javadocAggregate/org/apache/calcite/plan/RelOptTable.html - calcite-site - Git at Google

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 <h2 title="Interface RelOptTable" class="title">Interface RelOptTable</h2>
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 <dt>All Known Subinterfaces:</dt>
 <dd><a href="../../../../org/apache/calcite/prepare/Prepare.PreparingTable.html" title="interface in org.apache.calcite.prepare">Prepare.PreparingTable</a></dd>
 </dl>
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 <dt>All Known Implementing Classes:</dt>
 <dd><a href="../../../../org/apache/calcite/prepare/Prepare.AbstractPreparingTable.html" title="class in org.apache.calcite.prepare">Prepare.AbstractPreparingTable</a>, <a href="../../../../org/apache/calcite/plan/RelOptAbstractTable.html" title="class in org.apache.calcite.plan">RelOptAbstractTable</a>, <a href="../../../../org/apache/calcite/prepare/RelOptTableImpl.html" title="class in org.apache.calcite.prepare">RelOptTableImpl</a></dd>
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 <pre>public interface <span class="typeNameLabel">RelOptTable</span>
 extends <a href="../../../../org/apache/calcite/schema/Wrapper.html" title="interface in org.apache.calcite.schema">Wrapper</a></pre>
 <div class="block">Represents a relational dataset in a <a href="../../../../org/apache/calcite/plan/RelOptSchema.html" title="interface in org.apache.calcite.plan"><code>RelOptSchema</code></a>. It has methods to
  describe and implement itself.</div>
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 <caption><span>Nested Classes</span><span class="tabEnd">&nbsp;</span></caption>
 <tr>
 <th class="colFirst" scope="col">Modifier and Type</th>
 <th class="colLast" scope="col">Interface and Description</th>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>static interface&nbsp;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptTable.ToRelContext.html" title="interface in org.apache.calcite.plan">RelOptTable.ToRelContext</a></span></code>
 <div class="block">Contains the context needed to convert a a table into a relational
  expression.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>static interface&nbsp;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptTable.ViewExpander.html" title="interface in org.apache.calcite.plan">RelOptTable.ViewExpander</a></span></code>
 <div class="block">Can expand a view into relational expressions.</div>
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 <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd">&nbsp;</span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t3" class="tableTab"><span><a href="javascript:show(4);">Abstract Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
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 <th class="colFirst" scope="col">Modifier and Type</th>
 <th class="colLast" scope="col">Method and Description</th>
 </tr>
 <tr id="i0" class="altColor">
 <td class="colFirst"><code><a href="../../../../org/apache/calcite/plan/RelOptTable.html" title="interface in org.apache.calcite.plan">RelOptTable</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptTable.html#extend-java.util.List-">extend</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../org/apache/calcite/rel/type/RelDataTypeField.html" title="interface in org.apache.calcite.rel.type">RelDataTypeField</a>&gt;&nbsp;extendedFields)</code>
 <div class="block">Returns a table with the given extra fields.</div>
 </td>
 </tr>
 <tr id="i1" class="rowColor">
 <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../org/apache/calcite/rel/RelCollation.html" title="interface in org.apache.calcite.rel">RelCollation</a>&gt;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptTable.html#getCollationList--">getCollationList</a></span>()</code>
 <div class="block">Returns a description of the physical ordering (or orderings) of the rows
  returned from this table.</div>
 </td>
 </tr>
 <tr id="i2" class="altColor">
 <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../org/apache/calcite/schema/ColumnStrategy.html" title="enum in org.apache.calcite.schema">ColumnStrategy</a>&gt;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptTable.html#getColumnStrategies--">getColumnStrategies</a></span>()</code>
 <div class="block">Returns a list describing how each column is populated.</div>
 </td>
 </tr>
 <tr id="i3" class="rowColor">
 <td class="colFirst"><code><a href="../../../../org/apache/calcite/rel/RelDistribution.html" title="interface in org.apache.calcite.rel">RelDistribution</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptTable.html#getDistribution--">getDistribution</a></span>()</code>
 <div class="block">Returns a description of the physical distribution of the rows
  in this table.</div>
 </td>
 </tr>
 <tr id="i4" class="altColor">
 <td class="colFirst"><code><a href="../../../../org/apache/calcite/linq4j/tree/Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptTable.html#getExpression-java.lang.Class-">getExpression</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a>&nbsp;clazz)</code>
 <div class="block">Generates code for this table.</div>
 </td>
 </tr>
 <tr id="i5" class="rowColor">
 <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../org/apache/calcite/util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a>&gt;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptTable.html#getKeys--">getKeys</a></span>()</code>
 <div class="block">Returns a list of unique keys, empty list if no key exist,
  the result should be consistent with <code>isKey</code></div>
 </td>
 </tr>
 <tr id="i6" class="altColor">
 <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&gt;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptTable.html#getQualifiedName--">getQualifiedName</a></span>()</code>
 <div class="block">Obtains an identifier for this table.</div>
 </td>
 </tr>
 <tr id="i7" class="rowColor">
 <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../org/apache/calcite/rel/RelReferentialConstraint.html" title="interface in org.apache.calcite.rel">RelReferentialConstraint</a>&gt;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptTable.html#getReferentialConstraints--">getReferentialConstraints</a></span>()</code>
 <div class="block">Returns the referential constraints existing for this table.</div>
 </td>
 </tr>
 <tr id="i8" class="altColor">
 <td class="colFirst"><code><a href="../../../../org/apache/calcite/plan/RelOptSchema.html" title="interface in org.apache.calcite.plan">RelOptSchema</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptTable.html#getRelOptSchema--">getRelOptSchema</a></span>()</code>
 <div class="block">Returns the <a href="../../../../org/apache/calcite/plan/RelOptSchema.html" title="interface in org.apache.calcite.plan"><code>RelOptSchema</code></a> this table belongs to.</div>
 </td>
 </tr>
 <tr id="i9" class="rowColor">
 <td class="colFirst"><code>double</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptTable.html#getRowCount--">getRowCount</a></span>()</code>
 <div class="block">Returns an estimate of the number of rows in the table.</div>
 </td>
 </tr>
 <tr id="i10" class="altColor">
 <td class="colFirst"><code><a href="../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptTable.html#getRowType--">getRowType</a></span>()</code>
 <div class="block">Describes the type of rows returned by this table.</div>
 </td>
 </tr>
 <tr id="i11" class="rowColor">
 <td class="colFirst"><code>boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptTable.html#isKey-org.apache.calcite.util.ImmutableBitSet-">isKey</a></span>(<a href="../../../../org/apache/calcite/util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a>&nbsp;columns)</code>
 <div class="block">Returns whether the given columns are a key or a superset of a unique key
  of this table.</div>
 </td>
 </tr>
 <tr id="i12" class="altColor">
 <td class="colFirst"><code><a href="../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptTable.html#toRel-org.apache.calcite.plan.RelOptTable.ToRelContext-">toRel</a></span>(<a href="../../../../org/apache/calcite/plan/RelOptTable.ToRelContext.html" title="interface in org.apache.calcite.plan">RelOptTable.ToRelContext</a>&nbsp;context)</code>
 <div class="block">Converts this table into a <a href="../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel"><code>relational expression</code></a>.</div>
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 <h3>Methods inherited from interface&nbsp;org.apache.calcite.schema.<a href="../../../../org/apache/calcite/schema/Wrapper.html" title="interface in org.apache.calcite.schema">Wrapper</a></h3>
 <code><a href="../../../../org/apache/calcite/schema/Wrapper.html#unwrap-java.lang.Class-">unwrap</a></code></li>
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 <h3>Method Detail</h3>
 <a name="getQualifiedName--">
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 <h4>getQualifiedName</h4>
 <pre><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&gt;&nbsp;getQualifiedName()</pre>
 <div class="block">Obtains an identifier for this table. The identifier must be unique with
  respect to the Connection producing this table.</div>
 <dl>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>qualified name</dd>
 </dl>
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 <h4>getRowCount</h4>
 <pre>double&nbsp;getRowCount()</pre>
 <div class="block">Returns an estimate of the number of rows in the table.</div>
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 <h4>getRowType</h4>
 <pre><a href="../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;getRowType()</pre>
 <div class="block">Describes the type of rows returned by this table.</div>
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 <a name="getRelOptSchema--">
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 <h4>getRelOptSchema</h4>
 <pre><a href="../../../../org/apache/calcite/plan/RelOptSchema.html" title="interface in org.apache.calcite.plan">RelOptSchema</a>&nbsp;getRelOptSchema()</pre>
 <div class="block">Returns the <a href="../../../../org/apache/calcite/plan/RelOptSchema.html" title="interface in org.apache.calcite.plan"><code>RelOptSchema</code></a> this table belongs to.</div>
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 <a name="toRel-org.apache.calcite.plan.RelOptTable.ToRelContext-">
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 <h4>toRel</h4>
 <pre><a href="../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;toRel(<a href="../../../../org/apache/calcite/plan/RelOptTable.ToRelContext.html" title="interface in org.apache.calcite.plan">RelOptTable.ToRelContext</a>&nbsp;context)</pre>
 <div class="block">Converts this table into a <a href="../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel"><code>relational expression</code></a>.

  <p>The <a href="../../../../org/apache/calcite/plan/RelOptPlanner.html" title="interface in org.apache.calcite.plan"><code>planner</code></a> calls this
  method to convert a table into an initial relational expression,
  generally something abstract, such as a
  <a href="../../../../org/apache/calcite/rel/logical/LogicalTableScan.html" title="class in org.apache.calcite.rel.logical"><code>LogicalTableScan</code></a>,
  then optimizes this expression by
  applying <a href="../../../../org/apache/calcite/plan/RelOptRule.html" title="class in org.apache.calcite.plan"><code>rules</code></a> to transform it
  into more efficient access methods for this table.</p></div>
 </li>
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 <a name="getCollationList--">
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 <h4>getCollationList</h4>
 <pre><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../org/apache/calcite/rel/RelCollation.html" title="interface in org.apache.calcite.rel">RelCollation</a>&gt;&nbsp;getCollationList()</pre>
 <div class="block">Returns a description of the physical ordering (or orderings) of the rows
  returned from this table.</div>
 <dl>
 <dt><span class="seeLabel">See Also:</span></dt>
 <dd><a href="../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#collations-org.apache.calcite.rel.RelNode-"><code>RelMetadataQuery.collations(RelNode)</code></a></dd>
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 <h4>getDistribution</h4>
 <pre><a href="../../../../org/apache/calcite/rel/RelDistribution.html" title="interface in org.apache.calcite.rel">RelDistribution</a>&nbsp;getDistribution()</pre>
 <div class="block">Returns a description of the physical distribution of the rows
  in this table.</div>
 <dl>
 <dt><span class="seeLabel">See Also:</span></dt>
 <dd><a href="../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#distribution-org.apache.calcite.rel.RelNode-"><code>RelMetadataQuery.distribution(RelNode)</code></a></dd>
 </dl>
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 <h4>isKey</h4>
 <pre>boolean&nbsp;isKey(<a href="../../../../org/apache/calcite/util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a>&nbsp;columns)</pre>
 <div class="block">Returns whether the given columns are a key or a superset of a unique key
  of this table.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>columns</code> - Ordinals of key columns</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>Whether the given columns are a key or a superset of a key</dd>
 </dl>
 </li>
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 <a name="getKeys--">
 <!--   -->
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 <h4>getKeys</h4>
 <pre><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../org/apache/calcite/util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a>&gt;&nbsp;getKeys()</pre>
 <div class="block">Returns a list of unique keys, empty list if no key exist,
  the result should be consistent with <code>isKey</code></div>
 </li>
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 <a name="getReferentialConstraints--">
 <!--   -->
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 <h4>getReferentialConstraints</h4>
 <pre><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../org/apache/calcite/rel/RelReferentialConstraint.html" title="interface in org.apache.calcite.rel">RelReferentialConstraint</a>&gt;&nbsp;getReferentialConstraints()</pre>
 <div class="block">Returns the referential constraints existing for this table. These constraints
  are represented over other tables using <a href="../../../../org/apache/calcite/rel/RelReferentialConstraint.html" title="interface in org.apache.calcite.rel"><code>RelReferentialConstraint</code></a> nodes.</div>
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 <h4>getExpression</h4>
 <pre><a href="../../../../org/apache/calcite/linq4j/tree/Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a>&nbsp;getExpression(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a>&nbsp;clazz)</pre>
 <div class="block">Generates code for this table.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>clazz</code> - The desired collection class; for example <code>Queryable</code>.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the code for the table, or null if code generation is not supported</dd>
 </dl>
 </li>
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 <a name="extend-java.util.List-">
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 <h4>extend</h4>
 <pre><a href="../../../../org/apache/calcite/plan/RelOptTable.html" title="interface in org.apache.calcite.plan">RelOptTable</a>&nbsp;extend(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../org/apache/calcite/rel/type/RelDataTypeField.html" title="interface in org.apache.calcite.rel.type">RelDataTypeField</a>&gt;&nbsp;extendedFields)</pre>
 <div class="block">Returns a table with the given extra fields.

  <p>The extended table includes the fields of this base table plus the
  extended fields that do not have the same name as a field in the base
  table.</div>
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 <h4>getColumnStrategies</h4>
 <pre><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../org/apache/calcite/schema/ColumnStrategy.html" title="enum in org.apache.calcite.schema">ColumnStrategy</a>&gt;&nbsp;getColumnStrategies()</pre>
 <div class="block">Returns a list describing how each column is populated. The list has the
   same number of entries as there are fields, and is immutable.</div>
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