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150 lines
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<meta name="description" content="API documentation for the Rust `Null` struct in crate `rusqlite`.">
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<meta name="keywords" content="rust, rustlang, rust-lang, Null">
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<title>rusqlite::types::Null - Rust</title>
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<div class="sidebar-menu">☰</div>
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<p class='location'>Struct Null</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#implementations">Trait Implementations</a><div class="sidebar-links"><a href="#impl-From%3CNull%3E">From<Null></a><a href="#impl-ToSql">ToSql</a><a href="#impl-Copy">Copy</a><a href="#impl-Clone">Clone</a></div></div><p class='location'><a href='../index.html'>rusqlite</a>::<wbr><a href='index.html'>types</a></p><script>window.sidebarCurrent = {name: 'Null', ty: 'struct', relpath: ''};</script><script defer src="sidebar-items.js"></script></div>
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<section id='main' class="content">
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<h1 class='fqn'><span class='in-band'>Struct <a href='../index.html'>rusqlite</a>::<wbr><a href='index.html'>types</a>::<wbr><a class="struct" href=''>Null</a></span><span class='out-of-band'><span id='render-detail'>
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</span><a class='srclink' href='../../src/rusqlite/types/mod.rs.html#87' title='goto source code'>[src]</a></span></h1>
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<pre class='rust struct'>pub struct Null;</pre><div class='docblock'><p>Empty struct that can be used to fill in a query parameter as <code>NULL</code>.</p>
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<h2 id="example" class="section-header"><a href="#example">Example</a></h2>
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<pre class="rust rust-example-rendered">
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<span class="kw">fn</span> <span class="ident">main</span>() {
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}
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<span class="kw">fn</span> <span class="ident">insert_null</span>(<span class="ident">conn</span>: <span class="kw-2">&</span><span class="ident">Connection</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">c_int</span><span class="op">></span> {
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<span class="ident">conn</span>.<span class="ident">execute</span>(<span class="string">"INSERT INTO people (name) VALUES (?)"</span>, <span class="kw-2">&</span>[<span class="kw-2">&</span><span class="ident">Null</span>])
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}</pre>
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</div>
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<h2 id='implementations' class='small-section-header'>
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Trait Implementations<a href='#implementations' class='anchor'></a>
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</h2>
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<h3 id='impl-From%3CNull%3E' class='impl'><span class='in-band'><code>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html" title="trait core::convert::From">From</a><<a class="struct" href="../../rusqlite/types/struct.Null.html" title="struct rusqlite::types::Null">Null</a>> for <a class="enum" href="../../rusqlite/types/enum.Value.html" title="enum rusqlite::types::Value">Value</a></code><a href='#impl-From%3CNull%3E' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rusqlite/types/value.rs.html#21-25' title='goto source code'>[src]</a></span></h3>
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<div class='impl-items'><h4 id='method.from' class="method"><span id='from.v' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/core/convert/trait.From.html#tymethod.from' class='fnname'>from</a>(_: <a class="struct" href="../../rusqlite/types/struct.Null.html" title="struct rusqlite::types::Null">Null</a>) -> <a class="enum" href="../../rusqlite/types/enum.Value.html" title="enum rusqlite::types::Value">Value</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rusqlite/types/value.rs.html#22-24' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Performs the conversion.</p>
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</div></div><h3 id='impl-ToSql' class='impl'><span class='in-band'><code>impl <a class="trait" href="../../rusqlite/types/trait.ToSql.html" title="trait rusqlite::types::ToSql">ToSql</a> for <a class="struct" href="../../rusqlite/types/struct.Null.html" title="struct rusqlite::types::Null">Null</a></code><a href='#impl-ToSql' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rusqlite/types/to_sql.rs.html#63-67' title='goto source code'>[src]</a></span></h3>
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<div class='impl-items'><h4 id='method.to_sql' class="method"><span id='to_sql.v' class='invisible'><code>fn <a href='../../rusqlite/types/trait.ToSql.html#tymethod.to_sql' class='fnname'>to_sql</a>(&self) -> <a class="type" href="../../rusqlite/type.Result.html" title="type rusqlite::Result">Result</a><<a class="enum" href="../../rusqlite/types/enum.ToSqlOutput.html" title="enum rusqlite::types::ToSqlOutput">ToSqlOutput</a>></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rusqlite/types/to_sql.rs.html#64-66' title='goto source code'>[src]</a></span></h4>
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</div><h3 id='impl-Copy' class='impl'><span class='in-band'><code>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Copy.html" title="trait core::marker::Copy">Copy</a> for <a class="struct" href="../../rusqlite/types/struct.Null.html" title="struct rusqlite::types::Null">Null</a></code><a href='#impl-Copy' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rusqlite/types/mod.rs.html#86' title='goto source code'>[src]</a></span></h3>
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<div class='impl-items'></div><h3 id='impl-Clone' class='impl'><span class='in-band'><code>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a> for <a class="struct" href="../../rusqlite/types/struct.Null.html" title="struct rusqlite::types::Null">Null</a></code><a href='#impl-Clone' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rusqlite/types/mod.rs.html#86' title='goto source code'>[src]</a></span></h3>
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<div class='impl-items'><h4 id='method.clone' class="method"><span id='clone.v' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#tymethod.clone' class='fnname'>clone</a>(&self) -> <a class="struct" href="../../rusqlite/types/struct.Null.html" title="struct rusqlite::types::Null">Null</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rusqlite/types/mod.rs.html#86' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Returns a copy of the value. <a href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#tymethod.clone">Read more</a></p>
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</div><h4 id='method.clone_from' class="method"><span id='clone_from.v' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#method.clone_from' class='fnname'>clone_from</a>(&mut self, source: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&</a>Self)</code></span><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/clone.rs.html#112-114' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Performs copy-assignment from <code>source</code>. <a href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#method.clone_from">Read more</a></p>
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