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| <li>概要: </li> |
| <li>嵌套 | </li> |
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| <div class="subTitle">org.apache.calcite.adapter.enumerable</div> |
| <h2 title="枚举 EnumerableConvention" class="title">枚举 EnumerableConvention</h2> |
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| <li>org.apache.calcite.adapter.enumerable.EnumerableConvention</li> |
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| <pre>public enum <span class="typeNameLabel">EnumerableConvention</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><<a href="../../../../../org/apache/calcite/adapter/enumerable/EnumerableConvention.html" title="org.apache.calcite.adapter.enumerable中的枚举">EnumerableConvention</a>> |
| implements <a href="../../../../../org/apache/calcite/plan/Convention.html" title="org.apache.calcite.plan中的接口">Convention</a></pre> |
| <div class="block">Family of calling conventions that return results as an |
| <a href="../../../../../org/apache/calcite/linq4j/Enumerable.html" title="org.apache.calcite.linq4j中的接口"><code>Enumerable</code></a>.</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 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"> </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/adapter/enumerable/EnumerableConvention.html#INSTANCE">INSTANCE</a></span></code> </td> |
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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"> </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> |
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| <td class="colFirst"><code>static double</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/adapter/enumerable/EnumerableConvention.html#COST_MULTIPLIER">COST_MULTIPLIER</a></span></code> |
| <div class="block">Cost of an enumerable node versus implementing an equivalent node in a |
| "typical" calling convention.</div> |
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| <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"> </span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">静态方法</a></span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">实例方法</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">具体方法</a></span><span class="tabEnd"> </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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| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/adapter/enumerable/EnumerableConvention.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> 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/adapter/enumerable/EnumerableConvention.html#getInterface--">getInterface</a></span>()</code> </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/adapter/enumerable/EnumerableConvention.html#getName--">getName</a></span>()</code> </td> |
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| <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/adapter/enumerable/EnumerableConvention.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/adapter/enumerable/EnumerableConvention.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> 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/adapter/enumerable/EnumerableConvention.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> trait)</code> |
| <div class="block">Returns whether this trait satisfies a given trait.</div> |
| </td> |
| </tr> |
| <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/adapter/enumerable/EnumerableConvention.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/adapter/enumerable/EnumerableConvention.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> fromTraits, |
| <a href="../../../../../org/apache/calcite/plan/RelTraitSet.html" title="org.apache.calcite.plan中的类">RelTraitSet</a> 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/adapter/enumerable/EnumerableConvention.html" title="org.apache.calcite.adapter.enumerable中的枚举">EnumerableConvention</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/adapter/enumerable/EnumerableConvention.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> 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/adapter/enumerable/EnumerableConvention.html" title="org.apache.calcite.adapter.enumerable中的枚举">EnumerableConvention</a>[]</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/adapter/enumerable/EnumerableConvention.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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| <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 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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| <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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| <pre>public static final <a href="../../../../../org/apache/calcite/adapter/enumerable/EnumerableConvention.html" title="org.apache.calcite.adapter.enumerable中的枚举">EnumerableConvention</a> INSTANCE</pre> |
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| <h4>COST_MULTIPLIER</h4> |
| <pre>public static final double COST_MULTIPLIER</pre> |
| <div class="block">Cost of an enumerable node versus implementing an equivalent node in a |
| "typical" calling convention.</div> |
| <dl> |
| <dt><span class="seeLabel">另请参阅:</span></dt> |
| <dd><a href="../../../../../constant-values.html#org.apache.calcite.adapter.enumerable.EnumerableConvention.COST_MULTIPLIER">常量字段值</a></dd> |
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| <h4>values</h4> |
| <pre>public static <a href="../../../../../org/apache/calcite/adapter/enumerable/EnumerableConvention.html" title="org.apache.calcite.adapter.enumerable中的枚举">EnumerableConvention</a>[] 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 (EnumerableConvention c : EnumerableConvention.values()) |
| 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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| <pre>public static <a href="../../../../../org/apache/calcite/adapter/enumerable/EnumerableConvention.html" title="org.apache.calcite.adapter.enumerable中的枚举">EnumerableConvention</a> 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> 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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| <pre>public <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> toString()</pre> |
| <div class="block"><span class="descfrmTypeLabel">从接口复制的说明: <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> 在接口中 <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> 在类中 <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><<a href="../../../../../org/apache/calcite/adapter/enumerable/EnumerableConvention.html" title="org.apache.calcite.adapter.enumerable中的枚举">EnumerableConvention</a>></code></dd> |
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| <pre>public <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> 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> 在接口中 <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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| <pre>public <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> 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> 在接口中 <code><a href="../../../../../org/apache/calcite/plan/Convention.html" title="org.apache.calcite.plan中的接口">Convention</a></code></dd> |
| </dl> |
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| <pre>public <a href="../../../../../org/apache/calcite/plan/RelTraitDef.html" title="org.apache.calcite.plan中的类">RelTraitDef</a> getTraitDef()</pre> |
| <div class="block"><span class="descfrmTypeLabel">从接口复制的说明: <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> 在接口中 <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> |
| </dl> |
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| <h4>satisfies</h4> |
| <pre>public boolean satisfies(<a href="../../../../../org/apache/calcite/plan/RelTrait.html" title="org.apache.calcite.plan中的接口">RelTrait</a> trait)</pre> |
| <div class="block"><span class="descfrmTypeLabel">从接口复制的说明: <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> 在接口中 <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> |
| </dl> |
| </li> |
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| <a name="register-org.apache.calcite.plan.RelOptPlanner-"> |
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| <h4>register</h4> |
| <pre>public void register(<a href="../../../../../org/apache/calcite/plan/RelOptPlanner.html" title="org.apache.calcite.plan中的接口">RelOptPlanner</a> planner)</pre> |
| <div class="block"><span class="descfrmTypeLabel">从接口复制的说明: <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> 在接口中 <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> |
| </dl> |
| </li> |
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| <a name="canConvertConvention-org.apache.calcite.plan.Convention-"> |
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| <pre>public boolean canConvertConvention(<a href="../../../../../org/apache/calcite/plan/Convention.html" title="org.apache.calcite.plan中的接口">Convention</a> toConvention)</pre> |
| <div class="block"><span class="descfrmTypeLabel">从接口复制的说明: <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> 在接口中 <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> |
| </ul> |
| <a name="useAbstractConvertersForConversion-org.apache.calcite.plan.RelTraitSet-org.apache.calcite.plan.RelTraitSet-"> |
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| <pre>public boolean useAbstractConvertersForConversion(<a href="../../../../../org/apache/calcite/plan/RelTraitSet.html" title="org.apache.calcite.plan中的类">RelTraitSet</a> fromTraits, |
| <a href="../../../../../org/apache/calcite/plan/RelTraitSet.html" title="org.apache.calcite.plan中的类">RelTraitSet</a> toTraits)</pre> |
| <div class="block"><span class="descfrmTypeLabel">从接口复制的说明: <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> 在接口中 <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> |
| </li> |
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