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<div class="subTitle"><span class="packageLabelInType">Package</span>&nbsp;<a href="package-summary.html">org.apache.calcite.rel.logical</a></div>
<h2 title="Class LogicalTableScan" class="title">Class LogicalTableScan</h2>
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<ul class="inheritance">
<li>java.lang.Object</li>
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<li><a href="../AbstractRelNode.html" title="class in org.apache.calcite.rel">org.apache.calcite.rel.AbstractRelNode</a></li>
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<li><a href="../core/TableScan.html" title="class in org.apache.calcite.rel.core">org.apache.calcite.rel.core.TableScan</a></li>
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<li>org.apache.calcite.rel.logical.LogicalTableScan</li>
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<dd><code>java.lang.Cloneable</code>, <code><a href="../../plan/RelOptNode.html" title="interface in org.apache.calcite.plan">RelOptNode</a></code>, <code><a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a></code></dd>
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<pre>public final class <span class="typeNameLabel">LogicalTableScan</span>
extends <a href="../core/TableScan.html" title="class in org.apache.calcite.rel.core">TableScan</a></pre>
<div class="block">A <code>LogicalTableScan</code> reads all the rows from a
<a href="../../plan/RelOptTable.html" title="interface in org.apache.calcite.plan"><code>RelOptTable</code></a>.
<p>If the table is a <code>net.sf.saffron.ext.JdbcTable</code>, then this is
literally possible. But for other kinds of tables, there may be many ways to
read the data from the table. For some kinds of table, it may not even be
possible to read all of the rows unless some narrowing constraint is applied.
<p>In the example of the <code>net.sf.saffron.ext.ReflectSchema</code>
schema,</p>
<blockquote>
<pre>select from fields</pre>
</blockquote>
<p>cannot be implemented, but</p>
<blockquote>
<pre>select from fields as f
where f.getClass().getName().equals("java.lang.String")</pre>
</blockquote>
<p>can. It is the optimizer's responsibility to find these ways, by applying
transformation rules.</p></div>
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<code><a href="../core/TableScan.html#table">table</a></code></li>
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<th class="colFirst" scope="col">Constructor</th>
<th class="colLast" scope="col">Description</th>
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<tr class="altColor">
<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(org.apache.calcite.plan.RelOptCluster,org.apache.calcite.plan.RelOptTable)">LogicalTableScan</a></span>&#8203;(<a href="../../plan/RelOptCluster.html" title="class in org.apache.calcite.plan">RelOptCluster</a>&nbsp;cluster,
<a href="../../plan/RelOptTable.html" title="interface in org.apache.calcite.plan">RelOptTable</a>&nbsp;table)</code></th>
<td class="colLast">
<div class="block"><span class="deprecatedLabel">Deprecated.</span></div>
</td>
</tr>
<tr class="rowColor">
<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(org.apache.calcite.plan.RelOptCluster,org.apache.calcite.plan.RelTraitSet,org.apache.calcite.plan.RelOptTable)">LogicalTableScan</a></span>&#8203;(<a href="../../plan/RelOptCluster.html" title="class in org.apache.calcite.plan">RelOptCluster</a>&nbsp;cluster,
<a href="../../plan/RelTraitSet.html" title="class in org.apache.calcite.plan">RelTraitSet</a>&nbsp;traitSet,
<a href="../../plan/RelOptTable.html" title="interface in org.apache.calcite.plan">RelOptTable</a>&nbsp;table)</code></th>
<td class="colLast">
<div class="block">Creates a LogicalTableScan.</div>
</td>
</tr>
<tr class="altColor">
<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(org.apache.calcite.rel.RelInput)">LogicalTableScan</a></span>&#8203;(<a href="../RelInput.html" title="interface in org.apache.calcite.rel">RelInput</a>&nbsp;input)</code></th>
<td class="colLast">
<div class="block">Creates a LogicalTableScan by parsing serialized output.</div>
</td>
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</table>
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<th class="colSecond" scope="col">Method</th>
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<td class="colFirst"><code><a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#copy(org.apache.calcite.plan.RelTraitSet,java.util.List)">copy</a></span>&#8203;(<a href="../../plan/RelTraitSet.html" title="class in org.apache.calcite.plan">RelTraitSet</a>&nbsp;traitSet,
java.util.List&lt;<a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&gt;&nbsp;inputs)</code></th>
<td class="colLast">
<div class="block">Creates a copy of this relational expression, perhaps changing traits and
inputs.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>static <a href="LogicalTableScan.html" title="class in org.apache.calcite.rel.logical">LogicalTableScan</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#create(org.apache.calcite.plan.RelOptCluster,org.apache.calcite.plan.RelOptTable)">create</a></span>&#8203;(<a href="../../plan/RelOptCluster.html" title="class in org.apache.calcite.plan">RelOptCluster</a>&nbsp;cluster,
<a href="../../plan/RelOptTable.html" title="interface in org.apache.calcite.plan">RelOptTable</a>&nbsp;relOptTable)</code></th>
<td class="colLast">
<div class="block">Creates a LogicalTableScan.</div>
</td>
</tr>
</table>
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<h3>Methods inherited from class&nbsp;org.apache.calcite.rel.core.<a href="../core/TableScan.html" title="class in org.apache.calcite.rel.core">TableScan</a></h3>
<code><a href="../core/TableScan.html#accept(org.apache.calcite.rel.RelShuttle)">accept</a>, <a href="../core/TableScan.html#computeSelfCost(org.apache.calcite.plan.RelOptPlanner,org.apache.calcite.rel.metadata.RelMetadataQuery)">computeSelfCost</a>, <a href="../core/TableScan.html#deriveRowType()">deriveRowType</a>, <a href="../core/TableScan.html#estimateRowCount(org.apache.calcite.rel.metadata.RelMetadataQuery)">estimateRowCount</a>, <a href="../core/TableScan.html#explainTerms(org.apache.calcite.rel.RelWriter)">explainTerms</a>, <a href="../core/TableScan.html#getCollationList()">getCollationList</a>, <a href="../core/TableScan.html#getTable()">getTable</a>, <a href="../core/TableScan.html#identity()">identity</a>, <a href="../core/TableScan.html#identity(org.apache.calcite.plan.RelOptTable)">identity</a>, <a href="../core/TableScan.html#project(org.apache.calcite.util.ImmutableBitSet,java.util.Set,org.apache.calcite.tools.RelBuilder)">project</a></code></li>
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<code><a href="../AbstractRelNode.html#accept(org.apache.calcite.rex.RexShuttle)">accept</a>, <a href="../AbstractRelNode.html#childrenAccept(org.apache.calcite.rel.RelVisitor)">childrenAccept</a>, <a href="../AbstractRelNode.html#collectVariablesSet(java.util.Set)">collectVariablesSet</a>, <a href="../AbstractRelNode.html#collectVariablesUsed(java.util.Set)">collectVariablesUsed</a>, <a href="../AbstractRelNode.html#computeDigest()">computeDigest</a>, <a href="../AbstractRelNode.html#computeSelfCost(org.apache.calcite.plan.RelOptPlanner)">computeSelfCost</a>, <a href="../AbstractRelNode.html#explain(org.apache.calcite.rel.RelWriter)">explain</a>, <a href="../AbstractRelNode.html#getChildExps()">getChildExps</a>, <a href="../AbstractRelNode.html#getCluster()">getCluster</a>, <a href="../AbstractRelNode.html#getConvention()">getConvention</a>, <a href="../AbstractRelNode.html#getCorrelVariable()">getCorrelVariable</a>, <a href="../AbstractRelNode.html#getDescription()">getDescription</a>, <a href="../AbstractRelNode.html#getDigest()">getDigest</a>, <a href="../AbstractRelNode.html#getExpectedInputRowType(int)">getExpectedInputRowType</a>, <a href="../AbstractRelNode.html#getId()">getId</a>, <a href="../AbstractRelNode.html#getInput(int)">getInput</a>, <a href="../AbstractRelNode.html#getInputs()">getInputs</a>, <a href="../AbstractRelNode.html#getQuery()">getQuery</a>, <a href="../AbstractRelNode.html#getRelTypeName()">getRelTypeName</a>, <a href="../AbstractRelNode.html#getRows()">getRows</a>, <a href="../AbstractRelNode.html#getRowType()">getRowType</a>, <a href="../AbstractRelNode.html#getTraitSet()">getTraitSet</a>, <a href="../AbstractRelNode.html#getVariablesSet()">getVariablesSet</a>, <a href="../AbstractRelNode.html#getVariablesStopped()">getVariablesStopped</a>, <a href="../AbstractRelNode.html#isDistinct()">isDistinct</a>, <a href="../AbstractRelNode.html#isKey(org.apache.calcite.util.ImmutableBitSet)">isKey</a>, <a href="../AbstractRelNode.html#isValid(boolean)">isValid</a>, <a href="../AbstractRelNode.html#isValid(org.apache.calcite.util.Litmus,org.apache.calcite.rel.RelNode.Context)">isValid</a>, <a href="../AbstractRelNode.html#metadata(java.lang.Class,org.apache.calcite.rel.metadata.RelMetadataQuery)">metadata</a>, <a href="../AbstractRelNode.html#onRegister(org.apache.calcite.plan.RelOptPlanner)">onRegister</a>, <a href="../AbstractRelNode.html#recomputeDigest()">recomputeDigest</a>, <a href="../AbstractRelNode.html#register(org.apache.calcite.plan.RelOptPlanner)">register</a>, <a href="../AbstractRelNode.html#replaceInput(int,org.apache.calcite.rel.RelNode)">replaceInput</a>, <a href="../AbstractRelNode.html#sole(java.util.List)">sole</a>, <a href="../AbstractRelNode.html#toString()">toString</a></code></li>
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<h4>LogicalTableScan</h4>
<pre>public&nbsp;LogicalTableScan&#8203;(<a href="../../plan/RelOptCluster.html" title="class in org.apache.calcite.plan">RelOptCluster</a>&nbsp;cluster,
<a href="../../plan/RelTraitSet.html" title="class in org.apache.calcite.plan">RelTraitSet</a>&nbsp;traitSet,
<a href="../../plan/RelOptTable.html" title="interface in org.apache.calcite.plan">RelOptTable</a>&nbsp;table)</pre>
<div class="block">Creates a LogicalTableScan.
<p>Use <a href="#create(org.apache.calcite.plan.RelOptCluster,org.apache.calcite.plan.RelOptTable)"><code>create(org.apache.calcite.plan.RelOptCluster, org.apache.calcite.plan.RelOptTable)</code></a> unless you know what you're doing.</div>
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<h4>LogicalTableScan</h4>
<pre>@Deprecated
public&nbsp;LogicalTableScan&#8203;(<a href="../../plan/RelOptCluster.html" title="class in org.apache.calcite.plan">RelOptCluster</a>&nbsp;cluster,
<a href="../../plan/RelOptTable.html" title="interface in org.apache.calcite.plan">RelOptTable</a>&nbsp;table)</pre>
<div class="deprecationBlock"><span class="deprecatedLabel">Deprecated.</span></div>
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<h4>LogicalTableScan</h4>
<pre>public&nbsp;LogicalTableScan&#8203;(<a href="../RelInput.html" title="interface in org.apache.calcite.rel">RelInput</a>&nbsp;input)</pre>
<div class="block">Creates a LogicalTableScan by parsing serialized output.</div>
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<h4>copy</h4>
<pre class="methodSignature">public&nbsp;<a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;copy&#8203;(<a href="../../plan/RelTraitSet.html" title="class in org.apache.calcite.plan">RelTraitSet</a>&nbsp;traitSet,
java.util.List&lt;<a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&gt;&nbsp;inputs)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../RelNode.html#copy(org.apache.calcite.plan.RelTraitSet,java.util.List)">RelNode</a></code></span></div>
<div class="block">Creates a copy of this relational expression, perhaps changing traits and
inputs.
<p>Sub-classes with other important attributes are encouraged to create
variants of this method with more parameters.</p></div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../RelNode.html#copy(org.apache.calcite.plan.RelTraitSet,java.util.List)">copy</a></code>&nbsp;in interface&nbsp;<code><a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a></code></dd>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="../AbstractRelNode.html#copy(org.apache.calcite.plan.RelTraitSet,java.util.List)">copy</a></code>&nbsp;in class&nbsp;<code><a href="../AbstractRelNode.html" title="class in org.apache.calcite.rel">AbstractRelNode</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>traitSet</code> - Trait set</dd>
<dd><code>inputs</code> - Inputs</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Copy of this relational expression, substituting traits and
inputs</dd>
</dl>
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<h4>create</h4>
<pre class="methodSignature">public static&nbsp;<a href="LogicalTableScan.html" title="class in org.apache.calcite.rel.logical">LogicalTableScan</a>&nbsp;create&#8203;(<a href="../../plan/RelOptCluster.html" title="class in org.apache.calcite.plan">RelOptCluster</a>&nbsp;cluster,
<a href="../../plan/RelOptTable.html" title="interface in org.apache.calcite.plan">RelOptTable</a>&nbsp;relOptTable)</pre>
<div class="block">Creates a LogicalTableScan.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>cluster</code> - Cluster</dd>
<dd><code>relOptTable</code> - Table</dd>
</dl>
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