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| <div class="subTitle">org.apache.drill.exec.physical.resultSet.impl</div> |
| <h2 title="Class RepeatedVectorState" class="title">Class RepeatedVectorState</h2> |
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| <li>org.apache.drill.exec.physical.resultSet.impl.RepeatedVectorState</li> |
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| <dd><a href="../../../../../../../org/apache/drill/exec/physical/resultSet/impl/VectorState.html" title="interface in org.apache.drill.exec.physical.resultSet.impl">VectorState</a></dd> |
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| <pre>public class <span class="typeNameLabel">RepeatedVectorState</span> |
| extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a> |
| implements <a href="../../../../../../../org/apache/drill/exec/physical/resultSet/impl/VectorState.html" title="interface in org.apache.drill.exec.physical.resultSet.impl">VectorState</a></pre> |
| <div class="block">Vector state for a scalar array (repeated scalar) vector. Manages both the |
| offsets vector and data vector during overflow and other operations.</div> |
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| <th class="colOne" scope="col">Constructor and Description</th> |
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| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/drill/exec/physical/resultSet/impl/RepeatedVectorState.html#RepeatedVectorState-org.apache.drill.exec.vector.accessor.ArrayWriter-org.apache.drill.exec.vector.complex.RepeatedValueVector-">RepeatedVectorState</a></span>(<a href="../../../../../../../org/apache/drill/exec/vector/accessor/ArrayWriter.html" title="interface in org.apache.drill.exec.vector.accessor">ArrayWriter</a> writer, |
| <a href="../../../../../../../org/apache/drill/exec/vector/complex/RepeatedValueVector.html" title="interface in org.apache.drill.exec.vector.complex">RepeatedValueVector</a> vector)</code> </td> |
| </tr> |
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| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/drill/exec/physical/resultSet/impl/RepeatedVectorState.html#allocate-int-">allocate</a></span>(int cardinality)</code> |
| <div class="block">Allocate a new vector with the number of elements given.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/drill/exec/physical/resultSet/impl/RepeatedVectorState.html#close--">close</a></span>()</code> |
| <div class="block">Clear the vector(s) associated with this state.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/drill/exec/physical/resultSet/impl/RepeatedVectorState.html#dump-org.apache.drill.exec.vector.accessor.impl.HierarchicalFormatter-">dump</a></span>(<a href="../../../../../../../org/apache/drill/exec/vector/accessor/impl/HierarchicalFormatter.html" title="interface in org.apache.drill.exec.vector.accessor.impl">HierarchicalFormatter</a> format)</code> </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/drill/exec/physical/resultSet/impl/RepeatedVectorState.html#harvestWithLookAhead--">harvestWithLookAhead</a></span>()</code> |
| <div class="block">A batch is being harvested after an overflow.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/drill/exec/physical/resultSet/impl/RepeatedVectorState.html#isProjected--">isProjected</a></span>()</code> |
| <div class="block">Report whether this column is projected (has materialized vectors), |
| or is unprojected (has no materialized backing.)</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/drill/exec/physical/resultSet/impl/RepeatedVectorState.html#rollover-int-">rollover</a></span>(int newCardinality)</code> |
| <div class="block">The column is a scalar or an array of scalars.</div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/drill/exec/physical/resultSet/impl/RepeatedVectorState.html#startBatchWithLookAhead--">startBatchWithLookAhead</a></span>()</code> |
| <div class="block">A new batch is starting while an look-ahead vector exists.</div> |
| </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code><T extends <a href="../../../../../../../org/apache/drill/exec/vector/ValueVector.html" title="interface in org.apache.drill.exec.vector">ValueVector</a>><br>T</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/drill/exec/physical/resultSet/impl/RepeatedVectorState.html#vector--">vector</a></span>()</code> |
| <div class="block">Underlying vector: the one presented to the consumer of the |
| result set loader.</div> |
| </td> |
| </tr> |
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| <h3>Constructor Detail</h3> |
| <a name="RepeatedVectorState-org.apache.drill.exec.vector.accessor.ArrayWriter-org.apache.drill.exec.vector.complex.RepeatedValueVector-"> |
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| <h4>RepeatedVectorState</h4> |
| <pre>public RepeatedVectorState(<a href="../../../../../../../org/apache/drill/exec/vector/accessor/ArrayWriter.html" title="interface in org.apache.drill.exec.vector.accessor">ArrayWriter</a> writer, |
| <a href="../../../../../../../org/apache/drill/exec/vector/complex/RepeatedValueVector.html" title="interface in org.apache.drill.exec.vector.complex">RepeatedValueVector</a> vector)</pre> |
| </li> |
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| <a name="vector--"> |
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| <h4>vector</h4> |
| <pre>public <T extends <a href="../../../../../../../org/apache/drill/exec/vector/ValueVector.html" title="interface in org.apache.drill.exec.vector">ValueVector</a>> T vector()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../../org/apache/drill/exec/physical/resultSet/impl/VectorState.html#vector--">VectorState</a></code></span></div> |
| <div class="block">Underlying vector: the one presented to the consumer of the |
| result set loader.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../../org/apache/drill/exec/physical/resultSet/impl/VectorState.html#vector--">vector</a></code> in interface <code><a href="../../../../../../../org/apache/drill/exec/physical/resultSet/impl/VectorState.html" title="interface in org.apache.drill.exec.physical.resultSet.impl">VectorState</a></code></dd> |
| </dl> |
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| <a name="allocate-int-"> |
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| </a> |
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| <li class="blockList"> |
| <h4>allocate</h4> |
| <pre>public int allocate(int cardinality)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../../org/apache/drill/exec/physical/resultSet/impl/VectorState.html#allocate-int-">VectorState</a></code></span></div> |
| <div class="block">Allocate a new vector with the number of elements given. If the vector |
| is an array, then the cardinality given is the number of arrays.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../../org/apache/drill/exec/physical/resultSet/impl/VectorState.html#allocate-int-">allocate</a></code> in interface <code><a href="../../../../../../../org/apache/drill/exec/physical/resultSet/impl/VectorState.html" title="interface in org.apache.drill.exec.physical.resultSet.impl">VectorState</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>cardinality</code> - number of elements desired in the allocated |
| vector</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the number of bytes allocated</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="rollover-int-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>rollover</h4> |
| <pre>public void rollover(int newCardinality)</pre> |
| <div class="block">The column is a scalar or an array of scalars. We need to roll over both the column |
| values and the offsets that point to those values. The index provided is |
| the index into the offset vector. We use that to obtain the index of the |
| values to roll-over. |
| <p> |
| Data structure: |
| <p><pre></code> |
| RepeatedVectorState (this class) |
| +- OffsetVectorState |
| . +- OffsetVectorWriter (A) |
| . +- Offset vector (B) |
| . +- Backup (e.g. look-ahead) offset vector |
| +- ValuesVectorState |
| . +- Scalar (element) writer (C) |
| . +- Data (elements) vector (D) |
| . +- Backup elements vector |
| +- Array Writer |
| . +- ColumnWriterIndex (for array as a whole) |
| . +- OffsetVectorWriter (A) |
| . . +- Offset vector (B) |
| . +- ArrayElementWriterIndex |
| . +- ScalarWriter (D) |
| . . +- ArrayElementWriterIndex |
| . . +- Scalar vector (D) |
| </code></pre> |
| <p> |
| The top group of objects point into the writer objects in the second |
| group. Letters in parens show the connections. |
| <p> |
| To perform the roll-over, we must: |
| <ul> |
| <li>Copy values from the current vectors to a set of new, look-ahead |
| vectors.</li> |
| <li>Swap buffers between the main and "backup" vectors, effectively |
| moving the "full" batch to the sidelines, putting the look-ahead vectors |
| into play in order to finish writing the current row.</li> |
| <li>Update the writers to point to the look-ahead buffers, including |
| the initial set of data copied into those vectors.</li> |
| <li>Update the vector indexes to point to the next write positions |
| after the values copied during roll-over.</li> |
| </ul></div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../../org/apache/drill/exec/physical/resultSet/impl/VectorState.html#rollover-int-">rollover</a></code> in interface <code><a href="../../../../../../../org/apache/drill/exec/physical/resultSet/impl/VectorState.html" title="interface in org.apache.drill.exec.physical.resultSet.impl">VectorState</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>newCardinality</code> - the number of outer elements to create in the look-ahead |
| vector</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="harvestWithLookAhead--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>harvestWithLookAhead</h4> |
| <pre>public void harvestWithLookAhead()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../../org/apache/drill/exec/physical/resultSet/impl/VectorState.html#harvestWithLookAhead--">VectorState</a></code></span></div> |
| <div class="block">A batch is being harvested after an overflow. Put the full batch |
| back into the main vector so it can be harvested.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../../org/apache/drill/exec/physical/resultSet/impl/VectorState.html#harvestWithLookAhead--">harvestWithLookAhead</a></code> in interface <code><a href="../../../../../../../org/apache/drill/exec/physical/resultSet/impl/VectorState.html" title="interface in org.apache.drill.exec.physical.resultSet.impl">VectorState</a></code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="startBatchWithLookAhead--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>startBatchWithLookAhead</h4> |
| <pre>public void startBatchWithLookAhead()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../../org/apache/drill/exec/physical/resultSet/impl/VectorState.html#startBatchWithLookAhead--">VectorState</a></code></span></div> |
| <div class="block">A new batch is starting while an look-ahead vector exists. Move |
| the look-ahead buffers into the main vector to prepare for writing |
| the rest of the batch.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../../org/apache/drill/exec/physical/resultSet/impl/VectorState.html#startBatchWithLookAhead--">startBatchWithLookAhead</a></code> in interface <code><a href="../../../../../../../org/apache/drill/exec/physical/resultSet/impl/VectorState.html" title="interface in org.apache.drill.exec.physical.resultSet.impl">VectorState</a></code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="close--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>close</h4> |
| <pre>public void close()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../../org/apache/drill/exec/physical/resultSet/impl/VectorState.html#close--">VectorState</a></code></span></div> |
| <div class="block">Clear the vector(s) associated with this state.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../../org/apache/drill/exec/physical/resultSet/impl/VectorState.html#close--">close</a></code> in interface <code><a href="../../../../../../../org/apache/drill/exec/physical/resultSet/impl/VectorState.html" title="interface in org.apache.drill.exec.physical.resultSet.impl">VectorState</a></code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="isProjected--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>isProjected</h4> |
| <pre>public boolean isProjected()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../../org/apache/drill/exec/physical/resultSet/impl/VectorState.html#isProjected--">VectorState</a></code></span></div> |
| <div class="block">Report whether this column is projected (has materialized vectors), |
| or is unprojected (has no materialized backing.)</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../../org/apache/drill/exec/physical/resultSet/impl/VectorState.html#isProjected--">isProjected</a></code> in interface <code><a href="../../../../../../../org/apache/drill/exec/physical/resultSet/impl/VectorState.html" title="interface in org.apache.drill.exec.physical.resultSet.impl">VectorState</a></code></dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>true if the column is projected to the output, false if |
| not</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="dump-org.apache.drill.exec.vector.accessor.impl.HierarchicalFormatter-"> |
| <!-- --> |
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| <h4>dump</h4> |
| <pre>public void dump(<a href="../../../../../../../org/apache/drill/exec/vector/accessor/impl/HierarchicalFormatter.html" title="interface in org.apache.drill.exec.vector.accessor.impl">HierarchicalFormatter</a> format)</pre> |
| <dl> |
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| <dd><code><a href="../../../../../../../org/apache/drill/exec/physical/resultSet/impl/VectorState.html#dump-org.apache.drill.exec.vector.accessor.impl.HierarchicalFormatter-">dump</a></code> in interface <code><a href="../../../../../../../org/apache/drill/exec/physical/resultSet/impl/VectorState.html" title="interface in org.apache.drill.exec.physical.resultSet.impl">VectorState</a></code></dd> |
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