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| <div class="subTitle">org.apache.calcite.plan.volcano</div> |
| <h2 title="类 VolcanoRelMetadataProvider" class="title">类 VolcanoRelMetadataProvider</h2> |
| </div> |
| <div class="contentContainer"> |
| <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>org.apache.calcite.plan.volcano.VolcanoRelMetadataProvider</li> |
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| </li> |
| </ul> |
| <div class="description"> |
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| <dl> |
| <dt>所有已实现的接口:</dt> |
| <dd><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataProvider.html" title="org.apache.calcite.rel.metadata中的接口">RelMetadataProvider</a></dd> |
| </dl> |
| <hr> |
| <br> |
| <pre>public class <span class="typeNameLabel">VolcanoRelMetadataProvider</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/rel/metadata/RelMetadataProvider.html" title="org.apache.calcite.rel.metadata中的接口">RelMetadataProvider</a></pre> |
| <div class="block">VolcanoRelMetadataProvider implements the <a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataProvider.html" title="org.apache.calcite.rel.metadata中的接口"><code>RelMetadataProvider</code></a> |
| interface by combining metadata from the rels making up an equivalence class.</div> |
| </li> |
| </ul> |
| </div> |
| <div class="summary"> |
| <ul class="blockList"> |
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| <!-- ======== CONSTRUCTOR SUMMARY ======== --> |
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| </a> |
| <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"> </span></caption> |
| <tr> |
| <th class="colOne" scope="col">构造器和说明</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/plan/volcano/VolcanoRelMetadataProvider.html#VolcanoRelMetadataProvider--">VolcanoRelMetadataProvider</a></span>()</code> </td> |
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| </ul> |
| <!-- ========== METHOD SUMMARY =========== --> |
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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="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> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code><M extends <a href="../../../../../org/apache/calcite/rel/metadata/Metadata.html" title="org.apache.calcite.rel.metadata中的接口">Metadata</a>><br><a href="../../../../../org/apache/calcite/rel/metadata/UnboundMetadata.html" title="org.apache.calcite.rel.metadata中的接口">UnboundMetadata</a><M></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/plan/volcano/VolcanoRelMetadataProvider.html#apply-java.lang.Class-java.lang.Class-">apply</a></span>(<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><? extends <a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a>> relClass, |
| <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><? extends M> metadataClass)</code> |
| <div class="block">Retrieves metadata of a particular type and for a particular sub-class |
| of relational expression.</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/volcano/VolcanoRelMetadataProvider.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> obj)</code> </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code><M extends <a href="../../../../../org/apache/calcite/rel/metadata/Metadata.html" title="org.apache.calcite.rel.metadata中的接口">Metadata</a>><br>com.google.common.collect.Multimap<<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Method.html?is-external=true" title="java.lang.reflect中的类或接口">Method</a>,<a href="../../../../../org/apache/calcite/rel/metadata/MetadataHandler.html" title="org.apache.calcite.rel.metadata中的接口">MetadataHandler</a><M>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/plan/volcano/VolcanoRelMetadataProvider.html#handlers-org.apache.calcite.rel.metadata.MetadataDef-">handlers</a></span>(<a href="../../../../../org/apache/calcite/rel/metadata/MetadataDef.html" title="org.apache.calcite.rel.metadata中的类">MetadataDef</a><M> def)</code> </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/plan/volcano/VolcanoRelMetadataProvider.html#hashCode--">hashCode</a></span>()</code> </td> |
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| </table> |
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| </a> |
| <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#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#toString--" title="java.lang中的类或接口">toString</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> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
| <div class="details"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="constructor.detail"> |
| <!-- --> |
| </a> |
| <h3>构造器详细资料</h3> |
| <a name="VolcanoRelMetadataProvider--"> |
| <!-- --> |
| </a> |
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| <h4>VolcanoRelMetadataProvider</h4> |
| <pre>public VolcanoRelMetadataProvider()</pre> |
| </li> |
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| <h3>方法详细资料</h3> |
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| <h4>equals</h4> |
| <pre>public boolean 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> 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> 在类中 <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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| <li class="blockList"> |
| <h4>hashCode</h4> |
| <pre>public int 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> 在类中 <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> |
| </li> |
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| <a name="apply-java.lang.Class-java.lang.Class-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>apply</h4> |
| <pre>public <M extends <a href="../../../../../org/apache/calcite/rel/metadata/Metadata.html" title="org.apache.calcite.rel.metadata中的接口">Metadata</a>> <a href="../../../../../org/apache/calcite/rel/metadata/UnboundMetadata.html" title="org.apache.calcite.rel.metadata中的接口">UnboundMetadata</a><M> apply(<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><? extends <a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a>> relClass, |
| <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><? extends M> metadataClass)</pre> |
| <div class="block"><span class="descfrmTypeLabel">从接口复制的说明: <code><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataProvider.html#apply-java.lang.Class-java.lang.Class-">RelMetadataProvider</a></code></span></div> |
| <div class="block">Retrieves metadata of a particular type and for a particular sub-class |
| of relational expression. |
| |
| <p>The object returned is a function. It can be applied to a relational |
| expression of the given type to create a metadata object.</p> |
| |
| <p>For example, you might call</p> |
| |
| <blockquote><pre> |
| RelMetadataProvider provider; |
| LogicalFilter filter; |
| RexNode predicate; |
| Function<RelNode, Metadata> function = |
| provider.apply(LogicalFilter.class, Selectivity.class}; |
| Selectivity selectivity = function.apply(filter); |
| Double d = selectivity.selectivity(predicate); |
| </pre></blockquote></div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">指定者:</span></dt> |
| <dd><code><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataProvider.html#apply-java.lang.Class-java.lang.Class-">apply</a></code> 在接口中 <code><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataProvider.html" title="org.apache.calcite.rel.metadata中的接口">RelMetadataProvider</a></code></dd> |
| <dt><span class="paramLabel">参数:</span></dt> |
| <dd><code>relClass</code> - Type of relational expression</dd> |
| <dd><code>metadataClass</code> - Type of metadata</dd> |
| <dt><span class="returnLabel">返回:</span></dt> |
| <dd>Function that will field a metadata instance; or null if this |
| provider cannot supply metadata of this type</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="handlers-org.apache.calcite.rel.metadata.MetadataDef-"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>handlers</h4> |
| <pre>public <M extends <a href="../../../../../org/apache/calcite/rel/metadata/Metadata.html" title="org.apache.calcite.rel.metadata中的接口">Metadata</a>> com.google.common.collect.Multimap<<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Method.html?is-external=true" title="java.lang.reflect中的类或接口">Method</a>,<a href="../../../../../org/apache/calcite/rel/metadata/MetadataHandler.html" title="org.apache.calcite.rel.metadata中的接口">MetadataHandler</a><M>> handlers(<a href="../../../../../org/apache/calcite/rel/metadata/MetadataDef.html" title="org.apache.calcite.rel.metadata中的类">MetadataDef</a><M> def)</pre> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">指定者:</span></dt> |
| <dd><code><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataProvider.html#handlers-org.apache.calcite.rel.metadata.MetadataDef-">handlers</a></code> 在接口中 <code><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataProvider.html" title="org.apache.calcite.rel.metadata中的接口">RelMetadataProvider</a></code></dd> |
| </dl> |
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