expression : [NOT | !]? <TimeExpr> | [NOT | !]? <SensorExpr> |
| TimeExpr : TIME PrecedenceEqualOperator (<TimeValue> | <RelativeTime>) |
| RelativeTimeDurationUnit = Integer ('Y'|'MO'|'W'|'D'|'H'|'M'|'S'|'MS'|'US'|'NS') |
| RelativeTime : (now() | <TimeValue>) [(+|-) RelativeTimeDurationUnit]+ |
| SensorExpr : (<Timeseries> | <Path>) PrecedenceEqualOperator <PointValue> |
| GroupByTimeClause : LPAREN <TimeInterval> COMMA <TimeUnit> (COMMA <TimeUnit>)? RPAREN |
| TimeInterval: LSBRACKET <TimeValue> COMMA <TimeValue> RRBRACKET | LRBRACKET <TimeValue> COMMA <TimeValue> RSBRACKET |
| TimeUnit : Integer <DurationUnit> |
| DurationUnit : "ms" | "s" | "m" | "h" | "d" | "w" | "mo" |
| Eg: SELECT COUNT(status), COUNT(temperature) FROM root.ln.wf01.wt01 where temperature < 24 GROUP BY([1509465720000, 1509466380000), 5m) |
| Eg: SELECT COUNT(status), COUNT(temperature) FROM root.ln.wf01.wt01 where temperature < 24 GROUP BY((1509465720000, 1509466380000], 5m) |
| Eg. SELECT COUNT (status), MAX_VALUE(temperature) FROM root.ln.wf01.wt01 WHERE time < 1509466500000 GROUP BY([1509465720000, 1509466380000), 5m, 10m) |
| Eg. SELECT MIN_TIME(status), MIN_VALUE(temperature) FROM root.ln.wf01.wt01 WHERE temperature < 25 GROUP BY ([1509466140000, 1509466380000), 3m, 5ms) |
| Eg. SELECT MIN_TIME(status), MIN_VALUE(temperature) FROM root.ln.wf01.wt01 WHERE temperature < 25 GROUP BY ((1509466140000, 1509466380000], 3m, 5ms) |
| Eg. SELECT MIN_TIME(status), MIN_VALUE(temperature) FROM root.ln.wf01.wt01 WHERE temperature < 25 GROUP BY ((1509466140000, 1509466380000], 1mo) |
| Eg. SELECT MIN_TIME(status), MIN_VALUE(temperature) FROM root.ln.wf01.wt01 WHERE temperature < 25 GROUP BY ((1509466140000, 1509466380000], 1mo, 1mo) |
| Eg. SELECT MIN_TIME(status), MIN_VALUE(temperature) FROM root.ln.wf01.wt01 WHERE temperature < 25 GROUP BY ((1509466140000, 1509466380000], 1mo, 2mo) |
| Note: the statement needs to satisfy this constraint: <Path>(SelectClause) + <PrefixPath>(FromClause) = <Timeseries> |
| Note: If the <SensorExpr>(WhereClause) is started with <Path> and not with ROOT, the statement needs to satisfy this constraint: <PrefixPath>(FromClause) + <Path>(SensorExpr) = <Timeseries> |
| Note: <TimeValue>(TimeInterval) needs to be greater than 0 |
| Note: First <TimeValue>(TimeInterval) in needs to be smaller than second <TimeValue>(TimeInterval) |
| Note: <TimeUnit> needs to be greater than 0 |
| Note: Third <TimeUnit> if set shouldn't be smaller than second <TimeUnit> |
| Note: If the second <DurationUnit> is "mo", the third <DurationUnit> need to be in month |
| Note: If the third <DurationUnit> is "mo", the second <DurationUnit> can be in any unit |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br><span class="line-number">25</span><br><span class="line-number">26</span><br><span class="line-number">27</span><br><span class="line-number">28</span><br><span class="line-number">29</span><br><span class="line-number">30</span><br><span class="line-number">31</span><br></div></div><ul><li>Fill 语句</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SELECT <SelectClause> FROM <FromClause> WHERE <WhereClause> FILL <FillClause> |
| SelectClause : <Path> [COMMA <Path>]* |
| FromClause : < PrefixPath > [COMMA < PrefixPath >]* |
| WhereClause : <WhereExpression> |
| WhereExpression : TIME EQUAL <TimeValue> |
| FillClause : LPAREN <TypeClause> [COMMA <TypeClause>]* RPAREN |
| TypeClause : <Int32Clause> | <Int64Clause> | <FloatClause> | <DoubleClause> | <BoolClause> | <TextClause> |
| Int32Clause: INT32 LBRACKET (<LinearClause> | <PreviousClause>) RBRACKET |
| Int64Clause: INT64 LBRACKET (<LinearClause> | <PreviousClause>) RBRACKET |
| FloatClause: FLOAT LBRACKET (<LinearClause> | <PreviousClause>) RBRACKET |
| DoubleClause: DOUBLE LBRACKET (<LinearClause> | <PreviousClause>) RBRACKET |
| BoolClause: BOOLEAN LBRACKET (<LinearClause> | <PreviousClause>) RBRACKET |
| TextClause: TEXT LBRACKET (<LinearClause> | <PreviousClause>) RBRACKET |
| PreviousClause : PREVIOUS [COMMA <ValidPreviousTime>]? |
| LinearClause : LINEAR [COMMA <ValidPreviousTime> COMMA <ValidBehindTime>]? |
| ValidPreviousTime, ValidBehindTime: <TimeUnit> |
| TimeUnit : Integer <DurationUnit> |
| DurationUnit : "ms" | "s" | "m" | "h" | "d" | "w" |
| Eg: SELECT temperature FROM root.ln.wf01.wt01 WHERE time = 2017-11-01T16:37:50.000 FILL(float[previous, 1m]) |
| Eg: SELECT temperature,status FROM root.ln.wf01.wt01 WHERE time = 2017-11-01T16:37:50.000 FILL (float[linear, 1m, 1m], boolean[previous, 1m]) |
| Eg: SELECT temperature,status,hardware FROM root.ln.wf01.wt01 WHERE time = 2017-11-01T16:37:50.000 FILL (float[linear, 1m, 1m], boolean[previous, 1m], text[previous]) |
| Eg: SELECT temperature,status,hardware FROM root.ln.wf01.wt01 WHERE time = 2017-11-01T16:37:50.000 FILL (float[linear], boolean[previous, 1m], text[previous]) |
| Note: the statement needs to satisfy this constraint: <PrefixPath>(FromClause) + <Path>(SelectClause) = <Timeseries> |
| Note: Integer in <TimeUnit> needs to be greater than 0 |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br></div></div><ul><li>Group By Fill 语句</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code># time 区间规则为：只能为左开右闭或左闭右开，例如：[20, 100) |
| |
| SELECT <SelectClause> FROM <FromClause> WHERE <WhereClause> GROUP BY <GroupByClause> (FILL <GROUPBYFillClause>)? |
| GroupByClause : LPAREN <TimeInterval> COMMA <TimeUnit> RPAREN |
| GROUPBYFillClause : LPAREN <TypeClause> RPAREN |
| TypeClause : <AllClause> | <Int32Clause> | <Int64Clause> | <FloatClause> | <DoubleClause> | <BoolClause> | <TextClause> |
| AllClause: ALL LBRACKET (<PreviousUntilLastClause> | <PreviousClause>) RBRACKET |
| Int32Clause: INT32 LBRACKET (<PreviousUntilLastClause> | <PreviousClause>) RBRACKET |
| Int64Clause: INT64 LBRACKET (<PreviousUntilLastClause> | <PreviousClause>) RBRACKET |
| FloatClause: FLOAT LBRACKET (<PreviousUntilLastClause> | <PreviousClause>) RBRACKET |
| DoubleClause: DOUBLE LBRACKET (<PreviousUntilLastClause> | <PreviousClause>) RBRACKET |
| BoolClause: BOOLEAN LBRACKET (<PreviousUntilLastClause> | <PreviousClause>) RBRACKET |
| TextClause: TEXT LBRACKET (<PreviousUntilLastClause> | <PreviousClause>) RBRACKET |
| PreviousClause : PREVIOUS |
| PreviousUntilLastClause : PREVIOUSUNTILLAST |
| Eg: SELECT last_value(temperature) FROM root.ln.wf01.wt01 GROUP BY([20, 100), 5m) FILL (float[PREVIOUS]) |
| Eg: SELECT last_value(temperature) FROM root.ln.wf01.wt01 GROUP BY((15, 100], 5m) FILL (float[PREVIOUS]) |
| Eg: SELECT last_value(power) FROM root.ln.wf01.wt01 GROUP BY([20, 100), 5m) FILL (int32[PREVIOUSUNTILLAST]) |
| Eg: SELECT last_value(power) FROM root.ln.wf01.wt01 GROUP BY([20, 100), 5m) FILL (int32[PREVIOUSUNTILLAST, 5m]) |
| Eg: SELECT last_value(temperature), last_value(power) FROM root.ln.wf01.wt01 GROUP BY([20, 100), 5m) FILL (ALL[PREVIOUS]) |
| Eg: SELECT last_value(temperature), last_value(power) FROM root.ln.wf01.wt01 GROUP BY([20, 100), 5m) FILL (ALL[PREVIOUS, 5m]) |
| Note: In group by fill, sliding step is not supported in group by clause |
| Note: Now, only last_value aggregation function is supported in group by fill. |
| Note: Linear fill is not supported in group by fill. |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br></div></div><ul><li>Order by time 语句</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SELECT <SelectClause> FROM <FromClause> WHERE <WhereClause> GROUP BY <GroupByClause> (FILL <GROUPBYFillClause>)? orderByTimeClause? |
| orderByTimeClause: order by time (asc | desc)? |
| |
| Eg: SELECT last_value(temperature) FROM root.ln.wf01.wt01 GROUP BY([20, 100), 5m) FILL (float[PREVIOUS]) order by time desc |
| Eg: SELECT * from root.** order by time desc |
| Eg: SELECT * from root.** order by time desc align by device |
| Eg: SELECT * from root.** order by time desc disable align |
| Eg: SELECT last * from root order by time desc |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br></div></div><ul><li>Limit & SLimit 语句</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SELECT <SelectClause> FROM <FromClause> [WHERE <WhereClause>] [<LIMITClause>] [<SLIMITClause>] |
| SelectClause : [<Path> | Function]+ |
| Function : <AggregationFunction> LPAREN <Path> RPAREN |
| FromClause : <Path> |
| WhereClause : <Condition> [(AND | OR) <Condition>]* |
| Condition : <Expression> [(AND | OR) <Expression>]* |
| Expression: [NOT|!]?<TimeExpr> | [NOT|!]?<SensorExpr> |
| TimeExpr : TIME PrecedenceEqualOperator (<TimeValue> | <RelativeTime>) |
| RelativeTimeDurationUnit = Integer ('Y'|'MO'|'W'|'D'|'H'|'M'|'S'|'MS'|'US'|'NS') |
| RelativeTime : (now() | <TimeValue>) [(+|-) RelativeTimeDurationUnit]+ |
| SensorExpr : (<Timeseries>|<Path>) PrecedenceEqualOperator <PointValue> |
| LIMITClause : LIMIT <N> [OFFSETClause]? |
| N : Integer |
| OFFSETClause : OFFSET <OFFSETValue> |
| OFFSETValue : Integer |
| SLIMITClause : SLIMIT <SN> [SOFFSETClause]? |
| SN : Integer |
| SOFFSETClause : SOFFSET <SOFFSETValue> |
| SOFFSETValue : Integer |
| Eg: IoTDB > SELECT status, temperature FROM root.ln.wf01.wt01 WHERE temperature < 24 and time > 2017-11-01 00:13:00 LIMIT 3 OFFSET 2 |
| Eg. IoTDB > SELECT COUNT (status), MAX_VALUE(temperature) FROM root.ln.wf01.wt01 WHERE time < 1509466500000 GROUP BY([1509465720000, 1509466380000), 5m) LIMIT 3 |
| Note: N, OFFSETValue, SN and SOFFSETValue must be greater than 0. |
| Note: The order of <LIMITClause> and <SLIMITClause> does not affect the grammatical correctness. |
| Note: <FillClause> can not use <LIMITClause> but not <SLIMITClause>. |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br></div></div><ul><li>Align by device 语句</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>AlignbyDeviceClause : ALIGN BY DEVICE |
| |
| 规则： |
| 1. 大小写不敏感。 |
| 正例：select * from root.sg1.** align by device |
| 正例：select * from root.sg1.** ALIGN BY DEVICE |
| |
| 2. AlignbyDeviceClause 只能放在末尾。 |
| 正例：select * from root.sg1.** where time > 10 align by device |
| 错例：select * from root.sg1.** align by device where time > 10 |
| |
| 3. Select 子句中的 path 只能是单层，或者通配符，不允许有 path 分隔符"."。 |
| 正例：select s0,s1 from root.sg1.* align by device |
| 正例：select s0,s1 from root.sg1.d0, root.sg1.d1 align by device |
| 正例：select * from root.sg1.* align by device |
| 正例：select * from root.** align by device |
| 正例：select s0,s1,* from root.*.* align by device |
| 错例：select d0.s1, d0.s2, d1.s0 from root.sg1 align by device |
| 错例：select *.s0, *.s1 from root.* align by device |
| 错例：select *.*.* from root align by device |
| |
| 4. 相同 measurement 的各设备的数据类型必须都相同， |
| |
| 正例：select s0 from root.sg1.d0,root.sg1.d1 align by device |
| root.sg1.d0.s0 and root.sg1.d1.s0 are both INT32. |
| |
| 正例：select count(s0) from root.sg1.d0,root.sg1.d1 align by device |
| count(root.sg1.d0.s0) and count(root.sg1.d1.s0) are both INT64. |
| |
| 错例：select s0 from root.sg1.d0, root.sg2.d3 align by device |
| root.sg1.d0.s0 is INT32 while root.sg2.d3.s0 is FLOAT. |
| |
| 5. 结果集的展示规则：对于 select 中给出的列，不论是否有数据（是否被注册），均会被显示。此外，select 子句中还支持常数列（例如，'a', '123'等等）。 |
| 例如，"select s0,s1,s2,'abc',s1,s2 from root.sg.d0, root.sg.d1, root.sg.d2 align by device". 假设只有下述三列有数据： |
| - root.sg.d0.s0 |
| - root.sg.d0.s1 |
| - root.sg.d1.s0 |
| |
| 结果集形如： |
| |
| | Time | Device | s0 | s1 | s2 | 'abc' | s1 | s2 | |
| | --- | --- | ---| ---| null | 'abc' | ---| null | |
| | 1 |root.sg.d0| 20 | 2.5| null | 'abc' | 2.5| null | |
| | 2 |root.sg.d0| 23 | 3.1| null | 'abc' | 3.1| null | |
| | ... | ... | ...| ...| null | 'abc' | ...| null | |
| | 1 |root.sg.d1| 12 |null| null | 'abc' |null| null | |
| | 2 |root.sg.d1| 19 |null| null | 'abc' |null| null | |
| | ... | ... | ...| ...| null | 'abc' | ...| null | |
| |
| 注意注意 设备'root.sg.d1'的's0'的值全为 null |
| |
| 6. 在 From 中重复写设备名字或者设备前缀是没有任何作用的。 |
| 例如，"select s0,s1 from root.sg.d0,root.sg.d0,root.sg.d1 align by device" 等于 "select s0,s1 from root.sg.d0,root.sg.d1 align by device". |
| 例如。"select s0,s1 from root.sg.*,root.sg.d0 align by device" 等于 "select s0,s1 from root.sg.* align by device". |
| |
| 7. 在 Select 子句中重复写列名是生效的。例如，"select s0,s0,s1 from root.sg.* align by device" 不等于 "select s0,s1 from root.sg.* align by device". |
| |
| 8. 在 Where 子句中时间过滤条件和值过滤条件均可以使用，值过滤条件可以使用叶子节点 path，或以 root 开头的整个 path，不允许存在通配符。例如， |
| - select * from root.sg.* where time = 1 align by device |
| - select * from root.sg.* where s0 < 100 align by device |
| - select * from root.sg.* where time < 20 AND s0 > 50 align by device |
| - select * from root.sg.d0 where root.sg.d0.s0 = 15 align by device |
| |
| 9. 更多正例： |
| - select * from root.vehicle.* align by device |
| - select s0,s0,s1 from root.vehicle.* align by device |
| - select s0,s1 from root.vehicle.* limit 10 offset 1 align by device |
| - select * from root.vehicle.* slimit 10 soffset 2 align by device |
| - select * from root.vehicle.* where time > 10 align by device |
| - select * from root.vehicle.* where time < 10 AND s0 > 25 align by device |
| - select * from root.vehicle.* where root.vehicle.d0.s0>0 align by device |
| - select count(*) from root.vehicle.* align by device |
| - select sum(*) from root.vehicle.* GROUP BY (20ms,0,[2,50]) align by device |
| - select * from root.vehicle.* where time = 3 Fill(int32[previous, 5ms]) align by device |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br><span class="line-number">25</span><br><span class="line-number">26</span><br><span class="line-number">27</span><br><span class="line-number">28</span><br><span class="line-number">29</span><br><span class="line-number">30</span><br><span class="line-number">31</span><br><span class="line-number">32</span><br><span class="line-number">33</span><br><span class="line-number">34</span><br><span class="line-number">35</span><br><span class="line-number">36</span><br><span class="line-number">37</span><br><span class="line-number">38</span><br><span class="line-number">39</span><br><span class="line-number">40</span><br><span class="line-number">41</span><br><span class="line-number">42</span><br><span class="line-number">43</span><br><span class="line-number">44</span><br><span class="line-number">45</span><br><span class="line-number">46</span><br><span class="line-number">47</span><br><span class="line-number">48</span><br><span class="line-number">49</span><br><span class="line-number">50</span><br><span class="line-number">51</span><br><span class="line-number">52</span><br><span class="line-number">53</span><br><span class="line-number">54</span><br><span class="line-number">55</span><br><span class="line-number">56</span><br><span class="line-number">57</span><br><span class="line-number">58</span><br><span class="line-number">59</span><br><span class="line-number">60</span><br><span class="line-number">61</span><br><span class="line-number">62</span><br><span class="line-number">63</span><br><span class="line-number">64</span><br><span class="line-number">65</span><br><span class="line-number">66</span><br><span class="line-number">67</span><br><span class="line-number">68</span><br><span class="line-number">69</span><br><span class="line-number">70</span><br><span class="line-number">71</span><br><span class="line-number">72</span><br><span class="line-number">73</span><br><span class="line-number">74</span><br></div></div><ul><li>Disable align 语句</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>规则： |
| 1. 大小写均可。 |
| 正例：select * from root.sg1.* disable align |
| 正例：select * from root.sg1.* DISABLE ALIGN |
| |
| 2. Disable Align 只能用于查询语句句尾。 |
| 正例：select * from root.sg1.* where time > 10 disable align |
| 错例：select * from root.sg1.* disable align where time > 10 |
| |
| 3. Disable Align 不能用于聚合查询、Fill 语句、Group by 或 Group by device 语句，但可用于 Limit 语句。 |
| 正例：select * from root.sg1.* limit 3 offset 2 disable align |
| 正例：select * from root.sg1.* slimit 3 soffset 2 disable align |
| 错例：select count(s0),count(s1) from root.sg1.d1 disable align |
| 错例：select * from root.vehicle.* where root.vehicle.d0.s0>0 disable align |
| 错例：select * from root.vehicle.* align by device disable align |
| |
| 4. 结果显示若无数据显示为空白。 |
| |
| 查询结果样式如下表： |
| | Time | root.sg.d0.s1 | Time | root.sg.d0.s2 | Time | root.sg.d1.s1 | |
| | --- | --- | --- | --- | --- | --- | |
| | 1 | 100 | 20 | 300 | 400 | 600 | |
| | 2 | 300 | 40 | 800 | 700 | 900 | |
| | 4 | 500 | | | 800 | 1000 | |
| | | | | | 900 | 8000 | |
| |
| 5. 一些正确使用样例： |
| - select * from root.vehicle.* disable align |
| - select s0,s0,s1 from root.vehicle.* disable align |
| - select s0,s1 from root.vehicle.* limit 10 offset 1 disable align |
| - select * from root.vehicle.* slimit 10 soffset 2 disable align |
| - select * from root.vehicle.* where time > 10 disable align |
| |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br><span class="line-number">25</span><br><span class="line-number">26</span><br><span class="line-number">27</span><br><span class="line-number">28</span><br><span class="line-number">29</span><br><span class="line-number">30</span><br><span class="line-number">31</span><br><span class="line-number">32</span><br><span class="line-number">33</span><br></div></div><ul><li>Last 语句</li></ul> <p>Last 语句返回所要查询时间序列的最近时间戳的一条数据</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>SELECT LAST <SelectClause> FROM <FromClause> WHERE <WhereClause> |
| Select Clause : <Path> [COMMA <Path>]* |
| FromClause : < PrefixPath > [COMMA < PrefixPath >]* |
| WhereClause : <TimeExpr> [(AND | OR) <TimeExpr>]* |
| TimeExpr : TIME PrecedenceEqualOperator (<TimeValue> | <RelativeTime>) |
| |
| Eg. SELECT LAST s1 FROM root.sg.d1 |
| Eg. SELECT LAST s1, s2 FROM root.sg.d1 |
| Eg. SELECT LAST s1 FROM root.sg.d1, root.sg.d2 |
| Eg. SELECT LAST s1 FROM root.sg.d1 where time > 100 |
| Eg. SELECT LAST s1, s2 FROM root.sg.d1 where time >= 500 |
| |
| 规则： |
| 1. 需要满足 PrefixPath.Path 为一条完整的时间序列，即 <PrefixPath> + <Path> = <Timeseries> |
| |
| 2. 当前 SELECT LAST 语句只支持包含'>'或'>='的时间过滤条件 |
| |
| 3. 结果集以四列的表格的固定形式返回。 |
| 例如 "select last s1, s2 from root.sg.d1, root.sg.d2", 结果集返回如下： |
| |
| | Time | timeseries | value | dataType | |
| | --- | ------------- | ----- | -------- | |
| | 5 | root.sg.d1.s1 | 100 | INT32 | |
| | 2 | root.sg.d1.s2 | 400 | INT32 | |
| | 4 | root.sg.d2.s1 | 250 | INT32 | |
| | 9 | root.sg.d2.s2 | 600 | INT32 | |
| |
| 4. 注意 LAST 语句不支持与"disable align"关键词一起使用。 |
| |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br><span class="line-number">25</span><br><span class="line-number">26</span><br><span class="line-number">27</span><br><span class="line-number">28</span><br><span class="line-number">29</span><br></div></div><ul><li>As 语句</li></ul> <p>As 语句为 SELECT 语句中出现的时间序列规定一个别名</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>在每个查询中都可以使用 As 语句来规定时间序列的别名，但是对于通配符的使用有一定限制。 |
| |
| 1. 原始数据查询： |
| select s1 as speed, s2 as temperature from root.sg.d1 |
| |
| 结果集将显示为： |
| | Time | speed | temperature | |
| | ... | ... | .... | |
| |
| 2. 聚合查询 |
| select count(s1) as s1_num, max_value(s2) as s2_max from root.sg.d1 |
| |
| 3. 降频聚合查询 |
| select count(s1) as s1_num from root.sg.d1 group by ([100,500), 80ms) |
| |
| 4. 按设备对齐查询 |
| select s1 as speed, s2 as temperature from root.sg.d1 align by device |
| |
| select count(s1) as s1_num, count(s2), count(s3) as s3_num from root.sg.d2 align by device |
| |
| 5. 最新数据查询 |
| select last s1 as speed, s2 from root.sg.d1 |
| |
| 规则： |
| 1. 除按设备对齐查询外，每一个 AS 语句必须唯一对应一个时间序列。 |
| |
| E.g. select s1 as temperature from root.sg.* |
| |
| 此时如果存储组 root.sg.* 中含有多个设备，则会抛出异常。 |
| |
| 2. 按设备对齐查询中，每个 AS 语句对应的前缀路径可以含多个设备，而后缀路径不能含多个传感器。 |
| |
| E.g. select s1 as temperature from root.sg.* |
| |
| 这种情况即使有多个设备，也可以正常显示。 |
| |
| E.g. select * as temperature from root.sg.d1 |
| |
| 这种情况如果 * 匹配多个传感器，则无法正常显示。 |
| |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br><span class="line-number">25</span><br><span class="line-number">26</span><br><span class="line-number">27</span><br><span class="line-number">28</span><br><span class="line-number">29</span><br><span class="line-number">30</span><br><span class="line-number">31</span><br><span class="line-number">32</span><br><span class="line-number">33</span><br><span class="line-number">34</span><br><span class="line-number">35</span><br><span class="line-number">36</span><br><span class="line-number">37</span><br><span class="line-number">38</span><br><span class="line-number">39</span><br><span class="line-number">40</span><br></div></div><ul><li>Regexp 语句</li></ul> <p>Regexp语句仅支持数据类型为 TEXT的列进行过滤，传入的过滤条件为 Java 标准库风格的正则表达式</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>SELECT <SelectClause> FROM <FromClause> WHERE <WhereClause> |
| Select Clause : <Path> [COMMA <Path>]* |
| FromClause : < PrefixPath > [COMMA < PrefixPath >]* |
| WhereClause : andExpression (OPERATOR_OR andExpression)* |
| andExpression : predicate (OPERATOR_AND predicate)* |
| predicate : (suffixPath | fullPath) REGEXP regularExpression |
| regularExpression: Java standard regularexpression, like '^[a-z][0-9]$', [details](https://docs.oracle.com/javase/7/docs/api/java/util/regex/Pattern.html) |
| |
| Eg. select s1 from root.sg.d1 where s1 regexp '^[0-9]*$' |
| Eg. select s1, s2 FROM root.sg.d1 where s1 regexp '^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$' and s2 regexp '^\d{15}|\d{18}$' |
| Eg. select * from root.sg.d1 where s1 regexp '^[a-zA-Z]\w{5,17}$' |
| Eg. select * from root.sg.d1 where s1 regexp '^\d{4}-\d{1,2}-\d{1,2}' and time > 100 |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br></div></div><ul><li>Like 语句</li></ul> <p>Like语句的用法和mysql相同, 但是仅支持对数据类型为 TEXT的列进行过滤</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>SELECT <SelectClause> FROM <FromClause> WHERE <WhereClause> |
| Select Clause : <Path> [COMMA <Path>]* |
| FromClause : < PrefixPath > [COMMA < PrefixPath >]* |
| WhereClause : andExpression (OPERATOR_OR andExpression)* |
| andExpression : predicate (OPERATOR_AND predicate)* |
| predicate : (suffixPath | fullPath) LIKE likeExpression |
| likeExpression : string that may contains "%" or "_", while "%value" means a string that ends with the value, "value%" means a string starts with the value, "%value%" means string that contains values, and "_" represents any character. |
| |
| Eg. select s1 from root.sg.d1 where s1 like 'abc' |
| Eg. select s1, s2 from root.sg.d1 where s1 like 'abc%' |
| Eg. select * from root.sg.d1 where s1 like 'abc_' |
| Eg. select * from root.sg.d1 where s1 like 'abc\%' |
| 这种情况，'\%'表示'%'将会被转义 |
| 结果集将显示为： |
| | Time | Path | Value | |
| | --- | ------------ | ----- | |
| | 200 | root.sg.d1.s1| abc% | |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br></div></div><h2 id="数据库管理语句"><a href="#数据库管理语句" class="header-anchor">#</a> 数据库管理语句</h2> <ul><li>创建用户</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>CREATE USER <userName> <password>; |
| userName:=identifier |
| password:=string |
| Eg: IoTDB > CREATE USER thulab 'passwd'; |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br></div></div><ul><li>删除用户</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>DROP USER <userName>; |
| userName:=identifier |
| Eg: IoTDB > DROP USER xiaoming; |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><ul><li>创建角色</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>CREATE ROLE <roleName>; |
| roleName:=identifie |
| Eg: IoTDB > CREATE ROLE admin; |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><ul><li>删除角色</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>DROP ROLE <roleName>; |
| roleName:=identifier |
| Eg: IoTDB > DROP ROLE admin; |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><ul><li>赋予用户权限</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>GRANT USER <userName> PRIVILEGES <privileges> ON <nodeName>; |
| userName:=identifier |
| nodeName:=identifier (DOT identifier)* |
| privileges:= string (COMMA string)* |
| Eg: IoTDB > GRANT USER tempuser PRIVILEGES DELETE_TIMESERIES on root.ln; |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br></div></div><ul><li>赋予角色权限</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>GRANT ROLE <roleName> PRIVILEGES <privileges> ON <nodeName>; |
| privileges:= string (COMMA string)* |
| roleName:=identifier |
| nodeName:=identifier (DOT identifier)* |
| Eg: IoTDB > GRANT ROLE temprole PRIVILEGES DELETE_TIMESERIES ON root.ln; |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br></div></div><ul><li>赋予用户角色</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>GRANT <roleName> TO <userName>; |
| roleName:=identifier |
| userName:=identifier |
| Eg: IoTDB > GRANT temprole TO tempuser; |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br></div></div><ul><li>撤销用户权限</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>REVOKE USER <userName> PRIVILEGES <privileges> ON <nodeName>; |
| privileges:= string (COMMA string)* |
| userName:=identifier |
| nodeName:=identifier (DOT identifier)* |
| Eg: IoTDB > REVOKE USER tempuser PRIVILEGES DELETE_TIMESERIES on root.ln; |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br></div></div><ul><li>撤销角色权限</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>REVOKE ROLE <roleName> PRIVILEGES <privileges> ON <nodeName>; |
| privileges:= string (COMMA string)* |
| roleName:= identifier |
| nodeName:=identifier (DOT identifier)* |
| Eg: IoTDB > REVOKE ROLE temprole PRIVILEGES DELETE_TIMESERIES ON root.ln; |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br></div></div><ul><li>撤销用户角色</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>REVOKE <roleName> FROM <userName>; |
| roleName:=identifier |
| userName:=identifier |
| Eg: IoTDB > REVOKE temprole FROM tempuser; |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br></div></div><ul><li>列出用户</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>LIST USER |
| Eg: IoTDB > LIST USER |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br></div></div><ul><li>列出角色</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>LIST ROLE |
| Eg: IoTDB > LIST ROLE |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br></div></div><ul><li>列出权限</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>LIST PRIVILEGES USER <username> ON <path>; |
| username:=identifier |
| path=‘root’ (DOT identifier)* |
| Eg: IoTDB > LIST PRIVILEGES USER sgcc_wirte_user ON root.sgcc; |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br></div></div><ul><li>列出角色权限</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>LIST ROLE PRIVILEGES <roleName> |
| roleName:=identifier |
| Eg: IoTDB > LIST ROLE PRIVILEGES actor; |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><ul><li>列出角色在具体路径上的权限</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>LIST PRIVILEGES ROLE <roleName> ON <path>; |
| roleName:=identifier |
| path=‘root’ (DOT identifier)* |
| Eg: IoTDB > LIST PRIVILEGES ROLE wirte_role ON root.sgcc; |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br></div></div><ul><li>列出用户权限</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>LIST USER PRIVILEGES <username> ; |
| username:=identifier |
| Eg: IoTDB > LIST USER PRIVILEGES tempuser; |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><ul><li>列出用户角色</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>LIST ALL ROLE OF USER <username> ; |
| username:=identifier |
| Eg: IoTDB > LIST ALL ROLE OF USER tempuser; |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><ul><li>列出角色用户</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>LIST ALL USER OF ROLE <roleName>; |
| roleName:=identifier |
| Eg: IoTDB > LIST ALL USER OF ROLE roleuser; |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><ul><li>更新密码</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>ALTER USER <username> SET PASSWORD <password>; |
| roleName:=identifier |
| password:=string |
| Eg: IoTDB > ALTER USER tempuser SET PASSWORD 'newpwd'; |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br></div></div><h2 id="功能"><a href="#功能" class="header-anchor">#</a> 功能</h2> <ul><li>COUNT</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SELECT COUNT(Path) (COMMA COUNT(Path))* FROM <FromClause> [WHERE <WhereClause>]? |
| Eg. SELECT COUNT(status), COUNT(temperature) FROM root.ln.wf01.wt01 WHERE root.ln.wf01.wt01.temperature < 24 |
| Note: the statement needs to satisfy this constraint: <PrefixPath> + <Path> = <Timeseries> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><ul><li>FIRST_VALUE |
| 原有的 <code>FIRST</code> 方法在 <code>v0.10.0</code> 版本更名为 <code>FIRST_VALUE</code>。</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SELECT FIRST_VALUE (Path) (COMMA FIRST_VALUE (Path))* FROM <FromClause> [WHERE <WhereClause>]? |
| Eg. SELECT FIRST_VALUE (status), FIRST_VALUE (temperature) FROM root.ln.wf01.wt01 WHERE root.ln.wf01.wt01.temperature < 24 |
| Note: the statement needs to satisfy this constraint: <PrefixPath> + <Path> = <Timeseries> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><ul><li>LAST_VALUE</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SELECT LAST_VALUE (Path) (COMMA LAST_VALUE (Path))* FROM <FromClause> [WHERE <WhereClause>]? |
| Eg. SELECT LAST_VALUE (status), LAST_VALUE (temperature) FROM root.ln.wf01.wt01 WHERE root.ln.wf01.wt01.temperature < 24 |
| Note: the statement needs to satisfy this constraint: <PrefixPath> + <Path> = <Timeseries> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><ul><li>MAX_TIME</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SELECT MAX_TIME (Path) (COMMA MAX_TIME (Path))* FROM <FromClause> [WHERE <WhereClause>]? |
| Eg. SELECT MAX_TIME(status), MAX_TIME(temperature) FROM root.ln.wf01.wt01 WHERE root.ln.wf01.wt01.temperature < 24 |
| Note: the statement needs to satisfy this constraint: <PrefixPath> + <Path> = <Timeseries> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><ul><li>MAX_VALUE</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SELECT MAX_VALUE (Path) (COMMA MAX_VALUE (Path))* FROM <FromClause> [WHERE <WhereClause>]? |
| Eg. SELECT MAX_VALUE(status), MAX_VALUE(temperature) FROM root.ln.wf01.wt01 WHERE root.ln.wf01.wt01.temperature < 24 |
| Note: the statement needs to satisfy this constraint: <PrefixPath> + <Path> = <Timeseries> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><ul><li>EXTREME |
| 极值：具有最大绝对值的值（正值优先）</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SELECT EXTREME (Path) (COMMA EXT (Path))* FROM <FromClause> [WHERE <WhereClause>]? |
| Eg. SELECT EXTREME(status), EXTREME(temperature) FROM root.ln.wf01.wt01 WHERE root.ln.wf01.wt01.temperature < 24 |
| Note: the statement needs to satisfy this constraint: <PrefixPath> + <Path> = <Timeseries> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><ul><li>AVG |
| 原有的 <code>MEAN</code> 方法在 <code>v0.9.0</code> 版本更名为 <code>AVG</code>。</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SELECT AVG (Path) (COMMA AVG (Path))* FROM <FromClause> [WHERE <WhereClause>]? |
| Eg. SELECT AVG (temperature) FROM root.ln.wf01.wt01 WHERE root.ln.wf01.wt01.temperature < 24 |
| Note: the statement needs to satisfy this constraint: <PrefixPath> + <Path> = <Timeseries> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><ul><li>MIN_TIME</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SELECT MIN_TIME (Path) (COMMA MIN_TIME (Path))*FROM <FromClause> [WHERE <WhereClause>]? |
| Eg. SELECT MIN_TIME(status), MIN_TIME(temperature) FROM root.ln.wf01.wt01 WHERE root.ln.wf01.wt01.temperature < 24 |
| Note: the statement needs to satisfy this constraint: <PrefixPath> + <Path> = <Timeseries> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><ul><li>MIN_VALUE</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SELECT MIN_VALUE (Path) (COMMA MIN_VALUE (Path))* FROM <FromClause> [WHERE <WhereClause>]? |
| Eg. SELECT MIN_VALUE(status),MIN_VALUE(temperature) FROM root.ln.wf01.wt01 WHERE root.ln.wf01.wt01.temperature < 24 |
| Note: the statement needs to satisfy this constraint: <PrefixPath> + <Path> = <Timeseries> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><ul><li>NOW</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>NOW() |
| Eg. INSERT INTO root.ln.wf01.wt01(timestamp,status) VALUES(NOW(), false) |
| Eg. DELETE FROM root.ln.wf01.wt01.status, root.ln.wf01.wt01.temperature WHERE time < NOW() |
| Eg. SELECT * FROM root WHERE time < NOW() |
| Eg. SELECT COUNT(temperature) FROM root.ln.wf01.wt01 WHERE time < NOW() |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br></div></div><ul><li>SUM</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SELECT SUM(Path) (COMMA SUM(Path))* FROM <FromClause> [WHERE <WhereClause>]? |
| Eg. SELECT SUM(temperature) FROM root.ln.wf01.wt01 WHERE root.ln.wf01.wt01.temperature < 24 |
| Note: the statement needs to satisfy this constraint: <PrefixPath> + <Path> = <Timeseries> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><h2 id="ttl"><a href="#ttl" class="header-anchor">#</a> TTL</h2> <p>IoTDB 支持对存储组级别设置数据存活时间（TTL），这使得 IoTDB 可以定期、自动地删除一定时间之前的数据。合理使用 TTL |
| 可以帮助您控制 IoTDB 占用的总磁盘空间以避免出现磁盘写满等异常。并且，随着文件数量的增多，查询性能往往随之下降， |
| 内存占用也会有所提高。及时地删除一些较老的文件有助于使查询性能维持在一个较高的水平和减少内存资源的占用。 |
| IoTDB 中的 TTL 操作可以由以下的语句进行实现：</p> <ul><li>设置 TTL</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SET TTL TO StorageGroupName TTLTime |
| Eg. SET TTL TO root.group1 3600000 |
| 这个例子展示了如何使得 root.group1 这个存储组只保留近一个小时的数据，一个小时前的数据会被删除或者进入不可见状态。 |
| 注意：TTLTime 应是毫秒时间戳。一旦 TTL 被设置，超过 TTL 时间范围的写入将被拒绝。 |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br></div></div><ul><li>取消 TTL</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>UNSET TTL TO StorageGroupName |
| Eg. UNSET TTL TO root.group1 |
| 这个例子展示了如何取消存储组 root.group1 的 TTL，这将使得该存储组接受任意时刻的数据。 |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><ul><li>显示 TTL</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SHOW ALL TTL |
| SHOW TTL ON StorageGroupNames |
| Eg.1 SHOW ALL TTL |
| 这个例子会给出所有存储组的 TTL。 |
| Eg.2 SHOW TTL ON root.group1,root.group2,root.group3 |
| 这个例子会显示指定的三个存储组的 TTL。 |
| 注意：没有设置 TTL 的存储组的 TTL 将显示为 null。 |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br></div></div><p>注意：当您对某个存储组设置 TTL 的时候，超过 TTL 范围的数据将会立即不可见。但由于数据文件可能混合包含处在 TTL 范围内 |
| 与范围外的数据，同时数据文件可能正在接受查询，数据文件的物理删除不会立即进行。如果你在此时取消或者调大 TTL， |
| 一部分之前不可见的数据可能重新可见，而那些已经被物理删除的数据则将永久丢失。也就是说，TTL 操作不会原子性地删除 |
| 对应的数据。因此我们不推荐您频繁修改 TTL，除非您能接受该操作带来的一定程度的不可预知性。</p> <ul><li>删除时间分区 （实验性功能）</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>DELETE PARTITION StorageGroupName INT(COMMA INT)* |
| Eg DELETE PARTITION root.sg1 0,1,2 |
| 该例子将删除存储组 root.sg1 的前三个时间分区 |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><p>partitionId 可以通过查看数据文件夹获取，或者是计算 <code>timestamp / partitionInterval</code>得到。</p> <h2 id="中止查询"><a href="#中止查询" class="header-anchor">#</a> 中止查询</h2> <ul><li>显示正在执行的查询列表</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SHOW QUERY PROCESSLIST |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><ul><li>中止查询</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>KILL QUERY INT? |
| E.g. KILL QUERY |
| E.g. KILL QUERY 2 |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><h2 id="设置系统为只读-可写入模式"><a href="#设置系统为只读-可写入模式" class="header-anchor">#</a> 设置系统为只读/可写入模式</h2> <div class="language- line-numbers-mode"><pre class="language-text"><code>IoTDB> SET SYSTEM TO READONLY |
| IoTDB> SET SYSTEM TO WRITABLE |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br></div></div><h2 id="标识符列表"><a href="#标识符列表" class="header-anchor">#</a> 标识符列表</h2> <div class="language- line-numbers-mode"><pre class="language-text"><code>QUOTE := '\''; |
| DOT := '.'; |
| COLON : ':' ; |
| COMMA := ',' ; |
| SEMICOLON := ';' ; |
| LPAREN := '(' ; |
| RPAREN := ')' ; |
| LBRACKET := '['; |
| RBRACKET := ']'; |
| EQUAL := '=' | '=='; |
| NOTEQUAL := '<>' | '!='; |
| LESSTHANOREQUALTO := '<='; |
| LESSTHAN := '<'; |
| GREATERTHANOREQUALTO := '>='; |
| GREATERTHAN := '>'; |
| DIVIDE := '/'; |
| PLUS := '+'; |
| MINUS := '-'; |
| STAR := '*'; |
| Letter := 'a'..'z' | 'A'..'Z'; |
| HexDigit := 'a'..'f' | 'A'..'F'; |
| Digit := '0'..'9'; |
| Boolean := TRUE | FALSE | 0 | 1 (case insensitive) |
| |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br></div></div><div class="language- line-numbers-mode"><pre class="language-text"><code>StringLiteral := ( '\'' ( ~('\'') )* '\''; |
| eg. 'abc' |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br></div></div><div class="language- line-numbers-mode"><pre class="language-text"><code>Integer := ('-' | '+')? Digit+; |
| eg. 123 |
| eg. -222 |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><div class="language- line-numbers-mode"><pre class="language-text"><code>Float := ('-' | '+')? Digit+ DOT Digit+ (('e' | 'E') ('-' | '+')? Digit+)?; |
| eg. 3.1415 |
| eg. 1.2E10 |
| eg. -1.33 |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br></div></div><div class="language- line-numbers-mode"><pre class="language-text"><code>Identifier := (Letter | '_') (Letter | Digit | '_' | MINUS)*; |
| eg. a123 |
| eg. _abc123 |
| |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br></div></div><h2 id="常量列表"><a href="#常量列表" class="header-anchor">#</a> 常量列表</h2> <div class="language- line-numbers-mode"><pre class="language-text"><code>PointValue : Integer | Float | StringLiteral | Boolean |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><p>TimeValue : Integer | DateTime | ISO8601 | NOW() |
| Note: Integer means timestamp type.</p> <p>DateTime : |
| eg. 2016-11-16T16:22:33+08:00 |
| eg. 2016-11-16 16:22:33+08:00 |
| eg. 2016-11-16T16:22:33.000+08:00 |
| eg. 2016-11-16 16:22:33.000+08:00 |
| Note: DateTime Type can support several types, see Chapter 3 Datetime section for details.</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>PrecedenceEqualOperator : EQUAL | NOTEQUAL | LESSTHANOREQUALTO | LESSTHAN | GREATERTHANOREQUALTO | GREATERTHAN |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><p>Timeseries : ROOT [DOT <LayerName>]* DOT <SensorName> |
| LayerName : Identifier |
| SensorName : Identifier |
| eg. root.ln.wf01.wt01.status |
| eg. root.sgcc.wf03.wt01.temperature |
| Note: Timeseries must be start with <code>root</code>(case insensitive) and end with sensor name.</SensorName></LayerName></p> <div class="language- line-numbers-mode"><pre class="language-text"><code> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><p>PrefixPath : ROOT (DOT <LayerName>)* |
| LayerName : Identifier | STAR |
| eg. root.sgcc |
| eg. root.*</LayerName></p> <div class="language- line-numbers-mode"><pre class="language-text"><code>Path: (ROOT | <LayerName>) (DOT <LayerName>)* |
| LayerName: Identifier | STAR |
| eg. root.ln.wf01.wt01.status |
| eg. root.*.wf01.wt01.status |
| eg. root.ln.wf01.wt01.* |
| eg. *.wt01.* |
| eg. * |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br></div></div></div> <!----> <p style="text-align: center; color: #909399; font-size: 12px; margin: 0 30px;">Copyright © 2022 The Apache Software Foundation.<br> |
| Apache and the Apache feather logo are trademarks of The Apache Software Foundation</p> <p style="text-align: center; margin-top: 10px; color: #909399; font-size: 12px; margin: 0 30px;"><strong>Have a question?</strong> Connect with us on QQ, WeChat, or Slack. <a href="https://github.com/apache/iotdb/issues/1995">Join the community</a> now.</p> <p style="text-align: center; margin-top: 10px; color: #909399; font-size: 12px; margin: 0 30px;"> |
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