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class="title">Cluster</span><span class="arrow end"></span></button><!----></section></li><li><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">FAQ</span><span class="arrow end"></span></button><!----></section></li><li><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">Reference</span><span class="arrow end"></span></button><!----></section></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->String Processing</h1><div class="page-info"><!----><!----><!----><!----><span class="page-reading-time-info" aria-label="Reading Time"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewBox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>About 10 min</span><meta property="timeRequired" content="PT10M"></span><!----><!----></div><hr></div><div class="toc-place-holder"><aside id="toc"><!--[--><!----><!--]--><div class="toc-header">On This Page<button class="print-button" title="Print"><svg xmlns="http://www.w3.org/2000/svg" class="icon print-icon" viewBox="0 0 1024 1024" fill="currentColor" aria-label="print icon"><path d="M819.2 364.8h-44.8V128c0-17.067-14.933-32-32-32H281.6c-17.067 0-32 14.933-32 32v236.8h-44.8C145.067 364.8 96 413.867 96 473.6v192c0 59.733 49.067 108.8 108.8 108.8h44.8V896c0 17.067 14.933 32 32 32h460.8c17.067 0 32-14.933 32-32V774.4h44.8c59.733 0 108.8-49.067 108.8-108.8v-192c0-59.733-49.067-108.8-108.8-108.8zM313.6 160h396.8v204.8H313.6V160zm396.8 704H313.6V620.8h396.8V864zM864 665.6c0 25.6-19.2 44.8-44.8 44.8h-44.8V588.8c0-17.067-14.933-32-32-32H281.6c-17.067 0-32 14.933-32 32v121.6h-44.8c-25.6 0-44.8-19.2-44.8-44.8v-192c0-25.6 19.2-44.8 44.8-44.8h614.4c25.6 0 44.8 19.2 44.8 44.8v192z"></path></svg></button></div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#string-contains" class="router-link-active router-link-exact-active toc-link level2">STRING_CONTAINS</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#function-introduction" class="router-link-active router-link-exact-active toc-link level3">Function introduction</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#usage-example" class="router-link-active router-link-exact-active toc-link level3">Usage example</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#string-matches" class="router-link-active router-link-exact-active toc-link level2">STRING_MATCHES</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#function-introduction-1" class="router-link-active router-link-exact-active toc-link level3">Function introduction</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#usage-example-1" class="router-link-active router-link-exact-active toc-link level3">Usage example</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#length" class="router-link-active router-link-exact-active toc-link level2">Length</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#usage" class="router-link-active router-link-exact-active toc-link level3">Usage</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#examples" class="router-link-active router-link-exact-active toc-link level3">Examples</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#locate" class="router-link-active router-link-exact-active toc-link level2">Locate</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#usage-1" class="router-link-active router-link-exact-active toc-link level3">Usage</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#examples-1" class="router-link-active router-link-exact-active toc-link level3">Examples</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#startswith" class="router-link-active router-link-exact-active toc-link level2">StartsWith</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#usage-2" class="router-link-active router-link-exact-active toc-link level3">Usage</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#examples-2" class="router-link-active router-link-exact-active toc-link level3">Examples</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#endswith" class="router-link-active router-link-exact-active toc-link level2">EndsWith</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#usage-3" class="router-link-active router-link-exact-active toc-link level3">Usage</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#examples-3" class="router-link-active router-link-exact-active toc-link level3">Examples</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#concat" class="router-link-active router-link-exact-active toc-link level2">Concat</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#usage-4" class="router-link-active router-link-exact-active toc-link level3">Usage</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#examples-4" class="router-link-active router-link-exact-active toc-link level3">Examples</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#substring" class="router-link-active router-link-exact-active toc-link level2">substring</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#usage-5" class="router-link-active router-link-exact-active toc-link level3">Usage</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#examples-5" class="router-link-active router-link-exact-active toc-link level3">Examples</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#replace" class="router-link-active router-link-exact-active toc-link level2">replace</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#usage-6" class="router-link-active router-link-exact-active toc-link level3">Usage</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#examples-6" class="router-link-active router-link-exact-active toc-link level3">Examples</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#upper" class="router-link-active router-link-exact-active toc-link level2">Upper</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#usage-7" class="router-link-active router-link-exact-active toc-link level3">Usage</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#examples-7" class="router-link-active router-link-exact-active toc-link level3">Examples</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#lower" class="router-link-active router-link-exact-active toc-link level2">Lower</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#usage-8" class="router-link-active router-link-exact-active toc-link level3">Usage</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#examples-8" class="router-link-active router-link-exact-active toc-link level3">Examples</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#trim" class="router-link-active router-link-exact-active toc-link level2">Trim</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#usage-9" class="router-link-active router-link-exact-active toc-link level3">Usage</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#examples-9" class="router-link-active router-link-exact-active toc-link level3">Examples</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#strcmp" class="router-link-active router-link-exact-active toc-link level2">StrCmp</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#usage-10" class="router-link-active router-link-exact-active toc-link level3">Usage</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#examples-10" class="router-link-active router-link-exact-active toc-link level3">Examples</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#strreplace" class="router-link-active router-link-exact-active toc-link level2">StrReplace</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#usage-11" class="router-link-active router-link-exact-active toc-link level3">Usage</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#examples-11" class="router-link-active router-link-exact-active toc-link level3">Examples</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#regexmatch" class="router-link-active router-link-exact-active toc-link level2">RegexMatch</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#usage-12" class="router-link-active router-link-exact-active toc-link level3">Usage</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#examples-12" class="router-link-active router-link-exact-active toc-link level3">Examples</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#regexreplace" class="router-link-active router-link-exact-active toc-link level2">RegexReplace</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#usage-13" class="router-link-active router-link-exact-active toc-link level3">Usage</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#examples-13" class="router-link-active router-link-exact-active toc-link level3">Examples</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#regexsplit" class="router-link-active router-link-exact-active toc-link level2">RegexSplit</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#usage-14" class="router-link-active router-link-exact-active toc-link level3">Usage</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/Master/Operators-Functions/String.html#examples-14" class="router-link-active router-link-exact-active toc-link level3">Examples</a></li><!----><!--]--></ul><!--]--></ul></div><!--[--><!----><!--]--></aside></div><!----><div class="theme-hope-content"><!--

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--><h1 id="string-processing" tabindex="-1"><a class="header-anchor" href="#string-processing" aria-hidden="true">#</a> String Processing</h1><h2 id="string-contains" tabindex="-1"><a class="header-anchor" href="#string-contains" aria-hidden="true">#</a> STRING_CONTAINS</h2><h3 id="function-introduction" tabindex="-1"><a class="header-anchor" href="#function-introduction" aria-hidden="true">#</a> Function introduction</h3><p>This function checks whether the substring <code>s</code> exists in the string</p><p><strong>Function name:</strong> STRING_CONTAINS</p><p><strong>Input sequence:</strong> Only a single input sequence is supported, the type is TEXT.</p><p><strong>parameter:</strong></p><ul><li><code>s</code>: The string to search for.</li></ul><p><strong>Output Sequence:</strong> Output a single sequence, the type is BOOLEAN.</p><h3 id="usage-example" tabindex="-1"><a class="header-anchor" href="#usage-example" aria-hidden="true">#</a> Usage example</h3><div class="language-sql line-numbers-mode" data-ext="sql"><pre class="language-sql"><code><span class="token keyword">select</span> s1<span class="token punctuation">,</span> string_contains<span class="token punctuation">(</span>s1<span class="token punctuation">,</span> <span class="token string">&#39;s&#39;</span><span class="token operator">=</span><span class="token string">&#39;warn&#39;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d4<span class="token punctuation">;</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-----------------------------+--------------+-------------------------------------------+
|                         Time|root.sg1.d4.s1|string_contains(root.sg1.d4.s1, &quot;s&quot;=&quot;warn&quot;)|
+-----------------------------+--------------+-------------------------------------------+
|1970-01-01T08:00:00.001+08:00|    warn:-8721|                                       true|
|1970-01-01T08:00:00.002+08:00|  error:-37229|                                      false|
|1970-01-01T08:00:00.003+08:00|     warn:1731|                                       true|
+-----------------------------+--------------+-------------------------------------------+
Total line number = 3
It costs 0.007s
</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></div><h2 id="string-matches" tabindex="-1"><a class="header-anchor" href="#string-matches" aria-hidden="true">#</a> STRING_MATCHES</h2><h3 id="function-introduction-1" tabindex="-1"><a class="header-anchor" href="#function-introduction-1" aria-hidden="true">#</a> Function introduction</h3><p>This function judges whether a string can be matched by the regular expression <code>regex</code>.</p><p><strong>Function name:</strong> STRING_MATCHES</p><p><strong>Input sequence:</strong> Only a single input sequence is supported, the type is TEXT.</p><p><strong>parameter:</strong></p><ul><li><code>regex</code>: Java standard library-style regular expressions.</li></ul><p><strong>Output Sequence:</strong> Output a single sequence, the type is BOOLEAN.</p><h3 id="usage-example-1" tabindex="-1"><a class="header-anchor" href="#usage-example-1" aria-hidden="true">#</a> Usage example</h3><div class="language-sql line-numbers-mode" data-ext="sql"><pre class="language-sql"><code><span class="token keyword">select</span> s1<span class="token punctuation">,</span> string_matches<span class="token punctuation">(</span>s1<span class="token punctuation">,</span> <span class="token string">&#39;regex&#39;</span><span class="token operator">=</span><span class="token string">&#39;[^\\s]+37229&#39;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d4<span class="token punctuation">;</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-----------------------------+--------------+------------------------------------------------------+
|                         Time|root.sg1.d4.s1|string_matches(root.sg1.d4.s1, &quot;regex&quot;=&quot;[^\\s]+37229&quot;)|
+-----------------------------+--------------+------------------------------------------------------+
|1970-01-01T08:00:00.001+08:00|    warn:-8721|                                                 false|
|1970-01-01T08:00:00.002+08:00|  error:-37229|                                                  true|
|1970-01-01T08:00:00.003+08:00|     warn:1731|                                                 false|
+-----------------------------+--------------+------------------------------------------------------+
Total line number = 3
It costs 0.007s
</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></div><h2 id="length" tabindex="-1"><a class="header-anchor" href="#length" aria-hidden="true">#</a> Length</h2><h3 id="usage" tabindex="-1"><a class="header-anchor" href="#usage" aria-hidden="true">#</a> Usage</h3><p>The function is used to get the length of input series.</p><p><strong>Name:</strong> LENGTH</p><p><strong>Input Series:</strong> Only support a single input series. The data type is TEXT.</p><p><strong>Output Series:</strong> Output a single series. The type is INT32.</p><p><strong>Note:</strong> Returns NULL if input is NULL.</p><h3 id="examples" tabindex="-1"><a class="header-anchor" href="#examples" aria-hidden="true">#</a> Examples</h3><p>Input series:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-----------------------------+--------------+
|                         Time|root.sg1.d1.s1|
+-----------------------------+--------------+
|1970-01-01T08:00:00.001+08:00|        1test1|
|1970-01-01T08:00:00.002+08:00|      22test22|
+-----------------------------+--------------+
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>SQL for query:</p><div class="language-sql line-numbers-mode" data-ext="sql"><pre class="language-sql"><code><span class="token keyword">select</span> s1<span class="token punctuation">,</span> length<span class="token punctuation">(</span>s1<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d1
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Output series:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-----------------------------+--------------+----------------------+
|                         Time|root.sg1.d1.s1|length(root.sg1.d1.s1)|
+-----------------------------+--------------+----------------------+
|1970-01-01T08:00:00.001+08:00|        1test1|                     6|
|1970-01-01T08:00:00.002+08:00|      22test22|                     8|
+-----------------------------+--------------+----------------------+
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h2 id="locate" tabindex="-1"><a class="header-anchor" href="#locate" aria-hidden="true">#</a> Locate</h2><h3 id="usage-1" tabindex="-1"><a class="header-anchor" href="#usage-1" aria-hidden="true">#</a> Usage</h3><p>The function is used to get the position of the first occurrence of substring <code>target</code> in input series. Returns -1 if there are no <code>target</code> in input.</p><p><strong>Name:</strong> LOCATE</p><p><strong>Input Series:</strong> Only support a single input series. The data type is TEXT.</p><p><strong>Parameter:</strong></p><ul><li><code>target</code>: The substring to be located.</li><li><code>reverse</code>: Indicates whether reverse locate is required. The default value is <code>false</code>, means left-to-right locate.</li></ul><p><strong>Output Series:</strong> Output a single series. The type is INT32.</p><p><strong>Note:</strong> The index begins from 0.</p><h3 id="examples-1" tabindex="-1"><a class="header-anchor" href="#examples-1" aria-hidden="true">#</a> Examples</h3><p>Input series:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-----------------------------+--------------+
|                         Time|root.sg1.d1.s1|
+-----------------------------+--------------+
|1970-01-01T08:00:00.001+08:00|        1test1|
|1970-01-01T08:00:00.002+08:00|      22test22|
+-----------------------------+--------------+
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>SQL for query:</p><div class="language-sql line-numbers-mode" data-ext="sql"><pre class="language-sql"><code><span class="token keyword">select</span> s1<span class="token punctuation">,</span> locate<span class="token punctuation">(</span>s1<span class="token punctuation">,</span> <span class="token string">&quot;target&quot;</span><span class="token operator">=</span><span class="token string">&quot;1&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d1
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Output series:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-----------------------------+--------------+------------------------------------+
|                         Time|root.sg1.d1.s1|locate(root.sg1.d1.s1, &quot;target&quot;=&quot;1&quot;)|
+-----------------------------+--------------+------------------------------------+
|1970-01-01T08:00:00.001+08:00|        1test1|                                   0|
|1970-01-01T08:00:00.002+08:00|      22test22|                                  -1|
+-----------------------------+--------------+------------------------------------+
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>Another SQL for query:</p><div class="language-sql line-numbers-mode" data-ext="sql"><pre class="language-sql"><code><span class="token keyword">select</span> s1<span class="token punctuation">,</span> locate<span class="token punctuation">(</span>s1<span class="token punctuation">,</span> <span class="token string">&quot;target&quot;</span><span class="token operator">=</span><span class="token string">&quot;1&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;reverse&quot;</span><span class="token operator">=</span><span class="token string">&quot;true&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d1
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Output series:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-----------------------------+--------------+------------------------------------------------------+
|                         Time|root.sg1.d1.s1|locate(root.sg1.d1.s1, &quot;target&quot;=&quot;1&quot;, &quot;reverse&quot;=&quot;true&quot;)|
+-----------------------------+--------------+------------------------------------------------------+
|1970-01-01T08:00:00.001+08:00|        1test1|                                                     5|
|1970-01-01T08:00:00.002+08:00|      22test22|                                                    -1|
+-----------------------------+--------------+------------------------------------------------------+
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h2 id="startswith" tabindex="-1"><a class="header-anchor" href="#startswith" aria-hidden="true">#</a> StartsWith</h2><h3 id="usage-2" tabindex="-1"><a class="header-anchor" href="#usage-2" aria-hidden="true">#</a> Usage</h3><p>The function is used to check whether input series starts with the specified prefix.</p><p><strong>Name:</strong> STARTSWITH</p><p><strong>Input Series:</strong> Only support a single input series. The data type is TEXT.</p><p><strong>Parameter:</strong></p><ul><li><code>target</code>: The prefix to be checked.</li></ul><p><strong>Output Series:</strong> Output a single series. The type is BOOLEAN.</p><p><strong>Note:</strong> Returns NULL if input is NULL.</p><h3 id="examples-2" tabindex="-1"><a class="header-anchor" href="#examples-2" aria-hidden="true">#</a> Examples</h3><p>Input series:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-----------------------------+--------------+
|                         Time|root.sg1.d1.s1|
+-----------------------------+--------------+
|1970-01-01T08:00:00.001+08:00|        1test1|
|1970-01-01T08:00:00.002+08:00|      22test22|
+-----------------------------+--------------+
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>SQL for query:</p><div class="language-sql line-numbers-mode" data-ext="sql"><pre class="language-sql"><code><span class="token keyword">select</span> s1<span class="token punctuation">,</span> startswith<span class="token punctuation">(</span>s1<span class="token punctuation">,</span> <span class="token string">&quot;target&quot;</span><span class="token operator">=</span><span class="token string">&quot;1&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d1
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Output series:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-----------------------------+--------------+----------------------------------------+
|                         Time|root.sg1.d1.s1|startswith(root.sg1.d1.s1, &quot;target&quot;=&quot;1&quot;)|
+-----------------------------+--------------+----------------------------------------+
|1970-01-01T08:00:00.001+08:00|        1test1|                                    true|
|1970-01-01T08:00:00.002+08:00|      22test22|                                   false|
+-----------------------------+--------------+----------------------------------------+
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h2 id="endswith" tabindex="-1"><a class="header-anchor" href="#endswith" aria-hidden="true">#</a> EndsWith</h2><h3 id="usage-3" tabindex="-1"><a class="header-anchor" href="#usage-3" aria-hidden="true">#</a> Usage</h3><p>The function is used to check whether input series ends with the specified suffix.</p><p><strong>Name:</strong> ENDSWITH</p><p><strong>Input Series:</strong> Only support a single input series. The data type is TEXT.</p><p><strong>Parameter:</strong></p><ul><li><code>target</code>: The suffix to be checked.</li></ul><p><strong>Output Series:</strong> Output a single series. The type is BOOLEAN.</p><p><strong>Note:</strong> Returns NULL if input is NULL.</p><h3 id="examples-3" tabindex="-1"><a class="header-anchor" href="#examples-3" aria-hidden="true">#</a> Examples</h3><p>Input series:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-----------------------------+--------------+
|                         Time|root.sg1.d1.s1|
+-----------------------------+--------------+
|1970-01-01T08:00:00.001+08:00|        1test1|
|1970-01-01T08:00:00.002+08:00|      22test22|
+-----------------------------+--------------+
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>SQL for query:</p><div class="language-sql line-numbers-mode" data-ext="sql"><pre class="language-sql"><code><span class="token keyword">select</span> s1<span class="token punctuation">,</span> endswith<span class="token punctuation">(</span>s1<span class="token punctuation">,</span> <span class="token string">&quot;target&quot;</span><span class="token operator">=</span><span class="token string">&quot;1&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d1
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Output series:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-----------------------------+--------------+--------------------------------------+
|                         Time|root.sg1.d1.s1|endswith(root.sg1.d1.s1, &quot;target&quot;=&quot;1&quot;)|
+-----------------------------+--------------+--------------------------------------+
|1970-01-01T08:00:00.001+08:00|        1test1|                                  true|
|1970-01-01T08:00:00.002+08:00|      22test22|                                 false|
+-----------------------------+--------------+--------------------------------------+
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h2 id="concat" tabindex="-1"><a class="header-anchor" href="#concat" aria-hidden="true">#</a> Concat</h2><h3 id="usage-4" tabindex="-1"><a class="header-anchor" href="#usage-4" aria-hidden="true">#</a> Usage</h3><p>The function is used to concat input series and target strings.</p><p><strong>Name:</strong> CONCAT</p><p><strong>Input Series:</strong> At least one input series. The data type is TEXT.</p><p><strong>Parameter:</strong></p><ul><li><code>targets</code>: A series of K-V, key needs to start with <code>target</code> and be not duplicated, value is the string you want to concat.</li><li><code>series_behind</code>: Indicates whether series behind targets. The default value is <code>false</code>.</li></ul><p><strong>Output Series:</strong> Output a single series. The type is TEXT.</p><p><strong>Note:</strong></p><ul><li>If value of input series is NULL, it will be skipped.</li><li>We can only concat input series and <code>targets</code> separately. <code>concat(s1, &quot;target1&quot;=&quot;IoT&quot;, s2, &quot;target2&quot;=&quot;DB&quot;)</code> and <code>concat(s1, s2, &quot;target1&quot;=&quot;IoT&quot;, &quot;target2&quot;=&quot;DB&quot;)</code> gives the same result.</li></ul><h3 id="examples-4" tabindex="-1"><a class="header-anchor" href="#examples-4" aria-hidden="true">#</a> Examples</h3><p>Input series:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-----------------------------+--------------+--------------+
|                         Time|root.sg1.d1.s1|root.sg1.d1.s2|
+-----------------------------+--------------+--------------+
|1970-01-01T08:00:00.001+08:00|        1test1|          null|
|1970-01-01T08:00:00.002+08:00|      22test22|      2222test|
+-----------------------------+--------------+--------------+
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>SQL for query:</p><div class="language-sql line-numbers-mode" data-ext="sql"><pre class="language-sql"><code><span class="token keyword">select</span> s1<span class="token punctuation">,</span> s2<span class="token punctuation">,</span> concat<span class="token punctuation">(</span>s1<span class="token punctuation">,</span> s2<span class="token punctuation">,</span> <span class="token string">&quot;target1&quot;</span><span class="token operator">=</span><span class="token string">&quot;IoT&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;target2&quot;</span><span class="token operator">=</span><span class="token string">&quot;DB&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d1
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Output series:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-----------------------------+--------------+--------------+-----------------------------------------------------------------------+
|                         Time|root.sg1.d1.s1|root.sg1.d1.s2|concat(root.sg1.d1.s1, root.sg1.d1.s2, &quot;target1&quot;=&quot;IoT&quot;, &quot;target2&quot;=&quot;DB&quot;)|
+-----------------------------+--------------+--------------+-----------------------------------------------------------------------+
|1970-01-01T08:00:00.001+08:00|        1test1|          null|                                                            1test1IoTDB|
|1970-01-01T08:00:00.002+08:00|      22test22|      2222test|                                                  22test222222testIoTDB|
+-----------------------------+--------------+--------------+-----------------------------------------------------------------------+
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>Another SQL for query:</p><div class="language-sql line-numbers-mode" data-ext="sql"><pre class="language-sql"><code><span class="token keyword">select</span> s1<span class="token punctuation">,</span> s2<span class="token punctuation">,</span> concat<span class="token punctuation">(</span>s1<span class="token punctuation">,</span> s2<span class="token punctuation">,</span> <span class="token string">&quot;target1&quot;</span><span class="token operator">=</span><span class="token string">&quot;IoT&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;target2&quot;</span><span class="token operator">=</span><span class="token string">&quot;DB&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;series_behind&quot;</span><span class="token operator">=</span><span class="token string">&quot;true&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d1
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Output series:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-----------------------------+--------------+--------------+-----------------------------------------------------------------------------------------------+
|                         Time|root.sg1.d1.s1|root.sg1.d1.s2|concat(root.sg1.d1.s1, root.sg1.d1.s2, &quot;target1&quot;=&quot;IoT&quot;, &quot;target2&quot;=&quot;DB&quot;, &quot;series_behind&quot;=&quot;true&quot;)|
+-----------------------------+--------------+--------------+-----------------------------------------------------------------------------------------------+
|1970-01-01T08:00:00.001+08:00|        1test1|          null|                                                                                    IoTDB1test1|
|1970-01-01T08:00:00.002+08:00|      22test22|      2222test|                                                                          IoTDB22test222222test|
+-----------------------------+--------------+--------------+-----------------------------------------------------------------------------------------------+
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h2 id="substring" tabindex="-1"><a class="header-anchor" href="#substring" aria-hidden="true">#</a> substring</h2><h3 id="usage-5" tabindex="-1"><a class="header-anchor" href="#usage-5" aria-hidden="true">#</a> Usage</h3><p>Extracts a substring of a string, starting with the first specified character and stopping after the specified number of characters.The index start at 1 .The value range of from and for is an INT32.</p><p><strong>Name:</strong> SUBSTRING</p><p><strong>Input Series:</strong> Only support a single input series. The data type is TEXT.</p><p><strong>Parameter:</strong></p><ul><li><code>from</code>: Indicates the start position of substring.</li><li><code>for</code>: Indicates how many characters to stop after of substring.</li></ul><p><strong>Output Series:</strong> Output a single series. The type is TEXT.</p><p><strong>Note:</strong> Returns NULL if input is NULL.</p><h3 id="examples-5" tabindex="-1"><a class="header-anchor" href="#examples-5" aria-hidden="true">#</a> Examples</h3><p>Input series:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-----------------------------+--------------+
|                         Time|root.sg1.d1.s1|
+-----------------------------+--------------+
|1970-01-01T08:00:00.001+08:00|        1test1|
|1970-01-01T08:00:00.002+08:00|      22test22|
+-----------------------------+--------------+
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>SQL for query:</p><div class="language-sql line-numbers-mode" data-ext="sql"><pre class="language-sql"><code><span class="token keyword">select</span> s1<span class="token punctuation">,</span> substring<span class="token punctuation">(</span>s1 <span class="token keyword">from</span> <span class="token number">1</span> <span class="token keyword">for</span> <span class="token number">2</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d1
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Output series:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-----------------------------+--------------+--------------------------------------+
|                         Time|root.sg1.d1.s1|SUBSTRING(root.sg1.d1.s1 FROM 1 FOR 2)|
+-----------------------------+--------------+--------------------------------------+
|1970-01-01T08:00:00.001+08:00|        1test1|                                    1t|
|1970-01-01T08:00:00.002+08:00|      22test22|                                    22|
+-----------------------------+--------------+--------------------------------------+
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h2 id="replace" tabindex="-1"><a class="header-anchor" href="#replace" aria-hidden="true">#</a> replace</h2><h3 id="usage-6" tabindex="-1"><a class="header-anchor" href="#usage-6" aria-hidden="true">#</a> Usage</h3><p>Replace a substring in the input sequence with the target substring.</p><p><strong>Name:</strong> REPLACE</p><p><strong>Input Series:</strong> Only support a single input series. The data type is TEXT.</p><p><strong>Parameter:</strong></p><ul><li>first parameter: The target substring to be replaced.</li><li>second parameter: The substring to replace with.</li></ul><p><strong>Output Series:</strong> Output a single series. The type is TEXT.</p><p><strong>Note:</strong> Returns NULL if input is NULL.</p><h3 id="examples-6" tabindex="-1"><a class="header-anchor" href="#examples-6" aria-hidden="true">#</a> Examples</h3><p>Input series:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-----------------------------+--------------+
|                         Time|root.sg1.d1.s1|
+-----------------------------+--------------+
|1970-01-01T08:00:00.001+08:00|        1test1|
|1970-01-01T08:00:00.002+08:00|      22test22|
+-----------------------------+--------------+
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>SQL for query:</p><div class="language-sql line-numbers-mode" data-ext="sql"><pre class="language-sql"><code><span class="token keyword">select</span> s1<span class="token punctuation">,</span> <span class="token keyword">replace</span><span class="token punctuation">(</span>s1<span class="token punctuation">,</span> <span class="token string">&#39;es&#39;</span><span class="token punctuation">,</span> <span class="token string">&#39;tt&#39;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d1
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Output series:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-----------------------------+--------------+-----------------------------------+
|                         Time|root.sg1.d1.s1|REPLACE(root.sg1.d1.s1, &#39;es&#39;, &#39;tt&#39;)|
+-----------------------------+--------------+-----------------------------------+
|1970-01-01T08:00:00.001+08:00|        1test1|                             1tttt1|
|1970-01-01T08:00:00.002+08:00|      22test22|                           22tttt22|
+-----------------------------+--------------+-----------------------------------+
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h2 id="upper" tabindex="-1"><a class="header-anchor" href="#upper" aria-hidden="true">#</a> Upper</h2><h3 id="usage-7" tabindex="-1"><a class="header-anchor" href="#usage-7" aria-hidden="true">#</a> Usage</h3><p>The function is used to get the string of input series with all characters changed to uppercase.</p><p><strong>Name:</strong> UPPER</p><p><strong>Input Series:</strong> Only support a single input series. The data type is TEXT.</p><p><strong>Output Series:</strong> Output a single series. The type is TEXT.</p><p><strong>Note:</strong> Returns NULL if input is NULL.</p><h3 id="examples-7" tabindex="-1"><a class="header-anchor" href="#examples-7" aria-hidden="true">#</a> Examples</h3><p>Input series:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-----------------------------+--------------+
|                         Time|root.sg1.d1.s1|
+-----------------------------+--------------+
|1970-01-01T08:00:00.001+08:00|        1test1|
|1970-01-01T08:00:00.002+08:00|      22test22|
+-----------------------------+--------------+
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>SQL for query:</p><div class="language-sql line-numbers-mode" data-ext="sql"><pre class="language-sql"><code><span class="token keyword">select</span> s1<span class="token punctuation">,</span> upper<span class="token punctuation">(</span>s1<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d1
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Output series:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-----------------------------+--------------+---------------------+
|                         Time|root.sg1.d1.s1|upper(root.sg1.d1.s1)|
+-----------------------------+--------------+---------------------+
|1970-01-01T08:00:00.001+08:00|        1test1|               1TEST1|
|1970-01-01T08:00:00.002+08:00|      22test22|             22TEST22|
+-----------------------------+--------------+---------------------+
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h2 id="lower" tabindex="-1"><a class="header-anchor" href="#lower" aria-hidden="true">#</a> Lower</h2><h3 id="usage-8" tabindex="-1"><a class="header-anchor" href="#usage-8" aria-hidden="true">#</a> Usage</h3><p>The function is used to get the string of input series with all characters changed to lowercase.</p><p><strong>Name:</strong> LOWER</p><p><strong>Input Series:</strong> Only support a single input series. The data type is TEXT.</p><p><strong>Output Series:</strong> Output a single series. The type is TEXT.</p><p><strong>Note:</strong> Returns NULL if input is NULL.</p><h3 id="examples-8" tabindex="-1"><a class="header-anchor" href="#examples-8" aria-hidden="true">#</a> Examples</h3><p>Input series:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-----------------------------+--------------+
|                         Time|root.sg1.d1.s1|
+-----------------------------+--------------+
|1970-01-01T08:00:00.001+08:00|        1TEST1|
|1970-01-01T08:00:00.002+08:00|      22TEST22|
+-----------------------------+--------------+
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>SQL for query:</p><div class="language-sql line-numbers-mode" data-ext="sql"><pre class="language-sql"><code><span class="token keyword">select</span> s1<span class="token punctuation">,</span> lower<span class="token punctuation">(</span>s1<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d1
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Output series:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-----------------------------+--------------+---------------------+
|                         Time|root.sg1.d1.s1|lower(root.sg1.d1.s1)|
+-----------------------------+--------------+---------------------+
|1970-01-01T08:00:00.001+08:00|        1TEST1|               1test1|
|1970-01-01T08:00:00.002+08:00|      22TEST22|             22test22|
+-----------------------------+--------------+---------------------+
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h2 id="trim" tabindex="-1"><a class="header-anchor" href="#trim" aria-hidden="true">#</a> Trim</h2><h3 id="usage-9" tabindex="-1"><a class="header-anchor" href="#usage-9" aria-hidden="true">#</a> Usage</h3><p>The function is used to get the string whose value is same to input series, with all leading and trailing space removed.</p><p><strong>Name:</strong> TRIM</p><p><strong>Input Series:</strong> Only support a single input series. The data type is TEXT.</p><p><strong>Output Series:</strong> Output a single series. The type is TEXT.</p><p><strong>Note:</strong> Returns NULL if input is NULL.</p><h3 id="examples-9" tabindex="-1"><a class="header-anchor" href="#examples-9" aria-hidden="true">#</a> Examples</h3><p>Input series:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-----------------------------+--------------+
|                         Time|root.sg1.d1.s3|
+-----------------------------+--------------+
|1970-01-01T08:00:00.002+08:00|   3querytest3|
|1970-01-01T08:00:00.003+08:00|  3querytest3 |
+-----------------------------+--------------+
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>SQL for query:</p><div class="language-sql line-numbers-mode" data-ext="sql"><pre class="language-sql"><code><span class="token keyword">select</span> s3<span class="token punctuation">,</span> trim<span class="token punctuation">(</span>s3<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d1
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Output series:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-----------------------------+--------------+--------------------+
|                         Time|root.sg1.d1.s3|trim(root.sg1.d1.s3)|
+-----------------------------+--------------+--------------------+
|1970-01-01T08:00:00.002+08:00|   3querytest3|         3querytest3|
|1970-01-01T08:00:00.003+08:00|  3querytest3 |         3querytest3|
+-----------------------------+--------------+--------------------+
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h2 id="strcmp" tabindex="-1"><a class="header-anchor" href="#strcmp" aria-hidden="true">#</a> StrCmp</h2><h3 id="usage-10" tabindex="-1"><a class="header-anchor" href="#usage-10" aria-hidden="true">#</a> Usage</h3><p>The function is used to get the compare result of two input series. Returns <code>0</code> if series value are the same, a <code>negative integer</code> if value of series1 is smaller than series2, a <code>positive integer</code> if value of series1 is more than series2.</p><p><strong>Name:</strong> StrCmp</p><p><strong>Input Series:</strong> Support two input series. Data types are all the TEXT.</p><p><strong>Output Series:</strong> Output a single series. The type is INT32.</p><p><strong>Note:</strong> Returns NULL either series value is NULL.</p><h3 id="examples-10" tabindex="-1"><a class="header-anchor" href="#examples-10" aria-hidden="true">#</a> Examples</h3><p>Input series:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-----------------------------+--------------+--------------+
|                         Time|root.sg1.d1.s1|root.sg1.d1.s2|
+-----------------------------+--------------+--------------+
|1970-01-01T08:00:00.001+08:00|        1test1|          null|
|1970-01-01T08:00:00.002+08:00|      22test22|      2222test|
+-----------------------------+--------------+--------------+
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>SQL for query:</p><div class="language-sql line-numbers-mode" data-ext="sql"><pre class="language-sql"><code><span class="token keyword">select</span> s1<span class="token punctuation">,</span> s2<span class="token punctuation">,</span> strcmp<span class="token punctuation">(</span>s1<span class="token punctuation">,</span> s2<span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d1
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Output series:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-----------------------------+--------------+--------------+--------------------------------------+
|                         Time|root.sg1.d1.s1|root.sg1.d1.s2|strcmp(root.sg1.d1.s1, root.sg1.d1.s2)|
+-----------------------------+--------------+--------------+--------------------------------------+
|1970-01-01T08:00:00.001+08:00|        1test1|          null|                                  null|
|1970-01-01T08:00:00.002+08:00|      22test22|      2222test|                                    66|
+-----------------------------+--------------+--------------+--------------------------------------+
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h2 id="strreplace" tabindex="-1"><a class="header-anchor" href="#strreplace" aria-hidden="true">#</a> StrReplace</h2><h3 id="usage-11" tabindex="-1"><a class="header-anchor" href="#usage-11" aria-hidden="true">#</a> Usage</h3><p><strong>This is not a built-in function and can only be used after registering the library-udf.</strong> The function is used to replace the specific substring with given string.</p><p><strong>Name:</strong> STRREPLACE</p><p><strong>Input Series:</strong> Only support a single input series. The data type is TEXT.</p><p><strong>Parameter:</strong></p><ul><li><code>target</code>: The target substring to be replaced.</li><li><code>replace</code>: The string to be put on.</li><li><code>limit</code>: The number of matches to be replaced which should be an integer no less than -1, default to -1 which means all matches will be replaced.</li><li><code>offset</code>: The number of matches to be skipped, which means the first <code>offset</code> matches will not be replaced, default to 0.</li><li><code>reverse</code>: Whether to count all the matches reversely, default to &#39;false&#39;.</li></ul><p><strong>Output Series:</strong> Output a single series. The type is TEXT.</p><h3 id="examples-11" tabindex="-1"><a class="header-anchor" href="#examples-11" aria-hidden="true">#</a> Examples</h3><p>Input series:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-----------------------------+---------------+
|                         Time|root.test.d1.s1|
+-----------------------------+---------------+
|2021-01-01T00:00:01.000+08:00|      A,B,A+,B-|
|2021-01-01T00:00:02.000+08:00|      A,A+,A,B+|
|2021-01-01T00:00:03.000+08:00|         B+,B,B|
|2021-01-01T00:00:04.000+08:00|      A+,A,A+,A|
|2021-01-01T00:00:05.000+08:00|       A,B-,B,B|
+-----------------------------+---------------+
</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></div><p>SQL for query:</p><div class="language-sql line-numbers-mode" data-ext="sql"><pre class="language-sql"><code><span class="token keyword">select</span> strreplace<span class="token punctuation">(</span>s1<span class="token punctuation">,</span> <span class="token string">&quot;target&quot;</span><span class="token operator">=</span><span class="token string">&quot;,&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;replace&quot;</span><span class="token operator">=</span><span class="token string">&quot;/&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;limit&quot;</span><span class="token operator">=</span><span class="token string">&quot;2&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Output series:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-----------------------------+-----------------------------------------+
|                         Time|strreplace(root.test.d1.s1, &quot;target&quot;=&quot;,&quot;,|
|                             |              &quot;replace&quot;=&quot;/&quot;, &quot;limit&quot;=&quot;2&quot;)|
+-----------------------------+-----------------------------------------+
|2021-01-01T00:00:01.000+08:00|                                A/B/A+,B-|
|2021-01-01T00:00:02.000+08:00|                                A/A+/A,B+|
|2021-01-01T00:00:03.000+08:00|                                   B+/B/B|
|2021-01-01T00:00:04.000+08:00|                                A+/A/A+,A|
|2021-01-01T00:00:05.000+08:00|                                 A/B-/B,B|
+-----------------------------+-----------------------------------------+
</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></div><p>Another SQL for query:</p><div class="language-sql line-numbers-mode" data-ext="sql"><pre class="language-sql"><code><span class="token keyword">select</span> strreplace<span class="token punctuation">(</span>s1<span class="token punctuation">,</span> <span class="token string">&quot;target&quot;</span><span class="token operator">=</span><span class="token string">&quot;,&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;replace&quot;</span><span class="token operator">=</span><span class="token string">&quot;/&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;limit&quot;</span><span class="token operator">=</span><span class="token string">&quot;1&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;offset&quot;</span><span class="token operator">=</span><span class="token string">&quot;1&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;reverse&quot;</span><span class="token operator">=</span><span class="token string">&quot;true&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Output series:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-----------------------------+-----------------------------------------------------+
|                         Time|strreplace(root.test.d1.s1, &quot;target&quot;=&quot;,&quot;, &quot;replace&quot;= | 
|                             |    &quot;|&quot;, &quot;limit&quot;=&quot;1&quot;, &quot;offset&quot;=&quot;1&quot;, &quot;reverse&quot;=&quot;true&quot;)|
+-----------------------------+-----------------------------------------------------+
|2021-01-01T00:00:01.000+08:00|                                            A,B/A+,B-|
|2021-01-01T00:00:02.000+08:00|                                            A,A+/A,B+|
|2021-01-01T00:00:03.000+08:00|                                               B+/B,B|
|2021-01-01T00:00:04.000+08:00|                                            A+,A/A+,A|
|2021-01-01T00:00:05.000+08:00|                                             A,B-/B,B|
+-----------------------------+-----------------------------------------------------+
</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></div><h2 id="regexmatch" tabindex="-1"><a class="header-anchor" href="#regexmatch" aria-hidden="true">#</a> RegexMatch</h2><h3 id="usage-12" tabindex="-1"><a class="header-anchor" href="#usage-12" aria-hidden="true">#</a> Usage</h3><p><strong>This is not a built-in function and can only be used after registering the library-udf.</strong> The function is used to fetch matched contents from text with given regular expression.</p><p><strong>Name:</strong> REGEXMATCH</p><p><strong>Input Series:</strong> Only support a single input series. The data type is TEXT.</p><p><strong>Parameter:</strong></p><ul><li><code>regex</code>: The regular expression to match in the text. All grammars supported by Java are acceptable, for example, <code>\d+\.\d+\.\d+\.\d+</code> is expected to match any IPv4 addresses.</li><li><code>group</code>: The wanted group index in the matched result. Reference to java.util.regex, group 0 is the whole pattern and the next ones are numbered with the appearance order of left parentheses. For example, the groups in <code>A(B(CD))</code> are: 0-<code>A(B(CD))</code>, 1-<code>B(CD)</code>, 2-<code>CD</code>.</li></ul><p><strong>Output Series:</strong> Output a single series. The type is TEXT.</p><p><strong>Note:</strong> Those points with null values or not matched with the given pattern will not return any results.</p><h3 id="examples-12" tabindex="-1"><a class="header-anchor" href="#examples-12" aria-hidden="true">#</a> Examples</h3><p>Input series:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-----------------------------+-------------------------------+
|                         Time|                root.test.d1.s1|
+-----------------------------+-------------------------------+
|2021-01-01T00:00:01.000+08:00|        [192.168.0.1] [SUCCESS]|
|2021-01-01T00:00:02.000+08:00|       [192.168.0.24] [SUCCESS]|
|2021-01-01T00:00:03.000+08:00|           [192.168.0.2] [FAIL]|
|2021-01-01T00:00:04.000+08:00|        [192.168.0.5] [SUCCESS]|
|2021-01-01T00:00:05.000+08:00|      [192.168.0.124] [SUCCESS]|
+-----------------------------+-------------------------------+
</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></div><p>SQL for query:</p><div class="language-sql line-numbers-mode" data-ext="sql"><pre class="language-sql"><code><span class="token keyword">select</span> regexmatch<span class="token punctuation">(</span>s1<span class="token punctuation">,</span> <span class="token string">&quot;regex&quot;</span><span class="token operator">=</span><span class="token string">&quot;\d+\.\d+\.\d+\.\d+&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;group&quot;</span><span class="token operator">=</span><span class="token string">&quot;0&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Output series:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-----------------------------+----------------------------------------------------------------------+
|                         Time|regexmatch(root.test.d1.s1, &quot;regex&quot;=&quot;\d+\.\d+\.\d+\.\d+&quot;, &quot;group&quot;=&quot;0&quot;)|
+-----------------------------+----------------------------------------------------------------------+
|2021-01-01T00:00:01.000+08:00|                                                           192.168.0.1|
|2021-01-01T00:00:02.000+08:00|                                                          192.168.0.24|
|2021-01-01T00:00:03.000+08:00|                                                           192.168.0.2|
|2021-01-01T00:00:04.000+08:00|                                                           192.168.0.5|
|2021-01-01T00:00:05.000+08:00|                                                         192.168.0.124|
+-----------------------------+----------------------------------------------------------------------+
</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></div><h2 id="regexreplace" tabindex="-1"><a class="header-anchor" href="#regexreplace" aria-hidden="true">#</a> RegexReplace</h2><h3 id="usage-13" tabindex="-1"><a class="header-anchor" href="#usage-13" aria-hidden="true">#</a> Usage</h3><p><strong>This is not a built-in function and can only be used after registering the library-udf.</strong> The function is used to replace the specific regular expression matches with given string.</p><p><strong>Name:</strong> REGEXREPLACE</p><p><strong>Input Series:</strong> Only support a single input series. The data type is TEXT.</p><p><strong>Parameter:</strong></p><ul><li><code>regex</code>: The target regular expression to be replaced. All grammars supported by Java are acceptable.</li><li><code>replace</code>: The string to be put on and back reference notes in Java is also supported, for example, &#39;$1&#39; refers to group 1 in the <code>regex</code> which will be filled with corresponding matched results.</li><li><code>limit</code>: The number of matches to be replaced which should be an integer no less than -1, default to -1 which means all matches will be replaced.</li><li><code>offset</code>: The number of matches to be skipped, which means the first <code>offset</code> matches will not be replaced, default to 0.</li><li><code>reverse</code>: Whether to count all the matches reversely, default to &#39;false&#39;.</li></ul><p><strong>Output Series:</strong> Output a single series. The type is TEXT.</p><h3 id="examples-13" tabindex="-1"><a class="header-anchor" href="#examples-13" aria-hidden="true">#</a> Examples</h3><p>Input series:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-----------------------------+-------------------------------+
|                         Time|                root.test.d1.s1|
+-----------------------------+-------------------------------+
|2021-01-01T00:00:01.000+08:00|        [192.168.0.1] [SUCCESS]|
|2021-01-01T00:00:02.000+08:00|       [192.168.0.24] [SUCCESS]|
|2021-01-01T00:00:03.000+08:00|           [192.168.0.2] [FAIL]|
|2021-01-01T00:00:04.000+08:00|        [192.168.0.5] [SUCCESS]|
|2021-01-01T00:00:05.000+08:00|      [192.168.0.124] [SUCCESS]|
+-----------------------------+-------------------------------+
</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></div><p>SQL for query:</p><div class="language-sql line-numbers-mode" data-ext="sql"><pre class="language-sql"><code><span class="token keyword">select</span> regexreplace<span class="token punctuation">(</span>s1<span class="token punctuation">,</span> <span class="token string">&quot;regex&quot;</span><span class="token operator">=</span><span class="token string">&quot;192\.168\.0\.(\d+)&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;replace&quot;</span><span class="token operator">=</span><span class="token string">&quot;cluster-$1&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;limit&quot;</span><span class="token operator">=</span><span class="token string">&quot;1&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Output series:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-----------------------------+-----------------------------------------------------------+
|                         Time|regexreplace(root.test.d1.s1, &quot;regex&quot;=&quot;192\.168\.0\.(\d+)&quot;,|
|                             |                       &quot;replace&quot;=&quot;cluster-$1&quot;, &quot;limit&quot;=&quot;1&quot;)|
+-----------------------------+-----------------------------------------------------------+
|2021-01-01T00:00:01.000+08:00|                                      [cluster-1] [SUCCESS]|
|2021-01-01T00:00:02.000+08:00|                                     [cluster-24] [SUCCESS]|
|2021-01-01T00:00:03.000+08:00|                                         [cluster-2] [FAIL]|
|2021-01-01T00:00:04.000+08:00|                                      [cluster-5] [SUCCESS]|
|2021-01-01T00:00:05.000+08:00|                                    [cluster-124] [SUCCESS]|
+-----------------------------+-----------------------------------------------------------+
</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></div><h2 id="regexsplit" tabindex="-1"><a class="header-anchor" href="#regexsplit" aria-hidden="true">#</a> RegexSplit</h2><h3 id="usage-14" tabindex="-1"><a class="header-anchor" href="#usage-14" aria-hidden="true">#</a> Usage</h3><p><strong>This is not a built-in function and can only be used after registering the library-udf.</strong> The function is used to split text with given regular expression and return specific element.</p><p><strong>Name:</strong> REGEXSPLIT</p><p><strong>Input Series:</strong> Only support a single input series. The data type is TEXT.</p><p><strong>Parameter:</strong></p><ul><li><code>regex</code>: The regular expression used to split the text. All grammars supported by Java are acceptable, for example, <code>[&#39;&quot;]</code> is expected to match <code>&#39;</code> and <code>&quot;</code>.</li><li><code>index</code>: The wanted index of elements in the split result. It should be an integer no less than -1, default to -1 which means the length of the result array is returned and any non-negative integer is used to fetch the text of the specific index starting from 0.</li></ul><p><strong>Output Series:</strong> Output a single series. The type is INT32 when <code>index</code> is -1 and TEXT when it&#39;s an valid index.</p><p><strong>Note:</strong> When <code>index</code> is out of the range of the result array, for example <code>0,1,2</code> split with <code>,</code> and <code>index</code> is set to 3, no result are returned for that record.</p><h3 id="examples-14" tabindex="-1"><a class="header-anchor" href="#examples-14" aria-hidden="true">#</a> Examples</h3><p>Input series:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-----------------------------+---------------+
|                         Time|root.test.d1.s1|
+-----------------------------+---------------+
|2021-01-01T00:00:01.000+08:00|      A,B,A+,B-|
|2021-01-01T00:00:02.000+08:00|      A,A+,A,B+|
|2021-01-01T00:00:03.000+08:00|         B+,B,B|
|2021-01-01T00:00:04.000+08:00|      A+,A,A+,A|
|2021-01-01T00:00:05.000+08:00|       A,B-,B,B|
+-----------------------------+---------------+
</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></div><p>SQL for query:</p><div class="language-sql line-numbers-mode" data-ext="sql"><pre class="language-sql"><code><span class="token keyword">select</span> regexsplit<span class="token punctuation">(</span>s1<span class="token punctuation">,</span> <span class="token string">&quot;regex&quot;</span><span class="token operator">=</span><span class="token string">&quot;,&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;index&quot;</span><span class="token operator">=</span><span class="token string">&quot;-1&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Output series:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-----------------------------+------------------------------------------------------+
|                         Time|regexsplit(root.test.d1.s1, &quot;regex&quot;=&quot;,&quot;, &quot;index&quot;=&quot;-1&quot;)|
+-----------------------------+------------------------------------------------------+
|2021-01-01T00:00:01.000+08:00|                                                     4|
|2021-01-01T00:00:02.000+08:00|                                                     4|
|2021-01-01T00:00:03.000+08:00|                                                     3|
|2021-01-01T00:00:04.000+08:00|                                                     4|
|2021-01-01T00:00:05.000+08:00|                                                     4|
+-----------------------------+------------------------------------------------------+
</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></div><p>Another SQL for query:</p><p>SQL for query:</p><div class="language-sql line-numbers-mode" data-ext="sql"><pre class="language-sql"><code><span class="token keyword">select</span> regexsplit<span class="token punctuation">(</span>s1<span class="token punctuation">,</span> <span class="token string">&quot;regex&quot;</span><span class="token operator">=</span><span class="token string">&quot;,&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;index&quot;</span><span class="token operator">=</span><span class="token string">&quot;3&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d1
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Output series:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-----------------------------+-----------------------------------------------------+
|                         Time|regexsplit(root.test.d1.s1, &quot;regex&quot;=&quot;,&quot;, &quot;index&quot;=&quot;3&quot;)|
+-----------------------------+-----------------------------------------------------+
|2021-01-01T00:00:01.000+08:00|                                                   B-|
|2021-01-01T00:00:02.000+08:00|                                                   B+|
|2021-01-01T00:00:04.000+08:00|                                                    A|
|2021-01-01T00:00:05.000+08:00|                                                    B|
+-----------------------------+-----------------------------------------------------+
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/apache/iotdb/edit/master/docs/UserGuide/Operators-Functions/String.md" rel="noopener noreferrer" target="_blank" aria-label="Found Error? Edit this page on GitHub" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewBox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->Found Error? Edit this page on GitHub<span><svg class="external-link-icon" 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"><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="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item git-info"><!----><!----></div></footer><!----><!----><!----><!--]--></main><!--]--><footer style="padding-bottom:2rem;"><span id="doc-version" style="display:none;">master</span><p style="text-align:center;color:#909399;font-size:12px;margin:0 30px;">Copyright © 2023 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;"> We use <a href="https://analytics.google.com">Google Analytics</a> to collect anonymous, aggregated usage information. </p></footer></div><!--]--><!--]--><!----><!--]--></div>
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