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| <div class="subTitle"><span class="packageLabelInType">Package</span> <a href="package-summary.html">org.apache.calcite.schema.impl</a></div> |
| <h2 title="Class AggregateFunctionImpl" class="title">Class AggregateFunctionImpl</h2> |
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| <ul class="inheritance"> |
| <li>java.lang.Object</li> |
| <li> |
| <ul class="inheritance"> |
| <li>org.apache.calcite.schema.impl.AggregateFunctionImpl</li> |
| </ul> |
| </li> |
| </ul> |
| <div class="description"> |
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| <dl> |
| <dt>All Implemented Interfaces:</dt> |
| <dd><code><a href="../AggregateFunction.html" title="interface in org.apache.calcite.schema">AggregateFunction</a></code>, <code><a href="../Function.html" title="interface in org.apache.calcite.schema">Function</a></code>, <code><a href="../ImplementableAggFunction.html" title="interface in org.apache.calcite.schema">ImplementableAggFunction</a></code></dd> |
| </dl> |
| <hr> |
| <pre>public class <span class="typeNameLabel">AggregateFunctionImpl</span> |
| extends java.lang.Object |
| implements <a href="../AggregateFunction.html" title="interface in org.apache.calcite.schema">AggregateFunction</a>, <a href="../ImplementableAggFunction.html" title="interface in org.apache.calcite.schema">ImplementableAggFunction</a></pre> |
| <div class="block">Implementation of <a href="../AggregateFunction.html" title="interface in org.apache.calcite.schema"><code>AggregateFunction</code></a> via user-defined class. |
| The class should implement <code>A init()</code>, <code>A add(A, V)</code>, and |
| <code>R result(A)</code> methods. |
| All the methods should be either static or instance. |
| Bonus point: when using non-static implementation, the aggregate object is |
| reused through the calculation, thus it can have aggregation-related state.</div> |
| </li> |
| </ul> |
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| <!-- =========== FIELD SUMMARY =========== --> |
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| <h3>Field Summary</h3> |
| <table class="memberSummary"> |
| <caption><span>Fields</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colSecond" scope="col">Field</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>java.lang.Class<?></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#accumulatorType">accumulatorType</a></span></code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>java.lang.reflect.Method</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#addMethod">addMethod</a></span></code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>java.lang.Class<?></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#declaringClass">declaringClass</a></span></code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>java.lang.reflect.Method</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#initMethod">initMethod</a></span></code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isStatic">isStatic</a></span></code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>java.lang.reflect.Method</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#mergeMethod">mergeMethod</a></span></code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private java.util.List<<a href="../FunctionParameter.html" title="interface in org.apache.calcite.schema">FunctionParameter</a>></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#parameters">parameters</a></span></code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>java.lang.reflect.Method</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#resultMethod">resultMethod</a></span></code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>java.lang.Class<?></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#resultType">resultType</a></span></code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>com.google.common.collect.ImmutableList<java.lang.Class<?>></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#valueTypes">valueTypes</a></span></code></th> |
| <td class="colLast"> </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| </section> |
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| <h3>Constructor Summary</h3> |
| <table class="memberSummary"> |
| <caption><span>Constructors</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier</th> |
| <th class="colSecond" scope="col">Constructor</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private </code></td> |
| <th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(java.lang.Class,java.util.List,java.util.List,java.lang.Class,java.lang.Class,java.lang.reflect.Method,java.lang.reflect.Method,java.lang.reflect.Method,java.lang.reflect.Method)">AggregateFunctionImpl</a></span>​(java.lang.Class<?> declaringClass, |
| java.util.List<<a href="../FunctionParameter.html" title="interface in org.apache.calcite.schema">FunctionParameter</a>> params, |
| java.util.List<java.lang.Class<?>> valueTypes, |
| java.lang.Class<?> accumulatorType, |
| java.lang.Class<?> resultType, |
| java.lang.reflect.Method initMethod, |
| java.lang.reflect.Method addMethod, |
| java.lang.reflect.Method mergeMethod, |
| java.lang.reflect.Method resultMethod)</code></th> |
| <td class="colLast"> |
| <div class="block">Private constructor; use <a href="#create(java.lang.Class)"><code>create(java.lang.Class<?>)</code></a>.</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
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| </section> |
| <!-- ========== METHOD SUMMARY =========== --> |
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| <h3>Method Summary</h3> |
| <table class="memberSummary"> |
| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colSecond" scope="col">Method</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>static <a href="AggregateFunctionImpl.html" title="class in org.apache.calcite.schema.impl">AggregateFunctionImpl</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#create(java.lang.Class)">create</a></span>​(java.lang.Class<?> clazz)</code></th> |
| <td class="colLast"> |
| <div class="block">Creates an aggregate function, or returns null.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code><a href="../../adapter/enumerable/AggImplementor.html" title="interface in org.apache.calcite.adapter.enumerable">AggImplementor</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getImplementor(boolean)">getImplementor</a></span>​(boolean windowContext)</code></th> |
| <td class="colLast"> |
| <div class="block">Returns implementor that translates the function to linq4j expression.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>java.util.List<<a href="../FunctionParameter.html" title="interface in org.apache.calcite.schema">FunctionParameter</a>></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getParameters()">getParameters</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">Returns the parameters of this function.</div> |
| </td> |
| </tr> |
| <tr id="i3" 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)">getReturnType</a></span>​(<a href="../../rel/type/RelDataTypeFactory.html" title="interface in org.apache.calcite.rel.type">RelDataTypeFactory</a> 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> |
| </table> |
| <ul class="blockList"> |
| <li class="blockList"><a id="methods.inherited.from.class.java.lang.Object"> |
| <!-- --> |
| </a> |
| <h3>Methods inherited from class java.lang.Object</h3> |
| <code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li> |
| </ul> |
| </li> |
| </ul> |
| </section> |
| </li> |
| </ul> |
| </div> |
| <div class="details"> |
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| <!-- ============ FIELD DETAIL =========== --> |
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| <h4>isStatic</h4> |
| <pre>public final boolean isStatic</pre> |
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| <h4>initMethod</h4> |
| <pre>public final java.lang.reflect.Method initMethod</pre> |
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| <h4>addMethod</h4> |
| <pre>public final java.lang.reflect.Method addMethod</pre> |
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| </a> |
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| <h4>mergeMethod</h4> |
| <pre>public final java.lang.reflect.Method mergeMethod</pre> |
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| </a> |
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| <h4>resultMethod</h4> |
| <pre>public final java.lang.reflect.Method resultMethod</pre> |
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| <h4>valueTypes</h4> |
| <pre>public final com.google.common.collect.ImmutableList<java.lang.Class<?>> valueTypes</pre> |
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| <h4>parameters</h4> |
| <pre>private final java.util.List<<a href="../FunctionParameter.html" title="interface in org.apache.calcite.schema">FunctionParameter</a>> parameters</pre> |
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| </a> |
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| <h4>accumulatorType</h4> |
| <pre>public final java.lang.Class<?> accumulatorType</pre> |
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| <a id="resultType"> |
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| </a> |
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| <h4>resultType</h4> |
| <pre>public final java.lang.Class<?> resultType</pre> |
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| </a> |
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| <h4>declaringClass</h4> |
| <pre>public final java.lang.Class<?> declaringClass</pre> |
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| </li> |
| </ul> |
| </section> |
| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
| <section role="region"> |
| <ul class="blockList"> |
| <li class="blockList"><a id="constructor.detail"> |
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| </a> |
| <h3>Constructor Detail</h3> |
| <a id="<init>(java.lang.Class,java.util.List,java.util.List,java.lang.Class,java.lang.Class,java.lang.reflect.Method,java.lang.reflect.Method,java.lang.reflect.Method,java.lang.reflect.Method)"> |
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| <h4>AggregateFunctionImpl</h4> |
| <pre>private AggregateFunctionImpl​(java.lang.Class<?> declaringClass, |
| java.util.List<<a href="../FunctionParameter.html" title="interface in org.apache.calcite.schema">FunctionParameter</a>> params, |
| java.util.List<java.lang.Class<?>> valueTypes, |
| java.lang.Class<?> accumulatorType, |
| java.lang.Class<?> resultType, |
| java.lang.reflect.Method initMethod, |
| java.lang.reflect.Method addMethod, |
| java.lang.reflect.Method mergeMethod, |
| java.lang.reflect.Method resultMethod)</pre> |
| <div class="block">Private constructor; use <a href="#create(java.lang.Class)"><code>create(java.lang.Class<?>)</code></a>.</div> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </section> |
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| <section role="region"> |
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| <a id="create(java.lang.Class)"> |
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| <h4>create</h4> |
| <pre class="methodSignature">public static <a href="AggregateFunctionImpl.html" title="class in org.apache.calcite.schema.impl">AggregateFunctionImpl</a> create​(java.lang.Class<?> clazz)</pre> |
| <div class="block">Creates an aggregate function, or returns null.</div> |
| </li> |
| </ul> |
| <a id="getParameters()"> |
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| <h4>getParameters</h4> |
| <pre class="methodSignature">public java.util.List<<a href="../FunctionParameter.html" title="interface in org.apache.calcite.schema">FunctionParameter</a>> getParameters()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../Function.html#getParameters()">Function</a></code></span></div> |
| <div class="block">Returns the parameters of this function.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../Function.html#getParameters()">getParameters</a></code> in interface <code><a href="../Function.html" title="interface in org.apache.calcite.schema">Function</a></code></dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Parameters; never null</dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="getReturnType(org.apache.calcite.rel.type.RelDataTypeFactory)"> |
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| <h4>getReturnType</h4> |
| <pre class="methodSignature">public <a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> getReturnType​(<a href="../../rel/type/RelDataTypeFactory.html" title="interface in org.apache.calcite.rel.type">RelDataTypeFactory</a> typeFactory)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../AggregateFunction.html#getReturnType(org.apache.calcite.rel.type.RelDataTypeFactory)">AggregateFunction</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="../AggregateFunction.html#getReturnType(org.apache.calcite.rel.type.RelDataTypeFactory)">getReturnType</a></code> in interface <code><a href="../AggregateFunction.html" title="interface in org.apache.calcite.schema">AggregateFunction</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>typeFactory</code> - Type factory</dd> |
| </dl> |
| </li> |
| </ul> |
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| <h4>getImplementor</h4> |
| <pre class="methodSignature">public <a href="../../adapter/enumerable/AggImplementor.html" title="interface in org.apache.calcite.adapter.enumerable">AggImplementor</a> getImplementor​(boolean windowContext)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../ImplementableAggFunction.html#getImplementor(boolean)">ImplementableAggFunction</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="../ImplementableAggFunction.html#getImplementor(boolean)">getImplementor</a></code> in interface <code><a href="../ImplementableAggFunction.html" title="interface in org.apache.calcite.schema">ImplementableAggFunction</a></code></dd> |
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| <dd>implementor that translates the function to linq4j expression.</dd> |
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