mentat/rusqlite/types/trait.FromSql.html
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<p class='location'>Trait FromSql</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#required-methods">Required Methods</a><div class="sidebar-links"><a href="#tymethod.column_result">column_result</a></div><a class="sidebar-title" href="#foreign-impls">Implementations on Foreign Types</a><div class="sidebar-links"><a href="#impl-FromSql">i8</a><a href="#impl-FromSql">i16</a><a href="#impl-FromSql">i32</a><a href="#impl-FromSql">isize</a><a href="#impl-FromSql">u8</a><a href="#impl-FromSql">u16</a><a href="#impl-FromSql">u32</a><a href="#impl-FromSql">i64</a><a href="#impl-FromSql">f64</a><a href="#impl-FromSql">bool</a><a href="#impl-FromSql">String</a><a href="#impl-FromSql">Vec&lt;u8&gt;</a><a href="#impl-FromSql">Option&lt;T&gt;</a><a href="#impl-FromSql">Timespec</a></div><a class="sidebar-title" href="#implementors">Implementors</a></div><p class='location'><a href='../index.html'>rusqlite</a>::<wbr><a href='index.html'>types</a></p><script>window.sidebarCurrent = {name: 'FromSql', ty: 'trait', relpath: ''};</script><script defer src="sidebar-items.js"></script></div>
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<h1 class='fqn'><span class='in-band'>Trait <a href='../index.html'>rusqlite</a>::<wbr><a href='index.html'>types</a>::<wbr><a class="trait" href=''>FromSql</a></span><span class='out-of-band'><span id='render-detail'>
<a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">
[<span class='inner'>&#x2212;</span>]
</a>
</span><a class='srclink' href='../../src/rusqlite/types/from_sql.rs.html#60-62' title='goto source code'>[src]</a></span></h1>
<pre class='rust trait'>pub trait FromSql: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> {
fn <a href='#tymethod.column_result' class='fnname'>column_result</a>(value: <a class="enum" href="../../rusqlite/types/enum.ValueRef.html" title="enum rusqlite::types::ValueRef">ValueRef</a>) -&gt; <a class="type" href="../../rusqlite/types/type.FromSqlResult.html" title="type rusqlite::types::FromSqlResult">FromSqlResult</a>&lt;Self&gt;;
}</pre><div class='docblock'><p>A trait for types that can be created from a SQLite value.</p>
<p>Note that <code>FromSql</code> and <code>ToSql</code> are defined for most integral types, but not <code>u64</code> or <code>usize</code>.
This is intentional; SQLite returns integers as signed 64-bit values, which cannot fully
represent the range of these types. Rusqlite would have to decide how to handle negative
values: return an error or reinterpret as a very large postive numbers, neither of which is
guaranteed to be correct for everyone. Callers can work around this by fetching values as i64
and then doing the interpretation themselves or by defining a newtype and implementing
<code>FromSql</code>/<code>ToSql</code> for it.</p>
</div>
<h2 id='required-methods' class='small-section-header'>
Required Methods<a href='#required-methods' class='anchor'></a>
</h2>
<div class='methods'>
<h3 id='tymethod.column_result' class='method'><span id='column_result.v' class='invisible'><code>fn <a href='#tymethod.column_result' class='fnname'>column_result</a>(value: <a class="enum" href="../../rusqlite/types/enum.ValueRef.html" title="enum rusqlite::types::ValueRef">ValueRef</a>) -&gt; <a class="type" href="../../rusqlite/types/type.FromSqlResult.html" title="type rusqlite::types::FromSqlResult">FromSqlResult</a>&lt;Self&gt;</code></span></h3></div>
<h2 id='foreign-impls' class='small-section-header'>
Implementations on Foreign Types<a href='#foreign-impls' class='anchor'></a>
</h2>
<h3 id='impl-FromSql' class='impl'><span class='in-band'><code>impl <a class="trait" href="../../rusqlite/types/trait.FromSql.html" title="trait rusqlite::types::FromSql">FromSql</a> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i8.html">i8</a></code><a href='#impl-FromSql' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rusqlite/types/from_sql.rs.html#66-76' title='goto source code'>[src]</a></span></h3>
<span class='docblock autohide'><div class='impl-items'><h4 id='method.column_result' class="method"><span id='column_result.v-1' class='invisible'><code>fn <a href='#method.column_result' class='fnname'>column_result</a>(value: <a class="enum" href="../../rusqlite/types/enum.ValueRef.html" title="enum rusqlite::types::ValueRef">ValueRef</a>) -&gt; <a class="type" href="../../rusqlite/types/type.FromSqlResult.html" title="type rusqlite::types::FromSqlResult">FromSqlResult</a>&lt;Self&gt;</code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rusqlite/types/from_sql.rs.html#67-75' title='goto source code'>[src]</a></span></h4>
</div></span><h3 id='impl-FromSql-1' class='impl'><span class='in-band'><code>impl <a class="trait" href="../../rusqlite/types/trait.FromSql.html" title="trait rusqlite::types::FromSql">FromSql</a> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i16.html">i16</a></code><a href='#impl-FromSql-1' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rusqlite/types/from_sql.rs.html#66-76' title='goto source code'>[src]</a></span></h3>
<span class='docblock autohide'><div class='impl-items'><h4 id='method.column_result-1' class="method"><span id='column_result.v-2' class='invisible'><code>fn <a href='#method.column_result' class='fnname'>column_result</a>(value: <a class="enum" href="../../rusqlite/types/enum.ValueRef.html" title="enum rusqlite::types::ValueRef">ValueRef</a>) -&gt; <a class="type" href="../../rusqlite/types/type.FromSqlResult.html" title="type rusqlite::types::FromSqlResult">FromSqlResult</a>&lt;Self&gt;</code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rusqlite/types/from_sql.rs.html#67-75' title='goto source code'>[src]</a></span></h4>
</div></span><h3 id='impl-FromSql-2' class='impl'><span class='in-band'><code>impl <a class="trait" href="../../rusqlite/types/trait.FromSql.html" title="trait rusqlite::types::FromSql">FromSql</a> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i32.html">i32</a></code><a href='#impl-FromSql-2' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rusqlite/types/from_sql.rs.html#66-76' title='goto source code'>[src]</a></span></h3>
<span class='docblock autohide'><div class='impl-items'><h4 id='method.column_result-2' class="method"><span id='column_result.v-3' class='invisible'><code>fn <a href='#method.column_result' class='fnname'>column_result</a>(value: <a class="enum" href="../../rusqlite/types/enum.ValueRef.html" title="enum rusqlite::types::ValueRef">ValueRef</a>) -&gt; <a class="type" href="../../rusqlite/types/type.FromSqlResult.html" title="type rusqlite::types::FromSqlResult">FromSqlResult</a>&lt;Self&gt;</code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rusqlite/types/from_sql.rs.html#67-75' title='goto source code'>[src]</a></span></h4>
</div></span><h3 id='impl-FromSql-3' class='impl'><span class='in-band'><code>impl <a class="trait" href="../../rusqlite/types/trait.FromSql.html" title="trait rusqlite::types::FromSql">FromSql</a> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.isize.html">isize</a></code><a href='#impl-FromSql-3' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rusqlite/types/from_sql.rs.html#66-76' title='goto source code'>[src]</a></span></h3>
<span class='docblock autohide'><div class='impl-items'><h4 id='method.column_result-3' class="method"><span id='column_result.v-4' class='invisible'><code>fn <a href='#method.column_result' class='fnname'>column_result</a>(value: <a class="enum" href="../../rusqlite/types/enum.ValueRef.html" title="enum rusqlite::types::ValueRef">ValueRef</a>) -&gt; <a class="type" href="../../rusqlite/types/type.FromSqlResult.html" title="type rusqlite::types::FromSqlResult">FromSqlResult</a>&lt;Self&gt;</code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rusqlite/types/from_sql.rs.html#67-75' title='goto source code'>[src]</a></span></h4>
</div></span><h3 id='impl-FromSql-4' class='impl'><span class='in-band'><code>impl <a class="trait" href="../../rusqlite/types/trait.FromSql.html" title="trait rusqlite::types::FromSql">FromSql</a> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a></code><a href='#impl-FromSql-4' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rusqlite/types/from_sql.rs.html#66-76' title='goto source code'>[src]</a></span></h3>
<span class='docblock autohide'><div class='impl-items'><h4 id='method.column_result-4' class="method"><span id='column_result.v-5' class='invisible'><code>fn <a href='#method.column_result' class='fnname'>column_result</a>(value: <a class="enum" href="../../rusqlite/types/enum.ValueRef.html" title="enum rusqlite::types::ValueRef">ValueRef</a>) -&gt; <a class="type" href="../../rusqlite/types/type.FromSqlResult.html" title="type rusqlite::types::FromSqlResult">FromSqlResult</a>&lt;Self&gt;</code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rusqlite/types/from_sql.rs.html#67-75' title='goto source code'>[src]</a></span></h4>
</div></span><h3 id='impl-FromSql-5' class='impl'><span class='in-band'><code>impl <a class="trait" href="../../rusqlite/types/trait.FromSql.html" title="trait rusqlite::types::FromSql">FromSql</a> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u16.html">u16</a></code><a href='#impl-FromSql-5' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rusqlite/types/from_sql.rs.html#66-76' title='goto source code'>[src]</a></span></h3>
<span class='docblock autohide'><div class='impl-items'><h4 id='method.column_result-5' class="method"><span id='column_result.v-6' class='invisible'><code>fn <a href='#method.column_result' class='fnname'>column_result</a>(value: <a class="enum" href="../../rusqlite/types/enum.ValueRef.html" title="enum rusqlite::types::ValueRef">ValueRef</a>) -&gt; <a class="type" href="../../rusqlite/types/type.FromSqlResult.html" title="type rusqlite::types::FromSqlResult">FromSqlResult</a>&lt;Self&gt;</code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rusqlite/types/from_sql.rs.html#67-75' title='goto source code'>[src]</a></span></h4>
</div></span><h3 id='impl-FromSql-6' class='impl'><span class='in-band'><code>impl <a class="trait" href="../../rusqlite/types/trait.FromSql.html" title="trait rusqlite::types::FromSql">FromSql</a> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u32.html">u32</a></code><a href='#impl-FromSql-6' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rusqlite/types/from_sql.rs.html#66-76' title='goto source code'>[src]</a></span></h3>
<span class='docblock autohide'><div class='impl-items'><h4 id='method.column_result-6' class="method"><span id='column_result.v-7' class='invisible'><code>fn <a href='#method.column_result' class='fnname'>column_result</a>(value: <a class="enum" href="../../rusqlite/types/enum.ValueRef.html" title="enum rusqlite::types::ValueRef">ValueRef</a>) -&gt; <a class="type" href="../../rusqlite/types/type.FromSqlResult.html" title="type rusqlite::types::FromSqlResult">FromSqlResult</a>&lt;Self&gt;</code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rusqlite/types/from_sql.rs.html#67-75' title='goto source code'>[src]</a></span></h4>
</div></span><h3 id='impl-FromSql-7' class='impl'><span class='in-band'><code>impl <a class="trait" href="../../rusqlite/types/trait.FromSql.html" title="trait rusqlite::types::FromSql">FromSql</a> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i64.html">i64</a></code><a href='#impl-FromSql-7' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rusqlite/types/from_sql.rs.html#88-92' title='goto source code'>[src]</a></span></h3>
<span class='docblock autohide'><div class='impl-items'><h4 id='method.column_result-7' class="method"><span id='column_result.v-8' class='invisible'><code>fn <a href='#method.column_result' class='fnname'>column_result</a>(value: <a class="enum" href="../../rusqlite/types/enum.ValueRef.html" title="enum rusqlite::types::ValueRef">ValueRef</a>) -&gt; <a class="type" href="../../rusqlite/types/type.FromSqlResult.html" title="type rusqlite::types::FromSqlResult">FromSqlResult</a>&lt;Self&gt;</code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rusqlite/types/from_sql.rs.html#89-91' title='goto source code'>[src]</a></span></h4>
</div></span><h3 id='impl-FromSql-8' class='impl'><span class='in-band'><code>impl <a class="trait" href="../../rusqlite/types/trait.FromSql.html" title="trait rusqlite::types::FromSql">FromSql</a> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.f64.html">f64</a></code><a href='#impl-FromSql-8' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rusqlite/types/from_sql.rs.html#94-102' title='goto source code'>[src]</a></span></h3>
<span class='docblock autohide'><div class='impl-items'><h4 id='method.column_result-8' class="method"><span id='column_result.v-9' class='invisible'><code>fn <a href='#method.column_result' class='fnname'>column_result</a>(value: <a class="enum" href="../../rusqlite/types/enum.ValueRef.html" title="enum rusqlite::types::ValueRef">ValueRef</a>) -&gt; <a class="type" href="../../rusqlite/types/type.FromSqlResult.html" title="type rusqlite::types::FromSqlResult">FromSqlResult</a>&lt;Self&gt;</code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rusqlite/types/from_sql.rs.html#95-101' title='goto source code'>[src]</a></span></h4>
</div></span><h3 id='impl-FromSql-9' class='impl'><span class='in-band'><code>impl <a class="trait" href="../../rusqlite/types/trait.FromSql.html" title="trait rusqlite::types::FromSql">FromSql</a> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code><a href='#impl-FromSql-9' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rusqlite/types/from_sql.rs.html#104-111' title='goto source code'>[src]</a></span></h3>
<span class='docblock autohide'><div class='impl-items'><h4 id='method.column_result-9' class="method"><span id='column_result.v-10' class='invisible'><code>fn <a href='#method.column_result' class='fnname'>column_result</a>(value: <a class="enum" href="../../rusqlite/types/enum.ValueRef.html" title="enum rusqlite::types::ValueRef">ValueRef</a>) -&gt; <a class="type" href="../../rusqlite/types/type.FromSqlResult.html" title="type rusqlite::types::FromSqlResult">FromSqlResult</a>&lt;Self&gt;</code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rusqlite/types/from_sql.rs.html#105-110' title='goto source code'>[src]</a></span></h4>
</div></span><h3 id='impl-FromSql-10' class='impl'><span class='in-band'><code>impl <a class="trait" href="../../rusqlite/types/trait.FromSql.html" title="trait rusqlite::types::FromSql">FromSql</a> for <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/string/struct.String.html" title="struct alloc::string::String">String</a></code><a href='#impl-FromSql-10' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rusqlite/types/from_sql.rs.html#113-117' title='goto source code'>[src]</a></span></h3>
<span class='docblock autohide'><div class='impl-items'><h4 id='method.column_result-10' class="method"><span id='column_result.v-11' class='invisible'><code>fn <a href='#method.column_result' class='fnname'>column_result</a>(value: <a class="enum" href="../../rusqlite/types/enum.ValueRef.html" title="enum rusqlite::types::ValueRef">ValueRef</a>) -&gt; <a class="type" href="../../rusqlite/types/type.FromSqlResult.html" title="type rusqlite::types::FromSqlResult">FromSqlResult</a>&lt;Self&gt;</code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rusqlite/types/from_sql.rs.html#114-116' title='goto source code'>[src]</a></span></h4>
</div></span><h3 id='impl-FromSql-11' class='impl'><span class='in-band'><code>impl <a class="trait" href="../../rusqlite/types/trait.FromSql.html" title="trait rusqlite::types::FromSql">FromSql</a> for <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/vec/struct.Vec.html" title="struct alloc::vec::Vec">Vec</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a>&gt;</code><a href='#impl-FromSql-11' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rusqlite/types/from_sql.rs.html#119-123' title='goto source code'>[src]</a></span></h3>
<span class='docblock autohide'><div class='impl-items'><h4 id='method.column_result-11' class="method"><span id='column_result.v-12' class='invisible'><code>fn <a href='#method.column_result' class='fnname'>column_result</a>(value: <a class="enum" href="../../rusqlite/types/enum.ValueRef.html" title="enum rusqlite::types::ValueRef">ValueRef</a>) -&gt; <a class="type" href="../../rusqlite/types/type.FromSqlResult.html" title="type rusqlite::types::FromSqlResult">FromSqlResult</a>&lt;Self&gt;</code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rusqlite/types/from_sql.rs.html#120-122' title='goto source code'>[src]</a></span></h4>
</div></span><h3 id='impl-FromSql-12' class='impl'><span class='in-band'><code>impl&lt;T:&nbsp;<a class="trait" href="../../rusqlite/types/trait.FromSql.html" title="trait rusqlite::types::FromSql">FromSql</a>&gt; <a class="trait" href="../../rusqlite/types/trait.FromSql.html" title="trait rusqlite::types::FromSql">FromSql</a> for <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;T&gt;</code><a href='#impl-FromSql-12' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rusqlite/types/from_sql.rs.html#125-132' title='goto source code'>[src]</a></span></h3>
<span class='docblock autohide'><div class='impl-items'><h4 id='method.column_result-12' class="method"><span id='column_result.v-13' class='invisible'><code>fn <a href='#method.column_result' class='fnname'>column_result</a>(value: <a class="enum" href="../../rusqlite/types/enum.ValueRef.html" title="enum rusqlite::types::ValueRef">ValueRef</a>) -&gt; <a class="type" href="../../rusqlite/types/type.FromSqlResult.html" title="type rusqlite::types::FromSqlResult">FromSqlResult</a>&lt;Self&gt;</code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rusqlite/types/from_sql.rs.html#126-131' title='goto source code'>[src]</a></span></h4>
</div></span><h3 id='impl-FromSql-13' class='impl'><span class='in-band'><code>impl <a class="trait" href="../../rusqlite/types/trait.FromSql.html" title="trait rusqlite::types::FromSql">FromSql</a> for <a class="struct" href="../../time/struct.Timespec.html" title="struct time::Timespec">Timespec</a></code><a href='#impl-FromSql-13' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rusqlite/types/time.rs.html#18-27' title='goto source code'>[src]</a></span></h3>
<span class='docblock autohide'><div class='impl-items'><h4 id='method.column_result-13' class="method"><span id='column_result.v-14' class='invisible'><code>fn <a href='#method.column_result' class='fnname'>column_result</a>(value: <a class="enum" href="../../rusqlite/types/enum.ValueRef.html" title="enum rusqlite::types::ValueRef">ValueRef</a>) -&gt; <a class="type" href="../../rusqlite/types/type.FromSqlResult.html" title="type rusqlite::types::FromSqlResult">FromSqlResult</a>&lt;Self&gt;</code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rusqlite/types/time.rs.html#19-26' title='goto source code'>[src]</a></span></h4>
</div></span>
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