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<div class="subTitle">org.apache.calcite.interpreter</div>
<h2 title="枚举 InterpretableConvention" class="title">枚举 InterpretableConvention</h2>
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<ul class="inheritance">
<li><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">java.lang.Object</a></li>
<li>
<ul class="inheritance">
<li><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Enum.html?is-external=true" title="java.lang中的类或接口">java.lang.Enum</a>&lt;<a href="../../../../org/apache/calcite/interpreter/InterpretableConvention.html" title="org.apache.calcite.interpreter中的枚举">InterpretableConvention</a>&gt;</li>
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<ul class="inheritance">
<li>org.apache.calcite.interpreter.InterpretableConvention</li>
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<div class="description">
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<dl>
<dt>所有已实现的接口:</dt>
<dd><a href="https://docs.oracle.com/javase/8/docs/api/java/io/Serializable.html?is-external=true" title="java.io中的类或接口">Serializable</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Comparable.html?is-external=true" title="java.lang中的类或接口">Comparable</a>&lt;<a href="../../../../org/apache/calcite/interpreter/InterpretableConvention.html" title="org.apache.calcite.interpreter中的枚举">InterpretableConvention</a>&gt;, <a href="../../../../org/apache/calcite/plan/Convention.html" title="org.apache.calcite.plan中的接口">Convention</a>, <a href="../../../../org/apache/calcite/plan/RelTrait.html" title="org.apache.calcite.plan中的接口">RelTrait</a></dd>
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<hr>
<br>
<pre>public enum <span class="typeNameLabel">InterpretableConvention</span>
extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Enum.html?is-external=true" title="java.lang中的类或接口">Enum</a>&lt;<a href="../../../../org/apache/calcite/interpreter/InterpretableConvention.html" title="org.apache.calcite.interpreter中的枚举">InterpretableConvention</a>&gt;
implements <a href="../../../../org/apache/calcite/plan/Convention.html" title="org.apache.calcite.plan中的接口">Convention</a></pre>
<div class="block">Calling convention that returns results as an
<a href="../../../../org/apache/calcite/linq4j/Enumerable.html" title="org.apache.calcite.linq4j中的接口"><code>Enumerable</code></a> of object arrays.
<p>Unlike enumerable convention, no code generation is required.</div>
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<h3>嵌套类概要</h3>
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<h3>从接口继承的嵌套类/接口&nbsp;org.apache.calcite.plan.<a href="../../../../org/apache/calcite/plan/Convention.html" title="org.apache.calcite.plan中的接口">Convention</a></h3>
<code><a href="../../../../org/apache/calcite/plan/Convention.Impl.html" title="org.apache.calcite.plan中的类">Convention.Impl</a></code></li>
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<h3>枚举常量概要</h3>
<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="枚举常量概要表, 列表枚举常量和解释">
<caption><span>枚举常量</span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colOne" scope="col">枚举常量和说明</th>
</tr>
<tr class="altColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/interpreter/InterpretableConvention.html#INSTANCE">INSTANCE</a></span></code>&nbsp;</td>
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<h3>字段概要</h3>
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<h3>从接口继承的字段&nbsp;org.apache.calcite.plan.<a href="../../../../org/apache/calcite/plan/Convention.html" title="org.apache.calcite.plan中的接口">Convention</a></h3>
<code><a href="../../../../org/apache/calcite/plan/Convention.html#NONE">NONE</a></code></li>
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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="t1" class="tableTab"><span><a href="javascript:show(1);">静态方法</a></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>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/interpreter/InterpretableConvention.html#canConvertConvention-org.apache.calcite.plan.Convention-">canConvertConvention</a></span>(<a href="../../../../org/apache/calcite/plan/Convention.html" title="org.apache.calcite.plan中的接口">Convention</a>&nbsp;toConvention)</code>
<div class="block">Returns whether we should convert from this convention to
<code>toConvention</code>.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="java.lang中的类或接口">Class</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/interpreter/InterpretableConvention.html#getInterface--">getInterface</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i2" 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/interpreter/InterpretableConvention.html#getName--">getName</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code><a href="../../../../org/apache/calcite/plan/RelTraitDef.html" title="org.apache.calcite.plan中的类">RelTraitDef</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/interpreter/InterpretableConvention.html#getTraitDef--">getTraitDef</a></span>()</code>
<div class="block">Returns the RelTraitDef that defines this RelTrait.</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/interpreter/InterpretableConvention.html#register-org.apache.calcite.plan.RelOptPlanner-">register</a></span>(<a href="../../../../org/apache/calcite/plan/RelOptPlanner.html" title="org.apache.calcite.plan中的接口">RelOptPlanner</a>&nbsp;planner)</code>
<div class="block">Registers a trait instance with the planner.</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/interpreter/InterpretableConvention.html#satisfies-org.apache.calcite.plan.RelTrait-">satisfies</a></span>(<a href="../../../../org/apache/calcite/plan/RelTrait.html" title="org.apache.calcite.plan中的接口">RelTrait</a>&nbsp;trait)</code>
<div class="block">Returns whether this trait satisfies a given trait.</div>
</td>
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<tr id="i6" 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/interpreter/InterpretableConvention.html#toString--">toString</a></span>()</code>
<div class="block">Returns a succinct name for this trait.</div>
</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/interpreter/InterpretableConvention.html#useAbstractConvertersForConversion-org.apache.calcite.plan.RelTraitSet-org.apache.calcite.plan.RelTraitSet-">useAbstractConvertersForConversion</a></span>(<a href="../../../../org/apache/calcite/plan/RelTraitSet.html" title="org.apache.calcite.plan中的类">RelTraitSet</a>&nbsp;fromTraits,
<a href="../../../../org/apache/calcite/plan/RelTraitSet.html" title="org.apache.calcite.plan中的类">RelTraitSet</a>&nbsp;toTraits)</code>
<div class="block">Returns whether we should convert from this trait set to the other trait
set.</div>
</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code>static <a href="../../../../org/apache/calcite/interpreter/InterpretableConvention.html" title="org.apache.calcite.interpreter中的枚举">InterpretableConvention</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/interpreter/InterpretableConvention.html#valueOf-java.lang.String-">valueOf</a></span>(<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;name)</code>
<div class="block">返回带有指定名称的该类型的枚举常量。</div>
</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code>static <a href="../../../../org/apache/calcite/interpreter/InterpretableConvention.html" title="org.apache.calcite.interpreter中的枚举">InterpretableConvention</a>[]</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/interpreter/InterpretableConvention.html#values--">values</a></span>()</code>
<div class="block">按照声明该枚举类型的常量的顺序, 返回
包含这些常量的数组。</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/Enum.html?is-external=true" title="java.lang中的类或接口">Enum</a></h3>
<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Enum.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/Enum.html?is-external=true#compareTo-E-" title="java.lang中的类或接口">compareTo</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Enum.html?is-external=true#equals-java.lang.Object-" title="java.lang中的类或接口">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Enum.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/Enum.html?is-external=true#getDeclaringClass--" title="java.lang中的类或接口">getDeclaringClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Enum.html?is-external=true#hashCode--" title="java.lang中的类或接口">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Enum.html?is-external=true#name--" title="java.lang中的类或接口">name</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Enum.html?is-external=true#ordinal--" title="java.lang中的类或接口">ordinal</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Enum.html?is-external=true#valueOf-java.lang.Class-java.lang.String-" title="java.lang中的类或接口">valueOf</a></code></li>
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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#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>从接口继承的方法&nbsp;org.apache.calcite.plan.<a href="../../../../org/apache/calcite/plan/RelTrait.html" title="org.apache.calcite.plan中的接口">RelTrait</a></h3>
<code><a href="../../../../org/apache/calcite/plan/RelTrait.html#equals-java.lang.Object-">equals</a>, <a href="../../../../org/apache/calcite/plan/RelTrait.html#hashCode--">hashCode</a></code></li>
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<div class="details">
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<h3>枚举常量详细资料</h3>
<a name="INSTANCE">
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<h4>INSTANCE</h4>
<pre>public static final&nbsp;<a href="../../../../org/apache/calcite/interpreter/InterpretableConvention.html" title="org.apache.calcite.interpreter中的枚举">InterpretableConvention</a> INSTANCE</pre>
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<h4>values</h4>
<pre>public static&nbsp;<a href="../../../../org/apache/calcite/interpreter/InterpretableConvention.html" title="org.apache.calcite.interpreter中的枚举">InterpretableConvention</a>[]&nbsp;values()</pre>
<div class="block">按照声明该枚举类型的常量的顺序, 返回
包含这些常量的数组。该方法可用于迭代
常量, 如下所示:
<pre>
for (InterpretableConvention c : InterpretableConvention.values())
&nbsp; System.out.println(c);
</pre></div>
<dl>
<dt><span class="returnLabel">返回:</span></dt>
<dd>按照声明该枚举类型的常量的顺序返回的包含这些常量的数组</dd>
</dl>
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<a name="valueOf-java.lang.String-">
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<h4>valueOf</h4>
<pre>public static&nbsp;<a href="../../../../org/apache/calcite/interpreter/InterpretableConvention.html" title="org.apache.calcite.interpreter中的枚举">InterpretableConvention</a>&nbsp;valueOf(<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;name)</pre>
<div class="block">返回带有指定名称的该类型的枚举常量。
字符串必须与用于声明该类型的枚举常量的
标识符<i>完全</i>匹配。(不允许有多余
的空格字符。)</div>
<dl>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>name</code> - 要返回的枚举常量的名称。</dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>返回带有指定名称的枚举常量</dd>
<dt><span class="throwsLabel">抛出:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="java.lang中的类或接口">IllegalArgumentException</a></code> - 如果该枚举类型没有带有指定名称的常量</dd>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/NullPointerException.html?is-external=true" title="java.lang中的类或接口">NullPointerException</a></code> - 如果参数为空值</dd>
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<a name="toString--">
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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/RelTrait.html#toString--">RelTrait</a></code></span></div>
<div class="block">Returns a succinct name for this trait. The planner may use this String
to describe the trait.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../org/apache/calcite/plan/RelTrait.html#toString--">toString</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelTrait.html" title="org.apache.calcite.plan中的接口">RelTrait</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/Enum.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/Enum.html?is-external=true" title="java.lang中的类或接口">Enum</a>&lt;<a href="../../../../org/apache/calcite/interpreter/InterpretableConvention.html" title="org.apache.calcite.interpreter中的枚举">InterpretableConvention</a>&gt;</code></dd>
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<h4>getInterface</h4>
<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="java.lang中的类或接口">Class</a>&nbsp;getInterface()</pre>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../org/apache/calcite/plan/Convention.html#getInterface--">getInterface</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../org/apache/calcite/plan/Convention.html" title="org.apache.calcite.plan中的接口">Convention</a></code></dd>
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<h4>getName</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;getName()</pre>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../org/apache/calcite/plan/Convention.html#getName--">getName</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../org/apache/calcite/plan/Convention.html" title="org.apache.calcite.plan中的接口">Convention</a></code></dd>
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<h4>getTraitDef</h4>
<pre>public&nbsp;<a href="../../../../org/apache/calcite/plan/RelTraitDef.html" title="org.apache.calcite.plan中的类">RelTraitDef</a>&nbsp;getTraitDef()</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelTrait.html#getTraitDef--">RelTrait</a></code></span></div>
<div class="block">Returns the RelTraitDef that defines this RelTrait.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../org/apache/calcite/plan/RelTrait.html#getTraitDef--">getTraitDef</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelTrait.html" title="org.apache.calcite.plan中的接口">RelTrait</a></code></dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>the RelTraitDef that defines this RelTrait</dd>
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<h4>satisfies</h4>
<pre>public&nbsp;boolean&nbsp;satisfies(<a href="../../../../org/apache/calcite/plan/RelTrait.html" title="org.apache.calcite.plan中的接口">RelTrait</a>&nbsp;trait)</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelTrait.html#satisfies-org.apache.calcite.plan.RelTrait-">RelTrait</a></code></span></div>
<div class="block">Returns whether this trait satisfies a given trait.
<p>A trait satisfies another if it is the same or stricter. For example,
<code>ORDER BY x, y</code> satisfies <code>ORDER BY x</code>.
<p>A trait's <code>satisfies</code> relation must be a partial order (reflexive,
anti-symmetric, transitive). Many traits cannot be "loosened"; their
<code>satisfies</code> is an equivalence relation, where only X satisfies X.
<p>If a trait has multiple values
(see <code>RelCompositeTrait</code>)
a collection (T0, T1, ...) satisfies T if any Ti satisfies T.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../org/apache/calcite/plan/RelTrait.html#satisfies-org.apache.calcite.plan.RelTrait-">satisfies</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelTrait.html" title="org.apache.calcite.plan中的接口">RelTrait</a></code></dd>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>trait</code> - Given trait</dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>Whether this trait subsumes a given trait</dd>
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<h4>register</h4>
<pre>public&nbsp;void&nbsp;register(<a href="../../../../org/apache/calcite/plan/RelOptPlanner.html" title="org.apache.calcite.plan中的接口">RelOptPlanner</a>&nbsp;planner)</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelTrait.html#register-org.apache.calcite.plan.RelOptPlanner-">RelTrait</a></code></span></div>
<div class="block">Registers a trait instance with the planner.
<p>This is an opportunity to add rules that relate to that trait. However,
typical implementations will do nothing.</p></div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../org/apache/calcite/plan/RelTrait.html#register-org.apache.calcite.plan.RelOptPlanner-">register</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelTrait.html" title="org.apache.calcite.plan中的接口">RelTrait</a></code></dd>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>planner</code> - Planner</dd>
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<h4>canConvertConvention</h4>
<pre>public&nbsp;boolean&nbsp;canConvertConvention(<a href="../../../../org/apache/calcite/plan/Convention.html" title="org.apache.calcite.plan中的接口">Convention</a>&nbsp;toConvention)</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../org/apache/calcite/plan/Convention.html#canConvertConvention-org.apache.calcite.plan.Convention-">Convention</a></code></span></div>
<div class="block">Returns whether we should convert from this convention to
<code>toConvention</code>. Used by <a href="../../../../org/apache/calcite/plan/ConventionTraitDef.html" title="org.apache.calcite.plan中的类"><code>ConventionTraitDef</code></a>.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../org/apache/calcite/plan/Convention.html#canConvertConvention-org.apache.calcite.plan.Convention-">canConvertConvention</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../org/apache/calcite/plan/Convention.html" title="org.apache.calcite.plan中的接口">Convention</a></code></dd>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>toConvention</code> - Desired convention to convert to</dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>Whether we should convert from this convention to toConvention</dd>
</dl>
</li>
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<h4>useAbstractConvertersForConversion</h4>
<pre>public&nbsp;boolean&nbsp;useAbstractConvertersForConversion(<a href="../../../../org/apache/calcite/plan/RelTraitSet.html" title="org.apache.calcite.plan中的类">RelTraitSet</a>&nbsp;fromTraits,
<a href="../../../../org/apache/calcite/plan/RelTraitSet.html" title="org.apache.calcite.plan中的类">RelTraitSet</a>&nbsp;toTraits)</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../org/apache/calcite/plan/Convention.html#useAbstractConvertersForConversion-org.apache.calcite.plan.RelTraitSet-org.apache.calcite.plan.RelTraitSet-">Convention</a></code></span></div>
<div class="block">Returns whether we should convert from this trait set to the other trait
set.
<p>The convention decides whether it wants to handle other trait
conversions, e.g. collation, distribution, etc. For a given convention, we
will only add abstract converters to handle the trait (convention,
collation, distribution, etc.) conversions if this function returns true.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../org/apache/calcite/plan/Convention.html#useAbstractConvertersForConversion-org.apache.calcite.plan.RelTraitSet-org.apache.calcite.plan.RelTraitSet-">useAbstractConvertersForConversion</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../org/apache/calcite/plan/Convention.html" title="org.apache.calcite.plan中的接口">Convention</a></code></dd>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>fromTraits</code> - Traits of the RelNode that we are converting from</dd>
<dd><code>toTraits</code> - Target traits</dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>Whether we should add converters</dd>
</dl>
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