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| <div class="subTitle"><span class="packageLabelInType">Package</span> <a href="package-summary.html">org.apache.calcite.schema</a></div> |
| <h2 title="Interface Function" class="title">Interface Function</h2> |
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| <dt>All Known Subinterfaces:</dt> |
| <dd><code><a href="AggregateFunction.html" title="interface in org.apache.calcite.schema">AggregateFunction</a></code>, <code><a href="ImplementableAggFunction.html" title="interface in org.apache.calcite.schema">ImplementableAggFunction</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>, <code><a href="TableFunction.html" title="interface in org.apache.calcite.schema">TableFunction</a></code>, <code><a href="TableMacro.html" title="interface in org.apache.calcite.schema">TableMacro</a></code></dd> |
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| <dd><code><a href="impl/AggregateFunctionImpl.html" title="class in org.apache.calcite.schema.impl">AggregateFunctionImpl</a></code>, <code><a href="impl/MaterializedViewTable.MaterializedViewTableMacro.html" title="class in org.apache.calcite.schema.impl">MaterializedViewTable.MaterializedViewTableMacro</a></code>, <code><a href="impl/ReflectiveFunctionBase.html" title="class in org.apache.calcite.schema.impl">ReflectiveFunctionBase</a></code>, <code><a href="../adapter/java/ReflectiveSchema.MethodTableMacro.html" title="class in org.apache.calcite.adapter.java">ReflectiveSchema.MethodTableMacro</a></code>, <code><a href="impl/ScalarFunctionImpl.html" title="class in org.apache.calcite.schema.impl">ScalarFunctionImpl</a></code>, <code><a href="../sql/advise/SqlAdvisorGetHintsFunction.html" title="class in org.apache.calcite.sql.advise">SqlAdvisorGetHintsFunction</a></code>, <code><a href="../sql/advise/SqlAdvisorGetHintsFunction2.html" title="class in org.apache.calcite.sql.advise">SqlAdvisorGetHintsFunction2</a></code>, <code><a href="impl/TableFunctionImpl.html" title="class in org.apache.calcite.schema.impl">TableFunctionImpl</a></code>, <code><a href="impl/TableMacroImpl.html" title="class in org.apache.calcite.schema.impl">TableMacroImpl</a></code>, <code><a href="impl/ViewTableMacro.html" title="class in org.apache.calcite.schema.impl">ViewTableMacro</a></code></dd> |
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| <pre>public interface <span class="typeNameLabel">Function</span></pre> |
| <div class="block">Named expression that accepts parameters and returns a result. |
| |
| <p>The application may occur at compile time (for a macro) or at run time |
| (for a regular function). The result may be a relation, and so might any of |
| the parameters.</p> |
| |
| <p>Functions are registered in a <a href="Schema.html" title="interface in org.apache.calcite.schema"><code>Schema</code></a>, and may be queried by name |
| (<a href="Schema.html#getFunctions(java.lang.String)"><code>Schema.getFunctions(String)</code></a>) then overloads resolved based on |
| parameter types.</p></div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="TableMacro.html" title="interface in org.apache.calcite.schema"><code>TableMacro</code></a>, |
| <a href="ScalarFunction.html" title="interface in org.apache.calcite.schema"><code>ScalarFunction</code></a></dd> |
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| <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> |
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| <h4>getParameters</h4> |
| <pre class="methodSignature">java.util.List<<a href="FunctionParameter.html" title="interface in org.apache.calcite.schema">FunctionParameter</a>> getParameters()</pre> |
| <div class="block">Returns the parameters of this function.</div> |
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| <dd>Parameters; never null</dd> |
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