| import{_ as t,C as e,O as p,P as o,ah as c,Q as n,U as s,ai as i,aW as u}from"./framework-62ad666a.js";const l={},k=n("h2",{id:"jdbc",tabindex:"-1"},[n("a",{class:"header-anchor",href:"#jdbc","aria-hidden":"true"},"#"),s(" JDBC")],-1),r={href:"https://iotdb.apache.org/UserGuide/Master/API/Programming-Java-Native-API.html",target:"_blank",rel:"noopener noreferrer"},d=u(`<h3 id="dependencies" tabindex="-1"><a class="header-anchor" href="#dependencies" aria-hidden="true">#</a> Dependencies</h3><ul><li>JDK >= 1.8</li><li>Maven >= 3.6</li></ul><h3 id="installation" tabindex="-1"><a class="header-anchor" href="#installation" aria-hidden="true">#</a> Installation</h3><p>In root directory:</p><div class="language-bash line-numbers-mode" data-ext="sh"><pre class="language-bash"><code>mvn clean <span class="token function">install</span> <span class="token parameter variable">-pl</span> jdbc <span class="token parameter variable">-am</span> <span class="token parameter variable">-Dmaven.test.skip</span><span class="token operator">=</span>true |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h3 id="use-iotdb-jdbc-with-maven" tabindex="-1"><a class="header-anchor" href="#use-iotdb-jdbc-with-maven" aria-hidden="true">#</a> Use IoTDB JDBC with Maven</h3><div class="language-xml line-numbers-mode" data-ext="xml"><pre class="language-xml"><code><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>dependencies</span><span class="token punctuation">></span></span> |
| <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>dependency</span><span class="token punctuation">></span></span> |
| <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>groupId</span><span class="token punctuation">></span></span>org.apache.iotdb<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>groupId</span><span class="token punctuation">></span></span> |
| <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>artifactId</span><span class="token punctuation">></span></span>iotdb-jdbc<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>artifactId</span><span class="token punctuation">></span></span> |
| <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>version</span><span class="token punctuation">></span></span>0.12.0<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>version</span><span class="token punctuation">></span></span> |
| <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>dependency</span><span class="token punctuation">></span></span> |
| <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>dependencies</span><span class="token punctuation">></span></span> |
| </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><h3 id="coding-examples" tabindex="-1"><a class="header-anchor" href="#coding-examples" aria-hidden="true">#</a> Coding Examples</h3><p>This chapter provides an example of how to open a database connection, execute a SQL query, and display the results.</p><p>It requires including the packages containing the JDBC classes needed for database programming.</p><p><strong>NOTE: For faster insertion, the insertTablet() in Session is recommended.</strong></p><div class="language-java line-numbers-mode" data-ext="java"><pre class="language-java"><code><span class="token keyword">import</span> <span class="token import"><span class="token namespace">java<span class="token punctuation">.</span>sql<span class="token punctuation">.</span></span><span class="token operator">*</span></span><span class="token punctuation">;</span> |
| <span class="token keyword">import</span> <span class="token import"><span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>iotdb<span class="token punctuation">.</span>jdbc<span class="token punctuation">.</span></span><span class="token class-name">IoTDBSQLException</span></span><span class="token punctuation">;</span> |
| |
| <span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">JDBCExample</span> <span class="token punctuation">{</span> |
| <span class="token doc-comment comment">/** |
| * Before executing a SQL statement with a Statement object, you need to create a Statement object using the createStatement() method of the Connection object. |
| * After creating a Statement object, you can use its execute() method to execute a SQL statement |
| * Finally, remember to close the 'statement' and 'connection' objects by using their close() method |
| * For statements with query results, we can use the getResultSet() method of the Statement object to get the result set. |
| */</span> |
| <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token keyword">throws</span> <span class="token class-name">SQLException</span> <span class="token punctuation">{</span> |
| <span class="token class-name">Connection</span> connection <span class="token operator">=</span> <span class="token function">getConnection</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token keyword">if</span> <span class="token punctuation">(</span>connection <span class="token operator">==</span> <span class="token keyword">null</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> |
| <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"get connection defeat"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token keyword">return</span><span class="token punctuation">;</span> |
| <span class="token punctuation">}</span> |
| <span class="token class-name">Statement</span> statement <span class="token operator">=</span> connection<span class="token punctuation">.</span><span class="token function">createStatement</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token comment">//Create storage group</span> |
| <span class="token keyword">try</span> <span class="token punctuation">{</span> |
| statement<span class="token punctuation">.</span><span class="token function">execute</span><span class="token punctuation">(</span><span class="token string">"SET STORAGE GROUP TO root.demo"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token punctuation">}</span><span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">IoTDBSQLException</span> e<span class="token punctuation">)</span><span class="token punctuation">{</span> |
| <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>e<span class="token punctuation">.</span><span class="token function">getMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token punctuation">}</span> |
| |
| |
| <span class="token comment">//Show storage group</span> |
| statement<span class="token punctuation">.</span><span class="token function">execute</span><span class="token punctuation">(</span><span class="token string">"SHOW STORAGE GROUP"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token function">outputResult</span><span class="token punctuation">(</span>statement<span class="token punctuation">.</span><span class="token function">getResultSet</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| |
| <span class="token comment">//Create time series</span> |
| <span class="token comment">//Different data type has different encoding methods. Here use INT32 as an example</span> |
| <span class="token keyword">try</span> <span class="token punctuation">{</span> |
| statement<span class="token punctuation">.</span><span class="token function">execute</span><span class="token punctuation">(</span><span class="token string">"CREATE TIMESERIES root.demo.s0 WITH DATATYPE=INT32,ENCODING=RLE;"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token punctuation">}</span><span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">IoTDBSQLException</span> e<span class="token punctuation">)</span><span class="token punctuation">{</span> |
| <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>e<span class="token punctuation">.</span><span class="token function">getMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token punctuation">}</span> |
| <span class="token comment">//Show time series</span> |
| statement<span class="token punctuation">.</span><span class="token function">execute</span><span class="token punctuation">(</span><span class="token string">"SHOW TIMESERIES root.demo"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token function">outputResult</span><span class="token punctuation">(</span>statement<span class="token punctuation">.</span><span class="token function">getResultSet</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token comment">//Show devices</span> |
| statement<span class="token punctuation">.</span><span class="token function">execute</span><span class="token punctuation">(</span><span class="token string">"SHOW DEVICES"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token function">outputResult</span><span class="token punctuation">(</span>statement<span class="token punctuation">.</span><span class="token function">getResultSet</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token comment">//Count time series</span> |
| statement<span class="token punctuation">.</span><span class="token function">execute</span><span class="token punctuation">(</span><span class="token string">"COUNT TIMESERIES root"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token function">outputResult</span><span class="token punctuation">(</span>statement<span class="token punctuation">.</span><span class="token function">getResultSet</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token comment">//Count nodes at the given level</span> |
| statement<span class="token punctuation">.</span><span class="token function">execute</span><span class="token punctuation">(</span><span class="token string">"COUNT NODES root LEVEL=3"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token function">outputResult</span><span class="token punctuation">(</span>statement<span class="token punctuation">.</span><span class="token function">getResultSet</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token comment">//Count timeseries group by each node at the given level</span> |
| statement<span class="token punctuation">.</span><span class="token function">execute</span><span class="token punctuation">(</span><span class="token string">"COUNT TIMESERIES root GROUP BY LEVEL=3"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token function">outputResult</span><span class="token punctuation">(</span>statement<span class="token punctuation">.</span><span class="token function">getResultSet</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| |
| |
| <span class="token comment">//Execute insert statements in batch</span> |
| statement<span class="token punctuation">.</span><span class="token function">addBatch</span><span class="token punctuation">(</span><span class="token string">"insert into root.demo(timestamp,s0) values(1,1);"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| statement<span class="token punctuation">.</span><span class="token function">addBatch</span><span class="token punctuation">(</span><span class="token string">"insert into root.demo(timestamp,s0) values(1,1);"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| statement<span class="token punctuation">.</span><span class="token function">addBatch</span><span class="token punctuation">(</span><span class="token string">"insert into root.demo(timestamp,s0) values(2,15);"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| statement<span class="token punctuation">.</span><span class="token function">addBatch</span><span class="token punctuation">(</span><span class="token string">"insert into root.demo(timestamp,s0) values(2,17);"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| statement<span class="token punctuation">.</span><span class="token function">addBatch</span><span class="token punctuation">(</span><span class="token string">"insert into root.demo(timestamp,s0) values(4,12);"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| statement<span class="token punctuation">.</span><span class="token function">executeBatch</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| statement<span class="token punctuation">.</span><span class="token function">clearBatch</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| |
| <span class="token comment">//Full query statement</span> |
| <span class="token class-name">String</span> sql <span class="token operator">=</span> <span class="token string">"select * from root.demo"</span><span class="token punctuation">;</span> |
| <span class="token class-name">ResultSet</span> resultSet <span class="token operator">=</span> statement<span class="token punctuation">.</span><span class="token function">executeQuery</span><span class="token punctuation">(</span>sql<span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"sql: "</span> <span class="token operator">+</span> sql<span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token function">outputResult</span><span class="token punctuation">(</span>resultSet<span class="token punctuation">)</span><span class="token punctuation">;</span> |
| |
| <span class="token comment">//Exact query statement</span> |
| sql <span class="token operator">=</span> <span class="token string">"select s0 from root.demo where time = 4;"</span><span class="token punctuation">;</span> |
| resultSet<span class="token operator">=</span> statement<span class="token punctuation">.</span><span class="token function">executeQuery</span><span class="token punctuation">(</span>sql<span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"sql: "</span> <span class="token operator">+</span> sql<span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token function">outputResult</span><span class="token punctuation">(</span>resultSet<span class="token punctuation">)</span><span class="token punctuation">;</span> |
| |
| <span class="token comment">//Time range query</span> |
| sql <span class="token operator">=</span> <span class="token string">"select s0 from root.demo where time >= 2 and time < 5;"</span><span class="token punctuation">;</span> |
| resultSet <span class="token operator">=</span> statement<span class="token punctuation">.</span><span class="token function">executeQuery</span><span class="token punctuation">(</span>sql<span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"sql: "</span> <span class="token operator">+</span> sql<span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token function">outputResult</span><span class="token punctuation">(</span>resultSet<span class="token punctuation">)</span><span class="token punctuation">;</span> |
| |
| <span class="token comment">//Aggregate query</span> |
| sql <span class="token operator">=</span> <span class="token string">"select count(s0) from root.demo;"</span><span class="token punctuation">;</span> |
| resultSet <span class="token operator">=</span> statement<span class="token punctuation">.</span><span class="token function">executeQuery</span><span class="token punctuation">(</span>sql<span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"sql: "</span> <span class="token operator">+</span> sql<span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token function">outputResult</span><span class="token punctuation">(</span>resultSet<span class="token punctuation">)</span><span class="token punctuation">;</span> |
| |
| <span class="token comment">//Delete time series</span> |
| statement<span class="token punctuation">.</span><span class="token function">execute</span><span class="token punctuation">(</span><span class="token string">"delete timeseries root.demo.s0"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| |
| <span class="token comment">//close connection</span> |
| statement<span class="token punctuation">.</span><span class="token function">close</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| connection<span class="token punctuation">.</span><span class="token function">close</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token punctuation">}</span> |
| |
| <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token class-name">Connection</span> <span class="token function">getConnection</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> |
| <span class="token comment">// JDBC driver name and database URL</span> |
| <span class="token class-name">String</span> driver <span class="token operator">=</span> <span class="token string">"org.apache.iotdb.jdbc.IoTDBDriver"</span><span class="token punctuation">;</span> |
| <span class="token class-name">String</span> url <span class="token operator">=</span> <span class="token string">"jdbc:iotdb://127.0.0.1:6667/"</span><span class="token punctuation">;</span> |
| <span class="token comment">// set rpc compress mode</span> |
| <span class="token comment">// String url = "jdbc:iotdb://127.0.0.1:6667?rpc_compress=true";</span> |
| |
| <span class="token comment">// Database credentials</span> |
| <span class="token class-name">String</span> username <span class="token operator">=</span> <span class="token string">"root"</span><span class="token punctuation">;</span> |
| <span class="token class-name">String</span> password <span class="token operator">=</span> <span class="token string">"root"</span><span class="token punctuation">;</span> |
| |
| <span class="token class-name">Connection</span> connection <span class="token operator">=</span> <span class="token keyword">null</span><span class="token punctuation">;</span> |
| <span class="token keyword">try</span> <span class="token punctuation">{</span> |
| <span class="token class-name">Class</span><span class="token punctuation">.</span><span class="token function">forName</span><span class="token punctuation">(</span>driver<span class="token punctuation">)</span><span class="token punctuation">;</span> |
| connection <span class="token operator">=</span> <span class="token class-name">DriverManager</span><span class="token punctuation">.</span><span class="token function">getConnection</span><span class="token punctuation">(</span>url<span class="token punctuation">,</span> username<span class="token punctuation">,</span> password<span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">ClassNotFoundException</span> e<span class="token punctuation">)</span> <span class="token punctuation">{</span> |
| e<span class="token punctuation">.</span><span class="token function">printStackTrace</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">SQLException</span> e<span class="token punctuation">)</span> <span class="token punctuation">{</span> |
| e<span class="token punctuation">.</span><span class="token function">printStackTrace</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token punctuation">}</span> |
| <span class="token keyword">return</span> connection<span class="token punctuation">;</span> |
| <span class="token punctuation">}</span> |
| |
| <span class="token doc-comment comment">/** |
| * This is an example of outputting the results in the ResultSet |
| */</span> |
| <span class="token keyword">private</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">outputResult</span><span class="token punctuation">(</span><span class="token class-name">ResultSet</span> resultSet<span class="token punctuation">)</span> <span class="token keyword">throws</span> <span class="token class-name">SQLException</span> <span class="token punctuation">{</span> |
| <span class="token keyword">if</span> <span class="token punctuation">(</span>resultSet <span class="token operator">!=</span> <span class="token keyword">null</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> |
| <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"--------------------------"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token keyword">final</span> <span class="token class-name">ResultSetMetaData</span> metaData <span class="token operator">=</span> resultSet<span class="token punctuation">.</span><span class="token function">getMetaData</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token keyword">final</span> <span class="token keyword">int</span> columnCount <span class="token operator">=</span> metaData<span class="token punctuation">.</span><span class="token function">getColumnCount</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">int</span> i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> i <span class="token operator"><</span> columnCount<span class="token punctuation">;</span> i<span class="token operator">++</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> |
| <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">print</span><span class="token punctuation">(</span>metaData<span class="token punctuation">.</span><span class="token function">getColumnLabel</span><span class="token punctuation">(</span>i <span class="token operator">+</span> <span class="token number">1</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">" "</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token punctuation">}</span> |
| <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token keyword">while</span> <span class="token punctuation">(</span>resultSet<span class="token punctuation">.</span><span class="token function">next</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> |
| <span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">int</span> i <span class="token operator">=</span> <span class="token number">1</span><span class="token punctuation">;</span> <span class="token punctuation">;</span> i<span class="token operator">++</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> |
| <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">print</span><span class="token punctuation">(</span>resultSet<span class="token punctuation">.</span><span class="token function">getString</span><span class="token punctuation">(</span>i<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token keyword">if</span> <span class="token punctuation">(</span>i <span class="token operator"><</span> columnCount<span class="token punctuation">)</span> <span class="token punctuation">{</span> |
| <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">print</span><span class="token punctuation">(</span><span class="token string">", "</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token punctuation">}</span> <span class="token keyword">else</span> <span class="token punctuation">{</span> |
| <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token keyword">break</span><span class="token punctuation">;</span> |
| <span class="token punctuation">}</span> |
| <span class="token punctuation">}</span> |
| <span class="token punctuation">}</span> |
| <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"--------------------------\\n"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token punctuation">}</span> |
| <span class="token punctuation">}</span> |
| <span class="token punctuation">}</span> |
| </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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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><p>The parameter <code>version</code> can be used in the url:</p><div class="language-java line-numbers-mode" data-ext="java"><pre class="language-java"><code><span class="token class-name">String</span> url <span class="token operator">=</span> <span class="token string">"jdbc:iotdb://127.0.0.1:6667?version=V_0_12"</span><span class="token punctuation">;</span> |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>The parameter <code>version</code> represents the SQL semantic version used by the client, which is used to be compatible with the SQL semantics of 0.12 when upgrading 0.13. The possible values are: <code>V_0_12</code>, <code>V_0_13</code>.</p>`,15);function m(v,b){const a=e("ExternalLinkIcon");return p(),o("div",null,[c(` |
| |
| Licensed to the Apache Software Foundation (ASF) under one |
| or more contributor license agreements. See the NOTICE file |
| distributed with this work for additional information |
| regarding copyright ownership. The ASF licenses this file |
| to you under the Apache License, Version 2.0 (the |
| "License"); you may not use this file except in compliance |
| with the License. You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, |
| software distributed under the License is distributed on an |
| "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| KIND, either express or implied. See the License for the |
| specific language governing permissions and limitations |
| under the License. |
| |
| `),k,n("p",null,[n("em",null,[s("NOTICE: CURRENTLY, JDBC IS USED FOR CONNECTING SOME THIRD-PART TOOLS. IT CAN NOT PROVIDE HIGH THROUGHPUT FOR WRITE OPERATIONS. PLEASE USE "),n("a",r,[s("JAVA NATIVE API"),i(a)]),s(" INSTEAD")])]),d])}const h=t(l,[["render",m],["__file","Programming-JDBC.html.vue"]]);export{h as default}; |
