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<div class="subTitle">org.apache.calcite.plan</div>
<h2 title="类 RelOptAbstractTable" class="title">类 RelOptAbstractTable</h2>
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<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>
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<ul class="inheritance">
<li>org.apache.calcite.plan.RelOptAbstractTable</li>
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<div class="description">
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<dl>
<dt>所有已实现的接口:</dt>
<dd><a href="../../../../org/apache/calcite/plan/RelOptTable.html" title="org.apache.calcite.plan中的接口">RelOptTable</a>, <a href="../../../../org/apache/calcite/schema/Wrapper.html" title="org.apache.calcite.schema中的接口">Wrapper</a></dd>
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<pre>public abstract class <span class="typeNameLabel">RelOptAbstractTable</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/plan/RelOptTable.html" title="org.apache.calcite.plan中的接口">RelOptTable</a></pre>
<div class="block">Partial implementation of <a href="../../../../org/apache/calcite/plan/RelOptTable.html" title="org.apache.calcite.plan中的接口"><code>RelOptTable</code></a>.</div>
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<h3>嵌套类概要</h3>
<ul class="blockList">
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<h3>从接口继承的嵌套类/接口&nbsp;org.apache.calcite.plan.<a href="../../../../org/apache/calcite/plan/RelOptTable.html" title="org.apache.calcite.plan中的接口">RelOptTable</a></h3>
<code><a href="../../../../org/apache/calcite/plan/RelOptTable.ToRelContext.html" title="org.apache.calcite.plan中的接口">RelOptTable.ToRelContext</a>, <a href="../../../../org/apache/calcite/plan/RelOptTable.ViewExpander.html" title="org.apache.calcite.plan中的接口">RelOptTable.ViewExpander</a></code></li>
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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">&nbsp;</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>
<tr class="altColor">
<td class="colFirst"><code>protected <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/plan/RelOptAbstractTable.html#name">name</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected <a href="../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptAbstractTable.html#rowType">rowType</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected <a href="../../../../org/apache/calcite/plan/RelOptSchema.html" title="org.apache.calcite.plan中的接口">RelOptSchema</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptAbstractTable.html#schema">schema</a></span></code>&nbsp;</td>
</tr>
</table>
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<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">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">限定符</th>
<th class="colLast" scope="col">构造器和说明</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected </code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptAbstractTable.html#RelOptAbstractTable-org.apache.calcite.plan.RelOptSchema-java.lang.String-org.apache.calcite.rel.type.RelDataType-">RelOptAbstractTable</a></span>(<a href="../../../../org/apache/calcite/plan/RelOptSchema.html" title="org.apache.calcite.plan中的接口">RelOptSchema</a>&nbsp;schema,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="java.lang中的类或接口">String</a>&nbsp;name,
<a href="../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;rowType)</code>&nbsp;</td>
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<h3>方法概要</h3>
<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="方法概要表, 列表方法和解释">
<caption><span id="t0" class="activeTableTab"><span>所有方法</span><span class="tabEnd">&nbsp;</span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">实例方法</a></span><span class="tabEnd">&nbsp;</span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">具体方法</a></span><span class="tabEnd">&nbsp;</span></span></caption>
<tr>
<th class="colFirst" scope="col">限定符和类型</th>
<th class="colLast" scope="col">方法和说明</th>
</tr>
<tr id="i0" class="altColor">
<td class="colFirst"><code><a href="../../../../org/apache/calcite/plan/RelOptTable.html" title="org.apache.calcite.plan中的接口">RelOptTable</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptAbstractTable.html#extend-java.util.List-">extend</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="java.util中的类或接口">List</a>&lt;<a href="../../../../org/apache/calcite/rel/type/RelDataTypeField.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeField</a>&gt;&nbsp;extendedFields)</code>
<div class="block">Returns a table with the given extra fields.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="java.util中的类或接口">List</a>&lt;<a href="../../../../org/apache/calcite/rel/RelCollation.html" title="org.apache.calcite.rel中的接口">RelCollation</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptAbstractTable.html#getCollationList--">getCollationList</a></span>()</code>
<div class="block">Returns a description of the physical ordering (or orderings) of the rows
returned from this table.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="java.util中的类或接口">List</a>&lt;<a href="../../../../org/apache/calcite/schema/ColumnStrategy.html" title="org.apache.calcite.schema中的枚举">ColumnStrategy</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptAbstractTable.html#getColumnStrategies--">getColumnStrategies</a></span>()</code>
<div class="block">Returns a list describing how each column is populated.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code><a href="../../../../org/apache/calcite/rel/RelDistribution.html" title="org.apache.calcite.rel中的接口">RelDistribution</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptAbstractTable.html#getDistribution--">getDistribution</a></span>()</code>
<div class="block">Returns a description of the physical distribution of the rows
in this table.</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code><a href="../../../../org/apache/calcite/linq4j/tree/Expression.html" title="org.apache.calcite.linq4j.tree中的类">Expression</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptAbstractTable.html#getExpression-java.lang.Class-">getExpression</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>&nbsp;clazz)</code>
<div class="block">Generates code for this table.</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="java.util中的类或接口">List</a>&lt;<a href="../../../../org/apache/calcite/util/ImmutableBitSet.html" title="org.apache.calcite.util中的类">ImmutableBitSet</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptAbstractTable.html#getKeys--">getKeys</a></span>()</code>
<div class="block">Returns a list of unique keys, empty list if no key exist,
the result should be consistent with <code>isKey</code></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/plan/RelOptAbstractTable.html#getName--">getName</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="java.util中的类或接口">List</a>&lt;<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>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptAbstractTable.html#getQualifiedName--">getQualifiedName</a></span>()</code>
<div class="block">Obtains an identifier for this table.</div>
</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="java.util中的类或接口">List</a>&lt;<a href="../../../../org/apache/calcite/rel/RelReferentialConstraint.html" title="org.apache.calcite.rel中的接口">RelReferentialConstraint</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptAbstractTable.html#getReferentialConstraints--">getReferentialConstraints</a></span>()</code>
<div class="block">Returns the referential constraints existing for this table.</div>
</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code><a href="../../../../org/apache/calcite/plan/RelOptSchema.html" title="org.apache.calcite.plan中的接口">RelOptSchema</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptAbstractTable.html#getRelOptSchema--">getRelOptSchema</a></span>()</code>
<div class="block">Returns the <a href="../../../../org/apache/calcite/plan/RelOptSchema.html" title="org.apache.calcite.plan中的接口"><code>RelOptSchema</code></a> this table belongs to.</div>
</td>
</tr>
<tr id="i10" class="altColor">
<td class="colFirst"><code>double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptAbstractTable.html#getRowCount--">getRowCount</a></span>()</code>
<div class="block">Returns an estimate of the number of rows in the table.</div>
</td>
</tr>
<tr id="i11" class="rowColor">
<td class="colFirst"><code><a href="../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptAbstractTable.html#getRowType--">getRowType</a></span>()</code>
<div class="block">Describes the type of rows returned by this table.</div>
</td>
</tr>
<tr id="i12" class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptAbstractTable.html#isKey-org.apache.calcite.util.ImmutableBitSet-">isKey</a></span>(<a href="../../../../org/apache/calcite/util/ImmutableBitSet.html" title="org.apache.calcite.util中的类">ImmutableBitSet</a>&nbsp;columns)</code>
<div class="block">Returns whether the given columns are a key or a superset of a unique key
of this table.</div>
</td>
</tr>
<tr id="i13" class="rowColor">
<td class="colFirst"><code><a href="../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptAbstractTable.html#toRel-org.apache.calcite.plan.RelOptTable.ToRelContext-">toRel</a></span>(<a href="../../../../org/apache/calcite/plan/RelOptTable.ToRelContext.html" title="org.apache.calcite.plan中的接口">RelOptTable.ToRelContext</a>&nbsp;context)</code>
<div class="block">Converts this table into a <a href="../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口"><code>relational expression</code></a>.</div>
</td>
</tr>
<tr id="i14" class="altColor">
<td class="colFirst"><code>&lt;T&gt;&nbsp;T</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptAbstractTable.html#unwrap-java.lang.Class-">unwrap</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>&lt;T&gt;&nbsp;clazz)</code>
<div class="block">Finds an instance of an interface implemented by this object,
or returns null if this object does not support that interface.</div>
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<h3>从类继承的方法&nbsp;java.lang.<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/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#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/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#hashCode--" title="java.lang中的类或接口">hashCode</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>
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<h3>字段详细资料</h3>
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<h4>schema</h4>
<pre>protected final&nbsp;<a href="../../../../org/apache/calcite/plan/RelOptSchema.html" title="org.apache.calcite.plan中的接口">RelOptSchema</a> schema</pre>
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<h4>rowType</h4>
<pre>protected final&nbsp;<a href="../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a> rowType</pre>
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<h4>name</h4>
<pre>protected final&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="java.lang中的类或接口">String</a> name</pre>
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<h3>构造器详细资料</h3>
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<h4>RelOptAbstractTable</h4>
<pre>protected&nbsp;RelOptAbstractTable(<a href="../../../../org/apache/calcite/plan/RelOptSchema.html" title="org.apache.calcite.plan中的接口">RelOptSchema</a>&nbsp;schema,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="java.lang中的类或接口">String</a>&nbsp;name,
<a href="../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;rowType)</pre>
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<h3>方法详细资料</h3>
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<h4>getName</h4>
<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="java.lang中的类或接口">String</a>&nbsp;getName()</pre>
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<h4>getQualifiedName</h4>
<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="java.util中的类或接口">List</a>&lt;<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>&gt;&nbsp;getQualifiedName()</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptTable.html#getQualifiedName--">RelOptTable</a></code></span></div>
<div class="block">Obtains an identifier for this table. The identifier must be unique with
respect to the Connection producing this table.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../org/apache/calcite/plan/RelOptTable.html#getQualifiedName--">getQualifiedName</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptTable.html" title="org.apache.calcite.plan中的接口">RelOptTable</a></code></dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>qualified name</dd>
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<h4>getRowCount</h4>
<pre>public&nbsp;double&nbsp;getRowCount()</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptTable.html#getRowCount--">RelOptTable</a></code></span></div>
<div class="block">Returns an estimate of the number of rows in the table.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../org/apache/calcite/plan/RelOptTable.html#getRowCount--">getRowCount</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptTable.html" title="org.apache.calcite.plan中的接口">RelOptTable</a></code></dd>
</dl>
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<h4>getRowType</h4>
<pre>public&nbsp;<a href="../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;getRowType()</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptTable.html#getRowType--">RelOptTable</a></code></span></div>
<div class="block">Describes the type of rows returned by this table.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../org/apache/calcite/plan/RelOptTable.html#getRowType--">getRowType</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptTable.html" title="org.apache.calcite.plan中的接口">RelOptTable</a></code></dd>
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<h4>getRelOptSchema</h4>
<pre>public&nbsp;<a href="../../../../org/apache/calcite/plan/RelOptSchema.html" title="org.apache.calcite.plan中的接口">RelOptSchema</a>&nbsp;getRelOptSchema()</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptTable.html#getRelOptSchema--">RelOptTable</a></code></span></div>
<div class="block">Returns the <a href="../../../../org/apache/calcite/plan/RelOptSchema.html" title="org.apache.calcite.plan中的接口"><code>RelOptSchema</code></a> this table belongs to.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../org/apache/calcite/plan/RelOptTable.html#getRelOptSchema--">getRelOptSchema</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptTable.html" title="org.apache.calcite.plan中的接口">RelOptTable</a></code></dd>
</dl>
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<h4>getCollationList</h4>
<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="java.util中的类或接口">List</a>&lt;<a href="../../../../org/apache/calcite/rel/RelCollation.html" title="org.apache.calcite.rel中的接口">RelCollation</a>&gt;&nbsp;getCollationList()</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptTable.html#getCollationList--">RelOptTable</a></code></span></div>
<div class="block">Returns a description of the physical ordering (or orderings) of the rows
returned from this table.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../org/apache/calcite/plan/RelOptTable.html#getCollationList--">getCollationList</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptTable.html" title="org.apache.calcite.plan中的接口">RelOptTable</a></code></dd>
<dt><span class="seeLabel">另请参阅:</span></dt>
<dd><a href="../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#collations-org.apache.calcite.rel.RelNode-"><code>RelMetadataQuery.collations(RelNode)</code></a></dd>
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<h4>getDistribution</h4>
<pre>public&nbsp;<a href="../../../../org/apache/calcite/rel/RelDistribution.html" title="org.apache.calcite.rel中的接口">RelDistribution</a>&nbsp;getDistribution()</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptTable.html#getDistribution--">RelOptTable</a></code></span></div>
<div class="block">Returns a description of the physical distribution of the rows
in this table.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../org/apache/calcite/plan/RelOptTable.html#getDistribution--">getDistribution</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptTable.html" title="org.apache.calcite.plan中的接口">RelOptTable</a></code></dd>
<dt><span class="seeLabel">另请参阅:</span></dt>
<dd><a href="../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#distribution-org.apache.calcite.rel.RelNode-"><code>RelMetadataQuery.distribution(RelNode)</code></a></dd>
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<h4>unwrap</h4>
<pre>public&nbsp;&lt;T&gt;&nbsp;T&nbsp;unwrap(<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>&lt;T&gt;&nbsp;clazz)</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../org/apache/calcite/schema/Wrapper.html#unwrap-java.lang.Class-">Wrapper</a></code></span></div>
<div class="block">Finds an instance of an interface implemented by this object,
or returns null if this object does not support that interface.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../org/apache/calcite/schema/Wrapper.html#unwrap-java.lang.Class-">unwrap</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../org/apache/calcite/schema/Wrapper.html" title="org.apache.calcite.schema中的接口">Wrapper</a></code></dd>
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<h4>isKey</h4>
<pre>public&nbsp;boolean&nbsp;isKey(<a href="../../../../org/apache/calcite/util/ImmutableBitSet.html" title="org.apache.calcite.util中的类">ImmutableBitSet</a>&nbsp;columns)</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptTable.html#isKey-org.apache.calcite.util.ImmutableBitSet-">RelOptTable</a></code></span></div>
<div class="block">Returns whether the given columns are a key or a superset of a unique key
of this table.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../org/apache/calcite/plan/RelOptTable.html#isKey-org.apache.calcite.util.ImmutableBitSet-">isKey</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptTable.html" title="org.apache.calcite.plan中的接口">RelOptTable</a></code></dd>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>columns</code> - Ordinals of key columns</dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>Whether the given columns are a key or a superset of a key</dd>
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<h4>getKeys</h4>
<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="java.util中的类或接口">List</a>&lt;<a href="../../../../org/apache/calcite/util/ImmutableBitSet.html" title="org.apache.calcite.util中的类">ImmutableBitSet</a>&gt;&nbsp;getKeys()</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptTable.html#getKeys--">RelOptTable</a></code></span></div>
<div class="block">Returns a list of unique keys, empty list if no key exist,
the result should be consistent with <code>isKey</code></div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../org/apache/calcite/plan/RelOptTable.html#getKeys--">getKeys</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptTable.html" title="org.apache.calcite.plan中的接口">RelOptTable</a></code></dd>
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<h4>getReferentialConstraints</h4>
<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="java.util中的类或接口">List</a>&lt;<a href="../../../../org/apache/calcite/rel/RelReferentialConstraint.html" title="org.apache.calcite.rel中的接口">RelReferentialConstraint</a>&gt;&nbsp;getReferentialConstraints()</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptTable.html#getReferentialConstraints--">RelOptTable</a></code></span></div>
<div class="block">Returns the referential constraints existing for this table. These constraints
are represented over other tables using <a href="../../../../org/apache/calcite/rel/RelReferentialConstraint.html" title="org.apache.calcite.rel中的接口"><code>RelReferentialConstraint</code></a> nodes.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../org/apache/calcite/plan/RelOptTable.html#getReferentialConstraints--">getReferentialConstraints</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptTable.html" title="org.apache.calcite.plan中的接口">RelOptTable</a></code></dd>
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<h4>toRel</h4>
<pre>public&nbsp;<a href="../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a>&nbsp;toRel(<a href="../../../../org/apache/calcite/plan/RelOptTable.ToRelContext.html" title="org.apache.calcite.plan中的接口">RelOptTable.ToRelContext</a>&nbsp;context)</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptTable.html#toRel-org.apache.calcite.plan.RelOptTable.ToRelContext-">RelOptTable</a></code></span></div>
<div class="block">Converts this table into a <a href="../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口"><code>relational expression</code></a>.
<p>The <a href="../../../../org/apache/calcite/plan/RelOptPlanner.html" title="org.apache.calcite.plan中的接口"><code>planner</code></a> calls this
method to convert a table into an initial relational expression,
generally something abstract, such as a
<a href="../../../../org/apache/calcite/rel/logical/LogicalTableScan.html" title="org.apache.calcite.rel.logical中的类"><code>LogicalTableScan</code></a>,
then optimizes this expression by
applying <a href="../../../../org/apache/calcite/plan/RelOptRule.html" title="org.apache.calcite.plan中的类"><code>rules</code></a> to transform it
into more efficient access methods for this table.</p></div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../org/apache/calcite/plan/RelOptTable.html#toRel-org.apache.calcite.plan.RelOptTable.ToRelContext-">toRel</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptTable.html" title="org.apache.calcite.plan中的接口">RelOptTable</a></code></dd>
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<h4>getExpression</h4>
<pre>public&nbsp;<a href="../../../../org/apache/calcite/linq4j/tree/Expression.html" title="org.apache.calcite.linq4j.tree中的类">Expression</a>&nbsp;getExpression(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="java.lang中的类或接口">Class</a>&nbsp;clazz)</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptTable.html#getExpression-java.lang.Class-">RelOptTable</a></code></span></div>
<div class="block">Generates code for this table.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../org/apache/calcite/plan/RelOptTable.html#getExpression-java.lang.Class-">getExpression</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptTable.html" title="org.apache.calcite.plan中的接口">RelOptTable</a></code></dd>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>clazz</code> - The desired collection class; for example <code>Queryable</code>.</dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>the code for the table, or null if code generation is not supported</dd>
</dl>
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<h4>extend</h4>
<pre>public&nbsp;<a href="../../../../org/apache/calcite/plan/RelOptTable.html" title="org.apache.calcite.plan中的接口">RelOptTable</a>&nbsp;extend(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="java.util中的类或接口">List</a>&lt;<a href="../../../../org/apache/calcite/rel/type/RelDataTypeField.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeField</a>&gt;&nbsp;extendedFields)</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptTable.html#extend-java.util.List-">RelOptTable</a></code></span></div>
<div class="block">Returns a table with the given extra fields.
<p>The extended table includes the fields of this base table plus the
extended fields that do not have the same name as a field in the base
table.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../org/apache/calcite/plan/RelOptTable.html#extend-java.util.List-">extend</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptTable.html" title="org.apache.calcite.plan中的接口">RelOptTable</a></code></dd>
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<h4>getColumnStrategies</h4>
<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="java.util中的类或接口">List</a>&lt;<a href="../../../../org/apache/calcite/schema/ColumnStrategy.html" title="org.apache.calcite.schema中的枚举">ColumnStrategy</a>&gt;&nbsp;getColumnStrategies()</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptTable.html#getColumnStrategies--">RelOptTable</a></code></span></div>
<div class="block">Returns a list describing how each column is populated. The list has the
same number of entries as there are fields, and is immutable.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../org/apache/calcite/plan/RelOptTable.html#getColumnStrategies--">getColumnStrategies</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../org/apache/calcite/plan/RelOptTable.html" title="org.apache.calcite.plan中的接口">RelOptTable</a></code></dd>
</dl>
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