| import{_ as e,o as s,c as a,e as n}from"./app-Bp5kEZWW.js";const t={},o=n(`<h1 id="comparison-operators-and-functions" tabindex="-1"><a class="header-anchor" href="#comparison-operators-and-functions"><span>Comparison Operators and Functions</span></a></h1><h2 id="basic-comparison-operators" tabindex="-1"><a class="header-anchor" href="#basic-comparison-operators"><span>Basic comparison operators</span></a></h2><p>Supported operators <code>></code>, <code>>=</code>, <code><</code>, <code><=</code>, <code>==</code>, <code>!=</code> (or <code><></code> )</p><p>Supported input data types: <code>INT32</code>, <code>INT64</code>, <code>FLOAT</code> and <code>DOUBLE</code></p><p>Note: It will transform all type to <code>DOUBLE</code> then do computation.</p><p>Output data type: <code>BOOLEAN</code></p><p><strong>Example:</strong></p><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">select</span> a<span class="token punctuation">,</span> b<span class="token punctuation">,</span> a <span class="token operator">></span> <span class="token number">10</span><span class="token punctuation">,</span> a <span class="token operator"><=</span> b<span class="token punctuation">,</span> <span class="token operator">!</span><span class="token punctuation">(</span>a <span class="token operator"><=</span> b<span class="token punctuation">)</span><span class="token punctuation">,</span> a <span class="token operator">></span> <span class="token number">10</span> <span class="token operator">&&</span> a <span class="token operator">></span> b <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<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" data-title="text"><pre class="language-text"><code>IoTDB> select a, b, a > 10, a <= b, !(a <= b), a > 10 && a > b from root.test; |
| +-----------------------------+-----------+-----------+----------------+--------------------------+---------------------------+------------------------------------------------+ |
| | Time|root.test.a|root.test.b|root.test.a > 10|root.test.a <= root.test.b|!root.test.a <= root.test.b|(root.test.a > 10) & (root.test.a > root.test.b)| |
| +-----------------------------+-----------+-----------+----------------+--------------------------+---------------------------+------------------------------------------------+ |
| |1970-01-01T08:00:00.001+08:00| 23| 10.0| true| false| true| true| |
| |1970-01-01T08:00:00.002+08:00| 33| 21.0| true| false| true| true| |
| |1970-01-01T08:00:00.004+08:00| 13| 15.0| true| true| false| false| |
| |1970-01-01T08:00:00.005+08:00| 26| 0.0| true| false| true| true| |
| |1970-01-01T08:00:00.008+08:00| 1| 22.0| false| true| false| false| |
| |1970-01-01T08:00:00.010+08:00| 23| 12.0| true| false| true| true| |
| +-----------------------------+-----------+-----------+----------------+--------------------------+---------------------------+------------------------------------------------+ |
| </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></div><h2 id="between-and-operator" tabindex="-1"><a class="header-anchor" href="#between-and-operator"><span><code>BETWEEN ... AND ...</code> operator</span></a></h2><table><thead><tr><th>operator</th><th>meaning</th></tr></thead><tbody><tr><td><code>BETWEEN ... AND ...</code></td><td>within the specified range</td></tr><tr><td><code>NOT BETWEEN ... AND ...</code></td><td>Not within the specified range</td></tr></tbody></table><p><strong>Example:</strong> Select data within or outside the interval [36.5,40]:</p><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">select</span> temperature <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d1 <span class="token keyword">where</span> temperature <span class="token operator">between</span> <span class="token number">36.5</span> <span class="token operator">and</span> <span class="token number">40</span><span class="token punctuation">;</span> |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">select</span> temperature <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d1 <span class="token keyword">where</span> temperature <span class="token operator">not</span> <span class="token operator">between</span> <span class="token number">36.5</span> <span class="token operator">and</span> <span class="token number">40</span><span class="token punctuation">;</span> |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h2 id="fuzzy-matching-operator" tabindex="-1"><a class="header-anchor" href="#fuzzy-matching-operator"><span>Fuzzy matching operator</span></a></h2><p>For TEXT type data, support fuzzy matching of data using <code>Like</code> and <code>Regexp</code> operators.</p><table><thead><tr><th>operator</th><th>meaning</th></tr></thead><tbody><tr><td><code>LIKE</code></td><td>matches simple patterns</td></tr><tr><td><code>NOT LIKE</code></td><td>cannot match simple pattern</td></tr><tr><td><code>REGEXP</code></td><td>Match regular expression</td></tr><tr><td><code>NOT REGEXP</code></td><td>Cannot match regular expression</td></tr></tbody></table><p>Input data type: <code>TEXT</code></p><p>Return type: <code>BOOLEAN</code></p><h3 id="use-like-for-fuzzy-matching" tabindex="-1"><a class="header-anchor" href="#use-like-for-fuzzy-matching"><span>Use <code>Like</code> for fuzzy matching</span></a></h3><p><strong>Matching rules:</strong></p><ul><li><code>%</code> means any 0 or more characters.</li><li><code>_</code> means any single character.</li></ul><p><strong>Example 1:</strong> Query the data under <code>root.sg.d1</code> that contains <code>'cc'</code> in <code>value</code>.</p><div class="language-bash line-numbers-mode" data-ext="sh" data-title="sh"><pre class="language-bash"><code>IoTDB<span class="token operator">></span> <span class="token keyword">select</span> * from root.sg.d1 where value like <span class="token string">'%cc%'</span> |
| +--------------------------+----------------+ |
| <span class="token operator">|</span> Time<span class="token operator">|</span>root.sg.d1.value<span class="token operator">|</span> |
| +--------------------------+----------------+ |
| <span class="token operator">|</span><span class="token number">2017</span>-11-01T00:00:00.000+08:00<span class="token operator">|</span> aabbccdd<span class="token operator">|</span> |
| <span class="token operator">|</span><span class="token number">2017</span>-11-01T00:00:01.000+08:00<span class="token operator">|</span> cc<span class="token operator">|</span> |
| +--------------------------+----------------+ |
| Total line number <span class="token operator">=</span> <span class="token number">2</span> |
| It costs <span class="token number">0</span>.002s |
| </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><strong>Example 2:</strong> Query the data under <code>root.sg.d1</code> with <code>'b'</code> in the middle of <code>value</code> and any single character before and after.</p><div class="language-bash line-numbers-mode" data-ext="sh" data-title="sh"><pre class="language-bash"><code>IoTDB<span class="token operator">></span> <span class="token keyword">select</span> * from root.sg.device where value like <span class="token string">'_b_'</span> |
| +--------------------------+----------------+ |
| <span class="token operator">|</span> Time<span class="token operator">|</span>root.sg.d1.value<span class="token operator">|</span> |
| +--------------------------+----------------+ |
| <span class="token operator">|</span><span class="token number">2017</span>-11-01T00:00:02.000+08:00<span class="token operator">|</span>abc<span class="token operator">|</span> |
| +--------------------------+----------------+ |
| Total line number <span class="token operator">=</span> <span class="token number">1</span> |
| It costs <span class="token number">0</span>.002s |
| </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><h3 id="use-regexp-for-fuzzy-matching" tabindex="-1"><a class="header-anchor" href="#use-regexp-for-fuzzy-matching"><span>Use <code>Regexp</code> for fuzzy matching</span></a></h3><p>The filter condition that needs to be passed in is <strong>Java standard library style regular expression</strong>.</p><p><strong>Common regular matching examples:</strong></p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>All characters with a length of 3-20: ^.{3,20}$ |
| Uppercase English characters: ^[A-Z]+$ |
| Numbers and English characters: ^[A-Za-z0-9]+$ |
| Starting with a: ^a.* |
| </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></div><p><strong>Example 1:</strong> Query the string of 26 English characters for value under root.sg.d1.</p><div class="language-bash line-numbers-mode" data-ext="sh" data-title="sh"><pre class="language-bash"><code>IoTDB<span class="token operator">></span> <span class="token keyword">select</span> * from root.sg.d1 where value regexp <span class="token string">'^[A-Za-z]+$'</span> |
| +--------------------------+----------------+ |
| <span class="token operator">|</span> Time<span class="token operator">|</span>root.sg.d1.value<span class="token operator">|</span> |
| +--------------------------+----------------+ |
| <span class="token operator">|</span><span class="token number">2017</span>-11-01T00:00:00.000+08:00<span class="token operator">|</span> aabbccdd<span class="token operator">|</span> |
| <span class="token operator">|</span><span class="token number">2017</span>-11-01T00:00:01.000+08:00<span class="token operator">|</span> cc<span class="token operator">|</span> |
| +--------------------------+----------------+ |
| Total line number <span class="token operator">=</span> <span class="token number">2</span> |
| It costs <span class="token number">0</span>.002s |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p><strong>Example 2:</strong> Query root.sg.d1 where the value is a string consisting of 26 lowercase English characters and the time is greater than 100.</p><div class="language-bash line-numbers-mode" data-ext="sh" data-title="sh"><pre class="language-bash"><code>IoTDB<span class="token operator">></span> <span class="token keyword">select</span> * from root.sg.d1 where value regexp <span class="token string">'^[a-z]+$'</span> and <span class="token function">time</span> <span class="token operator">></span> <span class="token number">100</span> |
| +--------------------------+----------------+ |
| <span class="token operator">|</span> Time<span class="token operator">|</span>root.sg.d1.value<span class="token operator">|</span> |
| +--------------------------+----------------+ |
| <span class="token operator">|</span><span class="token number">2017</span>-11-01T00:00:00.000+08:00<span class="token operator">|</span> aabbccdd<span class="token operator">|</span> |
| <span class="token operator">|</span><span class="token number">2017</span>-11-01T00:00:01.000+08:00<span class="token operator">|</span> cc<span class="token operator">|</span> |
| +--------------------------+----------------+ |
| Total line number <span class="token operator">=</span> <span class="token number">2</span> |
| It costs <span class="token number">0</span>.002s |
| </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><strong>Example 3:</strong></p><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">select</span> b<span class="token punctuation">,</span> b <span class="token operator">like</span> <span class="token string">'1%'</span><span class="token punctuation">,</span> b <span class="token operator">regexp</span> <span class="token string">'[0-2]'</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">;</span> |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>operation result</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>+-----------------------------+-----------+------- ------------------+--------------------------+ |
| | Time|root.test.b|root.test.b LIKE '^1.*?$'|root.test.b REGEXP '[0-2]'| |
| +-----------------------------+-----------+------- ------------------+--------------------------+ |
| |1970-01-01T08:00:00.001+08:00| 111test111| true| true| |
| |1970-01-01T08:00:00.003+08:00| 333test333| false| 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="is-null-operator" tabindex="-1"><a class="header-anchor" href="#is-null-operator"><span><code>IS NULL</code> operator</span></a></h2><table><thead><tr><th>operator</th><th>meaning</th></tr></thead><tbody><tr><td><code>IS NULL</code></td><td>is a null value</td></tr><tr><td><code>IS NOT NULL</code></td><td>is not a null value</td></tr></tbody></table><p><strong>Example 1:</strong> Select data with empty values:</p><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">select</span> code <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d1 <span class="token keyword">where</span> temperature <span class="token operator">is</span> <span class="token boolean">null</span><span class="token punctuation">;</span> |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p><strong>Example 2:</strong> Select data with non-null values:</p><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">select</span> code <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d1 <span class="token keyword">where</span> temperature <span class="token operator">is</span> <span class="token operator">not</span> <span class="token boolean">null</span><span class="token punctuation">;</span> |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h2 id="in-operator" tabindex="-1"><a class="header-anchor" href="#in-operator"><span><code>IN</code> operator</span></a></h2><table><thead><tr><th>operator</th><th>meaning</th></tr></thead><tbody><tr><td><code>IN</code> / <code>CONTAINS</code></td><td>are the values in the specified list</td></tr><tr><td><code>NOT IN</code> / <code>NOT CONTAINS</code></td><td>not a value in the specified list</td></tr></tbody></table><p>Input data type: <code>All Types</code></p><p>return type <code>BOOLEAN</code></p><p>**Note: Please ensure that the values in the collection can be converted to the type of the input data. **</p><blockquote><p>For example:</p><p><code>s1 in (1, 2, 3, 'test')</code>, the data type of <code>s1</code> is <code>INT32</code></p><p>We will throw an exception because <code>'test'</code> cannot be converted to type <code>INT32</code></p></blockquote><p><strong>Example 1:</strong> Select data with values within a certain range:</p><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">select</span> code <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d1 <span class="token keyword">where</span> code <span class="token operator">in</span> <span class="token punctuation">(</span><span class="token string">'200'</span><span class="token punctuation">,</span> <span class="token string">'300'</span><span class="token punctuation">,</span> <span class="token string">'400'</span><span class="token punctuation">,</span> <span class="token string">'500'</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></div><p><strong>Example 2:</strong> Select data with values outside a certain range:</p><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">select</span> code <span class="token keyword">from</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">.</span>d1 <span class="token keyword">where</span> code <span class="token operator">not</span> <span class="token operator">in</span> <span class="token punctuation">(</span><span class="token string">'200'</span><span class="token punctuation">,</span> <span class="token string">'300'</span><span class="token punctuation">,</span> <span class="token string">'400'</span><span class="token punctuation">,</span> <span class="token string">'500'</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></div><p><strong>Example 3:</strong></p><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">select</span> a<span class="token punctuation">,</span> a <span class="token operator">in</span> <span class="token punctuation">(</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">;</span> |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Output 2:</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>+-----------------------------+-----------+------- -------------+ |
| | Time|root.test.a|root.test.a IN (1,2)| |
| +-----------------------------+-----------+------- -------------+ |
| |1970-01-01T08:00:00.001+08:00| 1| true| |
| |1970-01-01T08:00:00.003+08:00| 3| 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="condition-functions" tabindex="-1"><a class="header-anchor" href="#condition-functions"><span>Condition Functions</span></a></h2><p>Condition functions are used to check whether timeseries data points satisfy some specific condition.</p><p>They return BOOLEANs.</p><p>Currently, IoTDB supports the following condition functions:</p><table><thead><tr><th>Function Name</th><th>Allowed Input Series Data Types</th><th>Required Attributes</th><th>Output Series Data Type</th><th>Series Data Type Description</th></tr></thead><tbody><tr><td>ON_OFF</td><td>INT32 / INT64 / FLOAT / DOUBLE</td><td><code>threshold</code>: a double type variate</td><td>BOOLEAN</td><td>Return <code>ts_value >= threshold</code>.</td></tr><tr><td>IN_RANGR</td><td>INT32 / INT64 / FLOAT / DOUBLE</td><td><code>lower</code>: DOUBLE type<br><code>upper</code>: DOUBLE type</td><td>BOOLEAN</td><td>Return <code>ts_value >= lower && value <= upper</code>.</td></tr></tbody></table><p>Example Data:</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>IoTDB> select ts from root.test; |
| +-----------------------------+------------+ |
| | Time|root.test.ts| |
| +-----------------------------+------------+ |
| |1970-01-01T08:00:00.001+08:00| 1| |
| |1970-01-01T08:00:00.002+08:00| 2| |
| |1970-01-01T08:00:00.003+08:00| 3| |
| |1970-01-01T08:00:00.004+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><h5 id="test-1" tabindex="-1"><a class="header-anchor" href="#test-1"><span>Test 1</span></a></h5><p>SQL:</p><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">select</span> ts<span class="token punctuation">,</span> on_off<span class="token punctuation">(</span>ts<span class="token punctuation">,</span> <span class="token string">'threshold'</span><span class="token operator">=</span><span class="token string">'2'</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">;</span> |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Output:</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>IoTDB> select ts, on_off(ts, 'threshold'='2') from root.test; |
| +-----------------------------+------------+-------------------------------------+ |
| | Time|root.test.ts|on_off(root.test.ts, "threshold"="2")| |
| +-----------------------------+------------+-------------------------------------+ |
| |1970-01-01T08:00:00.001+08:00| 1| false| |
| |1970-01-01T08:00:00.002+08:00| 2| true| |
| |1970-01-01T08:00:00.003+08:00| 3| true| |
| |1970-01-01T08:00:00.004+08:00| 4| true| |
| +-----------------------------+------------+-------------------------------------+ |
| </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><h5 id="test-2" tabindex="-1"><a class="header-anchor" href="#test-2"><span>Test 2</span></a></h5><p>Sql:</p><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">select</span> ts<span class="token punctuation">,</span> in_range<span class="token punctuation">(</span>ts<span class="token punctuation">,</span> <span class="token string">'lower'</span><span class="token operator">=</span><span class="token string">'2'</span><span class="token punctuation">,</span> <span class="token string">'upper'</span><span class="token operator">=</span><span class="token string">'3.1'</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">;</span> |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Output:</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>IoTDB> select ts, in_range(ts,'lower'='2', 'upper'='3.1') from root.test; |
| +-----------------------------+------------+--------------------------------------------------+ |
| | Time|root.test.ts|in_range(root.test.ts, "lower"="2", "upper"="3.1")| |
| +-----------------------------+------------+--------------------------------------------------+ |
| |1970-01-01T08:00:00.001+08:00| 1| false| |
| |1970-01-01T08:00:00.002+08:00| 2| true| |
| |1970-01-01T08:00:00.003+08:00| 3| true| |
| |1970-01-01T08:00:00.004+08:00| 4| false| |
| +-----------------------------+------------+--------------------------------------------------+ |
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