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<div class="sub-title"><span class="package-label-in-type">Package</span>&nbsp;<a href="package-summary.html">org.apache.calcite.plan.volcano</a></div>
<h1 title="Class VolcanoRelMetadataProvider" class="title">Class VolcanoRelMetadataProvider</h1>
</div>
<div class="inheritance" title="Inheritance Tree"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">java.lang.Object</a>
<div class="inheritance">org.apache.calcite.plan.volcano.VolcanoRelMetadataProvider</div>
</div>
<section class="class-description" id="class-description">
<dl class="notes">
<dt>All Implemented Interfaces:</dt>
<dd><code><a href="../../rel/metadata/RelMetadataProvider.html" title="interface in org.apache.calcite.rel.metadata">RelMetadataProvider</a></code></dd>
</dl>
<hr>
<div class="type-signature"><span class="annotations"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Deprecated.html" title="class or interface in java.lang" class="external-link">@Deprecated</a>
</span><span class="modifiers">public class </span><span class="element-name type-name-label">VolcanoRelMetadataProvider</span>
<span class="extends-implements">extends <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a>
implements <a href="../../rel/metadata/RelMetadataProvider.html" title="interface in org.apache.calcite.rel.metadata">RelMetadataProvider</a></span></div>
<div class="deprecation-block"><span class="deprecated-label">Deprecated.</span></div>
<div class="block">VolcanoRelMetadataProvider implements the <a href="../../rel/metadata/RelMetadataProvider.html" title="interface in org.apache.calcite.rel.metadata"><code>RelMetadataProvider</code></a>
interface by combining metadata from the rels making up an equivalence class.</div>
</section>
<section class="summary">
<ul class="summary-list">
<!-- ======== CONSTRUCTOR SUMMARY ======== -->
<li>
<section class="constructor-summary" id="constructor-summary">
<h2>Constructor Summary</h2>
<div class="caption"><span>Constructors</span></div>
<div class="summary-table two-column-summary">
<div class="table-header col-first">Constructor</div>
<div class="table-header col-last">Description</div>
<div class="col-constructor-name even-row-color"><code><a href="#%3Cinit%3E()" class="member-name-link">VolcanoRelMetadataProvider</a>()</code></div>
<div class="col-last even-row-color">
<div class="block"><span class="deprecated-label">Deprecated.</span></div>
&nbsp;</div>
</div>
</section>
</li>
<!-- ========== METHOD SUMMARY =========== -->
<li>
<section class="method-summary" id="method-summary">
<h2>Method Summary</h2>
<div id="method-summary-table">
<div class="table-tabs" role="tablist" aria-orientation="horizontal"><button id="method-summary-table-tab0" role="tab" aria-selected="true" aria-controls="method-summary-table.tabpanel" tabindex="0" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table', 3)" class="active-table-tab">All Methods</button><button id="method-summary-table-tab2" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab2', 3)" class="table-tab">Instance Methods</button><button id="method-summary-table-tab4" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab4', 3)" class="table-tab">Concrete Methods</button><button id="method-summary-table-tab6" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab6', 3)" class="table-tab">Deprecated Methods</button></div>
<div id="method-summary-table.tabpanel" role="tabpanel">
<div class="summary-table three-column-summary" aria-labelledby="method-summary-table-tab0">
<div class="table-header col-first">Modifier and Type</div>
<div class="table-header col-second">Method</div>
<div class="table-header col-last">Description</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4 method-summary-table-tab6"><code>&lt;@Nullable M extends @Nullable <a href="../../rel/metadata/Metadata.html" title="interface in org.apache.calcite.rel.metadata">Metadata</a>&gt;<br>@Nullable <a href="../../rel/metadata/UnboundMetadata.html" title="interface in org.apache.calcite.rel.metadata">UnboundMetadata</a>&lt;M&gt;</code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4 method-summary-table-tab6"><code><a href="#apply(java.lang.Class,java.lang.Class)" class="member-name-link">apply</a><wbr>(<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Class.html" title="class or interface in java.lang" class="external-link">Class</a>&lt;? extends <a href="../../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&gt;&nbsp;relClass,
<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Class.html" title="class or interface in java.lang" class="external-link">Class</a>&lt;? extends @Nullable M&gt;&nbsp;metadataClass)</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4 method-summary-table-tab6">
<div class="block"><span class="deprecated-label">Deprecated.</span></div>
</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4 method-summary-table-tab6"><code>boolean</code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4 method-summary-table-tab6"><code><a href="#equals(java.lang.Object)" class="member-name-link">equals</a><wbr>(@Nullable <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a>&nbsp;obj)</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4 method-summary-table-tab6">
<div class="block"><span class="deprecated-label">Deprecated.</span></div>
&nbsp;</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4 method-summary-table-tab6"><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/List.html" title="class or interface in java.util" class="external-link">List</a>&lt;<a href="../../rel/metadata/MetadataHandler.html" title="interface in org.apache.calcite.rel.metadata">MetadataHandler</a>&lt;?&gt;&gt;</code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4 method-summary-table-tab6"><code><a href="#handlers(java.lang.Class)" class="member-name-link">handlers</a><wbr>(<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Class.html" title="class or interface in java.lang" class="external-link">Class</a>&lt;? extends <a href="../../rel/metadata/MetadataHandler.html" title="interface in org.apache.calcite.rel.metadata">MetadataHandler</a>&lt;?&gt;&gt;&nbsp;handlerClass)</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4 method-summary-table-tab6">
<div class="block"><span class="deprecated-label">Deprecated.</span></div>
<div class="block">Retrieves a list of <a href="../../rel/metadata/MetadataHandler.html" title="interface in org.apache.calcite.rel.metadata"><code>MetadataHandler</code></a> for implements a particular
<a href="../../rel/metadata/MetadataHandler.html" title="interface in org.apache.calcite.rel.metadata"><code>MetadataHandler</code></a>.class.</div>
</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4 method-summary-table-tab6"><code>&lt;M extends <a href="../../rel/metadata/Metadata.html" title="interface in org.apache.calcite.rel.metadata">Metadata</a>&gt;<br>com.google.common.collect.Multimap&lt;<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/reflect/Method.html" title="class or interface in java.lang.reflect" class="external-link">Method</a>,<wbr><a href="../../rel/metadata/MetadataHandler.html" title="interface in org.apache.calcite.rel.metadata">MetadataHandler</a>&lt;M&gt;&gt;</code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4 method-summary-table-tab6"><code><a href="#handlers(org.apache.calcite.rel.metadata.MetadataDef)" class="member-name-link">handlers</a><wbr>(<a href="../../rel/metadata/MetadataDef.html" title="class in org.apache.calcite.rel.metadata">MetadataDef</a>&lt;M&gt;&nbsp;def)</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4 method-summary-table-tab6">
<div class="block"><span class="deprecated-label">Deprecated.</span></div>
</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4 method-summary-table-tab6"><code>int</code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4 method-summary-table-tab6"><code><a href="#hashCode()" class="member-name-link">hashCode</a>()</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4 method-summary-table-tab6">
<div class="block"><span class="deprecated-label">Deprecated.</span></div>
&nbsp;</div>
</div>
</div>
</div>
<div class="inherited-list">
<h3 id="methods-inherited-from-class-java.lang.Object">Methods inherited from class&nbsp;java.lang.<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a></h3>
<code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#clone()" title="class or interface in java.lang" class="external-link">clone</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#finalize()" title="class or interface in java.lang" class="external-link">finalize</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#getClass()" title="class or interface in java.lang" class="external-link">getClass</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#notify()" title="class or interface in java.lang" class="external-link">notify</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#notifyAll()" title="class or interface in java.lang" class="external-link">notifyAll</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#toString()" title="class or interface in java.lang" class="external-link">toString</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#wait()" title="class or interface in java.lang" class="external-link">wait</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#wait(long)" title="class or interface in java.lang" class="external-link">wait</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#wait(long,int)" title="class or interface in java.lang" class="external-link">wait</a></code></div>
</section>
</li>
</ul>
</section>
<section class="details">
<ul class="details-list">
<!-- ========= CONSTRUCTOR DETAIL ======== -->
<li>
<section class="constructor-details" id="constructor-detail">
<h2>Constructor Details</h2>
<ul class="member-list">
<li>
<section class="detail" id="&lt;init&gt;()">
<h3>VolcanoRelMetadataProvider</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="element-name">VolcanoRelMetadataProvider</span>()</div>
<div class="deprecation-block"><span class="deprecated-label">Deprecated.</span></div>
</section>
</li>
</ul>
</section>
</li>
<!-- ============ METHOD DETAIL ========== -->
<li>
<section class="method-details" id="method-detail">
<h2>Method Details</h2>
<ul class="member-list">
<li>
<section class="detail" id="equals(java.lang.Object)">
<h3>equals</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">boolean</span>&nbsp;<span class="element-name">equals</span><wbr><span class="parameters">(@Nullable <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a>&nbsp;obj)</span></div>
<div class="deprecation-block"><span class="deprecated-label">Deprecated.</span></div>
<dl class="notes">
<dt>Overrides:</dt>
<dd><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#equals(java.lang.Object)" title="class or interface in java.lang" class="external-link">equals</a></code>&nbsp;in class&nbsp;<code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a></code></dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="hashCode()">
<h3>hashCode</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">int</span>&nbsp;<span class="element-name">hashCode</span>()</div>
<div class="deprecation-block"><span class="deprecated-label">Deprecated.</span></div>
<dl class="notes">
<dt>Overrides:</dt>
<dd><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#hashCode()" title="class or interface in java.lang" class="external-link">hashCode</a></code>&nbsp;in class&nbsp;<code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a></code></dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="apply(java.lang.Class,java.lang.Class)">
<h3>apply</h3>
<div class="member-signature"><span class="annotations"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Deprecated.html" title="class or interface in java.lang" class="external-link">@Deprecated</a>
</span><span class="modifiers">public</span>&nbsp;<span class="type-parameters">&lt;@Nullable M extends @Nullable <a href="../../rel/metadata/Metadata.html" title="interface in org.apache.calcite.rel.metadata">Metadata</a>&gt;</span>
<span class="return-type">@Nullable <a href="../../rel/metadata/UnboundMetadata.html" title="interface in org.apache.calcite.rel.metadata">UnboundMetadata</a>&lt;M&gt;</span>&nbsp;<span class="element-name">apply</span><wbr><span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Class.html" title="class or interface in java.lang" class="external-link">Class</a>&lt;? extends <a href="../../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&gt;&nbsp;relClass,
<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Class.html" title="class or interface in java.lang" class="external-link">Class</a>&lt;? extends @Nullable M&gt;&nbsp;metadataClass)</span></div>
<div class="deprecation-block"><span class="deprecated-label">Deprecated.</span></div>
<div class="block"><span class="descfrm-type-label">Description copied from interface:&nbsp;<code><a href="../../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&lt;RelNode, Metadata&gt; function =
provider.apply(LogicalFilter.class, Selectivity.class};
Selectivity selectivity = function.apply(filter);
Double d = selectivity.selectivity(predicate);
</pre></blockquote></div>
<dl class="notes">
<dt>Specified by:</dt>
<dd><code><a href="../../rel/metadata/RelMetadataProvider.html#apply(java.lang.Class,java.lang.Class)">apply</a></code>&nbsp;in interface&nbsp;<code><a href="../../rel/metadata/RelMetadataProvider.html" title="interface in org.apache.calcite.rel.metadata">RelMetadataProvider</a></code></dd>
<dt>Parameters:</dt>
<dd><code>relClass</code> - Type of relational expression</dd>
<dd><code>metadataClass</code> - Type of metadata</dd>
<dt>Returns:</dt>
<dd>Function that will field a metadata instance; or null if this
provider cannot supply metadata of this type</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="handlers(org.apache.calcite.rel.metadata.MetadataDef)">
<h3>handlers</h3>
<div class="member-signature"><span class="annotations"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Deprecated.html" title="class or interface in java.lang" class="external-link">@Deprecated</a>
</span><span class="modifiers">public</span>&nbsp;<span class="type-parameters">&lt;M extends <a href="../../rel/metadata/Metadata.html" title="interface in org.apache.calcite.rel.metadata">Metadata</a>&gt;</span>
<span class="return-type">com.google.common.collect.Multimap&lt;<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/reflect/Method.html" title="class or interface in java.lang.reflect" class="external-link">Method</a>,<wbr><a href="../../rel/metadata/MetadataHandler.html" title="interface in org.apache.calcite.rel.metadata">MetadataHandler</a>&lt;M&gt;&gt;</span>&nbsp;<span class="element-name">handlers</span><wbr><span class="parameters">(<a href="../../rel/metadata/MetadataDef.html" title="class in org.apache.calcite.rel.metadata">MetadataDef</a>&lt;M&gt;&nbsp;def)</span></div>
<div class="deprecation-block"><span class="deprecated-label">Deprecated.</span></div>
<dl class="notes">
<dt>Specified by:</dt>
<dd><code><a href="../../rel/metadata/RelMetadataProvider.html#handlers(org.apache.calcite.rel.metadata.MetadataDef)">handlers</a></code>&nbsp;in interface&nbsp;<code><a href="../../rel/metadata/RelMetadataProvider.html" title="interface in org.apache.calcite.rel.metadata">RelMetadataProvider</a></code></dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="handlers(java.lang.Class)">
<h3>handlers</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/List.html" title="class or interface in java.util" class="external-link">List</a>&lt;<a href="../../rel/metadata/MetadataHandler.html" title="interface in org.apache.calcite.rel.metadata">MetadataHandler</a>&lt;?&gt;&gt;</span>&nbsp;<span class="element-name">handlers</span><wbr><span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Class.html" title="class or interface in java.lang" class="external-link">Class</a>&lt;? extends <a href="../../rel/metadata/MetadataHandler.html" title="interface in org.apache.calcite.rel.metadata">MetadataHandler</a>&lt;?&gt;&gt;&nbsp;handlerClass)</span></div>
<div class="deprecation-block"><span class="deprecated-label">Deprecated.</span></div>
<div class="block"><span class="descfrm-type-label">Description copied from interface:&nbsp;<code><a href="../../rel/metadata/RelMetadataProvider.html#handlers(java.lang.Class)">RelMetadataProvider</a></code></span></div>
<div class="block">Retrieves a list of <a href="../../rel/metadata/MetadataHandler.html" title="interface in org.apache.calcite.rel.metadata"><code>MetadataHandler</code></a> for implements a particular
<a href="../../rel/metadata/MetadataHandler.html" title="interface in org.apache.calcite.rel.metadata"><code>MetadataHandler</code></a>.class. The resolution order is specificity of the relNode class,
with preference given to handlers that occur earlier in the list.
For instance, given a return list of {A, B, C} where A implements RelNode and Scan,
B implements Scan, and C implements LogicalScan and Filter.
Scan dispatches to a.method(Scan)
LogicalFilter dispatches to c.method(Filter).
LogicalScan dispatches to c.method(LogicalScan).
Aggregate dispatches to a.method(RelNode).
The behavior is undefined if the class hierarchy for dispatching is not a tree.</div>
<dl class="notes">
<dt>Specified by:</dt>
<dd><code><a href="../../rel/metadata/RelMetadataProvider.html#handlers(java.lang.Class)">handlers</a></code>&nbsp;in interface&nbsp;<code><a href="../../rel/metadata/RelMetadataProvider.html" title="interface in org.apache.calcite.rel.metadata">RelMetadataProvider</a></code></dd>
</dl>
</section>
</li>
</ul>
</section>
</li>
</ul>
</section>
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