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| <h2 title="Class Expression" class="title">Class Expression</h2> |
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| <ul class="inheritance"> |
| <li>java.lang.Object</li> |
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| <li><a href="AbstractNode.html" title="class in org.apache.calcite.linq4j.tree">org.apache.calcite.linq4j.tree.AbstractNode</a></li> |
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| <ul class="inheritance"> |
| <li>org.apache.calcite.linq4j.tree.Expression</li> |
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| <dd><code><a href="Node.html" title="interface in org.apache.calcite.linq4j.tree">Node</a></code></dd> |
| </dl> |
| <dl> |
| <dt>Direct Known Subclasses:</dt> |
| <dd><code><a href="BinaryExpression.html" title="class in org.apache.calcite.linq4j.tree">BinaryExpression</a></code>, <code><a href="ConstantExpression.html" title="class in org.apache.calcite.linq4j.tree">ConstantExpression</a></code>, <code><a href="DefaultExpression.html" title="class in org.apache.calcite.linq4j.tree">DefaultExpression</a></code>, <code><a href="DynamicExpression.html" title="class in org.apache.calcite.linq4j.tree">DynamicExpression</a></code>, <code><a href="IndexExpression.html" title="class in org.apache.calcite.linq4j.tree">IndexExpression</a></code>, <code><a href="InvocationExpression.html" title="class in org.apache.calcite.linq4j.tree">InvocationExpression</a></code>, <code><a href="LambdaExpression.html" title="class in org.apache.calcite.linq4j.tree">LambdaExpression</a></code>, <code><a href="ListInitExpression.html" title="class in org.apache.calcite.linq4j.tree">ListInitExpression</a></code>, <code><a href="MemberExpression.html" title="class in org.apache.calcite.linq4j.tree">MemberExpression</a></code>, <code><a href="MemberInitExpression.html" title="class in org.apache.calcite.linq4j.tree">MemberInitExpression</a></code>, <code><a href="MethodCallExpression.html" title="class in org.apache.calcite.linq4j.tree">MethodCallExpression</a></code>, <code><a href="NewArrayExpression.html" title="class in org.apache.calcite.linq4j.tree">NewArrayExpression</a></code>, <code><a href="NewExpression.html" title="class in org.apache.calcite.linq4j.tree">NewExpression</a></code>, <code><a href="ParameterExpression.html" title="class in org.apache.calcite.linq4j.tree">ParameterExpression</a></code>, <code><a href="TernaryExpression.html" title="class in org.apache.calcite.linq4j.tree">TernaryExpression</a></code>, <code><a href="TypeBinaryExpression.html" title="class in org.apache.calcite.linq4j.tree">TypeBinaryExpression</a></code>, <code><a href="UnaryExpression.html" title="class in org.apache.calcite.linq4j.tree">UnaryExpression</a></code></dd> |
| </dl> |
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| <pre>public abstract class <span class="typeNameLabel">Expression</span> |
| extends <a href="AbstractNode.html" title="class in org.apache.calcite.linq4j.tree">AbstractNode</a></pre> |
| <div class="block"><p>Analogous to LINQ's System.Linq.Expression.</p></div> |
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| <h3>Fields inherited from class org.apache.calcite.linq4j.tree.<a href="AbstractNode.html" title="class in org.apache.calcite.linq4j.tree">AbstractNode</a></h3> |
| <code><a href="AbstractNode.html#nodeType">nodeType</a>, <a href="AbstractNode.html#type">type</a></code></li> |
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| <tr> |
| <th class="colFirst" scope="col">Constructor</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| <tr class="altColor"> |
| <th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(org.apache.calcite.linq4j.tree.ExpressionType,java.lang.reflect.Type)">Expression</a></span>​(<a href="ExpressionType.html" title="enum in org.apache.calcite.linq4j.tree">ExpressionType</a> nodeType, |
| java.lang.reflect.Type type)</code></th> |
| <td class="colLast"> |
| <div class="block">Creates an Expression.</div> |
| </td> |
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| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
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| <td class="colFirst"><code>abstract <a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#accept(org.apache.calcite.linq4j.tree.Shuttle)">accept</a></span>​(<a href="Shuttle.html" title="class in org.apache.calcite.linq4j.tree">Shuttle</a> shuttle)</code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#canReduce()">canReduce</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">Indicates that the node can be reduced to a simpler node.</div> |
| </td> |
| </tr> |
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| <h3>Methods inherited from class org.apache.calcite.linq4j.tree.<a href="AbstractNode.html" title="class in org.apache.calcite.linq4j.tree">AbstractNode</a></h3> |
| <code><a href="AbstractNode.html#accept(org.apache.calcite.linq4j.tree.ExpressionWriter)">accept</a>, <a href="AbstractNode.html#accept(org.apache.calcite.linq4j.tree.ExpressionWriter,int,int)">accept</a>, <a href="AbstractNode.html#accept0(org.apache.calcite.linq4j.tree.ExpressionWriter)">accept0</a>, <a href="AbstractNode.html#equals(java.lang.Object)">equals</a>, <a href="AbstractNode.html#evaluate(org.apache.calcite.linq4j.tree.Evaluator)">evaluate</a>, <a href="AbstractNode.html#getNodeType()">getNodeType</a>, <a href="AbstractNode.html#getType()">getType</a>, <a href="AbstractNode.html#hashCode()">hashCode</a>, <a href="AbstractNode.html#toString()">toString</a></code></li> |
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| <h3>Methods inherited from class java.lang.Object</h3> |
| <code>clone, finalize, getClass, notify, notifyAll, wait, wait, wait</code></li> |
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| <h3>Methods inherited from interface org.apache.calcite.linq4j.tree.<a href="Node.html" title="interface in org.apache.calcite.linq4j.tree">Node</a></h3> |
| <code><a href="Node.html#accept(org.apache.calcite.linq4j.tree.Visitor)">accept</a></code></li> |
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| <h4>Expression</h4> |
| <pre>public Expression​(<a href="ExpressionType.html" title="enum in org.apache.calcite.linq4j.tree">ExpressionType</a> nodeType, |
| java.lang.reflect.Type type)</pre> |
| <div class="block">Creates an Expression. |
| |
| <p>The type of the expression may, at the caller's discretion, be a |
| regular class (because <code>Class</code> implements <code>Type</code>) or it may |
| be a different implementation that retains information about type |
| parameters.</p></div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>nodeType</code> - Node type</dd> |
| <dd><code>type</code> - Type of the expression</dd> |
| </dl> |
| </li> |
| </ul> |
| </li> |
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| <h4>accept</h4> |
| <pre class="methodSignature">public abstract <a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a> accept​(<a href="Shuttle.html" title="class in org.apache.calcite.linq4j.tree">Shuttle</a> shuttle)</pre> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="Node.html#accept(org.apache.calcite.linq4j.tree.Shuttle)">accept</a></code> in interface <code><a href="Node.html" title="interface in org.apache.calcite.linq4j.tree">Node</a></code></dd> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="AbstractNode.html#accept(org.apache.calcite.linq4j.tree.Shuttle)">accept</a></code> in class <code><a href="AbstractNode.html" title="class in org.apache.calcite.linq4j.tree">AbstractNode</a></code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="canReduce()"> |
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| <h4>canReduce</h4> |
| <pre class="methodSignature">public boolean canReduce()</pre> |
| <div class="block">Indicates that the node can be reduced to a simpler node. If this |
| returns true, Reduce() can be called to produce the reduced form.</div> |
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