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<title>EnumerableConvention (Apache Calcite API)</title>
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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.adapter.enumerable</a></div>
<h1 title="Enum EnumerableConvention" class="title">Enum EnumerableConvention</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"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Enum.html" title="class or interface in java.lang" class="external-link">java.lang.Enum</a>&lt;<a href="EnumerableConvention.html" title="enum in org.apache.calcite.adapter.enumerable">EnumerableConvention</a>&gt;
<div class="inheritance">org.apache.calcite.adapter.enumerable.EnumerableConvention</div>
</div>
</div>
<section class="class-description" id="class-description">
<dl class="notes">
<dt>All Implemented Interfaces:</dt>
<dd><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/Serializable.html" title="class or interface in java.io" class="external-link">Serializable</a></code>, <code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Comparable.html" title="class or interface in java.lang" class="external-link">Comparable</a>&lt;<a href="EnumerableConvention.html" title="enum in org.apache.calcite.adapter.enumerable">EnumerableConvention</a>&gt;</code>, <code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/constant/Constable.html" title="class or interface in java.lang.constant" class="external-link">Constable</a></code>, <code><a href="../../plan/Convention.html" title="interface in org.apache.calcite.plan">Convention</a></code>, <code><a href="../../plan/RelTrait.html" title="interface in org.apache.calcite.plan">RelTrait</a></code></dd>
</dl>
<hr>
<div class="type-signature"><span class="modifiers">public enum </span><span class="element-name type-name-label">EnumerableConvention</span>
<span class="extends-implements">extends <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Enum.html" title="class or interface in java.lang" class="external-link">Enum</a>&lt;<a href="EnumerableConvention.html" title="enum in org.apache.calcite.adapter.enumerable">EnumerableConvention</a>&gt;
implements <a href="../../plan/Convention.html" title="interface in org.apache.calcite.plan">Convention</a></span></div>
<div class="block">Family of calling conventions that return results as an
<a href="../../linq4j/Enumerable.html" title="interface in org.apache.calcite.linq4j"><code>Enumerable</code></a>.</div>
</section>
<section class="summary">
<ul class="summary-list">
<!-- ======== NESTED CLASS SUMMARY ======== -->
<li>
<section class="nested-class-summary" id="nested-class-summary">
<h2>Nested Class Summary</h2>
<div class="inherited-list">
<h2 id="nested-classes-inherited-from-class-java.lang.Enum">Nested classes/interfaces inherited from class&nbsp;java.lang.<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Enum.html" title="class or interface in java.lang" class="external-link">Enum</a></h2>
<code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Enum.EnumDesc.html" title="class or interface in java.lang" class="external-link">Enum.EnumDesc</a>&lt;<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Enum.EnumDesc.html" title="class or interface in java.lang" class="external-link">E</a> extends <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Enum.html" title="class or interface in java.lang" class="external-link">Enum</a>&lt;<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Enum.EnumDesc.html" title="class or interface in java.lang" class="external-link">E</a>&gt;&gt;</code></div>
<div class="inherited-list">
<h2 id="nested-classes-inherited-from-class-org.apache.calcite.plan.Convention">Nested classes/interfaces inherited from interface&nbsp;org.apache.calcite.plan.<a href="../../plan/Convention.html" title="interface in org.apache.calcite.plan">Convention</a></h2>
<code><a href="../../plan/Convention.Impl.html" title="class in org.apache.calcite.plan">Convention.Impl</a></code></div>
</section>
</li>
<!-- =========== ENUM CONSTANT SUMMARY =========== -->
<li>
<section class="constants-summary" id="enum-constant-summary">
<h2>Enum Constant Summary</h2>
<div class="caption"><span>Enum Constants</span></div>
<div class="summary-table two-column-summary">
<div class="table-header col-first">Enum Constant</div>
<div class="table-header col-last">Description</div>
<div class="col-first even-row-color"><code><a href="#INSTANCE" class="member-name-link">INSTANCE</a></code></div>
<div class="col-last even-row-color">&nbsp;</div>
</div>
</section>
</li>
<!-- =========== FIELD SUMMARY =========== -->
<li>
<section class="field-summary" id="field-summary">
<h2>Field Summary</h2>
<div class="caption"><span>Fields</span></div>
<div class="summary-table three-column-summary">
<div class="table-header col-first">Modifier and Type</div>
<div class="table-header col-second">Field</div>
<div class="table-header col-last">Description</div>
<div class="col-first even-row-color"><code>static final double</code></div>
<div class="col-second even-row-color"><code><a href="#COST_MULTIPLIER" class="member-name-link">COST_MULTIPLIER</a></code></div>
<div class="col-last even-row-color">
<div class="block">Cost of an enumerable node versus implementing an equivalent node in a
"typical" calling convention.</div>
</div>
</div>
<div class="inherited-list">
<h3 id="fields-inherited-from-class-org.apache.calcite.plan.Convention">Fields inherited from interface&nbsp;org.apache.calcite.plan.<a href="../../plan/Convention.html" title="interface in org.apache.calcite.plan">Convention</a></h3>
<code><a href="../../plan/Convention.html#NONE">NONE</a></code></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-tab1" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab1', 3)" class="table-tab">Static 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></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"><code>boolean</code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#canConvertConvention(org.apache.calcite.plan.Convention)" class="member-name-link">canConvertConvention</a><wbr>(<a href="../../plan/Convention.html" title="interface in org.apache.calcite.plan">Convention</a>&nbsp;toConvention)</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Returns whether we should convert from this convention to
<code>toConvention</code>.</div>
</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>@Nullable <a href="../../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a></code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#enforce(org.apache.calcite.rel.RelNode,org.apache.calcite.plan.RelTraitSet)" class="member-name-link">enforce</a><wbr>(<a href="../../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;input,
<a href="../../plan/RelTraitSet.html" title="class in org.apache.calcite.plan">RelTraitSet</a>&nbsp;required)</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Given an input and required traits, returns the corresponding
enforcer rel nodes, like physical Sort, Exchange etc.</div>
</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><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></code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#getInterface()" class="member-name-link">getInterface</a>()</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">&nbsp;</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a></code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#getName()" class="member-name-link">getName</a>()</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">&nbsp;</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="../../rel/core/RelFactories.Struct.html" title="class in org.apache.calcite.rel.core">RelFactories.Struct</a></code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#getRelFactories()" class="member-name-link">getRelFactories</a>()</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Return RelFactories struct for this convention.</div>
</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="../../plan/RelTraitDef.html" title="class in org.apache.calcite.plan">RelTraitDef</a></code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#getTraitDef()" class="member-name-link">getTraitDef</a>()</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Returns the RelTraitDef that defines this RelTrait.</div>
</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>void</code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#register(org.apache.calcite.plan.RelOptPlanner)" class="member-name-link">register</a><wbr>(<a href="../../plan/RelOptPlanner.html" title="interface in org.apache.calcite.plan">RelOptPlanner</a>&nbsp;planner)</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Registers a trait instance with the planner.</div>
</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>boolean</code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#satisfies(org.apache.calcite.plan.RelTrait)" class="member-name-link">satisfies</a><wbr>(<a href="../../plan/RelTrait.html" title="interface in org.apache.calcite.plan">RelTrait</a>&nbsp;trait)</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Returns whether this trait satisfies a given trait.</div>
</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a></code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#toString()" class="member-name-link">toString</a>()</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Returns a succinct name for this trait.</div>
</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>boolean</code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#useAbstractConvertersForConversion(org.apache.calcite.plan.RelTraitSet,org.apache.calcite.plan.RelTraitSet)" class="member-name-link">useAbstractConvertersForConversion</a><wbr>(<a href="../../plan/RelTraitSet.html" title="class in org.apache.calcite.plan">RelTraitSet</a>&nbsp;fromTraits,
<a href="../../plan/RelTraitSet.html" title="class in org.apache.calcite.plan">RelTraitSet</a>&nbsp;toTraits)</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Returns whether we should convert from this trait set to the other trait
set.</div>
</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code>static <a href="EnumerableConvention.html" title="enum in org.apache.calcite.adapter.enumerable">EnumerableConvention</a></code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code><a href="#valueOf(java.lang.String)" class="member-name-link">valueOf</a><wbr>(<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a>&nbsp;name)</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4">
<div class="block">Returns the enum constant of this type with the specified name.</div>
</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code>static <a href="EnumerableConvention.html" title="enum in org.apache.calcite.adapter.enumerable">EnumerableConvention</a>[]</code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code><a href="#values()" class="member-name-link">values</a>()</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4">
<div class="block">Returns an array containing the constants of this enum type, in
the order they are declared.</div>
</div>
</div>
</div>
</div>
<div class="inherited-list">
<h3 id="methods-inherited-from-class-java.lang.Enum">Methods inherited from class&nbsp;java.lang.<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Enum.html" title="class or interface in java.lang" class="external-link">Enum</a></h3>
<code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Enum.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/Enum.html#compareTo(E)" title="class or interface in java.lang" class="external-link">compareTo</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Enum.html#describeConstable()" title="class or interface in java.lang" class="external-link">describeConstable</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Enum.html#equals(java.lang.Object)" title="class or interface in java.lang" class="external-link">equals</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Enum.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/Enum.html#getDeclaringClass()" title="class or interface in java.lang" class="external-link">getDeclaringClass</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Enum.html#hashCode()" title="class or interface in java.lang" class="external-link">hashCode</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Enum.html#name()" title="class or interface in java.lang" class="external-link">name</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Enum.html#ordinal()" title="class or interface in java.lang" class="external-link">ordinal</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Enum.html#valueOf(java.lang.Class,java.lang.String)" title="class or interface in java.lang" class="external-link">valueOf</a></code></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#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#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>
<div class="inherited-list">
<h3 id="methods-inherited-from-class-org.apache.calcite.plan.RelTrait">Methods inherited from interface&nbsp;org.apache.calcite.plan.<a href="../../plan/RelTrait.html" title="interface in org.apache.calcite.plan">RelTrait</a></h3>
<code><a href="../../plan/RelTrait.html#apply(org.apache.calcite.util.mapping.Mappings.TargetMapping)">apply</a>, <a href="../../plan/RelTrait.html#equals(java.lang.Object)">equals</a>, <a href="../../plan/RelTrait.html#hashCode()">hashCode</a>, <a href="../../plan/RelTrait.html#isDefault()">isDefault</a></code></div>
</section>
</li>
</ul>
</section>
<section class="details">
<ul class="details-list">
<!-- ============ ENUM CONSTANT DETAIL =========== -->
<li>
<section class="constant-details" id="enum-constant-detail">
<h2>Enum Constant Details</h2>
<ul class="member-list">
<li>
<section class="detail" id="INSTANCE">
<h3>INSTANCE</h3>
<div class="member-signature"><span class="modifiers">public static final</span>&nbsp;<span class="return-type"><a href="EnumerableConvention.html" title="enum in org.apache.calcite.adapter.enumerable">EnumerableConvention</a></span>&nbsp;<span class="element-name">INSTANCE</span></div>
</section>
</li>
</ul>
</section>
</li>
<!-- ============ FIELD DETAIL =========== -->
<li>
<section class="field-details" id="field-detail">
<h2>Field Details</h2>
<ul class="member-list">
<li>
<section class="detail" id="COST_MULTIPLIER">
<h3>COST_MULTIPLIER</h3>
<div class="member-signature"><span class="modifiers">public static final</span>&nbsp;<span class="return-type">double</span>&nbsp;<span class="element-name">COST_MULTIPLIER</span></div>
<div class="block">Cost of an enumerable node versus implementing an equivalent node in a
"typical" calling convention.</div>
<dl class="notes">
<dt>See Also:</dt>
<dd>
<ul class="see-list">
<li><a href="../../../../../constant-values.html#org.apache.calcite.adapter.enumerable.EnumerableConvention.COST_MULTIPLIER">Constant Field Values</a></li>
</ul>
</dd>
</dl>
</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="values()">
<h3>values</h3>
<div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type"><a href="EnumerableConvention.html" title="enum in org.apache.calcite.adapter.enumerable">EnumerableConvention</a>[]</span>&nbsp;<span class="element-name">values</span>()</div>
<div class="block">Returns an array containing the constants of this enum type, in
the order they are declared.</div>
<dl class="notes">
<dt>Returns:</dt>
<dd>an array containing the constants of this enum type, in the order they are declared</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="valueOf(java.lang.String)">
<h3>valueOf</h3>
<div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type"><a href="EnumerableConvention.html" title="enum in org.apache.calcite.adapter.enumerable">EnumerableConvention</a></span>&nbsp;<span class="element-name">valueOf</span><wbr><span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a>&nbsp;name)</span></div>
<div class="block">Returns the enum constant of this type with the specified name.
The string must match <i>exactly</i> an identifier used to declare an
enum constant in this type. (Extraneous whitespace characters are
not permitted.)</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>name</code> - the name of the enum constant to be returned.</dd>
<dt>Returns:</dt>
<dd>the enum constant with the specified name</dd>
<dt>Throws:</dt>
<dd><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/IllegalArgumentException.html" title="class or interface in java.lang" class="external-link">IllegalArgumentException</a></code> - if this enum type has no constant with the specified name</dd>
<dd><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/NullPointerException.html" title="class or interface in java.lang" class="external-link">NullPointerException</a></code> - if the argument is null</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="toString()">
<h3>toString</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/lang/String.html" title="class or interface in java.lang" class="external-link">String</a></span>&nbsp;<span class="element-name">toString</span>()</div>
<div class="block"><span class="descfrm-type-label">Description copied from interface:&nbsp;<code><a href="../../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 class="notes">
<dt>Specified by:</dt>
<dd><code><a href="../../plan/RelTrait.html#toString()">toString</a></code>&nbsp;in interface&nbsp;<code><a href="../../plan/RelTrait.html" title="interface in org.apache.calcite.plan">RelTrait</a></code></dd>
<dt>Overrides:</dt>
<dd><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Enum.html#toString()" title="class or interface in java.lang" class="external-link">toString</a></code>&nbsp;in class&nbsp;<code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Enum.html" title="class or interface in java.lang" class="external-link">Enum</a>&lt;<a href="EnumerableConvention.html" title="enum in org.apache.calcite.adapter.enumerable">EnumerableConvention</a>&gt;</code></dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="getInterface()">
<h3>getInterface</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/lang/Class.html" title="class or interface in java.lang" class="external-link">Class</a></span>&nbsp;<span class="element-name">getInterface</span>()</div>
<dl class="notes">
<dt>Specified by:</dt>
<dd><code><a href="../../plan/Convention.html#getInterface()">getInterface</a></code>&nbsp;in interface&nbsp;<code><a href="../../plan/Convention.html" title="interface in org.apache.calcite.plan">Convention</a></code></dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="getName()">
<h3>getName</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/lang/String.html" title="class or interface in java.lang" class="external-link">String</a></span>&nbsp;<span class="element-name">getName</span>()</div>
<dl class="notes">
<dt>Specified by:</dt>
<dd><code><a href="../../plan/Convention.html#getName()">getName</a></code>&nbsp;in interface&nbsp;<code><a href="../../plan/Convention.html" title="interface in org.apache.calcite.plan">Convention</a></code></dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="enforce(org.apache.calcite.rel.RelNode,org.apache.calcite.plan.RelTraitSet)">
<h3>enforce</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">@Nullable <a href="../../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a></span>&nbsp;<span class="element-name">enforce</span><wbr><span class="parameters">(<a href="../../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;input,
<a href="../../plan/RelTraitSet.html" title="class in org.apache.calcite.plan">RelTraitSet</a>&nbsp;required)</span></div>
<div class="block"><span class="descfrm-type-label">Description copied from interface:&nbsp;<code><a href="../../plan/Convention.html#enforce(org.apache.calcite.rel.RelNode,org.apache.calcite.plan.RelTraitSet)">Convention</a></code></span></div>
<div class="block">Given an input and required traits, returns the corresponding
enforcer rel nodes, like physical Sort, Exchange etc.</div>
<dl class="notes">
<dt>Specified by:</dt>
<dd><code><a href="../../plan/Convention.html#enforce(org.apache.calcite.rel.RelNode,org.apache.calcite.plan.RelTraitSet)">enforce</a></code>&nbsp;in interface&nbsp;<code><a href="../../plan/Convention.html" title="interface in org.apache.calcite.plan">Convention</a></code></dd>
<dt>Parameters:</dt>
<dd><code>input</code> - The input RelNode</dd>
<dd><code>required</code> - The required traits</dd>
<dt>Returns:</dt>
<dd>Physical enforcer that satisfies the required traitSet,
or <code>null</code> if trait enforcement is not allowed or the
required traitSet can't be satisfied.</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="getTraitDef()">
<h3>getTraitDef</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type"><a href="../../plan/RelTraitDef.html" title="class in org.apache.calcite.plan">RelTraitDef</a></span>&nbsp;<span class="element-name">getTraitDef</span>()</div>
<div class="block"><span class="descfrm-type-label">Description copied from interface:&nbsp;<code><a href="../../plan/RelTrait.html#getTraitDef()">RelTrait</a></code></span></div>
<div class="block">Returns the RelTraitDef that defines this RelTrait.</div>
<dl class="notes">
<dt>Specified by:</dt>
<dd><code><a href="../../plan/RelTrait.html#getTraitDef()">getTraitDef</a></code>&nbsp;in interface&nbsp;<code><a href="../../plan/RelTrait.html" title="interface in org.apache.calcite.plan">RelTrait</a></code></dd>
<dt>Returns:</dt>
<dd>the RelTraitDef that defines this RelTrait</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="satisfies(org.apache.calcite.plan.RelTrait)">
<h3>satisfies</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">boolean</span>&nbsp;<span class="element-name">satisfies</span><wbr><span class="parameters">(<a href="../../plan/RelTrait.html" title="interface in org.apache.calcite.plan">RelTrait</a>&nbsp;trait)</span></div>
<div class="block"><span class="descfrm-type-label">Description copied from interface:&nbsp;<code><a href="../../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 class="notes">
<dt>Specified by:</dt>
<dd><code><a href="../../plan/RelTrait.html#satisfies(org.apache.calcite.plan.RelTrait)">satisfies</a></code>&nbsp;in interface&nbsp;<code><a href="../../plan/RelTrait.html" title="interface in org.apache.calcite.plan">RelTrait</a></code></dd>
<dt>Parameters:</dt>
<dd><code>trait</code> - Given trait</dd>
<dt>Returns:</dt>
<dd>Whether this trait subsumes a given trait</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="register(org.apache.calcite.plan.RelOptPlanner)">
<h3>register</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">void</span>&nbsp;<span class="element-name">register</span><wbr><span class="parameters">(<a href="../../plan/RelOptPlanner.html" title="interface in org.apache.calcite.plan">RelOptPlanner</a>&nbsp;planner)</span></div>
<div class="block"><span class="descfrm-type-label">Description copied from interface:&nbsp;<code><a href="../../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 class="notes">
<dt>Specified by:</dt>
<dd><code><a href="../../plan/RelTrait.html#register(org.apache.calcite.plan.RelOptPlanner)">register</a></code>&nbsp;in interface&nbsp;<code><a href="../../plan/RelTrait.html" title="interface in org.apache.calcite.plan">RelTrait</a></code></dd>
<dt>Parameters:</dt>
<dd><code>planner</code> - Planner</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="canConvertConvention(org.apache.calcite.plan.Convention)">
<h3>canConvertConvention</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">boolean</span>&nbsp;<span class="element-name">canConvertConvention</span><wbr><span class="parameters">(<a href="../../plan/Convention.html" title="interface in org.apache.calcite.plan">Convention</a>&nbsp;toConvention)</span></div>
<div class="block"><span class="descfrm-type-label">Description copied from interface:&nbsp;<code><a href="../../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="../../plan/ConventionTraitDef.html" title="class in org.apache.calcite.plan"><code>ConventionTraitDef</code></a>.</div>
<dl class="notes">
<dt>Specified by:</dt>
<dd><code><a href="../../plan/Convention.html#canConvertConvention(org.apache.calcite.plan.Convention)">canConvertConvention</a></code>&nbsp;in interface&nbsp;<code><a href="../../plan/Convention.html" title="interface in org.apache.calcite.plan">Convention</a></code></dd>
<dt>Parameters:</dt>
<dd><code>toConvention</code> - Desired convention to convert to</dd>
<dt>Returns:</dt>
<dd>Whether we should convert from this convention to toConvention</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="useAbstractConvertersForConversion(org.apache.calcite.plan.RelTraitSet,org.apache.calcite.plan.RelTraitSet)">
<h3>useAbstractConvertersForConversion</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">boolean</span>&nbsp;<span class="element-name">useAbstractConvertersForConversion</span><wbr><span class="parameters">(<a href="../../plan/RelTraitSet.html" title="class in org.apache.calcite.plan">RelTraitSet</a>&nbsp;fromTraits,
<a href="../../plan/RelTraitSet.html" title="class in org.apache.calcite.plan">RelTraitSet</a>&nbsp;toTraits)</span></div>
<div class="block"><span class="descfrm-type-label">Description copied from interface:&nbsp;<code><a href="../../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 class="notes">
<dt>Specified by:</dt>
<dd><code><a href="../../plan/Convention.html#useAbstractConvertersForConversion(org.apache.calcite.plan.RelTraitSet,org.apache.calcite.plan.RelTraitSet)">useAbstractConvertersForConversion</a></code>&nbsp;in interface&nbsp;<code><a href="../../plan/Convention.html" title="interface in org.apache.calcite.plan">Convention</a></code></dd>
<dt>Parameters:</dt>
<dd><code>fromTraits</code> - Traits of the RelNode that we are converting from</dd>
<dd><code>toTraits</code> - Target traits</dd>
<dt>Returns:</dt>
<dd>Whether we should add converters</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="getRelFactories()">
<h3>getRelFactories</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type"><a href="../../rel/core/RelFactories.Struct.html" title="class in org.apache.calcite.rel.core">RelFactories.Struct</a></span>&nbsp;<span class="element-name">getRelFactories</span>()</div>
<div class="block"><span class="descfrm-type-label">Description copied from interface:&nbsp;<code><a href="../../plan/Convention.html#getRelFactories()">Convention</a></code></span></div>
<div class="block">Return RelFactories struct for this convention. It can can be used to
build RelNode.</div>
<dl class="notes">
<dt>Specified by:</dt>
<dd><code><a href="../../plan/Convention.html#getRelFactories()">getRelFactories</a></code>&nbsp;in interface&nbsp;<code><a href="../../plan/Convention.html" title="interface in org.apache.calcite.plan">Convention</a></code></dd>
</dl>
</section>
</li>
</ul>
</section>
</li>
</ul>
</section>
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