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<div class="subTitle">org.apache.calcite.rel</div>
<h2 title="Class AbstractRelNode.RelDigestWriter" class="title">Class AbstractRelNode.RelDigestWriter</h2>
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<dt>All Implemented Interfaces:</dt>
<dd><a href="../../../../org/apache/calcite/rel/RelWriter.html" title="interface in org.apache.calcite.rel">RelWriter</a></dd>
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<dt>Enclosing class:</dt>
<dd><a href="../../../../org/apache/calcite/rel/AbstractRelNode.html" title="class in org.apache.calcite.rel">AbstractRelNode</a></dd>
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<pre>private static final class <span class="typeNameLabel">AbstractRelNode.RelDigestWriter</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/calcite/rel/RelWriter.html" title="interface in org.apache.calcite.rel">RelWriter</a></pre>
<div class="block">A writer object used exclusively for computing the digest of a RelNode.
<p>The writer is meant to be used only for computing a single digest and then thrown away.
After calling <a href="../../../../org/apache/calcite/rel/AbstractRelNode.RelDigestWriter.html#done-org.apache.calcite.rel.RelNode-"><code>done(RelNode)</code></a> the writer should be used only to obtain the computed
<a href="../../../../org/apache/calcite/rel/AbstractRelNode.RelDigestWriter.html#digest"><code>digest</code></a>. Any other action is prohibited.</p></div>
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<td class="colFirst"><code>(package private) <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/calcite/rel/AbstractRelNode.RelDigestWriter.html#digest">digest</a></span></code>&nbsp;</td>
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<tr class="rowColor">
<td class="colFirst"><code>private <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;<a href="../../../../org/apache/calcite/util/Pair.html" title="class in org.apache.calcite.util">Pair</a>&lt;<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>,<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>&gt;&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rel/AbstractRelNode.RelDigestWriter.html#values">values</a></span></code>&nbsp;</td>
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<td class="colFirst"><code>private </code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rel/AbstractRelNode.RelDigestWriter.html#RelDigestWriter--">RelDigestWriter</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code><a href="../../../../org/apache/calcite/rel/RelWriter.html" title="interface in org.apache.calcite.rel">RelWriter</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rel/AbstractRelNode.RelDigestWriter.html#done-org.apache.calcite.rel.RelNode-">done</a></span>(<a href="../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;node)</code>
<div class="block">Writes the completed explanation.</div>
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<tr id="i1" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rel/AbstractRelNode.RelDigestWriter.html#explain-org.apache.calcite.rel.RelNode-java.util.List-">explain</a></span>(<a href="../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;rel,
<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;<a href="../../../../org/apache/calcite/util/Pair.html" title="class in org.apache.calcite.util">Pair</a>&lt;<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>,<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>&gt;&gt;&nbsp;valueList)</code>
<div class="block">Prints an explanation of a node, with a list of (term, value) pairs.</div>
</td>
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<tr id="i2" class="altColor">
<td class="colFirst"><code><a href="../../../../org/apache/calcite/sql/SqlExplainLevel.html" title="enum in org.apache.calcite.sql">SqlExplainLevel</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rel/AbstractRelNode.RelDigestWriter.html#getDetailLevel--">getDetailLevel</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code><a href="../../../../org/apache/calcite/rel/RelWriter.html" title="interface in org.apache.calcite.rel">RelWriter</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rel/AbstractRelNode.RelDigestWriter.html#item-java.lang.String-java.lang.Object-">item</a></span>(<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>&nbsp;term,
<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>&nbsp;value)</code>
<div class="block">Adds an attribute to the explanation of the current node.</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>
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<h3>Methods inherited from interface&nbsp;org.apache.calcite.rel.<a href="../../../../org/apache/calcite/rel/RelWriter.html" title="interface in org.apache.calcite.rel">RelWriter</a></h3>
<code><a href="../../../../org/apache/calcite/rel/RelWriter.html#input-java.lang.String-org.apache.calcite.rel.RelNode-">input</a>, <a href="../../../../org/apache/calcite/rel/RelWriter.html#itemIf-java.lang.String-java.lang.Object-boolean-">itemIf</a>, <a href="../../../../org/apache/calcite/rel/RelWriter.html#nest--">nest</a></code></li>
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<h3>Field Detail</h3>
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<h4>values</h4>
<pre>private final&nbsp;<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;<a href="../../../../org/apache/calcite/util/Pair.html" title="class in org.apache.calcite.util">Pair</a>&lt;<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>,<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>&gt;&gt; values</pre>
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<h4>digest</h4>
<pre><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> digest</pre>
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<h4>RelDigestWriter</h4>
<pre>private&nbsp;RelDigestWriter()</pre>
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<h4>explain</h4>
<pre>public&nbsp;void&nbsp;explain(<a href="../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;rel,
<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;<a href="../../../../org/apache/calcite/util/Pair.html" title="class in org.apache.calcite.util">Pair</a>&lt;<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>,<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>&gt;&gt;&nbsp;valueList)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../org/apache/calcite/rel/RelWriter.html#explain-org.apache.calcite.rel.RelNode-java.util.List-">RelWriter</a></code></span></div>
<div class="block">Prints an explanation of a node, with a list of (term, value) pairs.
<p>The term-value pairs are generally gathered by calling
<a href="../../../../org/apache/calcite/rel/RelNode.html#explain-org.apache.calcite.rel.RelWriter-"><code>RelNode.explain(RelWriter)</code></a>.
Each sub-class of <a href="../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel"><code>RelNode</code></a>
calls <a href="../../../../org/apache/calcite/rel/RelWriter.html#input-java.lang.String-org.apache.calcite.rel.RelNode-"><code>RelWriter.input(String, org.apache.calcite.rel.RelNode)</code></a>
and <a href="../../../../org/apache/calcite/rel/RelWriter.html#item-java.lang.String-java.lang.Object-"><code>RelWriter.item(String, Object)</code></a> to declare term-value pairs.</p></div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../org/apache/calcite/rel/RelWriter.html#explain-org.apache.calcite.rel.RelNode-java.util.List-">explain</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../org/apache/calcite/rel/RelWriter.html" title="interface in org.apache.calcite.rel">RelWriter</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>rel</code> - Relational expression</dd>
<dd><code>valueList</code> - List of term-value pairs</dd>
</dl>
</li>
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<a name="getDetailLevel--">
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<h4>getDetailLevel</h4>
<pre>public&nbsp;<a href="../../../../org/apache/calcite/sql/SqlExplainLevel.html" title="enum in org.apache.calcite.sql">SqlExplainLevel</a>&nbsp;getDetailLevel()</pre>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../org/apache/calcite/rel/RelWriter.html#getDetailLevel--">getDetailLevel</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../org/apache/calcite/rel/RelWriter.html" title="interface in org.apache.calcite.rel">RelWriter</a></code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>detail level at which plan should be generated</dd>
</dl>
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<a name="item-java.lang.String-java.lang.Object-">
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<h4>item</h4>
<pre>public&nbsp;<a href="../../../../org/apache/calcite/rel/RelWriter.html" title="interface in org.apache.calcite.rel">RelWriter</a>&nbsp;item(<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>&nbsp;term,
<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>&nbsp;value)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../org/apache/calcite/rel/RelWriter.html#item-java.lang.String-java.lang.Object-">RelWriter</a></code></span></div>
<div class="block">Adds an attribute to the explanation of the current node.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../org/apache/calcite/rel/RelWriter.html#item-java.lang.String-java.lang.Object-">item</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../org/apache/calcite/rel/RelWriter.html" title="interface in org.apache.calcite.rel">RelWriter</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>term</code> - Term for attribute, e.g. "joinType"</dd>
<dd><code>value</code> - Attribute value</dd>
</dl>
</li>
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<a name="done-org.apache.calcite.rel.RelNode-">
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<h4>done</h4>
<pre>public&nbsp;<a href="../../../../org/apache/calcite/rel/RelWriter.html" title="interface in org.apache.calcite.rel">RelWriter</a>&nbsp;done(<a href="../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;node)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../org/apache/calcite/rel/RelWriter.html#done-org.apache.calcite.rel.RelNode-">RelWriter</a></code></span></div>
<div class="block">Writes the completed explanation.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../org/apache/calcite/rel/RelWriter.html#done-org.apache.calcite.rel.RelNode-">done</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../org/apache/calcite/rel/RelWriter.html" title="interface in org.apache.calcite.rel">RelWriter</a></code></dd>
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