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| <div class="subTitle"><span class="packageLabelInType">Package</span> <a href="package-summary.html">org.apache.calcite.plan</a></div> |
| <h1 title="Interface RelOptTable" class="title">Interface RelOptTable</h1> |
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| <div class="contentContainer"> |
| <section class="description"> |
| <dl> |
| <dt>All Superinterfaces:</dt> |
| <dd><code><a href="../schema/Wrapper.html" title="interface in org.apache.calcite.schema">Wrapper</a></code></dd> |
| </dl> |
| <dl> |
| <dt>All Known Subinterfaces:</dt> |
| <dd><code><a href="../prepare/Prepare.PreparingTable.html" title="interface in org.apache.calcite.prepare">Prepare.PreparingTable</a></code></dd> |
| </dl> |
| <dl> |
| <dt>All Known Implementing Classes:</dt> |
| <dd><code><a href="../prepare/Prepare.AbstractPreparingTable.html" title="class in org.apache.calcite.prepare">Prepare.AbstractPreparingTable</a></code>, <code><a href="RelOptAbstractTable.html" title="class in org.apache.calcite.plan">RelOptAbstractTable</a></code>, <code><a href="../prepare/RelOptTableImpl.html" title="class in org.apache.calcite.prepare">RelOptTableImpl</a></code></dd> |
| </dl> |
| <hr> |
| <pre>public interface <span class="typeNameLabel">RelOptTable</span> |
| extends <a href="../schema/Wrapper.html" title="interface in org.apache.calcite.schema">Wrapper</a></pre> |
| <div class="block">Represents a relational dataset in a <a href="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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| <thead> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colSecond" scope="col">Interface</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static interface </code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="RelOptTable.ToRelContext.html" title="interface in org.apache.calcite.plan">RelOptTable.ToRelContext</a></span></code></th> |
| <td class="colLast"> |
| <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 </code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="RelOptTable.ViewExpander.html" title="interface in org.apache.calcite.plan">RelOptTable.ViewExpander</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">Can expand a view into relational expressions.</div> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| </section> |
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| <h2>Method Summary</h2> |
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| <thead> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colSecond" scope="col">Method</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr class="altColor" id="i0"> |
| <td class="colFirst"><code><a href="RelOptTable.html" title="interface in org.apache.calcite.plan">RelOptTable</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#extend(java.util.List)">extend</a></span>​(<a href="https://docs.oracle.com/javase/9/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util" class="externalLink">List</a><<a href="../rel/type/RelDataTypeField.html" title="interface in org.apache.calcite.rel.type">RelDataTypeField</a>> extendedFields)</code></th> |
| <td class="colLast"> |
| <div class="block">Returns a table with the given extra fields.</div> |
| </td> |
| </tr> |
| <tr class="rowColor" id="i1"> |
| <td class="colFirst"><code>@Nullable <a href="https://docs.oracle.com/javase/9/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util" class="externalLink">List</a><<a href="../rel/RelCollation.html" title="interface in org.apache.calcite.rel">RelCollation</a>></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getCollationList()">getCollationList</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">Returns a description of the physical ordering (or orderings) of the rows |
| returned from this table.</div> |
| </td> |
| </tr> |
| <tr class="altColor" id="i2"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/9/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util" class="externalLink">List</a><<a href="../schema/ColumnStrategy.html" title="enum in org.apache.calcite.schema">ColumnStrategy</a>></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getColumnStrategies()">getColumnStrategies</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">Returns a list describing how each column is populated.</div> |
| </td> |
| </tr> |
| <tr class="rowColor" id="i3"> |
| <td class="colFirst"><code>@Nullable <a href="../rel/RelDistribution.html" title="interface in org.apache.calcite.rel">RelDistribution</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getDistribution()">getDistribution</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">Returns a description of the physical distribution of the rows |
| in this table.</div> |
| </td> |
| </tr> |
| <tr class="altColor" id="i4"> |
| <td class="colFirst"><code>@Nullable <a href="../linq4j/tree/Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getExpression(java.lang.Class)">getExpression</a></span>​(<a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a> clazz)</code></th> |
| <td class="colLast"> |
| <div class="block">Generates code for this table.</div> |
| </td> |
| </tr> |
| <tr class="rowColor" id="i5"> |
| <td class="colFirst"><code>@Nullable <a href="https://docs.oracle.com/javase/9/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util" class="externalLink">List</a><<a href="../util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a>></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getKeys()">getKeys</a></span>()</code></th> |
| <td class="colLast"> |
| <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 class="altColor" id="i6"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/9/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util" class="externalLink">List</a><<a href="https://docs.oracle.com/javase/9/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getQualifiedName()">getQualifiedName</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">Obtains an identifier for this table.</div> |
| </td> |
| </tr> |
| <tr class="rowColor" id="i7"> |
| <td class="colFirst"><code>@Nullable <a href="https://docs.oracle.com/javase/9/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util" class="externalLink">List</a><<a href="../rel/RelReferentialConstraint.html" title="interface in org.apache.calcite.rel">RelReferentialConstraint</a>></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getReferentialConstraints()">getReferentialConstraints</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">Returns the referential constraints existing for this table.</div> |
| </td> |
| </tr> |
| <tr class="altColor" id="i8"> |
| <td class="colFirst"><code>@Nullable <a href="RelOptSchema.html" title="interface in org.apache.calcite.plan">RelOptSchema</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getRelOptSchema()">getRelOptSchema</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">Returns the <a href="RelOptSchema.html" title="interface in org.apache.calcite.plan"><code>RelOptSchema</code></a> this table belongs to.</div> |
| </td> |
| </tr> |
| <tr class="rowColor" id="i9"> |
| <td class="colFirst"><code>double</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getRowCount()">getRowCount</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">Returns an estimate of the number of rows in the table.</div> |
| </td> |
| </tr> |
| <tr class="altColor" id="i10"> |
| <td class="colFirst"><code><a href="../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getRowType()">getRowType</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">Describes the type of rows returned by this table.</div> |
| </td> |
| </tr> |
| <tr class="rowColor" id="i11"> |
| <td class="colFirst"><code>boolean</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isKey(org.apache.calcite.util.ImmutableBitSet)">isKey</a></span>​(<a href="../util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a> columns)</code></th> |
| <td class="colLast"> |
| <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 class="altColor" id="i12"> |
| <td class="colFirst"><code><a href="../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#toRel(org.apache.calcite.plan.RelOptTable.ToRelContext)">toRel</a></span>​(<a href="RelOptTable.ToRelContext.html" title="interface in org.apache.calcite.plan">RelOptTable.ToRelContext</a> context)</code></th> |
| <td class="colLast"> |
| <div class="block">Converts this table into a <a href="../rel/RelNode.html" title="interface in org.apache.calcite.rel"><code>relational expression</code></a>.</div> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| </div> |
| <div class="inheritedList"> |
| <h3>Methods inherited from interface org.apache.calcite.schema.<a href="../schema/Wrapper.html" title="interface in org.apache.calcite.schema">Wrapper</a></h3> |
| <a id="methods.inherited.from.class.org.apache.calcite.schema.Wrapper"> |
| <!-- --> |
| </a><code><a href="../schema/Wrapper.html#maybeUnwrap(java.lang.Class)">maybeUnwrap</a>, <a href="../schema/Wrapper.html#unwrap(java.lang.Class)">unwrap</a>, <a href="../schema/Wrapper.html#unwrapOrThrow(java.lang.Class)">unwrapOrThrow</a></code></div> |
| </section> |
| </li> |
| </ul> |
| </section> |
| <section class="details"> |
| <ul class="blockList"> |
| <!-- ============ METHOD DETAIL ========== --> |
| <li class="blockList"> |
| <section class="methodDetails"><a id="method.detail"> |
| <!-- --> |
| </a> |
| <h2>Method Details</h2> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="getQualifiedName()">getQualifiedName</a></h3> |
| <div class="memberSignature"><span class="returnType"><a href="https://docs.oracle.com/javase/9/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util" class="externalLink">List</a><<a href="https://docs.oracle.com/javase/9/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>></span> <span class="memberName">getQualifiedName</span>()</div> |
| <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> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="getRowCount()">getRowCount</a></h3> |
| <div class="memberSignature"><span class="returnType">double</span> <span class="memberName">getRowCount</span>()</div> |
| <div class="block">Returns an estimate of the number of rows in the table.</div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="getRowType()">getRowType</a></h3> |
| <div class="memberSignature"><span class="returnType"><a href="../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a></span> <span class="memberName">getRowType</span>()</div> |
| <div class="block">Describes the type of rows returned by this table.</div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="getRelOptSchema()">getRelOptSchema</a></h3> |
| <div class="memberSignature"><span class="returnType">@Nullable <a href="RelOptSchema.html" title="interface in org.apache.calcite.plan">RelOptSchema</a></span> <span class="memberName">getRelOptSchema</span>()</div> |
| <div class="block">Returns the <a href="RelOptSchema.html" title="interface in org.apache.calcite.plan"><code>RelOptSchema</code></a> this table belongs to.</div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="toRel(org.apache.calcite.plan.RelOptTable.ToRelContext)">toRel</a></h3> |
| <div class="memberSignature"><span class="returnType"><a href="../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a></span> <span class="memberName">toRel</span>​(<span class="arguments"><a href="RelOptTable.ToRelContext.html" title="interface in org.apache.calcite.plan">RelOptTable.ToRelContext</a> context)</span></div> |
| <div class="block">Converts this table into a <a href="../rel/RelNode.html" title="interface in org.apache.calcite.rel"><code>relational expression</code></a>. |
| |
| <p>The <a href="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="../rel/logical/LogicalTableScan.html" title="class in org.apache.calcite.rel.logical"><code>LogicalTableScan</code></a>, |
| then optimizes this expression by |
| applying <a href="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> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="getCollationList()">getCollationList</a></h3> |
| <div class="memberSignature"><span class="returnType">@Nullable <a href="https://docs.oracle.com/javase/9/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util" class="externalLink">List</a><<a href="../rel/RelCollation.html" title="interface in org.apache.calcite.rel">RelCollation</a>></span> <span class="memberName">getCollationList</span>()</div> |
| <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="../rel/metadata/RelMetadataQuery.html#collations(org.apache.calcite.rel.RelNode)"><code>RelMetadataQuery.collations(RelNode)</code></a></dd> |
| </dl> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="getDistribution()">getDistribution</a></h3> |
| <div class="memberSignature"><span class="returnType">@Nullable <a href="../rel/RelDistribution.html" title="interface in org.apache.calcite.rel">RelDistribution</a></span> <span class="memberName">getDistribution</span>()</div> |
| <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="../rel/metadata/RelMetadataQuery.html#distribution(org.apache.calcite.rel.RelNode)"><code>RelMetadataQuery.distribution(RelNode)</code></a></dd> |
| </dl> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="isKey(org.apache.calcite.util.ImmutableBitSet)">isKey</a></h3> |
| <div class="memberSignature"><span class="returnType">boolean</span> <span class="memberName">isKey</span>​(<span class="arguments"><a href="../util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a> columns)</span></div> |
| <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> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="getKeys()">getKeys</a></h3> |
| <div class="memberSignature"><span class="returnType">@Nullable <a href="https://docs.oracle.com/javase/9/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util" class="externalLink">List</a><<a href="../util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a>></span> <span class="memberName">getKeys</span>()</div> |
| <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> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="getReferentialConstraints()">getReferentialConstraints</a></h3> |
| <div class="memberSignature"><span class="returnType">@Nullable <a href="https://docs.oracle.com/javase/9/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util" class="externalLink">List</a><<a href="../rel/RelReferentialConstraint.html" title="interface in org.apache.calcite.rel">RelReferentialConstraint</a>></span> <span class="memberName">getReferentialConstraints</span>()</div> |
| <div class="block">Returns the referential constraints existing for this table. These constraints |
| are represented over other tables using <a href="../rel/RelReferentialConstraint.html" title="interface in org.apache.calcite.rel"><code>RelReferentialConstraint</code></a> nodes.</div> |
| </section> |
| </li> |
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| <section class="detail"> |
| <h3><a id="getExpression(java.lang.Class)">getExpression</a></h3> |
| <div class="memberSignature"><span class="returnType">@Nullable <a href="../linq4j/tree/Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a></span> <span class="memberName">getExpression</span>​(<span class="arguments"><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a> clazz)</span></div> |
| <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> |
| </section> |
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| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="extend(java.util.List)">extend</a></h3> |
| <div class="memberSignature"><span class="returnType"><a href="RelOptTable.html" title="interface in org.apache.calcite.plan">RelOptTable</a></span> <span class="memberName">extend</span>​(<span class="arguments"><a href="https://docs.oracle.com/javase/9/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util" class="externalLink">List</a><<a href="../rel/type/RelDataTypeField.html" title="interface in org.apache.calcite.rel.type">RelDataTypeField</a>> extendedFields)</span></div> |
| <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> |
| </section> |
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| <section class="detail"> |
| <h3><a id="getColumnStrategies()">getColumnStrategies</a></h3> |
| <div class="memberSignature"><span class="returnType"><a href="https://docs.oracle.com/javase/9/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util" class="externalLink">List</a><<a href="../schema/ColumnStrategy.html" title="enum in org.apache.calcite.schema">ColumnStrategy</a>></span> <span class="memberName">getColumnStrategies</span>()</div> |
| <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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