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182 lines
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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<u8></a><a href="#impl-FromSql">Option<T></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'>
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[<span class='inner'>−</span>]
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</a>
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</span><a class='srclink' href='../../src/rusqlite/types/from_sql.rs.html#60-62' title='goto source code'>[src]</a></span></h1>
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<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> {
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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>) -> <a class="type" href="../../rusqlite/types/type.FromSqlResult.html" title="type rusqlite::types::FromSqlResult">FromSqlResult</a><Self>;
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}</pre><div class='docblock'><p>A trait for types that can be created from a SQLite value.</p>
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<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>.
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This is intentional; SQLite returns integers as signed 64-bit values, which cannot fully
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represent the range of these types. Rusqlite would have to decide how to handle negative
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values: return an error or reinterpret as a very large postive numbers, neither of which is
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guaranteed to be correct for everyone. Callers can work around this by fetching values as i64
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and then doing the interpretation themselves or by defining a newtype and implementing
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<code>FromSql</code>/<code>ToSql</code> for it.</p>
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</div>
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<h2 id='required-methods' class='small-section-header'>
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Required Methods<a href='#required-methods' class='anchor'></a>
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</h2>
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<div class='methods'>
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<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>) -> <a class="type" href="../../rusqlite/types/type.FromSqlResult.html" title="type rusqlite::types::FromSqlResult">FromSqlResult</a><Self></code></span></h3></div>
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<h2 id='foreign-impls' class='small-section-header'>
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Implementations on Foreign Types<a href='#foreign-impls' class='anchor'></a>
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</h2>
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<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>
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<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>) -> <a class="type" href="../../rusqlite/types/type.FromSqlResult.html" title="type rusqlite::types::FromSqlResult">FromSqlResult</a><Self></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>
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</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>
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<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>) -> <a class="type" href="../../rusqlite/types/type.FromSqlResult.html" title="type rusqlite::types::FromSqlResult">FromSqlResult</a><Self></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>
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</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>
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<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>) -> <a class="type" href="../../rusqlite/types/type.FromSqlResult.html" title="type rusqlite::types::FromSqlResult">FromSqlResult</a><Self></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>
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</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>
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<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>) -> <a class="type" href="../../rusqlite/types/type.FromSqlResult.html" title="type rusqlite::types::FromSqlResult">FromSqlResult</a><Self></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>
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</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>
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<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>) -> <a class="type" href="../../rusqlite/types/type.FromSqlResult.html" title="type rusqlite::types::FromSqlResult">FromSqlResult</a><Self></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>
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</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>
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<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>) -> <a class="type" href="../../rusqlite/types/type.FromSqlResult.html" title="type rusqlite::types::FromSqlResult">FromSqlResult</a><Self></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>
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</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>
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<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>) -> <a class="type" href="../../rusqlite/types/type.FromSqlResult.html" title="type rusqlite::types::FromSqlResult">FromSqlResult</a><Self></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>
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</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>
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<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>) -> <a class="type" href="../../rusqlite/types/type.FromSqlResult.html" title="type rusqlite::types::FromSqlResult">FromSqlResult</a><Self></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>
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</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>
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<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>) -> <a class="type" href="../../rusqlite/types/type.FromSqlResult.html" title="type rusqlite::types::FromSqlResult">FromSqlResult</a><Self></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>
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</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>
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<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>) -> <a class="type" href="../../rusqlite/types/type.FromSqlResult.html" title="type rusqlite::types::FromSqlResult">FromSqlResult</a><Self></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>
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</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>
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<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>) -> <a class="type" href="../../rusqlite/types/type.FromSqlResult.html" title="type rusqlite::types::FromSqlResult">FromSqlResult</a><Self></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>
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</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><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a>></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>
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<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>) -> <a class="type" href="../../rusqlite/types/type.FromSqlResult.html" title="type rusqlite::types::FromSqlResult">FromSqlResult</a><Self></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>
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<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>) -> <a class="type" href="../../rusqlite/types/type.FromSqlResult.html" title="type rusqlite::types::FromSqlResult">FromSqlResult</a><Self></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>
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</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>
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<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>) -> <a class="type" href="../../rusqlite/types/type.FromSqlResult.html" title="type rusqlite::types::FromSqlResult">FromSqlResult</a><Self></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>
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