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<div class="subTitle"><span class="packageLabelInType">Package</span>&nbsp;<a href="package-summary.html">org.apache.calcite.schema.impl</a></div>
<h2 title="Class ScalarFunctionImpl" class="title">Class ScalarFunctionImpl</h2>
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<ul class="inheritance">
<li>java.lang.Object</li>
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<li><a href="ReflectiveFunctionBase.html" title="class in org.apache.calcite.schema.impl">org.apache.calcite.schema.impl.ReflectiveFunctionBase</a></li>
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<li>org.apache.calcite.schema.impl.ScalarFunctionImpl</li>
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<dd><code><a href="../Function.html" title="interface in org.apache.calcite.schema">Function</a></code>, <code><a href="../ImplementableFunction.html" title="interface in org.apache.calcite.schema">ImplementableFunction</a></code>, <code><a href="../ScalarFunction.html" title="interface in org.apache.calcite.schema">ScalarFunction</a></code></dd>
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<pre>public class <span class="typeNameLabel">ScalarFunctionImpl</span>
extends <a href="ReflectiveFunctionBase.html" title="class in org.apache.calcite.schema.impl">ReflectiveFunctionBase</a>
implements <a href="../ScalarFunction.html" title="interface in org.apache.calcite.schema">ScalarFunction</a>, <a href="../ImplementableFunction.html" title="interface in org.apache.calcite.schema">ImplementableFunction</a></pre>
<div class="block">Implementation of <a href="../ScalarFunction.html" title="interface in org.apache.calcite.schema"><code>ScalarFunction</code></a>.</div>
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<h3>Nested classes/interfaces inherited from class&nbsp;org.apache.calcite.schema.impl.<a href="ReflectiveFunctionBase.html" title="class in org.apache.calcite.schema.impl">ReflectiveFunctionBase</a></h3>
<code><a href="ReflectiveFunctionBase.ParameterListBuilder.html" title="class in org.apache.calcite.schema.impl">ReflectiveFunctionBase.ParameterListBuilder</a></code></li>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colSecond" scope="col">Field</th>
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<td class="colFirst"><code>private <a href="../../adapter/enumerable/CallImplementor.html" title="interface in org.apache.calcite.adapter.enumerable">CallImplementor</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#implementor">implementor</a></span></code></th>
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<h3>Fields inherited from class&nbsp;org.apache.calcite.schema.impl.<a href="ReflectiveFunctionBase.html" title="class in org.apache.calcite.schema.impl">ReflectiveFunctionBase</a></h3>
<code><a href="ReflectiveFunctionBase.html#method">method</a>, <a href="ReflectiveFunctionBase.html#parameters">parameters</a></code></li>
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<td class="colFirst"><code>private </code></td>
<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(java.lang.reflect.Method,org.apache.calcite.adapter.enumerable.CallImplementor)">ScalarFunctionImpl</a></span>&#8203;(java.lang.reflect.Method&nbsp;method,
<a href="../../adapter/enumerable/CallImplementor.html" title="interface in org.apache.calcite.adapter.enumerable">CallImplementor</a>&nbsp;implementor)</code></th>
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<div class="block">Private constructor.</div>
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<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd">&nbsp;</span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colSecond" scope="col">Method</th>
<th class="colLast" scope="col">Description</th>
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<td class="colFirst"><code>static <a href="../ScalarFunction.html" title="interface in org.apache.calcite.schema">ScalarFunction</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#create(java.lang.Class,java.lang.String)">create</a></span>&#8203;(java.lang.Class&lt;?&gt;&nbsp;clazz,
java.lang.String&nbsp;methodName)</code></th>
<td class="colLast">
<div class="block">Creates <a href="../ScalarFunction.html" title="interface in org.apache.calcite.schema"><code>ScalarFunction</code></a> from given class.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>static <a href="../ScalarFunction.html" title="interface in org.apache.calcite.schema">ScalarFunction</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#create(java.lang.reflect.Method)">create</a></span>&#8203;(java.lang.reflect.Method&nbsp;method)</code></th>
<td class="colLast">
<div class="block">Creates <a href="../ScalarFunction.html" title="interface in org.apache.calcite.schema"><code>ScalarFunction</code></a> from given method.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>static com.google.common.collect.ImmutableMultimap&lt;java.lang.String,&#8203;<a href="../ScalarFunction.html" title="interface in org.apache.calcite.schema">ScalarFunction</a>&gt;</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#createAll(java.lang.Class)">createAll</a></span>&#8203;(java.lang.Class&lt;?&gt;&nbsp;clazz)</code></th>
<td class="colLast">
<div class="block">Creates <a href="../ScalarFunction.html" title="interface in org.apache.calcite.schema"><code>ScalarFunction</code></a> for each method in
a given class.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>private static <a href="../../adapter/enumerable/CallImplementor.html" title="interface in org.apache.calcite.adapter.enumerable">CallImplementor</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#createImplementor(java.lang.reflect.Method)">createImplementor</a></span>&#8203;(java.lang.reflect.Method&nbsp;method)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code><a href="../../adapter/enumerable/CallImplementor.html" title="interface in org.apache.calcite.adapter.enumerable">CallImplementor</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getImplementor()">getImplementor</a></span>()</code></th>
<td class="colLast">
<div class="block">Returns implementor that translates the function to linq4j expression.</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>private static <a href="../../adapter/enumerable/NullPolicy.html" title="enum in org.apache.calcite.adapter.enumerable">NullPolicy</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getNullPolicy(java.lang.reflect.Method)">getNullPolicy</a></span>&#8203;(java.lang.reflect.Method&nbsp;m)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code><a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getReturnType(org.apache.calcite.rel.type.RelDataTypeFactory)">getReturnType</a></span>&#8203;(<a href="../../rel/type/RelDataTypeFactory.html" title="interface in org.apache.calcite.rel.type">RelDataTypeFactory</a>&nbsp;typeFactory)</code></th>
<td class="colLast">
<div class="block">Returns the return type of this function, constructed using the given
type factory.</div>
</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code><a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getReturnType(org.apache.calcite.rel.type.RelDataTypeFactory,org.apache.calcite.sql.SqlOperatorBinding)">getReturnType</a></span>&#8203;(<a href="../../rel/type/RelDataTypeFactory.html" title="interface in org.apache.calcite.rel.type">RelDataTypeFactory</a>&nbsp;typeFactory,
<a href="../../sql/SqlOperatorBinding.html" title="class in org.apache.calcite.sql">SqlOperatorBinding</a>&nbsp;opBinding)</code></th>
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<h3>Methods inherited from class&nbsp;org.apache.calcite.schema.impl.<a href="ReflectiveFunctionBase.html" title="class in org.apache.calcite.schema.impl">ReflectiveFunctionBase</a></h3>
<code><a href="ReflectiveFunctionBase.html#builder()">builder</a>, <a href="ReflectiveFunctionBase.html#classHasPublicZeroArgsConstructor(java.lang.Class)">classHasPublicZeroArgsConstructor</a>, <a href="ReflectiveFunctionBase.html#findMethod(java.lang.Class,java.lang.String)">findMethod</a>, <a href="ReflectiveFunctionBase.html#getParameters()">getParameters</a></code></li>
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<h3>Methods inherited from class&nbsp;java.lang.Object</h3>
<code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li>
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<h3>Methods inherited from interface&nbsp;org.apache.calcite.schema.<a href="../Function.html" title="interface in org.apache.calcite.schema">Function</a></h3>
<code><a href="../Function.html#getParameters()">getParameters</a></code></li>
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<h4>implementor</h4>
<pre>private final&nbsp;<a href="../../adapter/enumerable/CallImplementor.html" title="interface in org.apache.calcite.adapter.enumerable">CallImplementor</a> implementor</pre>
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<h4>ScalarFunctionImpl</h4>
<pre>private&nbsp;ScalarFunctionImpl&#8203;(java.lang.reflect.Method&nbsp;method,
<a href="../../adapter/enumerable/CallImplementor.html" title="interface in org.apache.calcite.adapter.enumerable">CallImplementor</a>&nbsp;implementor)</pre>
<div class="block">Private constructor.</div>
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<h4>createAll</h4>
<pre class="methodSignature">public static&nbsp;com.google.common.collect.ImmutableMultimap&lt;java.lang.String,&#8203;<a href="../ScalarFunction.html" title="interface in org.apache.calcite.schema">ScalarFunction</a>&gt;&nbsp;createAll&#8203;(java.lang.Class&lt;?&gt;&nbsp;clazz)</pre>
<div class="block">Creates <a href="../ScalarFunction.html" title="interface in org.apache.calcite.schema"><code>ScalarFunction</code></a> for each method in
a given class.</div>
</li>
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<a id="create(java.lang.Class,java.lang.String)">
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<h4>create</h4>
<pre class="methodSignature">public static&nbsp;<a href="../ScalarFunction.html" title="interface in org.apache.calcite.schema">ScalarFunction</a>&nbsp;create&#8203;(java.lang.Class&lt;?&gt;&nbsp;clazz,
java.lang.String&nbsp;methodName)</pre>
<div class="block">Creates <a href="../ScalarFunction.html" title="interface in org.apache.calcite.schema"><code>ScalarFunction</code></a> from given class.
<p>If a method of the given name is not found or it does not suit,
returns <code>null</code>.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>clazz</code> - class that is used to implement the function</dd>
<dd><code>methodName</code> - Method name (typically "eval")</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>created <a href="../ScalarFunction.html" title="interface in org.apache.calcite.schema"><code>ScalarFunction</code></a> or null</dd>
</dl>
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<h4>create</h4>
<pre class="methodSignature">public static&nbsp;<a href="../ScalarFunction.html" title="interface in org.apache.calcite.schema">ScalarFunction</a>&nbsp;create&#8203;(java.lang.reflect.Method&nbsp;method)</pre>
<div class="block">Creates <a href="../ScalarFunction.html" title="interface in org.apache.calcite.schema"><code>ScalarFunction</code></a> from given method.
When <code>eval</code> method does not suit, <code>null</code> is returned.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>method</code> - method that is used to implement the function</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>created <a href="../ScalarFunction.html" title="interface in org.apache.calcite.schema"><code>ScalarFunction</code></a> or null</dd>
</dl>
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<h4>getReturnType</h4>
<pre class="methodSignature">public&nbsp;<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;getReturnType&#8203;(<a href="../../rel/type/RelDataTypeFactory.html" title="interface in org.apache.calcite.rel.type">RelDataTypeFactory</a>&nbsp;typeFactory)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../ScalarFunction.html#getReturnType(org.apache.calcite.rel.type.RelDataTypeFactory)">ScalarFunction</a></code></span></div>
<div class="block">Returns the return type of this function, constructed using the given
type factory.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../ScalarFunction.html#getReturnType(org.apache.calcite.rel.type.RelDataTypeFactory)">getReturnType</a></code>&nbsp;in interface&nbsp;<code><a href="../ScalarFunction.html" title="interface in org.apache.calcite.schema">ScalarFunction</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>typeFactory</code> - Type factory</dd>
</dl>
</li>
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<a id="getImplementor()">
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<h4>getImplementor</h4>
<pre class="methodSignature">public&nbsp;<a href="../../adapter/enumerable/CallImplementor.html" title="interface in org.apache.calcite.adapter.enumerable">CallImplementor</a>&nbsp;getImplementor()</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../ImplementableFunction.html#getImplementor()">ImplementableFunction</a></code></span></div>
<div class="block">Returns implementor that translates the function to linq4j expression.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../ImplementableFunction.html#getImplementor()">getImplementor</a></code>&nbsp;in interface&nbsp;<code><a href="../ImplementableFunction.html" title="interface in org.apache.calcite.schema">ImplementableFunction</a></code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>implementor that translates the function to linq4j expression.</dd>
</dl>
</li>
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<a id="createImplementor(java.lang.reflect.Method)">
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<h4>createImplementor</h4>
<pre class="methodSignature">private static&nbsp;<a href="../../adapter/enumerable/CallImplementor.html" title="interface in org.apache.calcite.adapter.enumerable">CallImplementor</a>&nbsp;createImplementor&#8203;(java.lang.reflect.Method&nbsp;method)</pre>
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<h4>getNullPolicy</h4>
<pre class="methodSignature">private static&nbsp;<a href="../../adapter/enumerable/NullPolicy.html" title="enum in org.apache.calcite.adapter.enumerable">NullPolicy</a>&nbsp;getNullPolicy&#8203;(java.lang.reflect.Method&nbsp;m)</pre>
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<h4>getReturnType</h4>
<pre class="methodSignature">public&nbsp;<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;getReturnType&#8203;(<a href="../../rel/type/RelDataTypeFactory.html" title="interface in org.apache.calcite.rel.type">RelDataTypeFactory</a>&nbsp;typeFactory,
<a href="../../sql/SqlOperatorBinding.html" title="class in org.apache.calcite.sql">SqlOperatorBinding</a>&nbsp;opBinding)</pre>
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