apidocs/javadocAggregate/org/apache/calcite/rex/RexNode.html - calcite-site - Git at Google

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 <div class="subTitle">org.apache.calcite.rex</div>
 <h2 title="类 RexNode" class="title">类 RexNode</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>
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 <li>org.apache.calcite.rex.RexNode</li>
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 <div class="description">
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 <li class="blockList">
 <dl>
 <dt>直接已知子类:</dt>
 <dd><a href="../../../../org/apache/calcite/rex/RexCall.html" title="org.apache.calcite.rex中的类">RexCall</a>, <a href="../../../../org/apache/calcite/rex/RexFieldAccess.html" title="org.apache.calcite.rex中的类">RexFieldAccess</a>, <a href="../../../../org/apache/calcite/rex/RexLiteral.html" title="org.apache.calcite.rex中的类">RexLiteral</a>, <a href="../../../../org/apache/calcite/rex/RexRangeRef.html" title="org.apache.calcite.rex中的类">RexRangeRef</a>, <a href="../../../../org/apache/calcite/rex/RexVariable.html" title="org.apache.calcite.rex中的类">RexVariable</a></dd>
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 <pre>public abstract class <span class="typeNameLabel">RexNode</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></pre>
 <div class="block">Row expression.

  <p>Every row-expression has a type.
  (Compare with <a href="../../../../org/apache/calcite/sql/SqlNode.html" title="org.apache.calcite.sql中的类"><code>SqlNode</code></a>, which is created before
  validation, and therefore types may not be available.)

  <p>Some common row-expressions are: <a href="../../../../org/apache/calcite/rex/RexLiteral.html" title="org.apache.calcite.rex中的类"><code>RexLiteral</code></a> (constant value),
  <a href="../../../../org/apache/calcite/rex/RexVariable.html" title="org.apache.calcite.rex中的类"><code>RexVariable</code></a> (variable), <a href="../../../../org/apache/calcite/rex/RexCall.html" title="org.apache.calcite.rex中的类"><code>RexCall</code></a> (call to operator with
  operands). Expressions are generally created using a <a href="../../../../org/apache/calcite/rex/RexBuilder.html" title="org.apache.calcite.rex中的类"><code>RexBuilder</code></a>
  factory.</p>

  <p>All sub-classes of RexNode are immutable.</p></div>
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 <th class="colFirst" scope="col">限定符和类型</th>
 <th class="colLast" scope="col">类和说明</th>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>static interface&nbsp;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexNode.Closeable.html" title="org.apache.calcite.rex中的接口">RexNode.Closeable</a></span></code>
 <div class="block">Removes a Hook after use.</div>
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 <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/rex/RexNode.html#digest">digest</a></span></code>&nbsp;</td>
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 <tr class="altColor">
 <td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexNode.html#RexNode--">RexNode</a></span>()</code>&nbsp;</td>
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 <caption><span id="t0" class="activeTableTab"><span>所有方法</span><span class="tabEnd">&nbsp;</span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">静态方法</a></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="t3" class="tableTab"><span><a href="javascript:show(4);">抽象方法</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>
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 <th class="colFirst" scope="col">限定符和类型</th>
 <th class="colLast" scope="col">方法和说明</th>
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 <td class="colFirst"><code>abstract &lt;R,P&gt;&nbsp;R</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexNode.html#accept-org.apache.calcite.rex.RexBiVisitor-P-">accept</a></span>(<a href="../../../../org/apache/calcite/rex/RexBiVisitor.html" title="org.apache.calcite.rex中的接口">RexBiVisitor</a>&lt;R,P&gt;&nbsp;visitor,
       P&nbsp;arg)</code>
 <div class="block">Accepts a visitor with a payload, dispatching to the right overloaded
  <a href="../../../../org/apache/calcite/rex/RexBiVisitor.html#visitInputRef-org.apache.calcite.rex.RexInputRef-P-"><code>RexBiVisitor.visitInputRef(RexInputRef, Object)</code></a> visitXxx} method.</div>
 </td>
 </tr>
 <tr id="i1" class="rowColor">
 <td class="colFirst"><code>abstract &lt;R&gt;&nbsp;R</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexNode.html#accept-org.apache.calcite.rex.RexVisitor-">accept</a></span>(<a href="../../../../org/apache/calcite/rex/RexVisitor.html" title="org.apache.calcite.rex中的接口">RexVisitor</a>&lt;R&gt;&nbsp;visitor)</code>
 <div class="block">Accepts a visitor, dispatching to the right overloaded
  <a href="../../../../org/apache/calcite/rex/RexVisitor.html#visitInputRef-org.apache.calcite.rex.RexInputRef-"><code>visitXxx</code></a> method.</div>
 </td>
 </tr>
 <tr id="i2" class="altColor">
 <td class="colFirst"><code>abstract boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexNode.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>&nbsp;obj)</code>
 <div class="block">

  Every node must implement <a href="../../../../org/apache/calcite/rex/RexNode.html#equals-java.lang.Object-"><code>equals(java.lang.Object)</code></a> based on its content</div>
 </td>
 </tr>
 <tr id="i3" class="rowColor">
 <td class="colFirst"><code><a href="../../../../org/apache/calcite/sql/SqlKind.html" title="org.apache.calcite.sql中的枚举">SqlKind</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexNode.html#getKind--">getKind</a></span>()</code>
 <div class="block">Returns the kind of node this is.</div>
 </td>
 </tr>
 <tr id="i4" class="altColor">
 <td class="colFirst"><code>abstract <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/rex/RexNode.html#getType--">getType</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i5" class="rowColor">
 <td class="colFirst"><code>abstract int</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexNode.html#hashCode--">hashCode</a></span>()</code>
 <div class="block">

  Every node must implement <a href="../../../../org/apache/calcite/rex/RexNode.html#hashCode--"><code>hashCode()</code></a> consistent with
  <a href="../../../../org/apache/calcite/rex/RexNode.html#equals-java.lang.Object-"><code>equals(java.lang.Object)</code></a></div>
 </td>
 </tr>
 <tr id="i6" class="altColor">
 <td class="colFirst"><code>boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexNode.html#isA-java.util.Collection-">isA</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="java.util中的类或接口">Collection</a>&lt;<a href="../../../../org/apache/calcite/sql/SqlKind.html" title="org.apache.calcite.sql中的枚举">SqlKind</a>&gt;&nbsp;kinds)</code>&nbsp;</td>
 </tr>
 <tr id="i7" class="rowColor">
 <td class="colFirst"><code>boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexNode.html#isA-org.apache.calcite.sql.SqlKind-">isA</a></span>(<a href="../../../../org/apache/calcite/sql/SqlKind.html" title="org.apache.calcite.sql中的枚举">SqlKind</a>&nbsp;kind)</code>&nbsp;</td>
 </tr>
 <tr id="i8" class="altColor">
 <td class="colFirst"><code>boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexNode.html#isAlwaysFalse--">isAlwaysFalse</a></span>()</code>
 <div class="block">Returns whether this expression always returns false.</div>
 </td>
 </tr>
 <tr id="i9" class="rowColor">
 <td class="colFirst"><code>boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexNode.html#isAlwaysTrue--">isAlwaysTrue</a></span>()</code>
 <div class="block">Returns whether this expression always returns true.</div>
 </td>
 </tr>
 <tr id="i10" class="altColor">
 <td class="colFirst"><code>protected static boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexNode.html#needNormalize--">needNormalize</a></span>()</code>
 <div class="block">The digest of <code>RexNode</code> is normalized by default, however, sometimes a non-normalized
  representation is required.</div>
 </td>
 </tr>
 <tr id="i11" class="rowColor">
 <td class="colFirst"><code>int</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexNode.html#nodeCount--">nodeCount</a></span>()</code>
 <div class="block">Returns the number of nodes in this expression.</div>
 </td>
 </tr>
 <tr id="i12" class="altColor">
 <td class="colFirst"><code>static <a href="../../../../org/apache/calcite/rex/RexNode.Closeable.html" title="org.apache.calcite.rex中的接口">RexNode.Closeable</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexNode.html#skipNormalize--">skipNormalize</a></span>()</code>
 <div class="block">The digest of <code>RexNode</code> is normalized by default, however, sometimes a non-normalized
  representation is required.</div>
 </td>
 </tr>
 <tr id="i13" class="rowColor">
 <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/rex/RexNode.html#toString--">toString</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i14" 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/rex/RexNode.html#toStringRaw--">toStringRaw</a></span>()</code>
 <div class="block">Returns string representation of this node.</div>
 </td>
 </tr>
 <tr id="i15" class="rowColor">
 <td class="colFirst"><code>static <a href="../../../../org/apache/calcite/rex/RexNode.Closeable.html" title="org.apache.calcite.rex中的接口">RexNode.Closeable</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexNode.html#withNormalize-boolean-">withNormalize</a></span>(boolean&nbsp;needNormalize)</code>
 <div class="block">The digest of <code>RexNode</code> is normalized by default, however, sometimes a non-normalized
  representation is required.</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#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#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>
 <a name="digest">
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 <ul class="blockListLast">
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 <h4>digest</h4>
 <pre>protected&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> digest</pre>
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 <h3>构造器详细资料</h3>
 <a name="RexNode--">
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 <h4>RexNode</h4>
 <pre>public&nbsp;RexNode()</pre>
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 <h3>方法详细资料</h3>
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 <h4>withNormalize</h4>
 <pre>@API(since="1.22",
      status=EXPERIMENTAL)
 public static&nbsp;<a href="../../../../org/apache/calcite/rex/RexNode.Closeable.html" title="org.apache.calcite.rex中的接口">RexNode.Closeable</a>&nbsp;withNormalize(boolean&nbsp;needNormalize)</pre>
 <div class="block">The digest of <code>RexNode</code> is normalized by default, however, sometimes a non-normalized
  representation is required.
  This API enables to skip normalization.
  Note: the returned value must be closed, and the API is designed to be used with a
  try-with-resources.</div>
 <dl>
 <dt><span class="paramLabel">参数:</span></dt>
 <dd><code>needNormalize</code> - true if normalization should be enabled or false if it should be skipped</dd>
 <dt><span class="returnLabel">返回:</span></dt>
 <dd>a handle that should be closed to revert normalization state</dd>
 </dl>
 </li>
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 <h4>skipNormalize</h4>
 <pre>@API(since="1.22",
      status=EXPERIMENTAL)
 public static&nbsp;<a href="../../../../org/apache/calcite/rex/RexNode.Closeable.html" title="org.apache.calcite.rex中的接口">RexNode.Closeable</a>&nbsp;skipNormalize()</pre>
 <div class="block">The digest of <code>RexNode</code> is normalized by default, however, sometimes a non-normalized
  representation is required.
  This API enables to skip normalization.
  Note: the returned value must be closed, and the API is designed to be used with a
  try-with-resources.</div>
 <dl>
 <dt><span class="returnLabel">返回:</span></dt>
 <dd>a handle that should be closed to revert normalization state</dd>
 </dl>
 </li>
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 <a name="needNormalize--">
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 <h4>needNormalize</h4>
 <pre>@API(since="1.22",
      status=EXPERIMENTAL)
 protected static&nbsp;boolean&nbsp;needNormalize()</pre>
 <div class="block">The digest of <code>RexNode</code> is normalized by default, however, sometimes a non-normalized
  representation is required.
  This method enables subclasses to identify if normalization is required.</div>
 <dl>
 <dt><span class="returnLabel">返回:</span></dt>
 <dd>true if the digest needs to be normalized</dd>
 </dl>
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 <dl>
 <dt><span class="overrideSpecifyLabel">覆盖:</span></dt>
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