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<div class="subTitle">org.apache.drill.exec.physical.impl</div>
<h2 title="Class BaseRootExec" class="title">Class BaseRootExec</h2>
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<li>org.apache.drill.exec.physical.impl.BaseRootExec</li>
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<dl>
<dt>All Implemented Interfaces:</dt>
<dd><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/AutoCloseable.html?is-external=true" title="class or interface in java.lang">AutoCloseable</a>, <a href="../../../../../../org/apache/drill/exec/physical/impl/RootExec.html" title="interface in org.apache.drill.exec.physical.impl">RootExec</a></dd>
</dl>
<dl>
<dt>Direct Known Subclasses:</dt>
<dd><a href="../../../../../../org/apache/drill/exec/physical/impl/broadcastsender/BroadcastSenderRootExec.html" title="class in org.apache.drill.exec.physical.impl.broadcastsender">BroadcastSenderRootExec</a>, <a href="../../../../../../org/apache/drill/exec/physical/impl/partitionsender/PartitionSenderRootExec.html" title="class in org.apache.drill.exec.physical.impl.partitionsender">PartitionSenderRootExec</a>, <a href="../../../../../../org/apache/drill/exec/physical/impl/ScreenCreator.ScreenRoot.html" title="class in org.apache.drill.exec.physical.impl">ScreenCreator.ScreenRoot</a>, <a href="../../../../../../org/apache/drill/exec/physical/impl/SingleSenderCreator.SingleSenderRootExec.html" title="class in org.apache.drill.exec.physical.impl">SingleSenderCreator.SingleSenderRootExec</a></dd>
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<pre>public abstract class <span class="typeNameLabel">BaseRootExec</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/impl/RootExec.html" title="interface in org.apache.drill.exec.physical.impl">RootExec</a></pre>
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<h3>Field Summary</h3>
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<caption><span>Fields</span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Field and Description</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/physical/impl/BaseRootExec.html#ENABLE_BATCH_DUMP_CONFIG">ENABLE_BATCH_DUMP_CONFIG</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected <a href="../../../../../../org/apache/drill/exec/ops/RootFragmentContext.html" title="interface in org.apache.drill.exec.ops">RootFragmentContext</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/physical/impl/BaseRootExec.html#fragmentContext">fragmentContext</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected <a href="../../../../../../org/apache/drill/exec/ops/OperatorContext.html" title="interface in org.apache.drill.exec.ops">OperatorContext</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/physical/impl/BaseRootExec.html#oContext">oContext</a></span></code>&nbsp;</td>
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<tr class="rowColor">
<td class="colFirst"><code>protected <a href="../../../../../../org/apache/drill/exec/ops/OperatorStats.html" title="class in org.apache.drill.exec.ops">OperatorStats</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/physical/impl/BaseRootExec.html#stats">stats</a></span></code>&nbsp;</td>
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<th class="colOne" scope="col">Constructor and Description</th>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/physical/impl/BaseRootExec.html#BaseRootExec-org.apache.drill.exec.ops.RootFragmentContext-org.apache.drill.exec.ops.OperatorContext-org.apache.drill.exec.physical.base.PhysicalOperator-">BaseRootExec</a></span>(<a href="../../../../../../org/apache/drill/exec/ops/RootFragmentContext.html" title="interface in org.apache.drill.exec.ops">RootFragmentContext</a>&nbsp;fragmentContext,
<a href="../../../../../../org/apache/drill/exec/ops/OperatorContext.html" title="interface in org.apache.drill.exec.ops">OperatorContext</a>&nbsp;oContext,
<a href="../../../../../../org/apache/drill/exec/physical/base/PhysicalOperator.html" title="interface in org.apache.drill.exec.physical.base">PhysicalOperator</a>&nbsp;config)</code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/physical/impl/BaseRootExec.html#BaseRootExec-org.apache.drill.exec.ops.RootFragmentContext-org.apache.drill.exec.physical.base.PhysicalOperator-">BaseRootExec</a></span>(<a href="../../../../../../org/apache/drill/exec/ops/RootFragmentContext.html" title="interface in org.apache.drill.exec.ops">RootFragmentContext</a>&nbsp;fragmentContext,
<a href="../../../../../../org/apache/drill/exec/physical/base/PhysicalOperator.html" title="interface in org.apache.drill.exec.physical.base">PhysicalOperator</a>&nbsp;config)</code>&nbsp;</td>
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<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd">&nbsp;</span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t3" class="tableTab"><span><a href="javascript:show(4);">Abstract Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
</tr>
<tr id="i0" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/physical/impl/BaseRootExec.html#close--">close</a></span>()</code>&nbsp;</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/impl/BaseRootExec.html#dumpBatches-java.lang.Throwable-">dumpBatches</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Throwable.html?is-external=true" title="class or interface in java.lang">Throwable</a>&nbsp;t)</code>
<div class="block">Dump failed batches' state preceded by its parent's state to logs.</div>
</td>
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<tr id="i2" class="altColor">
<td class="colFirst"><code>static &lt;T&gt;&nbsp;T</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/physical/impl/BaseRootExec.html#findLeaf-java.util.List-java.lang.Throwable-">findLeaf</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;T&gt;&nbsp;dag,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Throwable.html?is-external=true" title="class or interface in java.lang">Throwable</a>&nbsp;e)</code>
<div class="block">Given a list of operators and a stack trace, walks the stack trace and
the operator list to find the leaf-most operator, which is the one
that was active when the exception was thrown.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>abstract boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/physical/impl/BaseRootExec.html#innerNext--">innerNext</a></span>()</code>&nbsp;</td>
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<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/impl/BaseRootExec.html#next--">next</a></span>()</code>
<div class="block">Do the next batch of work.</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code><a href="../../../../../../org/apache/drill/exec/record/RecordBatch.IterOutcome.html" title="enum in org.apache.drill.exec.record">RecordBatch.IterOutcome</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/physical/impl/BaseRootExec.html#next-org.apache.drill.exec.record.RecordBatch-">next</a></span>(<a href="../../../../../../org/apache/drill/exec/record/RecordBatch.html" title="interface in org.apache.drill.exec.record">RecordBatch</a>&nbsp;b)</code>&nbsp;</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/impl/BaseRootExec.html#receivingFragmentFinished-org.apache.drill.exec.proto.ExecProtos.FragmentHandle-">receivingFragmentFinished</a></span>(<a href="../../../../../../org/apache/drill/exec/proto/ExecProtos.FragmentHandle.html" title="class in org.apache.drill.exec.proto">ExecProtos.FragmentHandle</a>&nbsp;handle)</code>
<div class="block">Inform sender that receiving fragment is finished and doesn't need any more
data.</div>
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<h3>Methods inherited from class&nbsp;java.lang.<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></h3>
<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li>
</ul>
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<h3>Field Detail</h3>
<a name="ENABLE_BATCH_DUMP_CONFIG">
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<h4>ENABLE_BATCH_DUMP_CONFIG</h4>
<pre>public static final&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> ENABLE_BATCH_DUMP_CONFIG</pre>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../../../constant-values.html#org.apache.drill.exec.physical.impl.BaseRootExec.ENABLE_BATCH_DUMP_CONFIG">Constant Field Values</a></dd>
</dl>
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<h4>stats</h4>
<pre>protected&nbsp;<a href="../../../../../../org/apache/drill/exec/ops/OperatorStats.html" title="class in org.apache.drill.exec.ops">OperatorStats</a> stats</pre>
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<h4>oContext</h4>
<pre>protected&nbsp;<a href="../../../../../../org/apache/drill/exec/ops/OperatorContext.html" title="interface in org.apache.drill.exec.ops">OperatorContext</a> oContext</pre>
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<h4>fragmentContext</h4>
<pre>protected&nbsp;<a href="../../../../../../org/apache/drill/exec/ops/RootFragmentContext.html" title="interface in org.apache.drill.exec.ops">RootFragmentContext</a> fragmentContext</pre>
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<h3>Constructor Detail</h3>
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<h4>BaseRootExec</h4>
<pre>public&nbsp;BaseRootExec(<a href="../../../../../../org/apache/drill/exec/ops/RootFragmentContext.html" title="interface in org.apache.drill.exec.ops">RootFragmentContext</a>&nbsp;fragmentContext,
<a href="../../../../../../org/apache/drill/exec/physical/base/PhysicalOperator.html" title="interface in org.apache.drill.exec.physical.base">PhysicalOperator</a>&nbsp;config)
throws <a href="../../../../../../org/apache/drill/exec/exception/OutOfMemoryException.html" title="class in org.apache.drill.exec.exception">OutOfMemoryException</a></pre>
<dl>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="../../../../../../org/apache/drill/exec/exception/OutOfMemoryException.html" title="class in org.apache.drill.exec.exception">OutOfMemoryException</a></code></dd>
</dl>
</li>
</ul>
<a name="BaseRootExec-org.apache.drill.exec.ops.RootFragmentContext-org.apache.drill.exec.ops.OperatorContext-org.apache.drill.exec.physical.base.PhysicalOperator-">
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<h4>BaseRootExec</h4>
<pre>public&nbsp;BaseRootExec(<a href="../../../../../../org/apache/drill/exec/ops/RootFragmentContext.html" title="interface in org.apache.drill.exec.ops">RootFragmentContext</a>&nbsp;fragmentContext,
<a href="../../../../../../org/apache/drill/exec/ops/OperatorContext.html" title="interface in org.apache.drill.exec.ops">OperatorContext</a>&nbsp;oContext,
<a href="../../../../../../org/apache/drill/exec/physical/base/PhysicalOperator.html" title="interface in org.apache.drill.exec.physical.base">PhysicalOperator</a>&nbsp;config)
throws <a href="../../../../../../org/apache/drill/exec/exception/OutOfMemoryException.html" title="class in org.apache.drill.exec.exception">OutOfMemoryException</a></pre>
<dl>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="../../../../../../org/apache/drill/exec/exception/OutOfMemoryException.html" title="class in org.apache.drill.exec.exception">OutOfMemoryException</a></code></dd>
</dl>
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<h4>next</h4>
<pre>public final&nbsp;boolean&nbsp;next()</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../org/apache/drill/exec/physical/impl/RootExec.html#next--">RootExec</a></code></span></div>
<div class="block">Do the next batch of work.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/drill/exec/physical/impl/RootExec.html#next--">next</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/drill/exec/physical/impl/RootExec.html" title="interface in org.apache.drill.exec.physical.impl">RootExec</a></code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Whether or not additional batches of work are necessary. False
means that this fragment is done.</dd>
</dl>
</li>
</ul>
<a name="next-org.apache.drill.exec.record.RecordBatch-">
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<h4>next</h4>
<pre>public final&nbsp;<a href="../../../../../../org/apache/drill/exec/record/RecordBatch.IterOutcome.html" title="enum in org.apache.drill.exec.record">RecordBatch.IterOutcome</a>&nbsp;next(<a href="../../../../../../org/apache/drill/exec/record/RecordBatch.html" title="interface in org.apache.drill.exec.record">RecordBatch</a>&nbsp;b)</pre>
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<h4>innerNext</h4>
<pre>public abstract&nbsp;boolean&nbsp;innerNext()</pre>
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<h4>receivingFragmentFinished</h4>
<pre>public&nbsp;void&nbsp;receivingFragmentFinished(<a href="../../../../../../org/apache/drill/exec/proto/ExecProtos.FragmentHandle.html" title="class in org.apache.drill.exec.proto">ExecProtos.FragmentHandle</a>&nbsp;handle)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../org/apache/drill/exec/physical/impl/RootExec.html#receivingFragmentFinished-org.apache.drill.exec.proto.ExecProtos.FragmentHandle-">RootExec</a></code></span></div>
<div class="block">Inform sender that receiving fragment is finished and doesn't need any more
data. This can be called multiple times (once for each downstream
receiver). If all receivers are finished then a subsequent call to
<a href="../../../../../../org/apache/drill/exec/physical/impl/RootExec.html#next--"><code>RootExec.next()</code></a> will return false.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/drill/exec/physical/impl/RootExec.html#receivingFragmentFinished-org.apache.drill.exec.proto.ExecProtos.FragmentHandle-">receivingFragmentFinished</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/drill/exec/physical/impl/RootExec.html" title="interface in org.apache.drill.exec.physical.impl">RootExec</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>handle</code> - The handle pointing to the downstream receiver that does not need
anymore data.</dd>
</dl>
</li>
</ul>
<a name="dumpBatches-java.lang.Throwable-">
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<h4>dumpBatches</h4>
<pre>public&nbsp;void&nbsp;dumpBatches(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Throwable.html?is-external=true" title="class or interface in java.lang">Throwable</a>&nbsp;t)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../org/apache/drill/exec/physical/impl/RootExec.html#dumpBatches-java.lang.Throwable-">RootExec</a></code></span></div>
<div class="block">Dump failed batches' state preceded by its parent's state to logs. Invoked
when there is a failure during fragment execution.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/drill/exec/physical/impl/RootExec.html#dumpBatches-java.lang.Throwable-">dumpBatches</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/drill/exec/physical/impl/RootExec.html" title="interface in org.apache.drill.exec.physical.impl">RootExec</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>t</code> - the exception thrown by an operator and which therefore
records, in its stack trace, which operators were active on the stack</dd>
</dl>
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<a name="close--">
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<ul class="blockList">
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<h4>close</h4>
<pre>public&nbsp;void&nbsp;close()
throws <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></pre>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/AutoCloseable.html?is-external=true#close--" title="class or interface in java.lang">close</a></code>&nbsp;in interface&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/AutoCloseable.html?is-external=true" title="class or interface in java.lang">AutoCloseable</a></code></dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></code></dd>
</dl>
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<a name="findLeaf-java.util.List-java.lang.Throwable-">
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<h4>findLeaf</h4>
<pre>public static&nbsp;&lt;T&gt;&nbsp;T&nbsp;findLeaf(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;T&gt;&nbsp;dag,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Throwable.html?is-external=true" title="class or interface in java.lang">Throwable</a>&nbsp;e)</pre>
<div class="block">Given a list of operators and a stack trace, walks the stack trace and
the operator list to find the leaf-most operator, which is the one
that was active when the exception was thrown. Handle the cases in
which no operator was active, each operator had multiple methods on
the stack, or the exception was thrown in some class called by
the operator.
<p>
Not all operators leave a mark in the trace. In particular if a the
call stack is only through base-class methods, then we have no way to
know the actual class during the call. This is OK because the leaf
methods are just pass-through operations, they are unlikely to fail.</div>
<dl>
<dt><span class="paramLabel">Type Parameters:</span></dt>
<dd><code>T</code> - the type of the operator. Parameterized to allow easier
testing</dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>dag</code> - the list of operators from root-most to leaf-most</dd>
<dd><code>e</code> - the exception thrown somewhere in the operator tree</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the leaf-most operator, if any</dd>
</dl>
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