294 lines
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HTML
294 lines
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RelResult Class Reference
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<article class="main-content">
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<section>
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<section class="section">
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<h1>RelResult</h1>
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<div class="declaration">
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<div class="language">
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<pre class="highlight swift"><code><span class="kd">open</span> <span class="kd">class</span> <span class="kt">RelResult</span> <span class="p">:</span> <span class="kt"><a href="../Classes/OptionalRustObject.html">OptionalRustObject</a></span></code></pre>
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</div>
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</div>
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<p>Wraps a <code>Rel</code> result from a Mentat query.
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A <code>Rel</code> result is a list of rows of <code>TypedValues</code>.
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Individual rows can be fetched or the set can be iterated.</p>
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<p>To fetch individual rows from a <code>RelResult</code> use <code>row(Int32)</code>.</p>
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<pre class="highlight swift"><code><span class="n">query</span><span class="o">.</span><span class="n">run</span> <span class="p">{</span> <span class="n">rows</span> <span class="k">in</span>
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<span class="k">let</span> <span class="nv">row1</span> <span class="o">=</span> <span class="n">rows</span><span class="o">.</span><span class="nf">row</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span>
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<span class="k">let</span> <span class="nv">row2</span> <span class="o">=</span> <span class="n">rows</span><span class="o">.</span><span class="nf">row</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span>
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<span class="p">}</span>
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</code></pre>
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<p>To iterate over the result set use standard iteration flows.</p>
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<pre class="highlight swift"><code><span class="n">query</span><span class="o">.</span><span class="n">run</span> <span class="p">{</span> <span class="n">rows</span> <span class="k">in</span>
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<span class="n">rows</span><span class="o">.</span><span class="n">forEach</span> <span class="p">{</span> <span class="n">row</span> <span class="k">in</span>
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<span class="o">...</span>
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<span class="p">}</span>
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<span class="p">}</span>
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</code></pre>
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<p>Note that iteration is consuming and can only be done once.</p>
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</section>
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<section class="section task-group-section">
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<div class="task-group">
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<ul>
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<li class="item">
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<div>
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<code>
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<a name="/s:6Mentat9RelResultC3rowAA05TupleC0CSgs5Int32V5index_tKF"></a>
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<a name="//apple_ref/swift/Method/row(index:)" class="dashAnchor"></a>
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<a class="token" href="#/s:6Mentat9RelResultC3rowAA05TupleC0CSgs5Int32V5index_tKF">row(index:)</a>
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</code>
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</div>
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<div class="height-container">
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<div class="pointer-container"></div>
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<section class="section">
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<div class="pointer"></div>
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<div class="abstract">
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<p>Fetch the row at the requested index.</p>
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<div class="aside aside-throws">
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<p class="aside-title">Throws</p>
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<p><code><a href="../Enums/PointerError.html#/s:6Mentat12PointerErrorO15pointerConsumedA2CmF">PointerError.pointerConsumed</a></code> if the result set has already been iterated.</p>
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</div>
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</div>
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<div class="declaration">
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<h4>Declaration</h4>
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<div class="language">
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<p class="aside-title">Swift</p>
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<pre class="highlight swift"><code><span class="kd">open</span> <span class="kd">func</span> <span class="nf">row</span><span class="p">(</span><span class="nv">index</span><span class="p">:</span> <span class="kt">Int32</span><span class="p">)</span> <span class="k">throws</span> <span class="o">-></span> <span class="kt"><a href="../Classes/TupleResult.html">TupleResult</a></span><span class="p">?</span></code></pre>
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</div>
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</div>
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<div>
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<h4>Parameters</h4>
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<table class="graybox">
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<tbody>
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<tr>
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<td>
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<code>
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<em>index</em>
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</code>
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</td>
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<td>
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<div>
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<p>the index of the row to be fetched</p>
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</div>
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</td>
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</tr>
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</tbody>
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</table>
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</div>
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<div>
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<h4>Return Value</h4>
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<p>The row at the requested index as a <code><a href="../Classes/TupleResult.html">TupleResult</a></code>, if present, or nil if there is no row at that index.</p>
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</div>
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</section>
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</div>
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</li>
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<li class="item">
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<div>
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<code>
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<a name="/s:6Mentat9RelResultC7cleanupys13OpaquePointerV7pointer_tF"></a>
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<a name="//apple_ref/swift/Method/cleanup(pointer:)" class="dashAnchor"></a>
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<a class="token" href="#/s:6Mentat9RelResultC7cleanupys13OpaquePointerV7pointer_tF">cleanup(pointer:)</a>
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</code>
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</div>
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<div class="height-container">
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<div class="pointer-container"></div>
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<div class="pointer"></div>
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<div class="abstract">
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<p>Undocumented</p>
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<div class="declaration">
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<h4>Declaration</h4>
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<div class="language">
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<p class="aside-title">Swift</p>
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<pre class="highlight swift"><code><span class="k">override</span> <span class="kd">open</span> <span class="kd">func</span> <span class="nf">cleanup</span><span class="p">(</span><span class="nv">pointer</span><span class="p">:</span> <span class="kt">OpaquePointer</span><span class="p">)</span></code></pre>
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</section>
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<li class="item">
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<code>
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<a name="/s:s8SequenceP12makeIterator0C0QzyF"></a>
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<a name="//apple_ref/swift/Method/makeIterator()" class="dashAnchor"></a>
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<a class="token" href="#/s:s8SequenceP12makeIterator0C0QzyF">makeIterator()</a>
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</code>
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</div>
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<div class="height-container">
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<div class="pointer-container"></div>
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<section class="section">
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<div class="pointer"></div>
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<div class="abstract">
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</div>
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<div class="declaration">
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<h4>Declaration</h4>
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<div class="language">
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<p class="aside-title">Swift</p>
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<pre class="highlight swift"><code><span class="kd">open</span> <span class="kd">func</span> <span class="nf">makeIterator</span><span class="p">()</span> <span class="o">-></span> <span class="kt"><a href="../Classes/RelResultIterator.html">RelResultIterator</a></span></code></pre>
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</section>
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</section>
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<section id="footer">
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<p>© 2018 <a class="link" href="" target="_blank" rel="external"></a>. All rights reserved. (Last updated: 2018-06-21)</p>
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<p>Generated by <a class="link" href="https://github.com/realm/jazzy" target="_blank" rel="external">jazzy ♪♫ v0.9.2</a>, a <a class="link" href="http://realm.io" target="_blank" rel="external">Realm</a> project.</p>
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