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<div class="subTitle">org.apache.calcite.plan</div>
<h2 title="类 RelOptCostImpl" class="title">类 RelOptCostImpl</h2>
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<li>org.apache.calcite.plan.RelOptCostImpl</li>
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<dt>所有已实现的接口:</dt>
<dd><a href="../../../../org/apache/calcite/plan/RelOptCost.html" title="org.apache.calcite.plan中的接口">RelOptCost</a></dd>
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<pre>public class <span class="typeNameLabel">RelOptCostImpl</span>
extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="java.lang中的类或接口">Object</a>
implements <a href="../../../../org/apache/calcite/plan/RelOptCost.html" title="org.apache.calcite.plan中的接口">RelOptCost</a></pre>
<div class="block">RelOptCostImpl provides a default implementation for the <a href="../../../../org/apache/calcite/plan/RelOptCost.html" title="org.apache.calcite.plan中的接口"><code>RelOptCost</code></a>
interface. It it defined in terms of a single scalar quantity; somewhat
arbitrarily, it returns this scalar for rows processed and zero for both CPU
and I/O.</div>
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<h3>字段概要</h3>
<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="字段概要表, 列表字段和解释">
<caption><span>字段</span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">限定符和类型</th>
<th class="colLast" scope="col">字段和说明</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static <a href="../../../../org/apache/calcite/plan/RelOptCostFactory.html" title="org.apache.calcite.plan中的接口">RelOptCostFactory</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptCostImpl.html#FACTORY">FACTORY</a></span></code>&nbsp;</td>
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<h3>构造器概要</h3>
<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="构造器概要表, 列表构造器和解释">
<caption><span>构造器</span><span class="tabEnd">&nbsp;</span></caption>
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<th class="colOne" scope="col">构造器和说明</th>
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<tr class="altColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptCostImpl.html#RelOptCostImpl-double-">RelOptCostImpl</a></span>(double&nbsp;value)</code>&nbsp;</td>
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<h3>方法概要</h3>
<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="方法概要表, 列表方法和解释">
<caption><span id="t0" class="activeTableTab"><span>所有方法</span><span class="tabEnd">&nbsp;</span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">实例方法</a></span><span class="tabEnd">&nbsp;</span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">具体方法</a></span><span class="tabEnd">&nbsp;</span></span></caption>
<tr>
<th class="colFirst" scope="col">限定符和类型</th>
<th class="colLast" scope="col">方法和说明</th>
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<tr id="i0" class="altColor">
<td class="colFirst"><code>double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptCostImpl.html#divideBy-org.apache.calcite.plan.RelOptCost-">divideBy</a></span>(<a href="../../../../org/apache/calcite/plan/RelOptCost.html" title="org.apache.calcite.plan中的接口">RelOptCost</a>&nbsp;cost)</code>
<div class="block">Computes the ratio between this cost and another cost.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptCostImpl.html#equals-java.lang.Object-">equals</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="java.lang中的类或接口">Object</a>&nbsp;obj)</code>&nbsp;</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptCostImpl.html#equals-org.apache.calcite.plan.RelOptCost-">equals</a></span>(<a href="../../../../org/apache/calcite/plan/RelOptCost.html" title="org.apache.calcite.plan中的接口">RelOptCost</a>&nbsp;other)</code>
<div class="block">Compares this to another cost.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptCostImpl.html#getCpu--">getCpu</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptCostImpl.html#getIo--">getIo</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptCostImpl.html#getRows--">getRows</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptCostImpl.html#hashCode--">hashCode</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptCostImpl.html#isEqWithEpsilon-org.apache.calcite.plan.RelOptCost-">isEqWithEpsilon</a></span>(<a href="../../../../org/apache/calcite/plan/RelOptCost.html" title="org.apache.calcite.plan中的接口">RelOptCost</a>&nbsp;other)</code>
<div class="block">Compares this to another cost, allowing for slight roundoff errors.</div>
</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptCostImpl.html#isInfinite--">isInfinite</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptCostImpl.html#isLe-org.apache.calcite.plan.RelOptCost-">isLe</a></span>(<a href="../../../../org/apache/calcite/plan/RelOptCost.html" title="org.apache.calcite.plan中的接口">RelOptCost</a>&nbsp;other)</code>
<div class="block">Compares this to another cost.</div>
</td>
</tr>
<tr id="i10" class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptCostImpl.html#isLt-org.apache.calcite.plan.RelOptCost-">isLt</a></span>(<a href="../../../../org/apache/calcite/plan/RelOptCost.html" title="org.apache.calcite.plan中的接口">RelOptCost</a>&nbsp;other)</code>
<div class="block">Compares this to another cost.</div>
</td>
</tr>
<tr id="i11" class="rowColor">
<td class="colFirst"><code><a href="../../../../org/apache/calcite/plan/RelOptCost.html" title="org.apache.calcite.plan中的接口">RelOptCost</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptCostImpl.html#minus-org.apache.calcite.plan.RelOptCost-">minus</a></span>(<a href="../../../../org/apache/calcite/plan/RelOptCost.html" title="org.apache.calcite.plan中的接口">RelOptCost</a>&nbsp;other)</code>
<div class="block">Subtracts another cost from this.</div>
</td>
</tr>
<tr id="i12" class="altColor">
<td class="colFirst"><code><a href="../../../../org/apache/calcite/plan/RelOptCost.html" title="org.apache.calcite.plan中的接口">RelOptCost</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptCostImpl.html#multiplyBy-double-">multiplyBy</a></span>(double&nbsp;factor)</code>
<div class="block">Multiplies this cost by a scalar factor.</div>
</td>
</tr>
<tr id="i13" class="rowColor">
<td class="colFirst"><code><a href="../../../../org/apache/calcite/plan/RelOptCost.html" title="org.apache.calcite.plan中的接口">RelOptCost</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptCostImpl.html#plus-org.apache.calcite.plan.RelOptCost-">plus</a></span>(<a href="../../../../org/apache/calcite/plan/RelOptCost.html" title="org.apache.calcite.plan中的接口">RelOptCost</a>&nbsp;other)</code>
<div class="block">Adds another cost to this.</div>
</td>
</tr>
<tr id="i14" class="altColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="java.lang中的类或接口">String</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptCostImpl.html#toString--">toString</a></span>()</code>
<div class="block">Forces implementations to override <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="java.lang中的类或接口"><code>Object.toString()</code></a> and provide a
good cost rendering to use during tracing.</div>
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<h3>从类继承的方法&nbsp;java.lang.<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="java.lang中的类或接口">Object</a></h3>
<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="java.lang中的类或接口">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="java.lang中的类或接口">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="java.lang中的类或接口">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="java.lang中的类或接口">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="java.lang中的类或接口">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="java.lang中的类或接口">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="java.lang中的类或接口">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="java.lang中的类或接口">wait</a></code></li>
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<h3>字段详细资料</h3>
<a name="FACTORY">
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<h4>FACTORY</h4>
<pre>public static final&nbsp;<a href="../../../../org/apache/calcite/plan/RelOptCostFactory.html" title="org.apache.calcite.plan中的接口">RelOptCostFactory</a> FACTORY</pre>
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<h3>构造器详细资料</h3>
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<h4>RelOptCostImpl</h4>
<pre>public&nbsp;RelOptCostImpl(double&nbsp;value)</pre>
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<h3>方法详细资料</h3>
<a name="getRows--">
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<h4>getRows</h4>
<pre>public&nbsp;double&nbsp;getRows()</pre>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../org/apache/calcite/plan/RelOptCost.html#getRows--">getRows</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptCost.html" title="org.apache.calcite.plan中的接口">RelOptCost</a></code></dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>number of rows processed; this should not be confused with the
row count produced by a relational expression
(<a href="../../../../org/apache/calcite/rel/RelNode.html#estimateRowCount-org.apache.calcite.rel.metadata.RelMetadataQuery-"><code>RelNode.estimateRowCount(org.apache.calcite.rel.metadata.RelMetadataQuery)</code></a>)</dd>
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<a name="getIo--">
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<h4>getIo</h4>
<pre>public&nbsp;double&nbsp;getIo()</pre>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../org/apache/calcite/plan/RelOptCost.html#getIo--">getIo</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptCost.html" title="org.apache.calcite.plan中的接口">RelOptCost</a></code></dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>usage of I/O resources</dd>
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<h4>getCpu</h4>
<pre>public&nbsp;double&nbsp;getCpu()</pre>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../org/apache/calcite/plan/RelOptCost.html#getCpu--">getCpu</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptCost.html" title="org.apache.calcite.plan中的接口">RelOptCost</a></code></dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>usage of CPU resources</dd>
</dl>
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<h4>isInfinite</h4>
<pre>public&nbsp;boolean&nbsp;isInfinite()</pre>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../org/apache/calcite/plan/RelOptCost.html#isInfinite--">isInfinite</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptCost.html" title="org.apache.calcite.plan中的接口">RelOptCost</a></code></dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>true iff this cost represents an expression that hasn't actually
been implemented (e.g. a pure relational algebra expression) or can't
actually be implemented, e.g. a transfer of data between two disconnected
sites</dd>
</dl>
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</ul>
<a name="isLe-org.apache.calcite.plan.RelOptCost-">
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<h4>isLe</h4>
<pre>public&nbsp;boolean&nbsp;isLe(<a href="../../../../org/apache/calcite/plan/RelOptCost.html" title="org.apache.calcite.plan中的接口">RelOptCost</a>&nbsp;other)</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptCost.html#isLe-org.apache.calcite.plan.RelOptCost-">RelOptCost</a></code></span></div>
<div class="block">Compares this to another cost.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../org/apache/calcite/plan/RelOptCost.html#isLe-org.apache.calcite.plan.RelOptCost-">isLe</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptCost.html" title="org.apache.calcite.plan中的接口">RelOptCost</a></code></dd>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>other</code> - another cost</dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>true iff this is less than or equal to other cost</dd>
</dl>
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</ul>
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<h4>isLt</h4>
<pre>public&nbsp;boolean&nbsp;isLt(<a href="../../../../org/apache/calcite/plan/RelOptCost.html" title="org.apache.calcite.plan中的接口">RelOptCost</a>&nbsp;other)</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptCost.html#isLt-org.apache.calcite.plan.RelOptCost-">RelOptCost</a></code></span></div>
<div class="block">Compares this to another cost.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../org/apache/calcite/plan/RelOptCost.html#isLt-org.apache.calcite.plan.RelOptCost-">isLt</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptCost.html" title="org.apache.calcite.plan中的接口">RelOptCost</a></code></dd>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>other</code> - another cost</dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>true iff this is strictly less than other cost</dd>
</dl>
</li>
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<h4>hashCode</h4>
<pre>public&nbsp;int&nbsp;hashCode()</pre>
<dl>
<dt><span class="overrideSpecifyLabel">覆盖:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="java.lang中的类或接口">hashCode</a></code>&nbsp;在类中&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="java.lang中的类或接口">Object</a></code></dd>
</dl>
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<h4>equals</h4>
<pre>public&nbsp;boolean&nbsp;equals(<a href="../../../../org/apache/calcite/plan/RelOptCost.html" title="org.apache.calcite.plan中的接口">RelOptCost</a>&nbsp;other)</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptCost.html#equals-org.apache.calcite.plan.RelOptCost-">RelOptCost</a></code></span></div>
<div class="block">Compares this to another cost.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../org/apache/calcite/plan/RelOptCost.html#equals-org.apache.calcite.plan.RelOptCost-">equals</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptCost.html" title="org.apache.calcite.plan中的接口">RelOptCost</a></code></dd>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>other</code> - another cost</dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>true iff this is exactly equal to other cost</dd>
</dl>
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<h4>equals</h4>
<pre>public&nbsp;boolean&nbsp;equals(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="java.lang中的类或接口">Object</a>&nbsp;obj)</pre>
<dl>
<dt><span class="overrideSpecifyLabel">覆盖:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="java.lang中的类或接口">equals</a></code>&nbsp;在类中&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="java.lang中的类或接口">Object</a></code></dd>
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<h4>isEqWithEpsilon</h4>
<pre>public&nbsp;boolean&nbsp;isEqWithEpsilon(<a href="../../../../org/apache/calcite/plan/RelOptCost.html" title="org.apache.calcite.plan中的接口">RelOptCost</a>&nbsp;other)</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptCost.html#isEqWithEpsilon-org.apache.calcite.plan.RelOptCost-">RelOptCost</a></code></span></div>
<div class="block">Compares this to another cost, allowing for slight roundoff errors.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../org/apache/calcite/plan/RelOptCost.html#isEqWithEpsilon-org.apache.calcite.plan.RelOptCost-">isEqWithEpsilon</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptCost.html" title="org.apache.calcite.plan中的接口">RelOptCost</a></code></dd>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>other</code> - another cost</dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>true iff this is the same as the other cost within a roundoff
margin of error</dd>
</dl>
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<a name="minus-org.apache.calcite.plan.RelOptCost-">
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<h4>minus</h4>
<pre>public&nbsp;<a href="../../../../org/apache/calcite/plan/RelOptCost.html" title="org.apache.calcite.plan中的接口">RelOptCost</a>&nbsp;minus(<a href="../../../../org/apache/calcite/plan/RelOptCost.html" title="org.apache.calcite.plan中的接口">RelOptCost</a>&nbsp;other)</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptCost.html#minus-org.apache.calcite.plan.RelOptCost-">RelOptCost</a></code></span></div>
<div class="block">Subtracts another cost from this.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../org/apache/calcite/plan/RelOptCost.html#minus-org.apache.calcite.plan.RelOptCost-">minus</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptCost.html" title="org.apache.calcite.plan中的接口">RelOptCost</a></code></dd>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>other</code> - another cost</dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>difference between this and other cost</dd>
</dl>
</li>
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<a name="plus-org.apache.calcite.plan.RelOptCost-">
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<h4>plus</h4>
<pre>public&nbsp;<a href="../../../../org/apache/calcite/plan/RelOptCost.html" title="org.apache.calcite.plan中的接口">RelOptCost</a>&nbsp;plus(<a href="../../../../org/apache/calcite/plan/RelOptCost.html" title="org.apache.calcite.plan中的接口">RelOptCost</a>&nbsp;other)</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptCost.html#plus-org.apache.calcite.plan.RelOptCost-">RelOptCost</a></code></span></div>
<div class="block">Adds another cost to this.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../org/apache/calcite/plan/RelOptCost.html#plus-org.apache.calcite.plan.RelOptCost-">plus</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptCost.html" title="org.apache.calcite.plan中的接口">RelOptCost</a></code></dd>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>other</code> - another cost</dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>sum of this and other cost</dd>
</dl>
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<h4>multiplyBy</h4>
<pre>public&nbsp;<a href="../../../../org/apache/calcite/plan/RelOptCost.html" title="org.apache.calcite.plan中的接口">RelOptCost</a>&nbsp;multiplyBy(double&nbsp;factor)</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptCost.html#multiplyBy-double-">RelOptCost</a></code></span></div>
<div class="block">Multiplies this cost by a scalar factor.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../org/apache/calcite/plan/RelOptCost.html#multiplyBy-double-">multiplyBy</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptCost.html" title="org.apache.calcite.plan中的接口">RelOptCost</a></code></dd>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>factor</code> - scalar factor</dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>scalar product of this and factor</dd>
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<h4>divideBy</h4>
<pre>public&nbsp;double&nbsp;divideBy(<a href="../../../../org/apache/calcite/plan/RelOptCost.html" title="org.apache.calcite.plan中的接口">RelOptCost</a>&nbsp;cost)</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptCost.html#divideBy-org.apache.calcite.plan.RelOptCost-">RelOptCost</a></code></span></div>
<div class="block">Computes the ratio between this cost and another cost.
<p>divideBy is the inverse of <a href="../../../../org/apache/calcite/plan/RelOptCost.html#multiplyBy-double-"><code>RelOptCost.multiplyBy(double)</code></a>. For any
finite, non-zero cost and factor f, <code>
cost.divideBy(cost.multiplyBy(f))</code> yields <code>1 / f</code>.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../org/apache/calcite/plan/RelOptCost.html#divideBy-org.apache.calcite.plan.RelOptCost-">divideBy</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptCost.html" title="org.apache.calcite.plan中的接口">RelOptCost</a></code></dd>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>cost</code> - Other cost</dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>Ratio between costs</dd>
</dl>
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<h4>toString</h4>
<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="java.lang中的类或接口">String</a>&nbsp;toString()</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptCost.html#toString--">RelOptCost</a></code></span></div>
<div class="block">Forces implementations to override <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="java.lang中的类或接口"><code>Object.toString()</code></a> and provide a
good cost rendering to use during tracing.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../org/apache/calcite/plan/RelOptCost.html#toString--">toString</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptCost.html" title="org.apache.calcite.plan中的接口">RelOptCost</a></code></dd>
<dt><span class="overrideSpecifyLabel">覆盖:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="java.lang中的类或接口">toString</a></code>&nbsp;在类中&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="java.lang中的类或接口">Object</a></code></dd>
</dl>
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