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<div class="subTitle">org.apache.drill.exec.physical.rowSet</div>
<h2 title="Class TestHyperVectorReaders" class="title">Class TestHyperVectorReaders</h2>
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<pre>public class <span class="typeNameLabel">TestHyperVectorReaders</span>
extends <a href="../../../../../../org/apache/drill/test/SubOperatorTest.html" title="class in org.apache.drill.test">SubOperatorTest</a></pre>
<div class="block">Test the reader mechanism that reads rows indexed via an SV4.
SV4's introduce an additional level of indexing: each row may
come from a different batch. The readers use the SV4 to find
the root batch and vector, then must navigate downward from that
vector for maps, repeated maps, lists, unions, repeated lists,
nullable vectors and variable-length vectors.
<p>
This test does not cover repeated vectors; those tests should be added.</div>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/physical/rowSet/TestHyperVectorReaders.html#TestHyperVectorReaders--">TestHyperVectorReaders</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/physical/rowSet/TestHyperVectorReaders.html#testMap--">testMap</a></span>()</code>
<div class="block">Maps are an interesting case.</div>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/physical/rowSet/TestHyperVectorReaders.html#testOptional--">testOptional</a></span>()</code>
<div class="block">Test a nullable varchar.</div>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/physical/rowSet/TestHyperVectorReaders.html#testRepeated--">testRepeated</a></span>()</code>
<div class="block">Test an array to test the indirection from the repeated vector
to the array offsets vector and the array values vector.</div>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/physical/rowSet/TestHyperVectorReaders.html#testRepeatedMap--">testRepeatedMap</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/physical/rowSet/TestHyperVectorReaders.html#testRequired--">testRequired</a></span>()</code>
<div class="block">Test the simplest case: a top-level required vector.</div>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/physical/rowSet/TestHyperVectorReaders.html#testScalarList--">testScalarList</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/physical/rowSet/TestHyperVectorReaders.html#testUnion--">testUnion</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/physical/rowSet/TestHyperVectorReaders.html#testUnionList--">testUnionList</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/physical/rowSet/TestHyperVectorReaders.html#testVarWidth--">testVarWidth</a></span>()</code>&nbsp;</td>
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<pre>public&nbsp;TestHyperVectorReaders()</pre>
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<pre>public&nbsp;void&nbsp;testRequired()</pre>
<div class="block">Test the simplest case: a top-level required vector. Has no contained vectors.
This test focuses on the SV4 indirection mechanism itself.</div>
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<pre>public&nbsp;void&nbsp;testOptional()</pre>
<div class="block">Test a nullable varchar. Requires multiple indirections:
<ul>
<li>From the SV4 to the nullable vector.</li>
<li>From the nullable vector to the bits vector.</li>
<li>From the nullable vector to the data vector.</li>
<li>From the data vector to the offset vector.</li>
<li>From the data vector to the values vector.</li>
</ul>
All are coordinated by the vector index and vector accessors.
This test verifies that each of the indirections does, in fact,
work as expected.</div>
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<pre>public&nbsp;void&nbsp;testRepeated()</pre>
<div class="block">Test an array to test the indirection from the repeated vector
to the array offsets vector and the array values vector. (Uses
varchar to add another level of indirection to the data offset
and data values vectors.)</div>
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<pre>public&nbsp;void&nbsp;testMap()</pre>
<div class="block">Maps are an interesting case. The hyper-vector wrapper holds a mirror-image of the
map members. So, we can reach the map members either via the vector wrappers or
the original map vector.</div>
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<pre>public&nbsp;void&nbsp;testRepeatedMap()</pre>
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<pre>public&nbsp;void&nbsp;testUnion()</pre>
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<pre>public&nbsp;void&nbsp;testScalarList()</pre>
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