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<h1 title="Uses of Package org.apache.calcite.linq4j.function" class="title">Uses of Package<br>org.apache.calcite.linq4j.function</h1>
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<table class="useSummary">
<caption><span>Packages that use <a href="package-summary.html">org.apache.calcite.linq4j.function</a></span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Package</th>
<th class="colLast" scope="col">Description</th>
</tr>
<tbody>
<tr class="altColor">
<th class="colFirst" scope="row"><a href="#org.apache.calcite.adapter.druid">org.apache.calcite.adapter.druid</a></th>
<td class="colLast">
<div class="block">Query provider based on a Druid database.</div>
</td>
</tr>
<tr class="rowColor">
<th class="colFirst" scope="row"><a href="#org.apache.calcite.adapter.elasticsearch">org.apache.calcite.adapter.elasticsearch</a></th>
<td class="colLast">
<div class="block">Query provider based on an Elasticsearch2 DB.</div>
</td>
</tr>
<tr class="altColor">
<th class="colFirst" scope="row"><a href="#org.apache.calcite.adapter.enumerable">org.apache.calcite.adapter.enumerable</a></th>
<td class="colLast">
<div class="block">Query optimizer rules for Java calling convention.</div>
</td>
</tr>
<tr class="rowColor">
<th class="colFirst" scope="row"><a href="#org.apache.calcite.adapter.java">org.apache.calcite.adapter.java</a></th>
<td class="colLast">
<div class="block">Query provider based on Java in-memory data
structures.</div>
</td>
</tr>
<tr class="altColor">
<th class="colFirst" scope="row"><a href="#org.apache.calcite.adapter.jdbc">org.apache.calcite.adapter.jdbc</a></th>
<td class="colLast">
<div class="block">Query provider based on a JDBC data source.</div>
</td>
</tr>
<tr class="rowColor">
<th class="colFirst" scope="row"><a href="#org.apache.calcite.adapter.mongodb">org.apache.calcite.adapter.mongodb</a></th>
<td class="colLast">
<div class="block">Query provider based on a MongoDB database.</div>
</td>
</tr>
<tr class="altColor">
<th class="colFirst" scope="row"><a href="#org.apache.calcite.adapter.spark">org.apache.calcite.adapter.spark</a></th>
<td class="colLast">
<div class="block">Adapter based on the Apache Spark data management system.</div>
</td>
</tr>
<tr class="rowColor">
<th class="colFirst" scope="row"><a href="#org.apache.calcite.jdbc">org.apache.calcite.jdbc</a></th>
<td class="colLast">
<div class="block">JDBC driver for Calcite.</div>
</td>
</tr>
<tr class="altColor">
<th class="colFirst" scope="row"><a href="#org.apache.calcite.linq4j">org.apache.calcite.linq4j</a></th>
<td class="colLast">
<div class="block">Language-integrated query for Java (linq4j) main package.</div>
</td>
</tr>
<tr class="rowColor">
<th class="colFirst" scope="row"><a href="#org.apache.calcite.linq4j.function">org.apache.calcite.linq4j.function</a></th>
<td class="colLast">
<div class="block">Contains definitions of functions and predicates.</div>
</td>
</tr>
<tr class="altColor">
<th class="colFirst" scope="row"><a href="#org.apache.calcite.linq4j.tree">org.apache.calcite.linq4j.tree</a></th>
<td class="colLast">
<div class="block">Object model for Java expressions.</div>
</td>
</tr>
<tr class="rowColor">
<th class="colFirst" scope="row"><a href="#org.apache.calcite.plan">org.apache.calcite.plan</a></th>
<td class="colLast">
<div class="block">Defines interfaces for constructing rule-based optimizers of
relational expressions.</div>
</td>
</tr>
<tr class="altColor">
<th class="colFirst" scope="row"><a href="#org.apache.calcite.plan.hep">org.apache.calcite.plan.hep</a></th>
<td class="colLast">
<div class="block">Provides a heuristic planner implementation for the interfaces in
<a href="../../plan/package-summary.html"><code>org.apache.calcite.plan</code></a>.</div>
</td>
</tr>
<tr class="rowColor">
<th class="colFirst" scope="row"><a href="#org.apache.calcite.prepare">org.apache.calcite.prepare</a></th>
<td class="colLast">
<div class="block">Preparation of queries (parsing, planning and implementation).</div>
</td>
</tr>
<tr class="altColor">
<th class="colFirst" scope="row"><a href="#org.apache.calcite.rel.core">org.apache.calcite.rel.core</a></th>
<td class="colLast">
<div class="block">Defines core relational expressions.</div>
</td>
</tr>
<tr class="rowColor">
<th class="colFirst" scope="row"><a href="#org.apache.calcite.rel.logical">org.apache.calcite.rel.logical</a></th>
<td class="colLast">
<div class="block">Defines logical relational expressions.</div>
</td>
</tr>
<tr class="altColor">
<th class="colFirst" scope="row"><a href="#org.apache.calcite.rel.type">org.apache.calcite.rel.type</a></th>
<td class="colLast">
<div class="block">Defines a type system for relational expressions.</div>
</td>
</tr>
<tr class="rowColor">
<th class="colFirst" scope="row"><a href="#org.apache.calcite.rex">org.apache.calcite.rex</a></th>
<td class="colLast">
<div class="block">Provides a language for representing row-expressions.</div>
</td>
</tr>
<tr class="altColor">
<th class="colFirst" scope="row"><a href="#org.apache.calcite.runtime">org.apache.calcite.runtime</a></th>
<td class="colLast">
<div class="block">Utilities required at runtime.</div>
</td>
</tr>
<tr class="rowColor">
<th class="colFirst" scope="row"><a href="#org.apache.calcite.schema">org.apache.calcite.schema</a></th>
<td class="colLast">
<div class="block">Schema SPI.</div>
</td>
</tr>
<tr class="altColor">
<th class="colFirst" scope="row"><a href="#org.apache.calcite.schema.impl">org.apache.calcite.schema.impl</a></th>
<td class="colLast">
<div class="block">Utilities to help implement Calcite's SPIs.</div>
</td>
</tr>
<tr class="rowColor">
<th class="colFirst" scope="row"><a href="#org.apache.calcite.sql">org.apache.calcite.sql</a></th>
<td class="colLast">
<div class="block">Provides a SQL parser and object model.</div>
</td>
</tr>
<tr class="altColor">
<th class="colFirst" scope="row"><a href="#org.apache.calcite.sql.validate">org.apache.calcite.sql.validate</a></th>
<td class="colLast">
<div class="block">SQL validation.</div>
</td>
</tr>
<tr class="rowColor">
<th class="colFirst" scope="row"><a href="#org.apache.calcite.sql2rel">org.apache.calcite.sql2rel</a></th>
<td class="colLast">
<div class="block">Translates a SQL parse tree to relational expression.</div>
</td>
</tr>
<tr class="altColor">
<th class="colFirst" scope="row"><a href="#org.apache.calcite.tools">org.apache.calcite.tools</a></th>
<td class="colLast">
<div class="block">Provides utility classes.</div>
</td>
</tr>
<tr class="rowColor">
<th class="colFirst" scope="row"><a href="#org.apache.calcite.util">org.apache.calcite.util</a></th>
<td class="colLast">
<div class="block">Provides utility classes.</div>
</td>
</tr>
<tr class="altColor">
<th class="colFirst" scope="row"><a href="#org.apache.calcite.util.trace">org.apache.calcite.util.trace</a></th>
<td class="colLast">
<div class="block">Tracing services.</div>
</td>
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<th class="colFirst" scope="col">Class</th>
<th class="colLast" scope="col">Description</th>
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<th class="colFirst" scope="row"><a href="class-use/Function.html#org.apache.calcite.adapter.druid">Function</a></th>
<td class="colLast">
<div class="block">Base interface for all functions.</div>
</td>
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<tr class="rowColor">
<th class="colFirst" scope="row"><a href="class-use/Function1.html#org.apache.calcite.adapter.druid">Function1</a></th>
<td class="colLast">
<div class="block">Function with one parameter.</div>
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<th class="colFirst" scope="row"><a href="class-use/Function1.html#org.apache.calcite.adapter.elasticsearch">Function1</a></th>
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<div class="block">Function with one parameter.</div>
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<th class="colFirst" scope="row"><a href="class-use/Experimental.html#org.apache.calcite.adapter.enumerable">Experimental</a></th>
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<div class="block">Annotation that indicates that a class, interface, field or method
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<th class="colFirst" scope="row"><a href="class-use/Function.html#org.apache.calcite.adapter.enumerable">Function</a></th>
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<div class="block">Base interface for all functions.</div>
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<th class="colFirst" scope="row"><a href="class-use/Function0.html#org.apache.calcite.adapter.enumerable">Function0</a></th>
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<div class="block">Function with no parameters.</div>
</td>
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<tr class="rowColor">
<th class="colFirst" scope="row"><a href="class-use/Function1.html#org.apache.calcite.adapter.enumerable">Function1</a></th>
<td class="colLast">
<div class="block">Function with one parameter.</div>
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<th class="colFirst" scope="row"><a href="class-use/Function2.html#org.apache.calcite.adapter.enumerable">Function2</a></th>
<td class="colLast">
<div class="block">Function with two parameters.</div>
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<th class="colFirst" scope="row"><a href="class-use/Function.html#org.apache.calcite.adapter.java">Function</a></th>
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<div class="block">Base interface for all functions.</div>
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<th class="colFirst" scope="row"><a href="class-use/Function1.html#org.apache.calcite.adapter.java">Function1</a></th>
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<th class="colFirst" scope="row"><a href="class-use/Experimental.html#org.apache.calcite.adapter.jdbc">Experimental</a></th>
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<th class="colFirst" scope="row"><a href="class-use/Function.html#org.apache.calcite.adapter.jdbc">Function</a></th>
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<th class="colFirst" scope="row"><a href="class-use/Function0.html#org.apache.calcite.adapter.jdbc">Function0</a></th>
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<div class="block">Base interface for all functions.</div>
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<th class="colFirst" scope="row"><a href="class-use/BigDecimalFunction1.html#org.apache.calcite.linq4j">BigDecimalFunction1</a></th>
<td class="colLast">
<div class="block">Function that takes one parameter and returns a <code>BigDecimal</code> value.</div>
</td>
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<th class="colFirst" scope="row"><a href="class-use/DoubleFunction1.html#org.apache.calcite.linq4j">DoubleFunction1</a></th>
<td class="colLast">
<div class="block">Function that takes one parameter and returns a native <code>double</code> value.</div>
</td>
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<th class="colFirst" scope="row"><a href="class-use/EqualityComparer.html#org.apache.calcite.linq4j">EqualityComparer</a></th>
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<div class="block">Compares values for equality.</div>
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<th class="colFirst" scope="row"><a href="class-use/FloatFunction1.html#org.apache.calcite.linq4j">FloatFunction1</a></th>
<td class="colLast">
<div class="block">Function that takes one parameter and returns a native <code>float</code> value.</div>
</td>
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<th class="colFirst" scope="row"><a href="class-use/Function0.html#org.apache.calcite.linq4j">Function0</a></th>
<td class="colLast">
<div class="block">Function with no parameters.</div>
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<th class="colFirst" scope="row"><a href="class-use/Function1.html#org.apache.calcite.linq4j">Function1</a></th>
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<div class="block">Function with one parameter.</div>
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<th class="colFirst" scope="row"><a href="class-use/Function2.html#org.apache.calcite.linq4j">Function2</a></th>
<td class="colLast">
<div class="block">Function with two parameters.</div>
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<th class="colFirst" scope="row"><a href="class-use/IntegerFunction1.html#org.apache.calcite.linq4j">IntegerFunction1</a></th>
<td class="colLast">
<div class="block">Function that takes one parameter and returns a native <code>int</code> value.</div>
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<th class="colFirst" scope="row"><a href="class-use/LongFunction1.html#org.apache.calcite.linq4j">LongFunction1</a></th>
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<div class="block">Function that takes one parameter and returns a native <code>long</code> value.</div>
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<th class="colFirst" scope="row"><a href="class-use/NullableBigDecimalFunction1.html#org.apache.calcite.linq4j">NullableBigDecimalFunction1</a></th>
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<div class="block">Function that takes one parameter and returns a <code>BigDecimal</code> value that
may be null.</div>
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