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     <article data-swiftype-index='true'>
       <a class='edit-link' href="https://github.com/apache/ignite-3/tree/main/docs/_docs/thin-clients/index.adoc" target="_blank">Edit</a>

             <h1>Ignite Clients</h1>

         <div id="preamble">
 <div class="sectionbody">
 <div class="paragraph">
 <p>Apache Ignite 3 clients connect to the cluster via a standard socket connection. Unlike Ignite 2.x, there is no separate Thin and Thick clients in Apache Ignite 3. All clients are 'thin'.</p>
 </div>
 <div class="paragraph">
 <p>Clients do not become a part of the cluster topology, never hold any data, and are not used as a destination for compute calculations.</p>
 </div>
 </div>
 </div>
 <div class="sect1">
 <h2 id="getting-started">Getting Started</h2>
 <div class="sectionbody">
 <div class="sect2">
 <h3 id="java-client">Java Client</h3>
 <div class="sect3">
 <h4 id="prerequisites">Prerequisites</h4>
 <div class="paragraph">
 <p>To use Java thin client, Java 11 or newer is required.</p>
 </div>
 </div>
 <div class="sect3">
 <h4 id="installation">Installation</h4>
 <div class="paragraph">
 <p>Java client can be added to your project by using maven:</p>
 </div>
 <div class="listingblock">
 <div class="content">
 <pre class="rouge highlight"><code data-lang="xml"><span class="nt">&lt;dependency&gt;</span>
     <span class="nt">&lt;groupId&gt;</span>org.apache.ignite<span class="nt">&lt;/groupId&gt;</span>
     <span class="nt">&lt;artifactId&gt;</span>ignite-client<span class="nt">&lt;/artifactId&gt;</span>
     <span class="nt">&lt;version&gt;</span>3.0.0-beta1<span class="nt">&lt;/version&gt;</span>
 <span class="nt">&lt;/dependency&gt;</span></code></pre>
 </div>
 </div>
 </div>
 </div>
 <div class="sect2">
 <h3 id="c-client">C# Client</h3>
 <div class="sect3">
 <h4 id="prerequisites-2">Prerequisites</h4>
 <div class="paragraph">
 <p>To use C# thin client, .NET 6.0 or newer is required.</p>
 </div>
 </div>
 <div class="sect3">
 <h4 id="installation-2">Installation</h4>
 <div class="paragraph">
 <p>C# client is available via NuGet. To add it, use the <code>add package</code> command:</p>
 </div>
 <div class="listingblock">
 <div class="content">
 <pre>dotnet add package Apache.Ignite --version 3.0.0-beta1</pre>
 </div>
 </div>
 </div>
 </div>
 <div class="sect2">
 <h3 id="c-client-2">C++ Client</h3>
 <div class="sect3">
 <h4 id="prerequisites-3">Prerequisites</h4>
 <div class="paragraph">
 <p>To run C++ client, you need a C++ build environment to run the <code>cmake</code> command:</p>
 </div>
 <div class="ulist">
 <ul>
 <li>
 <p>C++ compiler supporting C++ 17;</p>
 </li>
 <li>
 <p>CMake 3.10+;</p>
 </li>
 <li>
 <p>One of build systems: make, ninja, MS Visual Studio, or other;</p>
 </li>
 <li>
 <p>Conan C/C++ package manager 1.X (optional).</p>
 </li>
 </ul>
 </div>
 </div>
 <div class="sect3">
 <h4 id="installation-3">Installation</h4>
 <div class="paragraph">
 <p>The source code of the C++ client comes with the Apache Ignite 3 distribution. To build it, use the following commands:</p>
 </div>
 <code-tabs><code-tab data-tab='Windows'><div class="listingblock">
 <div class="content">
 <pre class="rouge highlight"><code data-lang="bat"><span class="nb">mkdir</span> <span class="kd">cmake</span><span class="na">-build-release
 </span><span class="nb">cd</span> <span class="kd">cmake</span><span class="na">-build-release
 </span><span class="kd">conan</span> <span class="kd">install</span> .. <span class="na">--build</span><span class="o">=</span><span class="kd">missing</span> <span class="na">-s </span><span class="kd">build_type</span><span class="o">=</span><span class="kd">Release</span>
 <span class="kd">cmake</span> ..
 <span class="kd">cmake</span> <span class="na">--build </span>. <span class="na">-j</span><span class="m">8</span></code></pre>
 </div>
 </div></code-tab><code-tab data-tab='Linux'><div class="listingblock">
 <div class="content">
 <pre class="rouge highlight"><code data-lang="bash"><span class="nb">mkdir </span>cmake-build-release
 <span class="nb">cd </span>cmake-build-release
 conan <span class="nb">install</span> .. <span class="nt">--build</span><span class="o">=</span>missing <span class="nt">-s</span> <span class="nv">build_type</span><span class="o">=</span>Release <span class="nt">-s</span> compiler.libcxx<span class="o">=</span>libstdc++11
 cmake .. <span class="nt">-DCMAKE_BUILD_TYPE</span><span class="o">=</span>Release
 cmake <span class="nt">--build</span> <span class="nb">.</span> <span class="nt">-j8</span></code></pre>
 </div>
 </div></code-tab><code-tab data-tab='MacOS'><div class="listingblock">
 <div class="content">
 <pre class="rouge highlight"><code data-lang="bash"><span class="nb">mkdir </span>cmake-build-release
 <span class="nb">cd </span>cmake-build-release
 conan <span class="nb">install</span> .. <span class="nt">--build</span><span class="o">=</span>missing <span class="nt">-s</span> <span class="nv">build_type</span><span class="o">=</span>Release <span class="nt">-s</span> compiler.libcxx<span class="o">=</span>libc++
 cmake .. <span class="nt">-DCMAKE_BUILD_TYPE</span><span class="o">=</span>Release
 cmake <span class="nt">--build</span> <span class="nb">.</span> <span class="nt">-j8</span></code></pre>
 </div>
 </div></code-tab></code-tabs>
 </div>
 </div>
 </div>
 </div>
 <div class="sect1">
 <h2 id="connecting-to-cluster">Connecting to Cluster</h2>
 <div class="sectionbody">
 <div class="paragraph">
 <p>To initialize a client, use the IgniteClient class, and provide it with the configuration:</p>
 </div>
 <code-tabs><code-tab data-tab='Java'><div class="listingblock">
 <div class="content">
 <pre class="rouge highlight"><code data-lang="java"><span class="k">try</span> <span class="o">(</span><span class="nc">IgniteClient</span> <span class="n">client</span> <span class="o">=</span> <span class="nc">IgniteClient</span><span class="o">.</span><span class="na">builder</span><span class="o">()</span>
   <span class="o">.</span><span class="na">addresses</span><span class="o">(</span><span class="s">"127.0.0.1:10800"</span><span class="o">)</span>
   <span class="o">.</span><span class="na">build</span><span class="o">()</span>
 <span class="o">)</span> <span class="o">{</span>
   <span class="c1">// Your code goes here</span>
 <span class="o">}</span></code></pre>
 </div>
 </div></code-tab><code-tab data-tab='.NET'><div class="listingblock">
 <div class="content">
 <pre class="rouge highlight"><code data-lang="csharp"><span class="kt">var</span> <span class="n">clientCfg</span> <span class="p">=</span> <span class="k">new</span> <span class="n">IgniteClientConfiguration</span>
 <span class="p">{</span>
   <span class="n">Endpoints</span> <span class="p">=</span> <span class="p">{</span> <span class="s">"127.0.0.1"</span> <span class="p">}</span>
 <span class="p">};</span>
 <span class="k">using</span> <span class="nn">var</span> <span class="n">client</span> <span class="p">=</span> <span class="k">await</span> <span class="n">IgniteClient</span><span class="p">.</span><span class="nf">StartAsync</span><span class="p">(</span><span class="n">clientCfg</span><span class="p">);</span></code></pre>
 </div>
 </div></code-tab><code-tab data-tab='C++'><div class="listingblock">
 <div class="content">
 <pre class="rouge highlight"><code data-lang="cpp"><span class="k">using</span> <span class="k">namespace</span> <span class="n">ignite</span><span class="p">;</span>

 <span class="n">ignite_client_configuration</span> <span class="n">cfg</span><span class="p">{</span><span class="s">"127.0.0.1"</span><span class="p">};</span>
 <span class="k">auto</span> <span class="n">client</span> <span class="o">=</span> <span class="n">ignite_client</span><span class="o">::</span><span class="n">start</span><span class="p">(</span><span class="n">cfg</span><span class="p">,</span> <span class="n">std</span><span class="o">::</span><span class="n">chrono</span><span class="o">::</span><span class="n">seconds</span><span class="p">(</span><span class="mi">5</span><span class="p">));</span></code></pre>
 </div>
 </div></code-tab></code-tabs>
 </div>
 </div>
 <div class="sect1">
 <h2 id="user-object-serialization">User Object Serialization</h2>
 <div class="sectionbody">
 <div class="paragraph">
 <p>Apache Ignite 3 supports mapping user objects to table tuples. This ensures that objects created in any programming language can be used for key-value operations directly.</p>
 </div>
 <div class="sect2">
 <h3 id="limitations">Limitations</h3>
 <div class="paragraph">
 <p>There are limitations to user types that can be used for such a mapping. Some limitations are common, and others are platform-specific due to the programming language used.</p>
 </div>
 <div class="ulist">
 <ul>
 <li>
 <p>Only flat field structure is supported, meaning no nesting user objects. This is because Ignite tables, and therefore tuples have flat structure themselves;</p>
 </li>
 <li>
 <p>Fields should be mapped to Ignite types;</p>
 </li>
 <li>
 <p>All fields in user type should either be mapped to Table column or explicitly excluded;</p>
 </li>
 <li>
 <p>All columns from Table should be mapped to some field in the user type;</p>
 </li>
 <li>
 <p><strong>Java only</strong>: Users should implement Mapper classes for user types for more flexibility;</p>
 </li>
 <li>
 <p><strong>.NET only</strong>: Any type (class, struct, record) is supported as long as all fields can be mapped to Ignite types;</p>
 </li>
 <li>
 <p><strong>C++ only</strong>: User has to provide marshaling functions explicitly as there is no reflection to generate them based on user type structure.</p>
 </li>
 </ul>
 </div>
 </div>
 <div class="sect2">
 <h3 id="usage-examples">Usage Examples</h3>
 <code-tabs><code-tab data-tab='Java'><div class="listingblock">
 <div class="content">
 <pre class="rouge highlight"><code data-lang="java"><span class="kd">public</span> <span class="kd">static</span> <span class="kd">class</span> <span class="nc">Account</span> <span class="o">{</span>
   <span class="kd">public</span> <span class="kt">long</span> <span class="n">id</span><span class="o">;</span>
   <span class="kd">public</span> <span class="kt">long</span> <span class="n">balance</span><span class="o">;</span>

   <span class="kd">public</span> <span class="nf">Account</span><span class="o">()</span> <span class="o">{}</span>

   <span class="kd">public</span> <span class="nf">Account</span><span class="o">(</span><span class="kt">long</span> <span class="n">balance</span><span class="o">)</span> <span class="o">{</span>
     <span class="k">this</span><span class="o">.</span><span class="na">balance</span> <span class="o">=</span> <span class="n">balance</span><span class="o">;</span>
   <span class="o">}</span>
 <span class="o">}</span></code></pre>
 </div>
 </div></code-tab><code-tab data-tab='.NET'><div class="listingblock">
 <div class="content">
 <pre class="rouge highlight"><code data-lang="csharp"><span class="k">public</span> <span class="k">class</span> <span class="nc">Account</span>
 <span class="p">{</span>
   <span class="k">public</span> <span class="kt">long</span> <span class="n">Id</span> <span class="p">{</span> <span class="k">get</span><span class="p">;</span> <span class="k">set</span><span class="p">;</span> <span class="p">}</span>
   <span class="k">public</span> <span class="kt">long</span> <span class="n">Balance</span> <span class="p">{</span> <span class="k">get</span><span class="p">;</span> <span class="k">set</span><span class="p">;</span> <span class="p">}</span>

   <span class="p">[</span><span class="n">NotMapped</span><span class="p">]</span>
   <span class="k">public</span> <span class="n">Guid</span> <span class="n">UnmappedId</span> <span class="p">{</span> <span class="k">get</span><span class="p">;</span> <span class="k">set</span><span class="p">;</span> <span class="p">}</span>
 <span class="p">}</span></code></pre>
 </div>
 </div></code-tab><code-tab data-tab='C++'><div class="listingblock">
 <div class="content">
 <pre class="rouge highlight"><code data-lang="cpp"><span class="k">struct</span> <span class="nc">account</span> <span class="p">{</span>
   <span class="n">account</span><span class="p">()</span> <span class="o">=</span> <span class="k">default</span><span class="p">;</span>
   <span class="n">account</span><span class="p">(</span><span class="n">std</span><span class="o">::</span><span class="kt">int64_t</span> <span class="n">id</span><span class="p">)</span> <span class="o">:</span> <span class="n">id</span><span class="p">(</span><span class="n">id</span><span class="p">)</span> <span class="p">{}</span>
   <span class="n">account</span><span class="p">(</span><span class="n">std</span><span class="o">::</span><span class="kt">int64_t</span> <span class="n">id</span><span class="p">,</span> <span class="n">std</span><span class="o">::</span><span class="kt">int64_t</span> <span class="n">balance</span><span class="p">)</span> <span class="o">:</span> <span class="n">id</span><span class="p">(</span><span class="n">id</span><span class="p">),</span> <span class="n">balance</span><span class="p">(</span><span class="n">balance</span><span class="p">)</span> <span class="p">{}</span>

   <span class="n">std</span><span class="o">::</span><span class="kt">int64_t</span> <span class="n">id</span><span class="p">{</span><span class="mi">0</span><span class="p">};</span>
   <span class="n">std</span><span class="o">::</span><span class="kt">int64_t</span> <span class="n">balance</span><span class="p">{</span><span class="mi">0</span><span class="p">};</span>
 <span class="p">};</span>

 <span class="k">namespace</span> <span class="n">ignite</span> <span class="p">{</span>

   <span class="k">template</span><span class="o">&lt;</span><span class="p">&gt;</span>
   <span class="n">ignite_tuple</span> <span class="n">convert_to_tuple</span><span class="p">(</span><span class="n">account</span> <span class="o">&amp;&amp;</span><span class="n">value</span><span class="p">)</span> <span class="p">{</span>
     <span class="n">ignite_tuple</span> <span class="n">tuple</span><span class="p">;</span>

     <span class="n">tuple</span><span class="p">.</span><span class="n">set</span><span class="p">(</span><span class="s">"id"</span><span class="p">,</span> <span class="n">value</span><span class="p">.</span><span class="n">id</span><span class="p">);</span>
     <span class="n">tuple</span><span class="p">.</span><span class="n">set</span><span class="p">(</span><span class="s">"balance"</span><span class="p">,</span> <span class="n">value</span><span class="p">.</span><span class="n">balance</span><span class="p">);</span>

     <span class="k">return</span> <span class="n">tuple</span><span class="p">;</span>
   <span class="p">}</span>

   <span class="k">template</span><span class="o">&lt;</span><span class="p">&gt;</span>
   <span class="n">account</span> <span class="nf">convert_from_tuple</span><span class="p">(</span><span class="n">ignite_tuple</span><span class="o">&amp;&amp;</span> <span class="n">value</span><span class="p">)</span> <span class="p">{</span>
     <span class="n">account</span> <span class="n">res</span><span class="p">;</span>

     <span class="n">res</span><span class="p">.</span><span class="n">id</span> <span class="o">=</span> <span class="n">value</span><span class="p">.</span><span class="n">get</span><span class="o">&lt;</span><span class="n">std</span><span class="o">::</span><span class="kt">int64_t</span><span class="o">&gt;</span><span class="p">(</span><span class="s">"id"</span><span class="p">);</span>

     <span class="c1">// Sometimes only key columns are returned, i.e. "id",</span>
     <span class="c1">// so we have to check whether there are any other columns.</span>
     <span class="k">if</span> <span class="p">(</span><span class="n">value</span><span class="p">.</span><span class="n">column_count</span><span class="p">()</span> <span class="o">&gt;</span> <span class="mi">1</span><span class="p">)</span>
       <span class="n">res</span><span class="p">.</span><span class="n">balance</span> <span class="o">=</span> <span class="n">value</span><span class="p">.</span><span class="n">get</span><span class="o">&lt;</span><span class="n">std</span><span class="o">::</span><span class="kt">int64_t</span><span class="o">&gt;</span><span class="p">(</span><span class="s">"balance"</span><span class="p">);</span>

     <span class="k">return</span> <span class="n">res</span><span class="p">;</span>
   <span class="p">}</span>

 <span class="p">}</span> <span class="c1">// namespace ignite</span></code></pre>
 </div>
 </div></code-tab></code-tabs>
 </div>
 </div>
 </div>
 <div class="sect1">
 <h2 id="sql-api">SQL API</h2>
 <div class="sectionbody">
 <div class="paragraph">
 <p>Apache Ignite 3 is focused on SQL, and SQL API is the primary way to work with the data. You can read more about supported SQL statements in the <a href="/docs/3.0.0-beta/sql-reference/ddl">SQL Reference</a> section. Here is how you can send SQL requests:</p>
 </div>
 <code-tabs><code-tab data-tab='Java'><div class="listingblock">
 <div class="content">
 <pre class="rouge highlight"><code data-lang="java"><span class="k">try</span> <span class="o">(</span><span class="nc">Session</span> <span class="n">session</span> <span class="o">=</span> <span class="n">client</span><span class="o">.</span><span class="na">sql</span><span class="o">().</span><span class="na">createSession</span><span class="o">())</span> <span class="o">{</span>
   <span class="nc">ResultSet</span> <span class="n">resultSet</span> <span class="o">=</span> <span class="n">session</span><span class="o">.</span><span class="na">execute</span><span class="o">(</span><span class="kc">null</span><span class="o">,</span> <span class="s">"SELECT name from POJO where id = 42"</span><span class="o">);</span>

   <span class="nc">SqlRow</span> <span class="n">row</span> <span class="o">=</span> <span class="n">resultSet</span><span class="o">.</span><span class="na">next</span><span class="o">();</span>
   <span class="k">assert</span> <span class="n">row</span><span class="o">.</span><span class="na">stringValue</span><span class="o">(</span><span class="mi">0</span><span class="o">).</span><span class="na">equals</span><span class="o">(</span><span class="s">"John Doe"</span><span class="o">);</span>
 <span class="o">}</span></code></pre>
 </div>
 </div></code-tab><code-tab data-tab='.NET'><div class="listingblock">
 <div class="content">
 <pre class="rouge highlight"><code data-lang="csharp"><span class="n">IResultSet</span><span class="p">&lt;</span><span class="n">IIgniteTuple</span><span class="p">&gt;</span> <span class="n">resultSet</span> <span class="p">=</span> <span class="k">await</span> <span class="n">client</span><span class="p">.</span><span class="n">Sql</span><span class="p">.</span><span class="nf">ExecuteAsync</span><span class="p">(</span><span class="n">transaction</span><span class="p">:</span> <span class="k">null</span><span class="p">,</span> <span class="s">"select name from tbl where id = ?"</span><span class="p">,</span> <span class="m">42</span><span class="p">);</span>
 <span class="n">List</span><span class="p">&lt;</span><span class="n">IIgniteTuple</span><span class="p">&gt;</span> <span class="n">rows</span> <span class="p">=</span> <span class="k">await</span> <span class="n">resultSet</span><span class="p">.</span><span class="nf">ToListAsync</span><span class="p">();</span>
 <span class="n">IIgniteTuple</span> <span class="n">row</span> <span class="p">=</span> <span class="n">rows</span><span class="p">.</span><span class="nf">Single</span><span class="p">();</span>
 <span class="n">Debug</span><span class="p">.</span><span class="nf">Assert</span><span class="p">(</span><span class="n">row</span><span class="p">[</span><span class="s">"name"</span><span class="p">]</span> <span class="k">as</span> <span class="kt">string</span> <span class="p">==</span> <span class="s">"John Doe"</span><span class="p">);</span></code></pre>
 </div>
 </div></code-tab><code-tab data-tab='C++'><div class="listingblock">
 <div class="content">
 <pre class="rouge highlight"><code data-lang="cpp"><span class="n">result_set</span> <span class="n">result</span> <span class="o">=</span> <span class="n">client</span><span class="p">.</span><span class="n">get_sql</span><span class="p">().</span><span class="n">execute</span><span class="p">(</span><span class="nb">nullptr</span><span class="p">,</span> <span class="p">{</span><span class="s">"select name from tbl where id = ?"</span><span class="p">},</span> <span class="p">{</span><span class="n">std</span><span class="o">::</span><span class="kt">int64_t</span><span class="p">{</span><span class="mi">42</span><span class="p">});</span>
 <span class="n">std</span><span class="o">::</span><span class="n">vector</span><span class="o">&lt;</span><span class="n">ignite_tuple</span><span class="o">&gt;</span> <span class="n">page</span> <span class="o">=</span> <span class="n">result_set</span><span class="p">.</span><span class="n">current_page</span><span class="p">();</span>
 <span class="n">ignite_tuple</span><span class="o">&amp;</span> <span class="n">row</span> <span class="o">=</span> <span class="n">page</span><span class="p">.</span><span class="n">front</span><span class="p">();</span>

 <span class="n">assert</span><span class="p">(</span><span class="n">row</span><span class="o">-&gt;</span><span class="n">get</span><span class="o">&lt;</span><span class="n">std</span><span class="o">::</span><span class="kt">int64_t</span><span class="o">&gt;</span><span class="p">(</span><span class="s">"id"</span><span class="p">)</span> <span class="o">==</span> <span class="mi">42</span><span class="p">);</span>
 <span class="n">assert</span><span class="p">(</span><span class="n">row</span><span class="o">-&gt;</span><span class="n">get</span><span class="o">&lt;</span><span class="n">std</span><span class="o">::</span><span class="n">string</span><span class="o">&gt;</span><span class="p">(</span><span class="s">"name"</span><span class="p">)</span> <span class="o">==</span> <span class="s">"John Doe"</span><span class="p">);</span></code></pre>
 </div>
 </div></code-tab></code-tabs>
 </div>
 </div>
 <div class="sect1">
 <h2 id="transactions">Transactions</h2>
 <div class="sectionbody">
 <div class="paragraph">
 <p>All table operations in Apache Ignite 3 are transactional. You can provide an explicit transaction as a first argument of any Table and SQL API call. If you do not provide an explicit transaction, an implicit one will be created for every call.</p>
 </div>
 <div class="paragraph">
 <p>Here is how you  can provide a transaction explicitly:</p>
 </div>
 <code-tabs><code-tab data-tab='Java'><div class="listingblock">
 <div class="content">
 <pre class="rouge highlight"><code data-lang="java"><span class="nc">KeyValueView</span><span class="o">&lt;</span><span class="nc">Long</span><span class="o">,</span> <span class="nc">Account</span><span class="o">&gt;</span> <span class="n">accounts</span> <span class="o">=</span>
   <span class="n">table</span><span class="o">.</span><span class="na">keyValueView</span><span class="o">(</span><span class="nc">Mapper</span><span class="o">.</span><span class="na">of</span><span class="o">(</span><span class="nc">Long</span><span class="o">.</span><span class="na">class</span><span class="o">),</span> <span class="nc">Mapper</span><span class="o">.</span><span class="na">of</span><span class="o">(</span><span class="nc">Account</span><span class="o">.</span><span class="na">class</span><span class="o">));</span>

 <span class="n">accounts</span><span class="o">.</span><span class="na">put</span><span class="o">(</span><span class="kc">null</span><span class="o">,</span> <span class="mi">42</span><span class="o">,</span> <span class="k">new</span> <span class="nc">Account</span><span class="o">(</span><span class="mi">16_000</span><span class="o">));</span>

 <span class="kt">var</span> <span class="n">tx</span> <span class="o">=</span> <span class="n">client</span><span class="o">.</span><span class="na">transactions</span><span class="o">().</span><span class="na">begin</span><span class="o">();</span>

 <span class="nc">Account</span> <span class="n">account</span> <span class="o">=</span> <span class="n">accounts</span><span class="o">.</span><span class="na">get</span><span class="o">(</span><span class="n">tx</span><span class="o">,</span> <span class="mi">42</span><span class="o">);</span>
 <span class="n">account</span><span class="o">.</span><span class="na">balance</span> <span class="o">+=</span> <span class="mi">500</span><span class="o">;</span>
 <span class="n">accounts</span><span class="o">.</span><span class="na">put</span><span class="o">(</span><span class="n">tx</span><span class="o">,</span> <span class="mi">42</span><span class="o">,</span> <span class="n">account</span><span class="o">);</span>

 <span class="k">assert</span> <span class="n">accounts</span><span class="o">.</span><span class="na">get</span><span class="o">(</span><span class="n">tx</span><span class="o">,</span> <span class="mi">42</span><span class="o">).</span><span class="na">balance</span> <span class="o">==</span> <span class="mi">16_500</span><span class="o">;</span>

 <span class="n">tx</span><span class="o">.</span><span class="na">rollback</span><span class="o">();</span>

 <span class="k">assert</span> <span class="n">accounts</span><span class="o">.</span><span class="na">get</span><span class="o">(</span><span class="n">tx</span><span class="o">,</span> <span class="mi">42</span><span class="o">).</span><span class="na">balance</span> <span class="o">==</span> <span class="mi">16_000</span><span class="o">;</span></code></pre>
 </div>
 </div></code-tab><code-tab data-tab='.NET'><div class="listingblock">
 <div class="content">
 <pre class="rouge highlight"><code data-lang="csharp"><span class="kt">var</span> <span class="n">accounts</span> <span class="p">=</span> <span class="n">table</span><span class="p">.</span><span class="n">GetKeyValueView</span><span class="p">&lt;</span><span class="kt">long</span><span class="p">,</span> <span class="n">Account</span><span class="p">&gt;();</span>
 <span class="k">await</span> <span class="n">accounts</span><span class="p">.</span><span class="nf">PutAsync</span><span class="p">(</span><span class="n">transaction</span><span class="p">:</span> <span class="k">null</span><span class="p">,</span> <span class="m">42</span><span class="p">,</span> <span class="k">new</span> <span class="nf">Account</span><span class="p">(</span><span class="m">16_000</span><span class="p">));</span>

 <span class="k">await</span> <span class="k">using</span> <span class="nn">ITransaction</span> <span class="n">tx</span> <span class="p">=</span> <span class="k">await</span> <span class="n">client</span><span class="p">.</span><span class="n">Transactions</span><span class="p">.</span><span class="nf">BeginAsync</span><span class="p">();</span>

 <span class="p">(</span><span class="n">Account</span> <span class="n">account</span><span class="p">,</span> <span class="kt">bool</span> <span class="n">hasValue</span><span class="p">)</span> <span class="p">=</span> <span class="k">await</span> <span class="n">accounts</span><span class="p">.</span><span class="nf">GetAsync</span><span class="p">(</span><span class="n">tx</span><span class="p">,</span> <span class="m">42</span><span class="p">);</span>
 <span class="n">account</span> <span class="p">=</span> <span class="n">account</span> <span class="k">with</span> <span class="p">{</span> <span class="n">Balance</span> <span class="p">=</span> <span class="n">account</span><span class="p">.</span><span class="n">Balance</span> <span class="p">+</span> <span class="m">500</span> <span class="p">};</span>

 <span class="k">await</span> <span class="n">accounts</span><span class="p">.</span><span class="nf">PutAsync</span><span class="p">(</span><span class="n">tx</span><span class="p">,</span> <span class="m">42</span><span class="p">,</span> <span class="n">account</span><span class="p">);</span>

 <span class="n">Debug</span><span class="p">.</span><span class="nf">Assert</span><span class="p">((</span><span class="k">await</span> <span class="n">accounts</span><span class="p">.</span><span class="nf">GetAsync</span><span class="p">(</span><span class="n">tx</span><span class="p">,</span> <span class="m">42</span><span class="p">)).</span><span class="n">Value</span><span class="p">.</span><span class="n">Balance</span> <span class="p">==</span> <span class="m">16_500</span><span class="p">);</span>

 <span class="k">await</span> <span class="n">tx</span><span class="p">.</span><span class="nf">RollbackAsync</span><span class="p">();</span>

 <span class="n">Debug</span><span class="p">.</span><span class="nf">Assert</span><span class="p">((</span><span class="k">await</span> <span class="n">accounts</span><span class="p">.</span><span class="nf">GetAsync</span><span class="p">(</span><span class="k">null</span><span class="p">,</span> <span class="m">42</span><span class="p">)).</span><span class="n">Value</span><span class="p">.</span><span class="n">Balance</span> <span class="p">==</span> <span class="m">16_000</span><span class="p">);</span>

 <span class="k">public</span> <span class="k">record</span> <span class="nc">Account</span><span class="p">(</span><span class="kt">decimal</span> <span class="n">Balance</span><span class="p">);</span></code></pre>
 </div>
 </div></code-tab><code-tab data-tab='C++'><div class="listingblock">
 <div class="content">
 <pre class="rouge highlight"><code data-lang="cpp"><span class="k">auto</span> <span class="n">accounts</span> <span class="o">=</span> <span class="n">table</span><span class="p">.</span><span class="n">get_key_value_view</span><span class="o">&lt;</span><span class="n">account</span><span class="p">,</span> <span class="n">account</span><span class="o">&gt;</span><span class="p">();</span>

 <span class="n">account</span> <span class="nf">init_value</span><span class="p">(</span><span class="mi">42</span><span class="p">,</span> <span class="mi">16'000</span><span class="p">);</span>
 <span class="n">accounts</span><span class="p">.</span><span class="n">put</span><span class="p">(</span><span class="nb">nullptr</span><span class="p">,</span> <span class="p">{</span><span class="mi">42</span><span class="p">},</span> <span class="n">init_value</span><span class="p">);</span>

 <span class="k">auto</span> <span class="n">tx</span> <span class="o">=</span> <span class="n">client</span><span class="p">.</span><span class="n">get_transactions</span><span class="p">().</span><span class="n">begin</span><span class="p">();</span>

 <span class="n">std</span><span class="o">::</span><span class="n">optional</span><span class="o">&lt;</span><span class="n">account</span><span class="o">&gt;</span> <span class="n">res_account</span> <span class="o">=</span> <span class="n">accounts</span><span class="p">.</span><span class="n">get</span><span class="p">(</span><span class="o">&amp;</span><span class="n">tx</span><span class="p">,</span> <span class="p">{</span><span class="mi">42</span><span class="p">});</span>
 <span class="n">res_account</span><span class="o">-&gt;</span><span class="n">balance</span> <span class="o">+=</span> <span class="mi">500</span><span class="p">;</span>
 <span class="n">accounts</span><span class="p">.</span><span class="n">put</span><span class="p">(</span><span class="o">&amp;</span><span class="n">tx</span><span class="p">,</span> <span class="p">{</span><span class="mi">42</span><span class="p">},</span> <span class="n">res_account</span><span class="p">);</span>

 <span class="n">assert</span><span class="p">(</span><span class="n">accounts</span><span class="p">.</span><span class="n">get</span><span class="p">(</span><span class="o">&amp;</span><span class="n">tx</span><span class="p">,</span> <span class="p">{</span><span class="mi">42</span><span class="p">})</span><span class="o">-&gt;</span><span class="n">balance</span> <span class="o">==</span> <span class="mi">16'500</span><span class="p">);</span>

 <span class="n">tx</span><span class="p">.</span><span class="n">rollback</span><span class="p">();</span>

 <span class="n">assert</span><span class="p">(</span><span class="n">accounts</span><span class="p">.</span><span class="n">get</span><span class="p">(</span><span class="o">&amp;</span><span class="n">tx</span><span class="p">,</span> <span class="p">{</span><span class="mi">42</span><span class="p">})</span><span class="o">-&gt;</span><span class="n">balance</span> <span class="o">==</span> <span class="mi">16'000</span><span class="p">);</span></code></pre>
 </div>
 </div></code-tab></code-tabs>
 </div>
 </div>
 <div class="sect1">
 <h2 id="table-api">Table API</h2>
 <div class="sectionbody">
 <div class="paragraph">
 <p>To execute table operations on a specific table, you need to get a specific view of the table and use one of its methods. You can only create new tables by using SQL API.</p>
 </div>
 <div class="paragraph">
 <p>When working with tables, you can use built-in Tuple type, which is a set of key-value pairs underneath, or map the data to your own types for a strongly-typed access. Here is how you can work with tables:</p>
 </div>
 <div class="sect2">
 <h3 id="getting-a-table-instance">Getting a Table Instance</h3>
 <div class="paragraph">
 <p>First, get an instance of the table. To obtain an instance of table, use the <code>IgniteTables.table(String)</code> method. You can also use <code>IgniteTables.tables()</code> method to list all existing tables.</p>
 </div>
 <code-tabs><code-tab data-tab='Java'><div class="listingblock">
 <div class="content">
 <pre class="rouge highlight"><code data-lang="java"><span class="nc">IgniteTables</span> <span class="n">tableApi</span> <span class="o">=</span> <span class="n">client</span><span class="o">.</span><span class="na">tables</span><span class="o">();</span>
 <span class="nc">List</span><span class="o">&lt;</span><span class="nc">Table</span><span class="o">&gt;</span> <span class="n">existingTables</span> <span class="o">=</span> <span class="n">tableApi</span><span class="o">.</span><span class="na">tables</span><span class="o">();</span>
 <span class="nc">Table</span> <span class="n">firstTable</span> <span class="o">=</span> <span class="n">existingTables</span><span class="o">.</span><span class="na">get</span><span class="o">(</span><span class="mi">0</span><span class="o">);</span>

 <span class="nc">Table</span> <span class="n">myTable</span> <span class="o">=</span> <span class="n">tableApi</span><span class="o">.</span><span class="na">table</span><span class="o">(</span><span class="s">"MY_TABLE"</span><span class="o">);</span></code></pre>
 </div>
 </div></code-tab><code-tab data-tab='.NET'><div class="listingblock">
 <div class="content">
 <pre class="rouge highlight"><code data-lang="csharp"><span class="kt">var</span> <span class="n">existingTables</span> <span class="p">=</span> <span class="k">await</span> <span class="n">Client</span><span class="p">.</span><span class="n">Tables</span><span class="p">.</span><span class="nf">GetTablesAsync</span><span class="p">();</span>
 <span class="kt">var</span> <span class="n">firstTable</span> <span class="p">=</span> <span class="n">existingTables</span><span class="p">[</span><span class="m">0</span><span class="p">];</span>

 <span class="kt">var</span> <span class="n">myTable</span> <span class="p">=</span> <span class="k">await</span> <span class="n">Client</span><span class="p">.</span><span class="n">Tables</span><span class="p">.</span><span class="nf">GetTableAsync</span><span class="p">(</span><span class="s">"MY_TABLE"</span><span class="p">);</span></code></pre>
 </div>
 </div></code-tab><code-tab data-tab='C++'><div class="listingblock">
 <div class="content">
 <pre class="rouge highlight"><code data-lang="cpp"><span class="k">using</span> <span class="k">namespace</span> <span class="n">ignite</span><span class="p">;</span>

 <span class="k">auto</span> <span class="n">table_api</span> <span class="o">=</span> <span class="n">client</span><span class="p">.</span><span class="n">get_tables</span><span class="p">();</span>
 <span class="n">std</span><span class="o">::</span><span class="n">vector</span><span class="o">&lt;</span><span class="n">table</span><span class="o">&gt;</span> <span class="n">existing_tables</span> <span class="o">=</span> <span class="n">table_api</span><span class="p">.</span><span class="n">get_tables</span><span class="p">();</span>
 <span class="n">table</span> <span class="n">first_table</span> <span class="o">=</span> <span class="n">existing_tables</span><span class="p">.</span><span class="n">front</span><span class="p">();</span>

 <span class="n">std</span><span class="o">::</span><span class="n">optional</span><span class="o">&lt;</span><span class="n">table</span><span class="o">&gt;</span> <span class="n">my_table</span> <span class="o">=</span> <span class="n">table_api</span><span class="p">.</span><span class="n">get_table</span><span class="p">(</span><span class="s">"MY_TABLE);</span></code></pre>
 </div>
 </div></code-tab></code-tabs>
 </div>
 <div class="sect2">
 <h3 id="basic-table-operations">Basic Table Operations</h3>
 <div class="paragraph">
 <p>Once you&#8217;ve got a table you need to get a specific view to choose how you want to operate table records.</p>
 </div>
 <div class="sect3">
 <h4 id="binary-record-view">Binary Record View</h4>
 <div class="paragraph">
 <p>A binary record view. It can be used to operate table tuples directly.</p>
 </div>
 <code-tabs><code-tab data-tab='Java'><div class="listingblock">
 <div class="content">
 <pre class="rouge highlight"><code data-lang="java"><span class="nc">RecordView</span><span class="o">&lt;</span><span class="nc">Tuple</span><span class="o">&gt;</span> <span class="n">view</span> <span class="o">=</span> <span class="n">table</span><span class="o">.</span><span class="na">recordView</span><span class="o">();</span>

 <span class="nc">Tuple</span> <span class="n">fullRecord</span> <span class="o">=</span> <span class="nc">Tuple</span><span class="o">.</span><span class="na">create</span><span class="o">()</span>
   <span class="o">.</span><span class="na">set</span><span class="o">(</span><span class="s">"id"</span><span class="o">,</span> <span class="mi">42</span><span class="o">)</span>
   <span class="o">.</span><span class="na">set</span><span class="o">(</span><span class="s">"name"</span><span class="o">,</span> <span class="s">"John Doe"</span><span class="o">);</span>

 <span class="n">view</span><span class="o">.</span><span class="na">upsert</span><span class="o">(</span><span class="kc">null</span><span class="o">,</span> <span class="n">fullRecord</span><span class="o">);</span>

 <span class="nc">Tuple</span> <span class="n">keyRecord</span> <span class="o">=</span> <span class="nc">Tuple</span><span class="o">.</span><span class="na">create</span><span class="o">().</span><span class="na">set</span><span class="o">(</span><span class="s">"id"</span><span class="o">,</span> <span class="mi">42</span><span class="o">);</span>

 <span class="nc">Tuple</span> <span class="n">resRecord</span> <span class="o">=</span> <span class="n">view</span><span class="o">.</span><span class="na">get</span><span class="o">(</span><span class="kc">null</span><span class="o">,</span> <span class="n">keyRecord</span><span class="o">);</span>

 <span class="k">assert</span> <span class="n">resRecord</span><span class="o">.</span><span class="na">columnCount</span><span class="o">()</span> <span class="o">==</span> <span class="mi">2</span><span class="o">;</span>
 <span class="k">assert</span> <span class="n">resRecord</span><span class="o">.</span><span class="na">intValue</span><span class="o">(</span><span class="s">"id"</span><span class="o">)</span> <span class="o">==</span> <span class="mi">42</span><span class="o">;</span>
 <span class="k">assert</span> <span class="n">resRecord</span><span class="o">.</span><span class="na">stringValue</span><span class="o">(</span><span class="s">"name"</span><span class="o">).</span><span class="na">equals</span><span class="o">(</span><span class="s">"John Doe"</span><span class="o">);</span></code></pre>
 </div>
 </div></code-tab><code-tab data-tab='.NET'><div class="listingblock">
 <div class="content">
 <pre class="rouge highlight"><code data-lang="csharp"><span class="n">IRecordView</span><span class="p">&lt;</span><span class="n">IIgniteTuple</span><span class="p">&gt;</span> <span class="n">view</span> <span class="p">=</span> <span class="n">table</span><span class="p">.</span><span class="n">RecordBinaryView</span><span class="p">;</span>

 <span class="n">IIgniteTuple</span> <span class="n">fullRecord</span> <span class="p">=</span> <span class="k">new</span> <span class="n">IgniteTuple</span>
 <span class="p">{</span>
   <span class="p">[</span><span class="s">"id"</span><span class="p">]</span> <span class="p">=</span> <span class="m">42</span><span class="p">,</span>
   <span class="p">[</span><span class="s">"name"</span><span class="p">]</span> <span class="p">=</span> <span class="s">"John Doe"</span>
 <span class="p">};</span>

 <span class="k">await</span> <span class="n">view</span><span class="p">.</span><span class="nf">UpsertAsync</span><span class="p">(</span><span class="n">transaction</span><span class="p">:</span> <span class="k">null</span><span class="p">,</span> <span class="n">fullRecord</span><span class="p">);</span>

 <span class="n">IIgniteTuple</span> <span class="n">keyRecord</span> <span class="p">=</span> <span class="k">new</span> <span class="n">IgniteTuple</span> <span class="p">{</span> <span class="p">[</span><span class="s">"id"</span><span class="p">]</span> <span class="p">=</span> <span class="m">42</span> <span class="p">};</span>
 <span class="p">(</span><span class="n">IIgniteTuple</span> <span class="k">value</span><span class="p">,</span> <span class="kt">bool</span> <span class="n">hasValue</span><span class="p">)</span> <span class="p">=</span> <span class="k">await</span> <span class="n">view</span><span class="p">.</span><span class="nf">GetAsync</span><span class="p">(</span><span class="n">transaction</span><span class="p">:</span> <span class="k">null</span><span class="p">,</span> <span class="n">keyRecord</span><span class="p">);</span>

 <span class="n">Debug</span><span class="p">.</span><span class="nf">Assert</span><span class="p">(</span><span class="n">hasValue</span><span class="p">);</span>
 <span class="n">Debug</span><span class="p">.</span><span class="nf">Assert</span><span class="p">(</span><span class="k">value</span><span class="p">.</span><span class="n">FieldCount</span> <span class="p">==</span> <span class="m">2</span><span class="p">);</span>
 <span class="n">Debug</span><span class="p">.</span><span class="nf">Assert</span><span class="p">(</span><span class="k">value</span><span class="p">[</span><span class="s">"id"</span><span class="p">]</span> <span class="k">as</span> <span class="kt">int</span><span class="p">?</span> <span class="p">==</span> <span class="m">42</span><span class="p">);</span>
 <span class="n">Debug</span><span class="p">.</span><span class="nf">Assert</span><span class="p">(</span><span class="k">value</span><span class="p">[</span><span class="s">"name"</span><span class="p">]</span> <span class="k">as</span> <span class="kt">string</span> <span class="p">==</span> <span class="s">"John Doe"</span><span class="p">);</span></code></pre>
 </div>
 </div></code-tab><code-tab data-tab='C++'><div class="listingblock">
 <div class="content">
 <pre class="rouge highlight"><code data-lang="cpp"><span class="n">record_view</span><span class="o">&lt;</span><span class="n">ignite_tuple</span><span class="o">&gt;</span> <span class="n">view</span> <span class="o">=</span> <span class="n">table</span><span class="p">.</span><span class="n">get_record_binary_view</span><span class="p">();</span>

 <span class="n">ignite_tuple</span> <span class="n">record</span><span class="p">{</span>
   <span class="p">{</span><span class="s">"id"</span><span class="p">,</span> <span class="mi">42</span><span class="p">},</span>
   <span class="p">{</span><span class="s">"name"</span><span class="p">,</span> <span class="s">"John Doe"</span><span class="p">}</span>
 <span class="p">};</span>

 <span class="n">view</span><span class="p">.</span><span class="n">upsert</span><span class="p">(</span><span class="nb">nullptr</span><span class="p">,</span> <span class="n">record</span><span class="p">);</span>
 <span class="n">std</span><span class="o">::</span><span class="n">optional</span><span class="o">&lt;</span><span class="n">ignite_tuple</span><span class="o">&gt;</span> <span class="n">res_record</span> <span class="o">=</span> <span class="n">view</span><span class="p">.</span><span class="n">get</span><span class="p">(</span><span class="nb">nullptr</span><span class="p">,</span> <span class="p">{</span><span class="s">"id"</span><span class="p">,</span> <span class="mi">42</span><span class="p">});</span>

 <span class="n">assert</span><span class="p">(</span><span class="n">res_record</span><span class="p">.</span><span class="n">has_value</span><span class="p">());</span>
 <span class="n">assert</span><span class="p">(</span><span class="n">res_record</span><span class="o">-&gt;</span><span class="n">column_count</span><span class="p">()</span> <span class="o">==</span> <span class="mi">2</span><span class="p">);</span>
 <span class="n">assert</span><span class="p">(</span><span class="n">res_record</span><span class="o">-&gt;</span><span class="n">get</span><span class="o">&lt;</span><span class="n">std</span><span class="o">::</span><span class="kt">int64_t</span><span class="o">&gt;</span><span class="p">(</span><span class="s">"id"</span><span class="p">)</span> <span class="o">==</span> <span class="mi">42</span><span class="p">);</span>
 <span class="n">assert</span><span class="p">(</span><span class="n">res_record</span><span class="o">-&gt;</span><span class="n">get</span><span class="o">&lt;</span><span class="n">std</span><span class="o">::</span><span class="n">string</span><span class="o">&gt;</span><span class="p">(</span><span class="s">"name"</span><span class="p">)</span> <span class="o">==</span> <span class="s">"John Doe"</span><span class="p">);</span></code></pre>
 </div>
 </div></code-tab></code-tabs>
 </div>
 <div class="sect3">
 <h4 id="record-view">Record View</h4>
 <div class="paragraph">
 <p>A record view mapped to a user type. It can be used to operate table using user objects which are mapped to table tuples.</p>
 </div>
 <code-tabs><code-tab data-tab='Java'><div class="listingblock">
 <div class="content">
 <pre class="rouge highlight"><code data-lang="java"><span class="nc">RecordView</span><span class="o">&lt;</span><span class="nc">Pojo</span><span class="o">&gt;</span> <span class="n">pojoView</span> <span class="o">=</span> <span class="n">table</span><span class="o">.</span><span class="na">recordView</span><span class="o">(</span><span class="nc">Mapper</span><span class="o">.</span><span class="na">of</span><span class="o">(</span><span class="nc">Pojo</span><span class="o">.</span><span class="na">class</span><span class="o">));</span>

 <span class="n">pojoView</span><span class="o">.</span><span class="na">upsert</span><span class="o">(</span><span class="kc">null</span><span class="o">,</span> <span class="k">new</span> <span class="nc">Pojo</span><span class="o">(</span><span class="mi">42</span><span class="o">,</span> <span class="s">"John Doe"</span><span class="o">));</span>
 <span class="nc">Pojo</span> <span class="n">resRecord</span> <span class="o">=</span> <span class="n">pojoView</span><span class="o">.</span><span class="na">get</span><span class="o">(</span><span class="kc">null</span><span class="o">,</span> <span class="k">new</span> <span class="nc">Pojo</span><span class="o">(</span><span class="mi">42</span><span class="o">));</span>

 <span class="k">assert</span> <span class="n">resRecord</span><span class="o">.</span><span class="na">id</span> <span class="o">==</span> <span class="mi">42</span><span class="o">;</span>
 <span class="k">assert</span> <span class="n">resRecord</span><span class="o">.</span><span class="na">name</span><span class="o">.</span><span class="na">equals</span><span class="o">(</span><span class="s">"John Doe"</span><span class="o">);</span></code></pre>
 </div>
 </div></code-tab><code-tab data-tab='.NET'><div class="listingblock">
 <div class="content">
 <pre class="rouge highlight"><code data-lang="csharp"><span class="kt">var</span> <span class="n">pocoView</span> <span class="p">=</span> <span class="n">table</span><span class="p">.</span><span class="n">GetRecordView</span><span class="p">&lt;</span><span class="n">Poco</span><span class="p">&gt;();</span>

 <span class="k">await</span> <span class="n">pocoView</span><span class="p">.</span><span class="nf">UpsertAsync</span><span class="p">(</span><span class="n">transaction</span><span class="p">:</span> <span class="k">null</span><span class="p">,</span> <span class="k">new</span> <span class="nf">Poco</span><span class="p">(</span><span class="m">42</span><span class="p">,</span> <span class="s">"John Doe"</span><span class="p">));</span>
 <span class="kt">var</span> <span class="p">(</span><span class="k">value</span><span class="p">,</span> <span class="n">hasValue</span><span class="p">)</span> <span class="p">=</span> <span class="k">await</span> <span class="n">pocoView</span><span class="p">.</span><span class="nf">GetAsync</span><span class="p">(</span><span class="n">transaction</span><span class="p">:</span> <span class="k">null</span><span class="p">,</span> <span class="k">new</span> <span class="nf">Poco</span><span class="p">(</span><span class="m">42</span><span class="p">));</span>

 <span class="n">Debug</span><span class="p">.</span><span class="nf">Assert</span><span class="p">(</span><span class="n">hasValue</span><span class="p">);</span>
 <span class="n">Debug</span><span class="p">.</span><span class="nf">Assert</span><span class="p">(</span><span class="k">value</span><span class="p">.</span><span class="n">Name</span> <span class="p">==</span> <span class="s">"John Doe"</span><span class="p">);</span>

 <span class="k">public</span> <span class="k">record</span> <span class="nc">Poco</span><span class="p">(</span><span class="kt">long</span> <span class="n">Id</span><span class="p">,</span> <span class="kt">string</span><span class="p">?</span> <span class="n">Name</span> <span class="p">=</span> <span class="k">null</span><span class="p">);</span></code></pre>
 </div>
 </div></code-tab><code-tab data-tab='C++'><div class="listingblock">
 <div class="content">
 <pre class="rouge highlight"><code data-lang="cpp"><span class="n">record_view</span><span class="o">&lt;</span><span class="n">person</span><span class="o">&gt;</span> <span class="n">view</span> <span class="o">=</span> <span class="n">table</span><span class="p">.</span><span class="n">get_record_view</span><span class="o">&lt;</span><span class="n">person</span><span class="o">&gt;</span><span class="p">();</span>

 <span class="n">person</span> <span class="nf">record</span><span class="p">(</span><span class="mi">42</span><span class="p">,</span> <span class="s">"John Doe"</span><span class="p">);</span>

 <span class="n">view</span><span class="p">.</span><span class="n">upsert</span><span class="p">(</span><span class="nb">nullptr</span><span class="p">,</span> <span class="n">record</span><span class="p">);</span>
 <span class="n">std</span><span class="o">::</span><span class="n">optional</span><span class="o">&lt;</span><span class="n">person</span><span class="o">&gt;</span> <span class="n">res_record</span> <span class="o">=</span> <span class="n">view</span><span class="p">.</span><span class="n">get</span><span class="p">(</span><span class="nb">nullptr</span><span class="p">,</span> <span class="n">person</span><span class="p">{</span><span class="mi">42</span><span class="p">});</span>

 <span class="n">assert</span><span class="p">(</span><span class="n">res</span><span class="p">.</span><span class="n">has_value</span><span class="p">());</span>
 <span class="n">assert</span><span class="p">(</span><span class="n">res</span><span class="o">-&gt;</span><span class="n">id</span> <span class="o">==</span> <span class="mi">42</span><span class="p">);</span>
 <span class="n">assert</span><span class="p">(</span><span class="n">res</span><span class="o">-&gt;</span><span class="n">name</span> <span class="o">==</span> <span class="s">"John Doe"</span><span class="p">);</span></code></pre>
 </div>
 </div></code-tab></code-tabs>
 </div>
 <div class="sect3">
 <h4 id="key-value-binary-view">Key-Value Binary View</h4>
 <div class="paragraph">
 <p>A binary key-value view. It can be used to operate table using key and value tuples separately.</p>
 </div>
 <code-tabs><code-tab data-tab='Java'><div class="listingblock">
 <div class="content">
 <pre class="rouge highlight"><code data-lang="java"><span class="nc">KeyValueView</span><span class="o">&lt;</span><span class="nc">Tuple</span><span class="o">,</span> <span class="nc">Tuple</span><span class="o">&gt;</span> <span class="n">kvView</span> <span class="o">=</span> <span class="n">table</span><span class="o">.</span><span class="na">keyValueView</span><span class="o">();</span>

 <span class="nc">Tuple</span> <span class="n">key</span> <span class="o">=</span> <span class="nc">Tuple</span><span class="o">.</span><span class="na">create</span><span class="o">().</span><span class="na">set</span><span class="o">(</span><span class="s">"id"</span><span class="o">,</span> <span class="mi">42</span><span class="o">)</span>
 <span class="nc">Tuple</span> <span class="n">val</span> <span class="o">=</span> <span class="nc">Tuple</span><span class="o">.</span><span class="na">create</span><span class="o">().</span><span class="na">set</span><span class="o">(</span><span class="s">"name"</span><span class="o">,</span> <span class="s">"John Doe"</span><span class="o">);</span>

 <span class="n">kvView</span><span class="o">.</span><span class="na">put</span><span class="o">(</span><span class="kc">null</span><span class="o">,</span> <span class="n">key</span><span class="o">,</span> <span class="n">val</span><span class="o">);</span>
 <span class="nc">Tuple</span> <span class="n">res</span> <span class="o">=</span> <span class="n">kvView</span><span class="o">.</span><span class="na">get</span><span class="o">(</span><span class="kc">null</span><span class="o">,</span> <span class="n">key</span><span class="o">);</span>

 <span class="k">assert</span> <span class="n">res</span><span class="o">.</span><span class="na">columnCount</span><span class="o">()</span> <span class="o">==</span> <span class="mi">1</span><span class="o">;</span>
 <span class="k">assert</span> <span class="n">res</span><span class="o">.</span><span class="na">stringValue</span><span class="o">(</span><span class="s">"name"</span><span class="o">).</span><span class="na">equals</span><span class="o">(</span><span class="s">"John Doe"</span><span class="o">);</span></code></pre>
 </div>
 </div></code-tab><code-tab data-tab='.NET'><div class="listingblock">
 <div class="content">
 <pre class="rouge highlight"><code data-lang="csharp"><span class="n">IKeyValueView</span><span class="p">&lt;</span><span class="n">IIgniteTuple</span><span class="p">,</span> <span class="n">IIgniteTuple</span><span class="p">&gt;</span> <span class="n">kvView</span> <span class="p">=</span> <span class="n">table</span><span class="p">.</span><span class="n">KeyValueBinaryView</span><span class="p">;</span>

 <span class="n">IIgniteTuple</span> <span class="n">key</span> <span class="p">=</span> <span class="k">new</span> <span class="n">IgniteTuple</span> <span class="p">{</span> <span class="p">[</span><span class="s">"id"</span><span class="p">]</span> <span class="p">=</span> <span class="m">42</span> <span class="p">};</span>
 <span class="n">IIgniteTuple</span> <span class="n">val</span> <span class="p">=</span> <span class="k">new</span> <span class="n">IgniteTuple</span> <span class="p">{</span> <span class="p">[</span><span class="s">"name"</span><span class="p">]</span> <span class="p">=</span> <span class="s">"John Doe"</span> <span class="p">};</span>

 <span class="k">await</span> <span class="n">kvView</span><span class="p">.</span><span class="nf">PutAsync</span><span class="p">(</span><span class="n">transaction</span><span class="p">:</span> <span class="k">null</span><span class="p">,</span> <span class="n">key</span><span class="p">,</span> <span class="n">val</span><span class="p">);</span>
 <span class="p">(</span><span class="n">IIgniteTuple</span><span class="p">?</span> <span class="k">value</span><span class="p">,</span> <span class="kt">bool</span> <span class="n">hasValue</span><span class="p">)</span> <span class="p">=</span> <span class="k">await</span> <span class="n">kvView</span><span class="p">.</span><span class="nf">GetAsync</span><span class="p">(</span><span class="n">transaction</span><span class="p">:</span> <span class="k">null</span><span class="p">,</span> <span class="n">key</span><span class="p">);</span>

 <span class="n">Debug</span><span class="p">.</span><span class="nf">Assert</span><span class="p">(</span><span class="n">hasValue</span><span class="p">);</span>
 <span class="n">Debug</span><span class="p">.</span><span class="nf">Assert</span><span class="p">(</span><span class="k">value</span><span class="p">.</span><span class="n">FieldCount</span> <span class="p">==</span> <span class="m">1</span><span class="p">);</span>
 <span class="n">Debug</span><span class="p">.</span><span class="nf">Assert</span><span class="p">(</span><span class="k">value</span><span class="p">[</span><span class="s">"name"</span><span class="p">]</span> <span class="k">as</span> <span class="kt">string</span> <span class="p">==</span> <span class="s">"John Doe"</span><span class="p">);</span></code></pre>
 </div>
 </div></code-tab><code-tab data-tab='C++'><div class="listingblock">
 <div class="content">
 <pre class="rouge highlight"><code data-lang="cpp"><span class="n">key_value_view</span><span class="o">&lt;</span><span class="n">ignite_tuple</span><span class="p">,</span> <span class="n">ignite_tuple</span><span class="o">&gt;</span> <span class="n">kv_view</span> <span class="o">=</span> <span class="n">table</span><span class="p">.</span><span class="n">get_key_value_binary_view</span><span class="p">();</span>

 <span class="n">ignite_tuple</span> <span class="n">key_tuple</span><span class="p">{{</span><span class="s">"id"</span><span class="p">,</span> <span class="mi">42</span><span class="p">}};</span>
 <span class="n">ignite_tuple</span> <span class="n">val_tuple</span><span class="p">{{</span><span class="s">"name"</span><span class="p">,</span> <span class="s">"John Doe"</span><span class="p">}};</span>

 <span class="n">kv_view</span><span class="p">.</span><span class="n">put</span><span class="p">(</span><span class="nb">nullptr</span><span class="p">,</span> <span class="n">key_tuple</span><span class="p">,</span> <span class="n">val_tuple</span><span class="p">);</span>
 <span class="n">std</span><span class="o">::</span><span class="n">optional</span><span class="o">&lt;</span><span class="n">ignite_tuple</span><span class="o">&gt;</span> <span class="n">res_tuple</span> <span class="o">=</span> <span class="n">kv_view</span><span class="p">.</span><span class="n">get</span><span class="p">(</span><span class="nb">nullptr</span><span class="p">,</span> <span class="n">key_tuple</span><span class="p">);</span>

 <span class="n">assert</span><span class="p">(</span><span class="n">res_tuple</span><span class="p">.</span><span class="n">has_value</span><span class="p">());</span>
 <span class="n">assert</span><span class="p">(</span><span class="n">res_tuple</span><span class="o">-&gt;</span><span class="n">column_count</span><span class="p">()</span> <span class="o">==</span> <span class="mi">2</span><span class="p">);</span>
 <span class="n">assert</span><span class="p">(</span><span class="n">res_tuple</span><span class="o">-&gt;</span><span class="n">get</span><span class="o">&lt;</span><span class="n">std</span><span class="o">::</span><span class="kt">int64_t</span><span class="o">&gt;</span><span class="p">(</span><span class="s">"id"</span><span class="p">)</span> <span class="o">==</span> <span class="mi">42</span><span class="p">);</span>
 <span class="n">assert</span><span class="p">(</span><span class="n">res_tuple</span><span class="o">-&gt;</span><span class="n">get</span><span class="o">&lt;</span><span class="n">std</span><span class="o">::</span><span class="n">string</span><span class="o">&gt;</span><span class="p">(</span><span class="s">"name"</span><span class="p">)</span> <span class="o">==</span> <span class="s">"John Doe"</span><span class="p">);</span></code></pre>
 </div>
 </div></code-tab></code-tabs>
 </div>
 <div class="sect3">
 <h4 id="key-value-view">Key-Value View</h4>
 <div class="paragraph">
 <p>A key-value view with user objects. It can be used to operate table using key and value user objects mapped to table tuples.</p>
 </div>
 <code-tabs><code-tab data-tab='Java'><div class="listingblock">
 <div class="content">
 <pre class="rouge highlight"><code data-lang="java"><span class="nc">KeyValueView</span><span class="o">&lt;</span><span class="nc">Long</span><span class="o">,</span> <span class="nc">Pojo</span><span class="o">&gt;</span> <span class="n">pojoView</span> <span class="o">=</span>
   <span class="n">table</span><span class="o">.</span><span class="na">keyValueView</span><span class="o">(</span><span class="nc">Mapper</span><span class="o">.</span><span class="na">of</span><span class="o">(</span><span class="nc">Long</span><span class="o">.</span><span class="na">class</span><span class="o">),</span> <span class="nc">Mapper</span><span class="o">.</span><span class="na">of</span><span class="o">(</span><span class="nc">Pojo</span><span class="o">.</span><span class="na">class</span><span class="o">));</span>

 <span class="n">pojoView</span><span class="o">.</span><span class="na">put</span><span class="o">(</span><span class="kc">null</span><span class="o">,</span> <span class="mi">42</span><span class="o">,</span> <span class="k">new</span> <span class="nc">Pojo</span><span class="o">(</span><span class="s">"John Doe"</span><span class="o">));</span>
 <span class="nc">Pojo</span> <span class="n">val</span> <span class="o">=</span> <span class="n">pojoView</span><span class="o">.</span><span class="na">get</span><span class="o">(</span><span class="kc">null</span><span class="o">,</span> <span class="mi">42</span><span class="o">);</span>

 <span class="k">assert</span> <span class="n">val</span><span class="o">.</span><span class="na">name</span><span class="o">.</span><span class="na">equals</span><span class="o">(</span><span class="s">"John Doe"</span><span class="o">);</span></code></pre>
 </div>
 </div></code-tab><code-tab data-tab='.NET'><div class="listingblock">
 <div class="content">
 <pre class="rouge highlight"><code data-lang="csharp"><span class="n">IKeyValueView</span><span class="p">&lt;</span><span class="kt">long</span><span class="p">,</span> <span class="n">Poco</span><span class="p">&gt;</span> <span class="n">kvView</span> <span class="p">=</span> <span class="n">table</span><span class="p">.</span><span class="n">GetKeyValueView</span><span class="p">&lt;</span><span class="kt">long</span><span class="p">,</span> <span class="n">Poco</span><span class="p">&gt;();</span>

 <span class="k">await</span> <span class="n">kvView</span><span class="p">.</span><span class="nf">PutAsync</span><span class="p">(</span><span class="n">transaction</span><span class="p">:</span> <span class="k">null</span><span class="p">,</span> <span class="m">42</span><span class="p">,</span> <span class="k">new</span> <span class="nf">Poco</span><span class="p">(</span><span class="n">Id</span><span class="p">:</span> <span class="m">0</span><span class="p">,</span> <span class="n">Name</span><span class="p">:</span> <span class="s">"John Doe"</span><span class="p">));</span>
 <span class="p">(</span><span class="n">Poco</span><span class="p">?</span> <span class="k">value</span><span class="p">,</span> <span class="kt">bool</span> <span class="n">hasValue</span><span class="p">)</span> <span class="p">=</span> <span class="k">await</span> <span class="n">kvView</span><span class="p">.</span><span class="nf">GetAsync</span><span class="p">(</span><span class="n">transaction</span><span class="p">:</span> <span class="k">null</span><span class="p">,</span> <span class="m">42</span><span class="p">);</span>

 <span class="n">Debug</span><span class="p">.</span><span class="nf">Assert</span><span class="p">(</span><span class="n">hasValue</span><span class="p">);</span>
 <span class="n">Debug</span><span class="p">.</span><span class="nf">Assert</span><span class="p">(</span><span class="k">value</span><span class="p">.</span><span class="n">Name</span> <span class="p">==</span> <span class="s">"John Doe"</span><span class="p">);</span>

 <span class="k">public</span> <span class="k">record</span> <span class="nc">Poco</span><span class="p">(</span><span class="kt">long</span> <span class="n">Id</span><span class="p">,</span> <span class="kt">string</span><span class="p">?</span> <span class="n">Name</span> <span class="p">=</span> <span class="k">null</span><span class="p">);</span></code></pre>
 </div>
 </div></code-tab><code-tab data-tab='C++'><div class="listingblock">
 <div class="content">
 <pre class="rouge highlight"><code data-lang="cpp"><span class="n">key_value_view</span><span class="o">&lt;</span><span class="n">person</span><span class="p">,</span> <span class="n">person</span><span class="o">&gt;</span> <span class="n">kv_view</span> <span class="o">=</span> <span class="n">table</span><span class="p">.</span><span class="n">get_key_value_view</span><span class="o">&lt;</span><span class="n">person</span><span class="p">,</span> <span class="n">person</span><span class="o">&gt;</span><span class="p">();</span>

 <span class="n">kv_view</span><span class="p">.</span><span class="n">put</span><span class="p">(</span><span class="nb">nullptr</span><span class="p">,</span> <span class="p">{</span><span class="mi">42</span><span class="p">},</span> <span class="p">{</span><span class="s">"John Doe"</span><span class="p">});</span>
 <span class="n">std</span><span class="o">::</span><span class="n">optional</span><span class="o">&lt;</span><span class="n">person</span><span class="o">&gt;</span> <span class="n">res</span> <span class="o">=</span> <span class="n">kv_view</span><span class="p">.</span><span class="n">get</span><span class="p">(</span><span class="nb">nullptr</span><span class="p">,</span> <span class="p">{</span><span class="mi">42</span><span class="p">});</span>

 <span class="n">assert</span><span class="p">(</span><span class="n">res</span><span class="p">.</span><span class="n">has_value</span><span class="p">());</span>
 <span class="n">assert</span><span class="p">(</span><span class="n">res</span><span class="o">-&gt;</span><span class="n">id</span> <span class="o">==</span> <span class="mi">42</span><span class="p">);</span>
 <span class="n">assert</span><span class="p">(</span><span class="n">res</span><span class="o">-&gt;</span><span class="n">name</span> <span class="o">==</span> <span class="s">"John Doe"</span><span class="p">);</span></code></pre>
 </div>
 </div></code-tab></code-tabs>
 </div>
 </div>
 </div>
 </div>
 <div class="sect1">
 <h2 id="executing-compute-tasks">Executing Compute Tasks</h2>
 <div class="sectionbody">
 <div class="paragraph">
 <p>Apache Ignite 3 clients support basic compute capabilities. You can execute compute tasks that are already deployed in the cluster.</p>
 </div>
 <div class="paragraph">
 <p>You can run a task across all cluster nodes or a specific cluster group. The deployment assumes that you create a JAR file with the compute tasks and add the JAR to the cluster nodes' classpath.</p>
 </div>
 <div class="paragraph">
 <p>The example below shows how to get access to the compute APIs and execute the compute task named <code>MyTask</code>:</p>
 </div>
 <code-tabs><code-tab data-tab='Java'><div class="listingblock">
 <div class="content">
 <pre class="rouge highlight"><code data-lang="java"><span class="nc">String</span> <span class="n">result</span> <span class="o">=</span> <span class="n">client</span><span class="o">.</span><span class="na">compute</span><span class="o">().&lt;</span><span class="nc">String</span><span class="o">&gt;</span><span class="n">execute</span><span class="o">(</span>
   <span class="n">client</span><span class="o">.</span><span class="na">clusterNodes</span><span class="o">(),</span> <span class="s">"MyTask"</span><span class="o">,</span> <span class="s">"Lorem"</span><span class="o">,</span> <span class="s">"ipsum"</span><span class="o">,</span> <span class="mi">42</span><span class="o">);</span></code></pre>
 </div>
 </div></code-tab><code-tab data-tab='.NET'><div class="listingblock">
 <div class="content">
 <pre class="rouge highlight"><code data-lang="csharp"><span class="n">IList</span><span class="p">&lt;</span><span class="n">IClusterNode</span><span class="p">&gt;</span> <span class="n">nodes</span> <span class="p">=</span> <span class="k">await</span> <span class="n">client</span><span class="p">.</span><span class="nf">GetClusterNodesAsync</span><span class="p">();</span>
 <span class="kt">string</span> <span class="n">res</span> <span class="p">=</span> <span class="k">await</span> <span class="n">client</span><span class="p">.</span><span class="n">Compute</span><span class="p">.</span><span class="n">ExecuteAsync</span><span class="p">&lt;</span><span class="kt">string</span><span class="p">&gt;(</span><span class="n">nodes</span><span class="p">,</span> <span class="s">"org.foo.bar.MyTask"</span><span class="p">,</span> <span class="m">42</span><span class="p">)</span></code></pre>
 </div>
 </div></code-tab><code-tab data-tab='C++'><div class="listingblock">
 <div class="content">
 <pre class="rouge highlight"><code data-lang="cpp"><span class="n">std</span><span class="o">::</span><span class="n">vector</span><span class="o">&lt;</span><span class="n">cluster_node</span><span class="o">&gt;</span> <span class="n">nodes</span> <span class="o">=</span> <span class="n">client</span><span class="p">.</span><span class="n">get_cluster_nodes</span><span class="p">();</span>
 <span class="n">std</span><span class="o">::</span><span class="n">optional</span><span class="o">&lt;</span><span class="n">primitive</span><span class="o">&gt;</span> <span class="n">res</span> <span class="o">=</span> <span class="n">client</span><span class="p">.</span><span class="n">get_compute</span><span class="p">().</span><span class="n">execute</span><span class="p">(</span><span class="n">nodes</span><span class="p">,</span> <span class="s">"org.foo.bar.MyTask"</span><span class="p">,</span> <span class="p">{</span><span class="mi">42</span><span class="p">})</span>
 <span class="n">std</span><span class="o">::</span><span class="n">cout</span> <span class="o">&lt;&lt;</span> <span class="n">res</span><span class="o">-&gt;</span><span class="n">get</span><span class="o">&lt;</span><span class="n">std</span><span class="o">::</span><span class="n">string</span><span class="o">&gt;</span><span class="p">()</span> <span class="o">&lt;&lt;</span> <span class="n">std</span><span class="o">::</span><span class="n">endl</span><span class="p">;</span></code></pre>
 </div>
 </div></code-tab></code-tabs>
 </div>
 </div>
 <div class="sect1">
 <h2 id="partition-awareness">Partition Awareness</h2>
 <div class="sectionbody">
 <div class="paragraph">
 <p>In Apache Ignite 3, partition awareness is enabled automatically for all clients.</p>
 </div>
 <div class="paragraph">
 <p>Data in the cluster is distributed between the nodes in a balanced manner for scalability and performance reasons. Each cluster node maintains a subset of the data, and the partition distribution map, which is used to determine the node that keeps the primary/backup copy of requested entries.</p>
 </div>
 <div class="paragraph">
 <p>Partition awareness allows the client to send query requests directly to the node that owns the queried data.</p>
 </div>
 <div class="paragraph">
 <p>Without partition awareness, an application that is connected to the cluster via a client would execute all queries and operations via a single server node that acts as a proxy for the incoming requests.
 These operations would then be re-routed to the node that stores the data that is being requested.
 This would result in a bottleneck that could prevent the application from scaling linearly.</p>
 </div>
 <div class="imageblock">
 <div class="content">
 <img src="/docs/3.0.0-beta/images/partitionawareness01.png" alt="Without Partition Awareness">
 </div>
 </div>
 <div class="paragraph">
 <p>Notice how queries must pass through the proxy server node, where they are routed to the correct node.</p>
 </div>
 <div class="paragraph">
 <p>With partition awareness in place, the client can directly route queries and operations to the primary nodes that own the data required for the queries.
 This eliminates the bottleneck, allowing the application to scale more easily.</p>
 </div>
 <div class="imageblock">
 <div class="content">
 <img src="/docs/3.0.0-beta/images/partitionawareness02.png" alt="With Partition Awareness">
 </div>
 </div>
 </div>
 </div>
         <div class="copyright">
  © 2024 The Apache Software Foundation.<br/>
 Apache, Apache Ignite, the Apache feather and the Apache Ignite logo are either registered trademarks or trademarks of The Apache Software Foundation.

 </div>

     </article>
     <nav class="right-nav" data-swiftype-index='false'>
     <div class="toc-wrapper">
     <ul class="sectlevel1">
 <li><a href="#getting-started">Getting Started</a>
 <ul class="sectlevel2">
 <li><a href="#java-client">Java Client</a>
 <ul class="sectlevel3">
 <li><a href="#prerequisites">Prerequisites</a></li>
 <li><a href="#installation">Installation</a></li>
 </ul>
 </li>
 <li><a href="#c-client">C# Client</a>
 <ul class="sectlevel3">
 <li><a href="#prerequisites-2">Prerequisites</a></li>
 <li><a href="#installation-2">Installation</a></li>
 </ul>
 </li>
 <li><a href="#c-client-2">C++ Client</a>
 <ul class="sectlevel3">
 <li><a href="#prerequisites-3">Prerequisites</a></li>
 <li><a href="#installation-3">Installation</a></li>
 </ul>
 </li>
 </ul>
 </li>
 <li><a href="#connecting-to-cluster">Connecting to Cluster</a></li>
 <li><a href="#user-object-serialization">User Object Serialization</a>
 <ul class="sectlevel2">
 <li><a href="#limitations">Limitations</a></li>
 <li><a href="#usage-examples">Usage Examples</a></li>
 </ul>
 </li>
 <li><a href="#sql-api">SQL API</a></li>
 <li><a href="#transactions">Transactions</a></li>
 <li><a href="#table-api">Table API</a>
 <ul class="sectlevel2">
 <li><a href="#getting-a-table-instance">Getting a Table Instance</a></li>
 <li><a href="#basic-table-operations">Basic Table Operations</a>
 <ul class="sectlevel3">
 <li><a href="#binary-record-view">Binary Record View</a></li>
 <li><a href="#record-view">Record View</a></li>
 <li><a href="#key-value-binary-view">Key-Value Binary View</a></li>
 <li><a href="#key-value-view">Key-Value View</a></li>
 </ul>
 </li>
 </ul>
 </li>
 <li><a href="#executing-compute-tasks">Executing Compute Tasks</a></li>
 <li><a href="#partition-awareness">Partition Awareness</a></li>
 </ul>
     </div>


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