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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<h1 title="Package" class="title">Package&nbsp;com.amazon.carbonado.qe</h1>
<div class="docSummary">
<div class="block">Support for implementing a Query Engine.</div>
</div>
<p>See:&nbsp;<a href="#package_description">Description</a></p>
</div>
<div class="contentContainer">
<ul class="blockList">
<li class="blockList">
<table class="packageSummary" border="0" cellpadding="3" cellspacing="0" summary="Interface Summary table, listing interfaces, and an explanation">
<caption><span>Interface Summary</span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Interface</th>
<th class="colLast" scope="col">Description</th>
</tr>
<tbody>
<tr class="altColor">
<td class="colFirst"><a href="../../../../com/amazon/carbonado/qe/FullScanQueryExecutor.Support.html" title="interface in com.amazon.carbonado.qe">FullScanQueryExecutor.Support</a>&lt;S extends <a href="../../../../com/amazon/carbonado/Storable.html" title="interface in com.amazon.carbonado">Storable</a>&gt;</td>
<td class="colLast">
<div class="block">Provides support for <a href="../../../../com/amazon/carbonado/qe/FullScanQueryExecutor.html" title="class in com.amazon.carbonado.qe"><code>FullScanQueryExecutor</code></a>.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../com/amazon/carbonado/qe/IndexedQueryExecutor.Support.html" title="interface in com.amazon.carbonado.qe">IndexedQueryExecutor.Support</a>&lt;S extends <a href="../../../../com/amazon/carbonado/Storable.html" title="interface in com.amazon.carbonado">Storable</a>&gt;</td>
<td class="colLast">
<div class="block">Provides support for <a href="../../../../com/amazon/carbonado/qe/IndexedQueryExecutor.html" title="class in com.amazon.carbonado.qe"><code>IndexedQueryExecutor</code></a>.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../com/amazon/carbonado/qe/KeyQueryExecutor.Support.html" title="interface in com.amazon.carbonado.qe">KeyQueryExecutor.Support</a>&lt;S extends <a href="../../../../com/amazon/carbonado/Storable.html" title="interface in com.amazon.carbonado">Storable</a>&gt;</td>
<td class="colLast">
<div class="block">Provides support for <a href="../../../../com/amazon/carbonado/qe/KeyQueryExecutor.html" title="class in com.amazon.carbonado.qe"><code>KeyQueryExecutor</code></a>.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../com/amazon/carbonado/qe/QueryExecutor.html" title="interface in com.amazon.carbonado.qe">QueryExecutor</a>&lt;S extends <a href="../../../../com/amazon/carbonado/Storable.html" title="interface in com.amazon.carbonado">Storable</a>&gt;</td>
<td class="colLast">
<div class="block">Performs all the actual work of executing a query.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../com/amazon/carbonado/qe/QueryExecutorFactory.html" title="interface in com.amazon.carbonado.qe">QueryExecutorFactory</a>&lt;S extends <a href="../../../../com/amazon/carbonado/Storable.html" title="interface in com.amazon.carbonado">Storable</a>&gt;</td>
<td class="colLast">
<div class="block">Produces <a href="../../../../com/amazon/carbonado/qe/QueryExecutor.html" title="interface in com.amazon.carbonado.qe"><code>QueryExecutor</code></a> instances from a query specification.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../com/amazon/carbonado/qe/QueryFactory.html" title="interface in com.amazon.carbonado.qe">QueryFactory</a>&lt;S extends <a href="../../../../com/amazon/carbonado/Storable.html" title="interface in com.amazon.carbonado">Storable</a>&gt;</td>
<td class="colLast">
<div class="block">Produces <a href="../../../../com/amazon/carbonado/Query.html" title="interface in com.amazon.carbonado"><code>Query</code></a> instances from a query specification.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../com/amazon/carbonado/qe/RepositoryAccess.html" title="interface in com.amazon.carbonado.qe">RepositoryAccess</a></td>
<td class="colLast">
<div class="block">Provides internal access to a <a href="../../../../com/amazon/carbonado/Repository.html" title="interface in com.amazon.carbonado"><code>Repository</code></a>, necessary for query
 execution.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../com/amazon/carbonado/qe/SortedQueryExecutor.Support.html" title="interface in com.amazon.carbonado.qe">SortedQueryExecutor.Support</a>&lt;S extends <a href="../../../../com/amazon/carbonado/Storable.html" title="interface in com.amazon.carbonado">Storable</a>&gt;</td>
<td class="colLast">
<div class="block">Provides support for <a href="../../../../com/amazon/carbonado/qe/SortedQueryExecutor.html" title="class in com.amazon.carbonado.qe"><code>SortedQueryExecutor</code></a>.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../com/amazon/carbonado/qe/StorageAccess.html" title="interface in com.amazon.carbonado.qe">StorageAccess</a>&lt;S extends <a href="../../../../com/amazon/carbonado/Storable.html" title="interface in com.amazon.carbonado">Storable</a>&gt;</td>
<td class="colLast">
<div class="block">Provides internal access to a <a href="../../../../com/amazon/carbonado/Storage.html" title="interface in com.amazon.carbonado"><code>Storage</code></a>, necessary for query
 execution.</div>
</td>
</tr>
</tbody>
</table>
</li>
<li class="blockList">
<table class="packageSummary" border="0" cellpadding="3" cellspacing="0" summary="Class Summary table, listing classes, and an explanation">
<caption><span>Class Summary</span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Class</th>
<th class="colLast" scope="col">Description</th>
</tr>
<tbody>
<tr class="altColor">
<td class="colFirst"><a href="../../../../com/amazon/carbonado/qe/AbstractQuery.html" title="class in com.amazon.carbonado.qe">AbstractQuery</a>&lt;S extends <a href="../../../../com/amazon/carbonado/Storable.html" title="interface in com.amazon.carbonado">Storable</a>&gt;</td>
<td class="colLast">
<div class="block">AbstractQuery implements a small set of common Query methods.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../com/amazon/carbonado/qe/AbstractQueryExecutor.html" title="class in com.amazon.carbonado.qe">AbstractQueryExecutor</a>&lt;S extends <a href="../../../../com/amazon/carbonado/Storable.html" title="interface in com.amazon.carbonado">Storable</a>&gt;</td>
<td class="colLast">
<div class="block">AbstractQueryExecutor implements a small set of common QueryExecutor methods.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../com/amazon/carbonado/qe/CompositeScore.html" title="class in com.amazon.carbonado.qe">CompositeScore</a>&lt;S extends <a href="../../../../com/amazon/carbonado/Storable.html" title="interface in com.amazon.carbonado">Storable</a>&gt;</td>
<td class="colLast">
<div class="block">Evaluates an index for how well it matches a query's desired filtering and
 ordering.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../com/amazon/carbonado/qe/DelegatedQueryExecutor.html" title="class in com.amazon.carbonado.qe">DelegatedQueryExecutor</a>&lt;S extends <a href="../../../../com/amazon/carbonado/Storable.html" title="interface in com.amazon.carbonado">Storable</a>&gt;</td>
<td class="colLast">
<div class="block">QueryExecutor which delegates by executing a Query on a Storage.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../com/amazon/carbonado/qe/DelegatedQueryExecutorFactory.html" title="class in com.amazon.carbonado.qe">DelegatedQueryExecutorFactory</a>&lt;S extends <a href="../../../../com/amazon/carbonado/Storable.html" title="interface in com.amazon.carbonado">Storable</a>&gt;</td>
<td class="colLast">
<div class="block">QueryExecutorFactory which produces executors which delegate via <a href="../../../../com/amazon/carbonado/qe/DelegatedQueryExecutor.html" title="class in com.amazon.carbonado.qe"><code>DelegatedQueryExecutor</code></a>.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../com/amazon/carbonado/qe/EmptyQuery.html" title="class in com.amazon.carbonado.qe">EmptyQuery</a>&lt;S extends <a href="../../../../com/amazon/carbonado/Storable.html" title="interface in com.amazon.carbonado">Storable</a>&gt;</td>
<td class="colLast">
<div class="block">Special query implementation that fetches nothing.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../com/amazon/carbonado/qe/FilteredQueryExecutor.html" title="class in com.amazon.carbonado.qe">FilteredQueryExecutor</a>&lt;S extends <a href="../../../../com/amazon/carbonado/Storable.html" title="interface in com.amazon.carbonado">Storable</a>&gt;</td>
<td class="colLast">
<div class="block">QueryExecutor which wraps another and filters results.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../com/amazon/carbonado/qe/FilteringScore.html" title="class in com.amazon.carbonado.qe">FilteringScore</a>&lt;S extends <a href="../../../../com/amazon/carbonado/Storable.html" title="interface in com.amazon.carbonado">Storable</a>&gt;</td>
<td class="colLast">
<div class="block">Evaluates an index for how well it matches a query's desired filtering.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../com/amazon/carbonado/qe/FullScanQueryExecutor.html" title="class in com.amazon.carbonado.qe">FullScanQueryExecutor</a>&lt;S extends <a href="../../../../com/amazon/carbonado/Storable.html" title="interface in com.amazon.carbonado">Storable</a>&gt;</td>
<td class="colLast">
<div class="block">QueryExecutor which fully scans all Storables of a given type.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../com/amazon/carbonado/qe/IndexedQueryAnalyzer.html" title="class in com.amazon.carbonado.qe">IndexedQueryAnalyzer</a>&lt;S extends <a href="../../../../com/amazon/carbonado/Storable.html" title="interface in com.amazon.carbonado">Storable</a>&gt;</td>
<td class="colLast">
<div class="block">Analyzes a simple query specification and determines which index is best
 suited for its execution.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../com/amazon/carbonado/qe/IndexedQueryExecutor.html" title="class in com.amazon.carbonado.qe">IndexedQueryExecutor</a>&lt;S extends <a href="../../../../com/amazon/carbonado/Storable.html" title="interface in com.amazon.carbonado">Storable</a>&gt;</td>
<td class="colLast">
<div class="block">QueryExecutor which utilizes an index.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../com/amazon/carbonado/qe/IterableQueryExecutor.html" title="class in com.amazon.carbonado.qe">IterableQueryExecutor</a>&lt;S extends <a href="../../../../com/amazon/carbonado/Storable.html" title="interface in com.amazon.carbonado">Storable</a>&gt;</td>
<td class="colLast">
<div class="block">QueryExecutor which fully scans an iterable collection.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../com/amazon/carbonado/qe/JoinedQueryExecutor.html" title="class in com.amazon.carbonado.qe">JoinedQueryExecutor</a>&lt;S extends <a href="../../../../com/amazon/carbonado/Storable.html" title="interface in com.amazon.carbonado">Storable</a>,T extends <a href="../../../../com/amazon/carbonado/Storable.html" title="interface in com.amazon.carbonado">Storable</a>&gt;</td>
<td class="colLast">
<div class="block">QueryExecutor which joins a <i>source</i> and <i>target</i> executor,
 producing results of target type.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../com/amazon/carbonado/qe/KeyQueryExecutor.html" title="class in com.amazon.carbonado.qe">KeyQueryExecutor</a>&lt;S extends <a href="../../../../com/amazon/carbonado/Storable.html" title="interface in com.amazon.carbonado">Storable</a>&gt;</td>
<td class="colLast">
<div class="block">QueryExecutor which has a fully specified key, and so cursors produce at
 most one result.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../com/amazon/carbonado/qe/OrderingList.html" title="class in com.amazon.carbonado.qe">OrderingList</a>&lt;S extends <a href="../../../../com/amazon/carbonado/Storable.html" title="interface in com.amazon.carbonado">Storable</a>&gt;</td>
<td class="colLast">
<div class="block">Produces unmodifiable lists of <a href="../../../../com/amazon/carbonado/info/OrderedProperty.html" title="class in com.amazon.carbonado.info"><code>orderings</code></a>.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../com/amazon/carbonado/qe/OrderingScore.html" title="class in com.amazon.carbonado.qe">OrderingScore</a>&lt;S extends <a href="../../../../com/amazon/carbonado/Storable.html" title="interface in com.amazon.carbonado">Storable</a>&gt;</td>
<td class="colLast">
<div class="block">Evaluates an index for how well it matches a query's desired ordering.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../com/amazon/carbonado/qe/QueryEngine.html" title="class in com.amazon.carbonado.qe">QueryEngine</a>&lt;S extends <a href="../../../../com/amazon/carbonado/Storable.html" title="interface in com.amazon.carbonado">Storable</a>&gt;</td>
<td class="colLast">
<div class="block">Complete rule-based query engine implementation.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../com/amazon/carbonado/qe/QueryExecutorCache.html" title="class in com.amazon.carbonado.qe">QueryExecutorCache</a>&lt;S extends <a href="../../../../com/amazon/carbonado/Storable.html" title="interface in com.amazon.carbonado">Storable</a>&gt;</td>
<td class="colLast">
<div class="block">QueryExecutors should be cached since expensive analysis is often required to build
 them.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../com/amazon/carbonado/qe/QueryHints.html" title="class in com.amazon.carbonado.qe">QueryHints</a></td>
<td class="colLast">
<div class="block">An immutable map of query hints.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../com/amazon/carbonado/qe/SortedQueryExecutor.html" title="class in com.amazon.carbonado.qe">SortedQueryExecutor</a>&lt;S extends <a href="../../../../com/amazon/carbonado/Storable.html" title="interface in com.amazon.carbonado">Storable</a>&gt;</td>
<td class="colLast">
<div class="block">QueryExecutor which wraps another and sorts the results.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../com/amazon/carbonado/qe/SortedQueryExecutor.ArraySortSupport.html" title="class in com.amazon.carbonado.qe">SortedQueryExecutor.ArraySortSupport</a>&lt;S extends <a href="../../../../com/amazon/carbonado/Storable.html" title="interface in com.amazon.carbonado">Storable</a>&gt;</td>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../com/amazon/carbonado/qe/SortedQueryExecutor.MergeSortSupport.html" title="class in com.amazon.carbonado.qe">SortedQueryExecutor.MergeSortSupport</a>&lt;S extends <a href="../../../../com/amazon/carbonado/Storable.html" title="interface in com.amazon.carbonado">Storable</a>&gt;</td>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../com/amazon/carbonado/qe/StandardQuery.html" title="class in com.amazon.carbonado.qe">StandardQuery</a>&lt;S extends <a href="../../../../com/amazon/carbonado/Storable.html" title="interface in com.amazon.carbonado">Storable</a>&gt;</td>
<td class="colLast">
<div class="block">Abstract query implementation which uses a <a href="../../../../com/amazon/carbonado/qe/QueryExecutor.html" title="interface in com.amazon.carbonado.qe"><code>QueryExecutor</code></a>.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../com/amazon/carbonado/qe/StandardQueryFactory.html" title="class in com.amazon.carbonado.qe">StandardQueryFactory</a>&lt;S extends <a href="../../../../com/amazon/carbonado/Storable.html" title="interface in com.amazon.carbonado">Storable</a>&gt;</td>
<td class="colLast">
<div class="block">Builds and caches StandardQuery instances.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../com/amazon/carbonado/qe/StorableIndexSet.html" title="class in com.amazon.carbonado.qe">StorableIndexSet</a>&lt;S extends <a href="../../../../com/amazon/carbonado/Storable.html" title="interface in com.amazon.carbonado">Storable</a>&gt;</td>
<td class="colLast">
<div class="block">Manages a set of <a href="../../../../com/amazon/carbonado/info/StorableIndex.html" title="class in com.amazon.carbonado.info"><code>StorableIndex</code></a> objects, intended for reducing the
 set such that the minimal amount of physical indexes need to be defined for
 a specific type of <a href="../../../../com/amazon/carbonado/Storable.html" title="interface in com.amazon.carbonado"><code>Storable</code></a>.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../com/amazon/carbonado/qe/UnionQueryAnalyzer.html" title="class in com.amazon.carbonado.qe">UnionQueryAnalyzer</a>&lt;S extends <a href="../../../../com/amazon/carbonado/Storable.html" title="interface in com.amazon.carbonado">Storable</a>&gt;</td>
<td class="colLast">
<div class="block">Analyzes a query specification and determines how it can be executed as a
 union of smaller queries.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../com/amazon/carbonado/qe/UnionQueryExecutor.html" title="class in com.amazon.carbonado.qe">UnionQueryExecutor</a>&lt;S extends <a href="../../../../com/amazon/carbonado/Storable.html" title="interface in com.amazon.carbonado">Storable</a>&gt;</td>
<td class="colLast">
<div class="block">QueryExecutor which wraps several others and unions the results.</div>
</td>
</tr>
</tbody>
</table>
</li>
<li class="blockList">
<table class="packageSummary" border="0" cellpadding="3" cellspacing="0" summary="Enum Summary table, listing enums, and an explanation">
<caption><span>Enum Summary</span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Enum</th>
<th class="colLast" scope="col">Description</th>
</tr>
<tbody>
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<td class="colFirst"><a href="../../../../com/amazon/carbonado/qe/BoundaryType.html" title="enum in com.amazon.carbonado.qe">BoundaryType</a></td>
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