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| <div class="subTitle"><span class="packageLabelInType">Package</span> <a href="package-summary.html">org.apache.calcite.sql2rel</a></div> |
| <h1 title="Class RelFieldTrimmer" class="title">Class RelFieldTrimmer</h1> |
| </div> |
| <div class="contentContainer"> |
| <div class="inheritance" title="Inheritance Tree"><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">java.lang.Object</a> |
| <div class="inheritance">org.apache.calcite.sql2rel.RelFieldTrimmer</div> |
| </div> |
| <section class="description"> |
| <dl> |
| <dt>All Implemented Interfaces:</dt> |
| <dd><code><a href="../util/ReflectiveVisitor.html" title="interface in org.apache.calcite.util">ReflectiveVisitor</a></code></dd> |
| </dl> |
| <hr> |
| <pre>public class <span class="typeNameLabel">RelFieldTrimmer</span> |
| extends <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a> |
| implements <a href="../util/ReflectiveVisitor.html" title="interface in org.apache.calcite.util">ReflectiveVisitor</a></pre> |
| <div class="block">Transformer that walks over a tree of relational expressions, replacing each |
| <a href="../rel/RelNode.html" title="interface in org.apache.calcite.rel"><code>RelNode</code></a> with a 'slimmed down' relational expression that projects |
| only the columns required by its consumer. |
| |
| <p>Uses multi-methods to fire the right rule for each type of relational |
| expression. This allows the transformer to be extended without having to |
| add a new method to RelNode, and without requiring a collection of rule |
| classes scattered to the four winds. |
| |
| <p>REVIEW: jhyde, 2009/7/28: Is sql2rel the correct package for this class? |
| Trimming fields is not an essential part of SQL-to-Rel translation, and |
| arguably belongs in the optimization phase. But this transformer does not |
| obey the usual pattern for planner rules; it is difficult to do so, because |
| each <a href="../rel/RelNode.html" title="interface in org.apache.calcite.rel"><code>RelNode</code></a> needs to return a different set of fields after |
| trimming. |
| |
| <p>TODO: Change 2nd arg of the <a href="#trimFields(org.apache.calcite.rel.RelNode,org.apache.calcite.util.ImmutableBitSet,java.util.Set)"><code>trimFields(org.apache.calcite.rel.RelNode, org.apache.calcite.util.ImmutableBitSet, java.util.Set<org.apache.calcite.rel.type.RelDataTypeField>)</code></a> method from BitSet to |
| Mapping. Sometimes it helps the consumer if you return the columns in a |
| particular order. For instance, it may avoid a project at the top of the |
| tree just for reordering. Could ease the transition by writing methods that |
| convert BitSet to Mapping and vice versa.</div> |
| </section> |
| <section class="summary"> |
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| <!-- ======== NESTED CLASS SUMMARY ======== --> |
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| <thead> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colSecond" scope="col">Class</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr class="altColor"> |
| <td class="colFirst"><code>protected static class </code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="RelFieldTrimmer.TrimResult.html" title="class in org.apache.calcite.sql2rel">RelFieldTrimmer.TrimResult</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">Result of an attempt to trim columns from a relational expression.</div> |
| </td> |
| </tr> |
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| <thead> |
| <tr> |
| <th class="colFirst" scope="col">Constructor</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr class="altColor"> |
| <th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(org.apache.calcite.sql.validate.SqlValidator,org.apache.calcite.plan.RelOptCluster,org.apache.calcite.rel.core.RelFactories.ProjectFactory,org.apache.calcite.rel.core.RelFactories.FilterFactory,org.apache.calcite.rel.core.RelFactories.JoinFactory,org.apache.calcite.rel.core.RelFactories.SortFactory,org.apache.calcite.rel.core.RelFactories.AggregateFactory,org.apache.calcite.rel.core.RelFactories.SetOpFactory)">RelFieldTrimmer</a></span>​(@Nullable <a href="../sql/validate/SqlValidator.html" title="interface in org.apache.calcite.sql.validate">SqlValidator</a> validator, |
| <a href="../plan/RelOptCluster.html" title="class in org.apache.calcite.plan">RelOptCluster</a> cluster, |
| <a href="../rel/core/RelFactories.ProjectFactory.html" title="interface in org.apache.calcite.rel.core">RelFactories.ProjectFactory</a> projectFactory, |
| <a href="../rel/core/RelFactories.FilterFactory.html" title="interface in org.apache.calcite.rel.core">RelFactories.FilterFactory</a> filterFactory, |
| <a href="../rel/core/RelFactories.JoinFactory.html" title="interface in org.apache.calcite.rel.core">RelFactories.JoinFactory</a> joinFactory, |
| <a href="../rel/core/RelFactories.SortFactory.html" title="interface in org.apache.calcite.rel.core">RelFactories.SortFactory</a> sortFactory, |
| <a href="../rel/core/RelFactories.AggregateFactory.html" title="interface in org.apache.calcite.rel.core">RelFactories.AggregateFactory</a> aggregateFactory, |
| <a href="../rel/core/RelFactories.SetOpFactory.html" title="interface in org.apache.calcite.rel.core">RelFactories.SetOpFactory</a> setOpFactory)</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.sql.validate.SqlValidator,org.apache.calcite.tools.RelBuilder)">RelFieldTrimmer</a></span>​(@Nullable <a href="../sql/validate/SqlValidator.html" title="interface in org.apache.calcite.sql.validate">SqlValidator</a> validator, |
| <a href="../tools/RelBuilder.html" title="class in org.apache.calcite.tools">RelBuilder</a> relBuilder)</code></th> |
| <td class="colLast"> |
| <div class="block">Creates a RelFieldTrimmer.</div> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| </section> |
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| <h2>Method Summary</h2> |
| <div class="memberSummary"> |
| <div role="tablist" aria-orientation="horizontal"><button role="tab" aria-selected="true" aria-controls="memberSummary_tabpanel" tabindex="0" onkeydown="switchTab(event)" id="t0" class="activeTableTab">All Methods</button><button role="tab" aria-selected="false" aria-controls="memberSummary_tabpanel" tabindex="-1" onkeydown="switchTab(event)" id="t2" class="tableTab" onclick="show(2);">Instance Methods</button><button role="tab" aria-selected="false" aria-controls="memberSummary_tabpanel" tabindex="-1" onkeydown="switchTab(event)" id="t4" class="tableTab" onclick="show(8);">Concrete Methods</button></div> |
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| <th class="colFirst" scope="col">Modifier and Type</th> |
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| <th class="colLast" scope="col">Description</th> |
| </tr> |
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| <tbody> |
| <tr class="altColor" id="i0"> |
| <td class="colFirst"><code>protected <a href="../util/mapping/Mapping.html" title="interface in org.apache.calcite.util.mapping">Mapping</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#createMapping(org.apache.calcite.util.ImmutableBitSet,int)">createMapping</a></span>​(<a href="../util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a> fieldsUsed, |
| int fieldCount)</code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="rowColor" id="i1"> |
| <td class="colFirst"><code>protected <a href="RelFieldTrimmer.TrimResult.html" title="class in org.apache.calcite.sql2rel">RelFieldTrimmer.TrimResult</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#dispatchTrimFields(org.apache.calcite.rel.RelNode,org.apache.calcite.util.ImmutableBitSet,java.util.Set)">dispatchTrimFields</a></span>​(<a href="../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a> rel, |
| <a href="../util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a> fieldsUsed, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util" class="externalLink">Set</a><<a href="../rel/type/RelDataTypeField.html" title="interface in org.apache.calcite.rel.type">RelDataTypeField</a>> extraFields)</code></th> |
| <td class="colLast"> |
| <div class="block">Invokes <a href="#trimFields(org.apache.calcite.rel.RelNode,org.apache.calcite.util.ImmutableBitSet,java.util.Set)"><code>trimFields(org.apache.calcite.rel.RelNode, org.apache.calcite.util.ImmutableBitSet, java.util.Set<org.apache.calcite.rel.type.RelDataTypeField>)</code></a>, or the appropriate method for the type |
| of the rel parameter, using multi-method dispatch.</div> |
| </td> |
| </tr> |
| <tr class="altColor" id="i2"> |
| <td class="colFirst"><code>protected <a href="RelFieldTrimmer.TrimResult.html" title="class in org.apache.calcite.sql2rel">RelFieldTrimmer.TrimResult</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#dummyProject(int,org.apache.calcite.rel.RelNode)">dummyProject</a></span>​(int fieldCount, |
| <a href="../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a> input)</code></th> |
| <td class="colLast"> |
| <div class="block">Creates a project with a dummy column, to protect the parts of the system |
| that cannot handle a relational expression with no columns.</div> |
| </td> |
| </tr> |
| <tr class="rowColor" id="i3"> |
| <td class="colFirst"><code>protected <a href="RelFieldTrimmer.TrimResult.html" title="class in org.apache.calcite.sql2rel">RelFieldTrimmer.TrimResult</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#dummyProject(int,org.apache.calcite.rel.RelNode,org.apache.calcite.rel.RelNode)">dummyProject</a></span>​(int fieldCount, |
| <a href="../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a> input, |
| @Nullable <a href="../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a> originalRelNode)</code></th> |
| <td class="colLast"> |
| <div class="block">Creates a project with a dummy column, to protect the parts of the system |
| that cannot handle a relational expression with no columns.</div> |
| </td> |
| </tr> |
| <tr class="altColor" id="i4"> |
| <td class="colFirst"><code>protected <a href="RelFieldTrimmer.TrimResult.html" title="class in org.apache.calcite.sql2rel">RelFieldTrimmer.TrimResult</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#result(org.apache.calcite.rel.RelNode,org.apache.calcite.util.mapping.Mapping)">result</a></span>​(<a href="../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a> r, |
| <a href="../util/mapping/Mapping.html" title="interface in org.apache.calcite.util.mapping">Mapping</a> mapping)</code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="rowColor" id="i5"> |
| <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="#trim(org.apache.calcite.rel.RelNode)">trim</a></span>​(<a href="../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a> root)</code></th> |
| <td class="colLast"> |
| <div class="block">Trims unused fields from a relational expression.</div> |
| </td> |
| </tr> |
| <tr class="altColor" id="i6"> |
| <td class="colFirst"><code>protected <a href="RelFieldTrimmer.TrimResult.html" title="class in org.apache.calcite.sql2rel">RelFieldTrimmer.TrimResult</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#trimChild(org.apache.calcite.rel.RelNode,org.apache.calcite.rel.RelNode,org.apache.calcite.util.ImmutableBitSet,java.util.Set)">trimChild</a></span>​(<a href="../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a> rel, |
| <a href="../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a> input, |
| <a href="../util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a> fieldsUsed, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util" class="externalLink">Set</a><<a href="../rel/type/RelDataTypeField.html" title="interface in org.apache.calcite.rel.type">RelDataTypeField</a>> extraFields)</code></th> |
| <td class="colLast"> |
| <div class="block">Trims the fields of an input relational expression.</div> |
| </td> |
| </tr> |
| <tr class="rowColor" id="i7"> |
| <td class="colFirst"><code>protected <a href="RelFieldTrimmer.TrimResult.html" title="class in org.apache.calcite.sql2rel">RelFieldTrimmer.TrimResult</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#trimChildRestore(org.apache.calcite.rel.RelNode,org.apache.calcite.rel.RelNode,org.apache.calcite.util.ImmutableBitSet,java.util.Set)">trimChildRestore</a></span>​(<a href="../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a> rel, |
| <a href="../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a> input, |
| <a href="../util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a> fieldsUsed, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util" class="externalLink">Set</a><<a href="../rel/type/RelDataTypeField.html" title="interface in org.apache.calcite.rel.type">RelDataTypeField</a>> extraFields)</code></th> |
| <td class="colLast"> |
| <div class="block">Trims a child relational expression, then adds back a dummy project to |
| restore the fields that were removed.</div> |
| </td> |
| </tr> |
| <tr class="altColor" id="i8"> |
| <td class="colFirst"><code><a href="RelFieldTrimmer.TrimResult.html" title="class in org.apache.calcite.sql2rel">RelFieldTrimmer.TrimResult</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#trimFields(org.apache.calcite.rel.core.Aggregate,org.apache.calcite.util.ImmutableBitSet,java.util.Set)">trimFields</a></span>​(<a href="../rel/core/Aggregate.html" title="class in org.apache.calcite.rel.core">Aggregate</a> aggregate, |
| <a href="../util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a> fieldsUsed, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util" class="externalLink">Set</a><<a href="../rel/type/RelDataTypeField.html" title="interface in org.apache.calcite.rel.type">RelDataTypeField</a>> extraFields)</code></th> |
| <td class="colLast"> |
| <div class="block">Variant of <a href="#trimFields(org.apache.calcite.rel.RelNode,org.apache.calcite.util.ImmutableBitSet,java.util.Set)"><code>trimFields(RelNode, ImmutableBitSet, Set)</code></a> for |
| <a href="../rel/logical/LogicalAggregate.html" title="class in org.apache.calcite.rel.logical"><code>LogicalAggregate</code></a>.</div> |
| </td> |
| </tr> |
| <tr class="rowColor" id="i9"> |
| <td class="colFirst"><code><a href="RelFieldTrimmer.TrimResult.html" title="class in org.apache.calcite.sql2rel">RelFieldTrimmer.TrimResult</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#trimFields(org.apache.calcite.rel.core.Calc,org.apache.calcite.util.ImmutableBitSet,java.util.Set)">trimFields</a></span>​(<a href="../rel/core/Calc.html" title="class in org.apache.calcite.rel.core">Calc</a> calc, |
| <a href="../util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a> fieldsUsed, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util" class="externalLink">Set</a><<a href="../rel/type/RelDataTypeField.html" title="interface in org.apache.calcite.rel.type">RelDataTypeField</a>> extraFields)</code></th> |
| <td class="colLast"> |
| <div class="block">Variant of <a href="#trimFields(org.apache.calcite.rel.RelNode,org.apache.calcite.util.ImmutableBitSet,java.util.Set)"><code>trimFields(RelNode, ImmutableBitSet, Set)</code></a> for |
| <a href="../rel/logical/LogicalCalc.html" title="class in org.apache.calcite.rel.logical"><code>LogicalCalc</code></a>.</div> |
| </td> |
| </tr> |
| <tr class="altColor" id="i10"> |
| <td class="colFirst"><code><a href="RelFieldTrimmer.TrimResult.html" title="class in org.apache.calcite.sql2rel">RelFieldTrimmer.TrimResult</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#trimFields(org.apache.calcite.rel.core.Exchange,org.apache.calcite.util.ImmutableBitSet,java.util.Set)">trimFields</a></span>​(<a href="../rel/core/Exchange.html" title="class in org.apache.calcite.rel.core">Exchange</a> exchange, |
| <a href="../util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a> fieldsUsed, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util" class="externalLink">Set</a><<a href="../rel/type/RelDataTypeField.html" title="interface in org.apache.calcite.rel.type">RelDataTypeField</a>> extraFields)</code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="rowColor" id="i11"> |
| <td class="colFirst"><code><a href="RelFieldTrimmer.TrimResult.html" title="class in org.apache.calcite.sql2rel">RelFieldTrimmer.TrimResult</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#trimFields(org.apache.calcite.rel.core.Filter,org.apache.calcite.util.ImmutableBitSet,java.util.Set)">trimFields</a></span>​(<a href="../rel/core/Filter.html" title="class in org.apache.calcite.rel.core">Filter</a> filter, |
| <a href="../util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a> fieldsUsed, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util" class="externalLink">Set</a><<a href="../rel/type/RelDataTypeField.html" title="interface in org.apache.calcite.rel.type">RelDataTypeField</a>> extraFields)</code></th> |
| <td class="colLast"> |
| <div class="block">Variant of <a href="#trimFields(org.apache.calcite.rel.RelNode,org.apache.calcite.util.ImmutableBitSet,java.util.Set)"><code>trimFields(RelNode, ImmutableBitSet, Set)</code></a> for |
| <a href="../rel/logical/LogicalFilter.html" title="class in org.apache.calcite.rel.logical"><code>LogicalFilter</code></a>.</div> |
| </td> |
| </tr> |
| <tr class="altColor" id="i12"> |
| <td class="colFirst"><code><a href="RelFieldTrimmer.TrimResult.html" title="class in org.apache.calcite.sql2rel">RelFieldTrimmer.TrimResult</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#trimFields(org.apache.calcite.rel.core.Join,org.apache.calcite.util.ImmutableBitSet,java.util.Set)">trimFields</a></span>​(<a href="../rel/core/Join.html" title="class in org.apache.calcite.rel.core">Join</a> join, |
| <a href="../util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a> fieldsUsed, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util" class="externalLink">Set</a><<a href="../rel/type/RelDataTypeField.html" title="interface in org.apache.calcite.rel.type">RelDataTypeField</a>> extraFields)</code></th> |
| <td class="colLast"> |
| <div class="block">Variant of <a href="#trimFields(org.apache.calcite.rel.RelNode,org.apache.calcite.util.ImmutableBitSet,java.util.Set)"><code>trimFields(RelNode, ImmutableBitSet, Set)</code></a> for |
| <a href="../rel/logical/LogicalJoin.html" title="class in org.apache.calcite.rel.logical"><code>LogicalJoin</code></a>.</div> |
| </td> |
| </tr> |
| <tr class="rowColor" id="i13"> |
| <td class="colFirst"><code><a href="RelFieldTrimmer.TrimResult.html" title="class in org.apache.calcite.sql2rel">RelFieldTrimmer.TrimResult</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#trimFields(org.apache.calcite.rel.core.Project,org.apache.calcite.util.ImmutableBitSet,java.util.Set)">trimFields</a></span>​(<a href="../rel/core/Project.html" title="class in org.apache.calcite.rel.core">Project</a> project, |
| <a href="../util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a> fieldsUsed, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util" class="externalLink">Set</a><<a href="../rel/type/RelDataTypeField.html" title="interface in org.apache.calcite.rel.type">RelDataTypeField</a>> extraFields)</code></th> |
| <td class="colLast"> |
| <div class="block">Variant of <a href="#trimFields(org.apache.calcite.rel.RelNode,org.apache.calcite.util.ImmutableBitSet,java.util.Set)"><code>trimFields(RelNode, ImmutableBitSet, Set)</code></a> for |
| <a href="../rel/logical/LogicalProject.html" title="class in org.apache.calcite.rel.logical"><code>LogicalProject</code></a>.</div> |
| </td> |
| </tr> |
| <tr class="altColor" id="i14"> |
| <td class="colFirst"><code><a href="RelFieldTrimmer.TrimResult.html" title="class in org.apache.calcite.sql2rel">RelFieldTrimmer.TrimResult</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#trimFields(org.apache.calcite.rel.core.SetOp,org.apache.calcite.util.ImmutableBitSet,java.util.Set)">trimFields</a></span>​(<a href="../rel/core/SetOp.html" title="class in org.apache.calcite.rel.core">SetOp</a> setOp, |
| <a href="../util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a> fieldsUsed, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util" class="externalLink">Set</a><<a href="../rel/type/RelDataTypeField.html" title="interface in org.apache.calcite.rel.type">RelDataTypeField</a>> extraFields)</code></th> |
| <td class="colLast"> |
| <div class="block">Variant of <a href="#trimFields(org.apache.calcite.rel.RelNode,org.apache.calcite.util.ImmutableBitSet,java.util.Set)"><code>trimFields(RelNode, ImmutableBitSet, Set)</code></a> for |
| <a href="../rel/core/SetOp.html" title="class in org.apache.calcite.rel.core"><code>SetOp</code></a> (Only UNION ALL is supported).</div> |
| </td> |
| </tr> |
| <tr class="rowColor" id="i15"> |
| <td class="colFirst"><code><a href="RelFieldTrimmer.TrimResult.html" title="class in org.apache.calcite.sql2rel">RelFieldTrimmer.TrimResult</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#trimFields(org.apache.calcite.rel.core.SortExchange,org.apache.calcite.util.ImmutableBitSet,java.util.Set)">trimFields</a></span>​(<a href="../rel/core/SortExchange.html" title="class in org.apache.calcite.rel.core">SortExchange</a> sortExchange, |
| <a href="../util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a> fieldsUsed, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util" class="externalLink">Set</a><<a href="../rel/type/RelDataTypeField.html" title="interface in org.apache.calcite.rel.type">RelDataTypeField</a>> extraFields)</code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="altColor" id="i16"> |
| <td class="colFirst"><code><a href="RelFieldTrimmer.TrimResult.html" title="class in org.apache.calcite.sql2rel">RelFieldTrimmer.TrimResult</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#trimFields(org.apache.calcite.rel.core.Sort,org.apache.calcite.util.ImmutableBitSet,java.util.Set)">trimFields</a></span>​(<a href="../rel/core/Sort.html" title="class in org.apache.calcite.rel.core">Sort</a> sort, |
| <a href="../util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a> fieldsUsed, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util" class="externalLink">Set</a><<a href="../rel/type/RelDataTypeField.html" title="interface in org.apache.calcite.rel.type">RelDataTypeField</a>> extraFields)</code></th> |
| <td class="colLast"> |
| <div class="block">Variant of <a href="#trimFields(org.apache.calcite.rel.RelNode,org.apache.calcite.util.ImmutableBitSet,java.util.Set)"><code>trimFields(RelNode, ImmutableBitSet, Set)</code></a> for |
| <a href="../rel/core/Sort.html" title="class in org.apache.calcite.rel.core"><code>Sort</code></a>.</div> |
| </td> |
| </tr> |
| <tr class="rowColor" id="i17"> |
| <td class="colFirst"><code><a href="RelFieldTrimmer.TrimResult.html" title="class in org.apache.calcite.sql2rel">RelFieldTrimmer.TrimResult</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#trimFields(org.apache.calcite.rel.core.TableScan,org.apache.calcite.util.ImmutableBitSet,java.util.Set)">trimFields</a></span>​(<a href="../rel/core/TableScan.html" title="class in org.apache.calcite.rel.core">TableScan</a> tableAccessRel, |
| <a href="../util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a> fieldsUsed, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util" class="externalLink">Set</a><<a href="../rel/type/RelDataTypeField.html" title="interface in org.apache.calcite.rel.type">RelDataTypeField</a>> extraFields)</code></th> |
| <td class="colLast"> |
| <div class="block">Variant of <a href="#trimFields(org.apache.calcite.rel.RelNode,org.apache.calcite.util.ImmutableBitSet,java.util.Set)"><code>trimFields(RelNode, ImmutableBitSet, Set)</code></a> for |
| <a href="../rel/logical/LogicalTableScan.html" title="class in org.apache.calcite.rel.logical"><code>LogicalTableScan</code></a>.</div> |
| </td> |
| </tr> |
| <tr class="altColor" id="i18"> |
| <td class="colFirst"><code><a href="RelFieldTrimmer.TrimResult.html" title="class in org.apache.calcite.sql2rel">RelFieldTrimmer.TrimResult</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#trimFields(org.apache.calcite.rel.logical.LogicalTableFunctionScan,org.apache.calcite.util.ImmutableBitSet,java.util.Set)">trimFields</a></span>​(<a href="../rel/logical/LogicalTableFunctionScan.html" title="class in org.apache.calcite.rel.logical">LogicalTableFunctionScan</a> tabFun, |
| <a href="../util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a> fieldsUsed, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util" class="externalLink">Set</a><<a href="../rel/type/RelDataTypeField.html" title="interface in org.apache.calcite.rel.type">RelDataTypeField</a>> extraFields)</code></th> |
| <td class="colLast"> |
| <div class="block">Variant of <a href="#trimFields(org.apache.calcite.rel.RelNode,org.apache.calcite.util.ImmutableBitSet,java.util.Set)"><code>trimFields(RelNode, ImmutableBitSet, Set)</code></a> for |
| <a href="../rel/logical/LogicalTableFunctionScan.html" title="class in org.apache.calcite.rel.logical"><code>LogicalTableFunctionScan</code></a>.</div> |
| </td> |
| </tr> |
| <tr class="rowColor" id="i19"> |
| <td class="colFirst"><code><a href="RelFieldTrimmer.TrimResult.html" title="class in org.apache.calcite.sql2rel">RelFieldTrimmer.TrimResult</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#trimFields(org.apache.calcite.rel.logical.LogicalTableModify,org.apache.calcite.util.ImmutableBitSet,java.util.Set)">trimFields</a></span>​(<a href="../rel/logical/LogicalTableModify.html" title="class in org.apache.calcite.rel.logical">LogicalTableModify</a> modifier, |
| <a href="../util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a> fieldsUsed, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util" class="externalLink">Set</a><<a href="../rel/type/RelDataTypeField.html" title="interface in org.apache.calcite.rel.type">RelDataTypeField</a>> extraFields)</code></th> |
| <td class="colLast"> |
| <div class="block">Variant of <a href="#trimFields(org.apache.calcite.rel.RelNode,org.apache.calcite.util.ImmutableBitSet,java.util.Set)"><code>trimFields(RelNode, ImmutableBitSet, Set)</code></a> for |
| <a href="../rel/logical/LogicalTableModify.html" title="class in org.apache.calcite.rel.logical"><code>LogicalTableModify</code></a>.</div> |
| </td> |
| </tr> |
| <tr class="altColor" id="i20"> |
| <td class="colFirst"><code><a href="RelFieldTrimmer.TrimResult.html" title="class in org.apache.calcite.sql2rel">RelFieldTrimmer.TrimResult</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#trimFields(org.apache.calcite.rel.logical.LogicalValues,org.apache.calcite.util.ImmutableBitSet,java.util.Set)">trimFields</a></span>​(<a href="../rel/logical/LogicalValues.html" title="class in org.apache.calcite.rel.logical">LogicalValues</a> values, |
| <a href="../util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a> fieldsUsed, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util" class="externalLink">Set</a><<a href="../rel/type/RelDataTypeField.html" title="interface in org.apache.calcite.rel.type">RelDataTypeField</a>> extraFields)</code></th> |
| <td class="colLast"> |
| <div class="block">Variant of <a href="#trimFields(org.apache.calcite.rel.RelNode,org.apache.calcite.util.ImmutableBitSet,java.util.Set)"><code>trimFields(RelNode, ImmutableBitSet, Set)</code></a> for |
| <a href="../rel/logical/LogicalValues.html" title="class in org.apache.calcite.rel.logical"><code>LogicalValues</code></a>.</div> |
| </td> |
| </tr> |
| <tr class="rowColor" id="i21"> |
| <td class="colFirst"><code><a href="RelFieldTrimmer.TrimResult.html" title="class in org.apache.calcite.sql2rel">RelFieldTrimmer.TrimResult</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#trimFields(org.apache.calcite.rel.RelNode,org.apache.calcite.util.ImmutableBitSet,java.util.Set)">trimFields</a></span>​(<a href="../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a> rel, |
| <a href="../util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a> fieldsUsed, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util" class="externalLink">Set</a><<a href="../rel/type/RelDataTypeField.html" title="interface in org.apache.calcite.rel.type">RelDataTypeField</a>> extraFields)</code></th> |
| <td class="colLast"> |
| <div class="block">Visit method, per <a href="../util/ReflectiveVisitor.html" title="interface in org.apache.calcite.util"><code>ReflectiveVisitor</code></a>.</div> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| </div> |
| <div class="inheritedList"> |
| <h3>Methods inherited from class java.lang.<a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a></h3> |
| <a id="methods.inherited.from.class.java.lang.Object"> |
| <!-- --> |
| </a><code><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang" class="externalLink">clone</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang" class="externalLink">equals</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang" class="externalLink">finalize</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang" class="externalLink">getClass</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang" class="externalLink">hashCode</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang" class="externalLink">notify</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang" class="externalLink">notifyAll</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang" class="externalLink">toString</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang" class="externalLink">wait</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang" class="externalLink">wait</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#wait(long,int)" title="class or interface in java.lang" class="externalLink">wait</a></code></div> |
| </section> |
| </li> |
| </ul> |
| </section> |
| <section class="details"> |
| <ul class="blockList"> |
| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
| <li class="blockList"> |
| <section class="constructorDetails"><a id="constructor.detail"> |
| <!-- --> |
| </a> |
| <h2>Constructor Details</h2> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="<init>(org.apache.calcite.sql.validate.SqlValidator,org.apache.calcite.tools.RelBuilder)">RelFieldTrimmer</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="memberName">RelFieldTrimmer</span>​(<span class="arguments">@Nullable <a href="../sql/validate/SqlValidator.html" title="interface in org.apache.calcite.sql.validate">SqlValidator</a> validator, |
| <a href="../tools/RelBuilder.html" title="class in org.apache.calcite.tools">RelBuilder</a> relBuilder)</span></div> |
| <div class="block">Creates a RelFieldTrimmer.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>validator</code> - Validator</dd> |
| </dl> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="<init>(org.apache.calcite.sql.validate.SqlValidator,org.apache.calcite.plan.RelOptCluster,org.apache.calcite.rel.core.RelFactories.ProjectFactory,org.apache.calcite.rel.core.RelFactories.FilterFactory,org.apache.calcite.rel.core.RelFactories.JoinFactory,org.apache.calcite.rel.core.RelFactories.SortFactory,org.apache.calcite.rel.core.RelFactories.AggregateFactory,org.apache.calcite.rel.core.RelFactories.SetOpFactory)">RelFieldTrimmer</a></h3> |
| <div class="memberSignature"><span class="annotations"><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang" class="externalLink">@Deprecated</a> |
| </span><span class="modifiers">public</span> <span class="memberName">RelFieldTrimmer</span>​(<span class="arguments">@Nullable <a href="../sql/validate/SqlValidator.html" title="interface in org.apache.calcite.sql.validate">SqlValidator</a> validator, |
| <a href="../plan/RelOptCluster.html" title="class in org.apache.calcite.plan">RelOptCluster</a> cluster, |
| <a href="../rel/core/RelFactories.ProjectFactory.html" title="interface in org.apache.calcite.rel.core">RelFactories.ProjectFactory</a> projectFactory, |
| <a href="../rel/core/RelFactories.FilterFactory.html" title="interface in org.apache.calcite.rel.core">RelFactories.FilterFactory</a> filterFactory, |
| <a href="../rel/core/RelFactories.JoinFactory.html" title="interface in org.apache.calcite.rel.core">RelFactories.JoinFactory</a> joinFactory, |
| <a href="../rel/core/RelFactories.SortFactory.html" title="interface in org.apache.calcite.rel.core">RelFactories.SortFactory</a> sortFactory, |
| <a href="../rel/core/RelFactories.AggregateFactory.html" title="interface in org.apache.calcite.rel.core">RelFactories.AggregateFactory</a> aggregateFactory, |
| <a href="../rel/core/RelFactories.SetOpFactory.html" title="interface in org.apache.calcite.rel.core">RelFactories.SetOpFactory</a> setOpFactory)</span></div> |
| <div class="deprecationBlock"><span class="deprecatedLabel">Deprecated.</span></div> |
| </section> |
| </li> |
| </ul> |
| </section> |
| </li> |
| <!-- ============ 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="trim(org.apache.calcite.rel.RelNode)">trim</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="returnType"><a href="../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a></span> <span class="memberName">trim</span>​(<span class="arguments"><a href="../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a> root)</span></div> |
| <div class="block">Trims unused fields from a relational expression. |
| |
| <p>We presume that all fields of the relational expression are wanted by |
| its consumer, so only trim fields that are not used within the tree.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>root</code> - Root node of relational expression</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Trimmed relational expression</dd> |
| </dl> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="trimChild(org.apache.calcite.rel.RelNode,org.apache.calcite.rel.RelNode,org.apache.calcite.util.ImmutableBitSet,java.util.Set)">trimChild</a></h3> |
| <div class="memberSignature"><span class="modifiers">protected</span> <span class="returnType"><a href="RelFieldTrimmer.TrimResult.html" title="class in org.apache.calcite.sql2rel">RelFieldTrimmer.TrimResult</a></span> <span class="memberName">trimChild</span>​(<span class="arguments"><a href="../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a> rel, |
| <a href="../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a> input, |
| <a href="../util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a> fieldsUsed, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util" class="externalLink">Set</a><<a href="../rel/type/RelDataTypeField.html" title="interface in org.apache.calcite.rel.type">RelDataTypeField</a>> extraFields)</span></div> |
| <div class="block">Trims the fields of an input relational expression.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>rel</code> - Relational expression</dd> |
| <dd><code>input</code> - Input relational expression, whose fields to trim</dd> |
| <dd><code>fieldsUsed</code> - Bitmap of fields needed by the consumer</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>New relational expression and its field mapping</dd> |
| </dl> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="trimChildRestore(org.apache.calcite.rel.RelNode,org.apache.calcite.rel.RelNode,org.apache.calcite.util.ImmutableBitSet,java.util.Set)">trimChildRestore</a></h3> |
| <div class="memberSignature"><span class="modifiers">protected</span> <span class="returnType"><a href="RelFieldTrimmer.TrimResult.html" title="class in org.apache.calcite.sql2rel">RelFieldTrimmer.TrimResult</a></span> <span class="memberName">trimChildRestore</span>​(<span class="arguments"><a href="../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a> rel, |
| <a href="../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a> input, |
| <a href="../util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a> fieldsUsed, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util" class="externalLink">Set</a><<a href="../rel/type/RelDataTypeField.html" title="interface in org.apache.calcite.rel.type">RelDataTypeField</a>> extraFields)</span></div> |
| <div class="block">Trims a child relational expression, then adds back a dummy project to |
| restore the fields that were removed. |
| |
| <p>Sounds pointless? It causes unused fields to be removed |
| further down the tree (towards the leaves), but it ensure that the |
| consuming relational expression continues to see the same fields.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>rel</code> - Relational expression</dd> |
| <dd><code>input</code> - Input relational expression, whose fields to trim</dd> |
| <dd><code>fieldsUsed</code> - Bitmap of fields needed by the consumer</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>New relational expression and its field mapping</dd> |
| </dl> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="dispatchTrimFields(org.apache.calcite.rel.RelNode,org.apache.calcite.util.ImmutableBitSet,java.util.Set)">dispatchTrimFields</a></h3> |
| <div class="memberSignature"><span class="modifiers">protected final</span> <span class="returnType"><a href="RelFieldTrimmer.TrimResult.html" title="class in org.apache.calcite.sql2rel">RelFieldTrimmer.TrimResult</a></span> <span class="memberName">dispatchTrimFields</span>​(<span class="arguments"><a href="../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a> rel, |
| <a href="../util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a> fieldsUsed, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util" class="externalLink">Set</a><<a href="../rel/type/RelDataTypeField.html" title="interface in org.apache.calcite.rel.type">RelDataTypeField</a>> extraFields)</span></div> |
| <div class="block">Invokes <a href="#trimFields(org.apache.calcite.rel.RelNode,org.apache.calcite.util.ImmutableBitSet,java.util.Set)"><code>trimFields(org.apache.calcite.rel.RelNode, org.apache.calcite.util.ImmutableBitSet, java.util.Set<org.apache.calcite.rel.type.RelDataTypeField>)</code></a>, or the appropriate method for the type |
| of the rel parameter, using multi-method dispatch.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>rel</code> - Relational expression</dd> |
| <dd><code>fieldsUsed</code> - Bitmap of fields needed by the consumer</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>New relational expression and its field mapping</dd> |
| </dl> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="result(org.apache.calcite.rel.RelNode,org.apache.calcite.util.mapping.Mapping)">result</a></h3> |
| <div class="memberSignature"><span class="modifiers">protected</span> <span class="returnType"><a href="RelFieldTrimmer.TrimResult.html" title="class in org.apache.calcite.sql2rel">RelFieldTrimmer.TrimResult</a></span> <span class="memberName">result</span>​(<span class="arguments"><a href="../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a> r, |
| <a href="../util/mapping/Mapping.html" title="interface in org.apache.calcite.util.mapping">Mapping</a> mapping)</span></div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="trimFields(org.apache.calcite.rel.RelNode,org.apache.calcite.util.ImmutableBitSet,java.util.Set)">trimFields</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="returnType"><a href="RelFieldTrimmer.TrimResult.html" title="class in org.apache.calcite.sql2rel">RelFieldTrimmer.TrimResult</a></span> <span class="memberName">trimFields</span>​(<span class="arguments"><a href="../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a> rel, |
| <a href="../util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a> fieldsUsed, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util" class="externalLink">Set</a><<a href="../rel/type/RelDataTypeField.html" title="interface in org.apache.calcite.rel.type">RelDataTypeField</a>> extraFields)</span></div> |
| <div class="block">Visit method, per <a href="../util/ReflectiveVisitor.html" title="interface in org.apache.calcite.util"><code>ReflectiveVisitor</code></a>. |
| |
| <p>This method is invoked reflectively, so there may not be any apparent |
| calls to it. The class (or derived classes) may contain overloads of |
| this method with more specific types for the <code>rel</code> parameter. |
| |
| <p>Returns a pair: the relational expression created, and the mapping |
| between the original fields and the fields of the newly created |
| relational expression.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>rel</code> - Relational expression</dd> |
| <dd><code>fieldsUsed</code> - Fields needed by the consumer</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>relational expression and mapping</dd> |
| </dl> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="trimFields(org.apache.calcite.rel.core.Calc,org.apache.calcite.util.ImmutableBitSet,java.util.Set)">trimFields</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="returnType"><a href="RelFieldTrimmer.TrimResult.html" title="class in org.apache.calcite.sql2rel">RelFieldTrimmer.TrimResult</a></span> <span class="memberName">trimFields</span>​(<span class="arguments"><a href="../rel/core/Calc.html" title="class in org.apache.calcite.rel.core">Calc</a> calc, |
| <a href="../util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a> fieldsUsed, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util" class="externalLink">Set</a><<a href="../rel/type/RelDataTypeField.html" title="interface in org.apache.calcite.rel.type">RelDataTypeField</a>> extraFields)</span></div> |
| <div class="block">Variant of <a href="#trimFields(org.apache.calcite.rel.RelNode,org.apache.calcite.util.ImmutableBitSet,java.util.Set)"><code>trimFields(RelNode, ImmutableBitSet, Set)</code></a> for |
| <a href="../rel/logical/LogicalCalc.html" title="class in org.apache.calcite.rel.logical"><code>LogicalCalc</code></a>.</div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="trimFields(org.apache.calcite.rel.core.Project,org.apache.calcite.util.ImmutableBitSet,java.util.Set)">trimFields</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="returnType"><a href="RelFieldTrimmer.TrimResult.html" title="class in org.apache.calcite.sql2rel">RelFieldTrimmer.TrimResult</a></span> <span class="memberName">trimFields</span>​(<span class="arguments"><a href="../rel/core/Project.html" title="class in org.apache.calcite.rel.core">Project</a> project, |
| <a href="../util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a> fieldsUsed, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util" class="externalLink">Set</a><<a href="../rel/type/RelDataTypeField.html" title="interface in org.apache.calcite.rel.type">RelDataTypeField</a>> extraFields)</span></div> |
| <div class="block">Variant of <a href="#trimFields(org.apache.calcite.rel.RelNode,org.apache.calcite.util.ImmutableBitSet,java.util.Set)"><code>trimFields(RelNode, ImmutableBitSet, Set)</code></a> for |
| <a href="../rel/logical/LogicalProject.html" title="class in org.apache.calcite.rel.logical"><code>LogicalProject</code></a>.</div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="dummyProject(int,org.apache.calcite.rel.RelNode)">dummyProject</a></h3> |
| <div class="memberSignature"><span class="modifiers">protected</span> <span class="returnType"><a href="RelFieldTrimmer.TrimResult.html" title="class in org.apache.calcite.sql2rel">RelFieldTrimmer.TrimResult</a></span> <span class="memberName">dummyProject</span>​(<span class="arguments">int fieldCount, |
| <a href="../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a> input)</span></div> |
| <div class="block">Creates a project with a dummy column, to protect the parts of the system |
| that cannot handle a relational expression with no columns.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>fieldCount</code> - Number of fields in the original relational expression</dd> |
| <dd><code>input</code> - Trimmed input</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Dummy project</dd> |
| </dl> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="dummyProject(int,org.apache.calcite.rel.RelNode,org.apache.calcite.rel.RelNode)">dummyProject</a></h3> |
| <div class="memberSignature"><span class="modifiers">protected</span> <span class="returnType"><a href="RelFieldTrimmer.TrimResult.html" title="class in org.apache.calcite.sql2rel">RelFieldTrimmer.TrimResult</a></span> <span class="memberName">dummyProject</span>​(<span class="arguments">int fieldCount, |
| <a href="../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a> input, |
| @Nullable <a href="../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a> originalRelNode)</span></div> |
| <div class="block">Creates a project with a dummy column, to protect the parts of the system |
| that cannot handle a relational expression with no columns.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>fieldCount</code> - Number of fields in the original relational expression</dd> |
| <dd><code>input</code> - Trimmed input</dd> |
| <dd><code>originalRelNode</code> - Source RelNode for hint propagation (or null if no propagation needed)</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Dummy project</dd> |
| </dl> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="trimFields(org.apache.calcite.rel.core.Filter,org.apache.calcite.util.ImmutableBitSet,java.util.Set)">trimFields</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="returnType"><a href="RelFieldTrimmer.TrimResult.html" title="class in org.apache.calcite.sql2rel">RelFieldTrimmer.TrimResult</a></span> <span class="memberName">trimFields</span>​(<span class="arguments"><a href="../rel/core/Filter.html" title="class in org.apache.calcite.rel.core">Filter</a> filter, |
| <a href="../util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a> fieldsUsed, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util" class="externalLink">Set</a><<a href="../rel/type/RelDataTypeField.html" title="interface in org.apache.calcite.rel.type">RelDataTypeField</a>> extraFields)</span></div> |
| <div class="block">Variant of <a href="#trimFields(org.apache.calcite.rel.RelNode,org.apache.calcite.util.ImmutableBitSet,java.util.Set)"><code>trimFields(RelNode, ImmutableBitSet, Set)</code></a> for |
| <a href="../rel/logical/LogicalFilter.html" title="class in org.apache.calcite.rel.logical"><code>LogicalFilter</code></a>.</div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="trimFields(org.apache.calcite.rel.core.Sort,org.apache.calcite.util.ImmutableBitSet,java.util.Set)">trimFields</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="returnType"><a href="RelFieldTrimmer.TrimResult.html" title="class in org.apache.calcite.sql2rel">RelFieldTrimmer.TrimResult</a></span> <span class="memberName">trimFields</span>​(<span class="arguments"><a href="../rel/core/Sort.html" title="class in org.apache.calcite.rel.core">Sort</a> sort, |
| <a href="../util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a> fieldsUsed, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util" class="externalLink">Set</a><<a href="../rel/type/RelDataTypeField.html" title="interface in org.apache.calcite.rel.type">RelDataTypeField</a>> extraFields)</span></div> |
| <div class="block">Variant of <a href="#trimFields(org.apache.calcite.rel.RelNode,org.apache.calcite.util.ImmutableBitSet,java.util.Set)"><code>trimFields(RelNode, ImmutableBitSet, Set)</code></a> for |
| <a href="../rel/core/Sort.html" title="class in org.apache.calcite.rel.core"><code>Sort</code></a>.</div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="trimFields(org.apache.calcite.rel.core.Exchange,org.apache.calcite.util.ImmutableBitSet,java.util.Set)">trimFields</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="returnType"><a href="RelFieldTrimmer.TrimResult.html" title="class in org.apache.calcite.sql2rel">RelFieldTrimmer.TrimResult</a></span> <span class="memberName">trimFields</span>​(<span class="arguments"><a href="../rel/core/Exchange.html" title="class in org.apache.calcite.rel.core">Exchange</a> exchange, |
| <a href="../util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a> fieldsUsed, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util" class="externalLink">Set</a><<a href="../rel/type/RelDataTypeField.html" title="interface in org.apache.calcite.rel.type">RelDataTypeField</a>> extraFields)</span></div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="trimFields(org.apache.calcite.rel.core.SortExchange,org.apache.calcite.util.ImmutableBitSet,java.util.Set)">trimFields</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="returnType"><a href="RelFieldTrimmer.TrimResult.html" title="class in org.apache.calcite.sql2rel">RelFieldTrimmer.TrimResult</a></span> <span class="memberName">trimFields</span>​(<span class="arguments"><a href="../rel/core/SortExchange.html" title="class in org.apache.calcite.rel.core">SortExchange</a> sortExchange, |
| <a href="../util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a> fieldsUsed, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util" class="externalLink">Set</a><<a href="../rel/type/RelDataTypeField.html" title="interface in org.apache.calcite.rel.type">RelDataTypeField</a>> extraFields)</span></div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="trimFields(org.apache.calcite.rel.core.Join,org.apache.calcite.util.ImmutableBitSet,java.util.Set)">trimFields</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="returnType"><a href="RelFieldTrimmer.TrimResult.html" title="class in org.apache.calcite.sql2rel">RelFieldTrimmer.TrimResult</a></span> <span class="memberName">trimFields</span>​(<span class="arguments"><a href="../rel/core/Join.html" title="class in org.apache.calcite.rel.core">Join</a> join, |
| <a href="../util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a> fieldsUsed, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util" class="externalLink">Set</a><<a href="../rel/type/RelDataTypeField.html" title="interface in org.apache.calcite.rel.type">RelDataTypeField</a>> extraFields)</span></div> |
| <div class="block">Variant of <a href="#trimFields(org.apache.calcite.rel.RelNode,org.apache.calcite.util.ImmutableBitSet,java.util.Set)"><code>trimFields(RelNode, ImmutableBitSet, Set)</code></a> for |
| <a href="../rel/logical/LogicalJoin.html" title="class in org.apache.calcite.rel.logical"><code>LogicalJoin</code></a>.</div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="trimFields(org.apache.calcite.rel.core.SetOp,org.apache.calcite.util.ImmutableBitSet,java.util.Set)">trimFields</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="returnType"><a href="RelFieldTrimmer.TrimResult.html" title="class in org.apache.calcite.sql2rel">RelFieldTrimmer.TrimResult</a></span> <span class="memberName">trimFields</span>​(<span class="arguments"><a href="../rel/core/SetOp.html" title="class in org.apache.calcite.rel.core">SetOp</a> setOp, |
| <a href="../util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a> fieldsUsed, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util" class="externalLink">Set</a><<a href="../rel/type/RelDataTypeField.html" title="interface in org.apache.calcite.rel.type">RelDataTypeField</a>> extraFields)</span></div> |
| <div class="block">Variant of <a href="#trimFields(org.apache.calcite.rel.RelNode,org.apache.calcite.util.ImmutableBitSet,java.util.Set)"><code>trimFields(RelNode, ImmutableBitSet, Set)</code></a> for |
| <a href="../rel/core/SetOp.html" title="class in org.apache.calcite.rel.core"><code>SetOp</code></a> (Only UNION ALL is supported).</div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="trimFields(org.apache.calcite.rel.core.Aggregate,org.apache.calcite.util.ImmutableBitSet,java.util.Set)">trimFields</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="returnType"><a href="RelFieldTrimmer.TrimResult.html" title="class in org.apache.calcite.sql2rel">RelFieldTrimmer.TrimResult</a></span> <span class="memberName">trimFields</span>​(<span class="arguments"><a href="../rel/core/Aggregate.html" title="class in org.apache.calcite.rel.core">Aggregate</a> aggregate, |
| <a href="../util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a> fieldsUsed, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util" class="externalLink">Set</a><<a href="../rel/type/RelDataTypeField.html" title="interface in org.apache.calcite.rel.type">RelDataTypeField</a>> extraFields)</span></div> |
| <div class="block">Variant of <a href="#trimFields(org.apache.calcite.rel.RelNode,org.apache.calcite.util.ImmutableBitSet,java.util.Set)"><code>trimFields(RelNode, ImmutableBitSet, Set)</code></a> for |
| <a href="../rel/logical/LogicalAggregate.html" title="class in org.apache.calcite.rel.logical"><code>LogicalAggregate</code></a>.</div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="trimFields(org.apache.calcite.rel.logical.LogicalTableModify,org.apache.calcite.util.ImmutableBitSet,java.util.Set)">trimFields</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="returnType"><a href="RelFieldTrimmer.TrimResult.html" title="class in org.apache.calcite.sql2rel">RelFieldTrimmer.TrimResult</a></span> <span class="memberName">trimFields</span>​(<span class="arguments"><a href="../rel/logical/LogicalTableModify.html" title="class in org.apache.calcite.rel.logical">LogicalTableModify</a> modifier, |
| <a href="../util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a> fieldsUsed, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util" class="externalLink">Set</a><<a href="../rel/type/RelDataTypeField.html" title="interface in org.apache.calcite.rel.type">RelDataTypeField</a>> extraFields)</span></div> |
| <div class="block">Variant of <a href="#trimFields(org.apache.calcite.rel.RelNode,org.apache.calcite.util.ImmutableBitSet,java.util.Set)"><code>trimFields(RelNode, ImmutableBitSet, Set)</code></a> for |
| <a href="../rel/logical/LogicalTableModify.html" title="class in org.apache.calcite.rel.logical"><code>LogicalTableModify</code></a>.</div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="trimFields(org.apache.calcite.rel.logical.LogicalTableFunctionScan,org.apache.calcite.util.ImmutableBitSet,java.util.Set)">trimFields</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="returnType"><a href="RelFieldTrimmer.TrimResult.html" title="class in org.apache.calcite.sql2rel">RelFieldTrimmer.TrimResult</a></span> <span class="memberName">trimFields</span>​(<span class="arguments"><a href="../rel/logical/LogicalTableFunctionScan.html" title="class in org.apache.calcite.rel.logical">LogicalTableFunctionScan</a> tabFun, |
| <a href="../util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a> fieldsUsed, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util" class="externalLink">Set</a><<a href="../rel/type/RelDataTypeField.html" title="interface in org.apache.calcite.rel.type">RelDataTypeField</a>> extraFields)</span></div> |
| <div class="block">Variant of <a href="#trimFields(org.apache.calcite.rel.RelNode,org.apache.calcite.util.ImmutableBitSet,java.util.Set)"><code>trimFields(RelNode, ImmutableBitSet, Set)</code></a> for |
| <a href="../rel/logical/LogicalTableFunctionScan.html" title="class in org.apache.calcite.rel.logical"><code>LogicalTableFunctionScan</code></a>.</div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="trimFields(org.apache.calcite.rel.logical.LogicalValues,org.apache.calcite.util.ImmutableBitSet,java.util.Set)">trimFields</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="returnType"><a href="RelFieldTrimmer.TrimResult.html" title="class in org.apache.calcite.sql2rel">RelFieldTrimmer.TrimResult</a></span> <span class="memberName">trimFields</span>​(<span class="arguments"><a href="../rel/logical/LogicalValues.html" title="class in org.apache.calcite.rel.logical">LogicalValues</a> values, |
| <a href="../util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a> fieldsUsed, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util" class="externalLink">Set</a><<a href="../rel/type/RelDataTypeField.html" title="interface in org.apache.calcite.rel.type">RelDataTypeField</a>> extraFields)</span></div> |
| <div class="block">Variant of <a href="#trimFields(org.apache.calcite.rel.RelNode,org.apache.calcite.util.ImmutableBitSet,java.util.Set)"><code>trimFields(RelNode, ImmutableBitSet, Set)</code></a> for |
| <a href="../rel/logical/LogicalValues.html" title="class in org.apache.calcite.rel.logical"><code>LogicalValues</code></a>.</div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="createMapping(org.apache.calcite.util.ImmutableBitSet,int)">createMapping</a></h3> |
| <div class="memberSignature"><span class="modifiers">protected</span> <span class="returnType"><a href="../util/mapping/Mapping.html" title="interface in org.apache.calcite.util.mapping">Mapping</a></span> <span class="memberName">createMapping</span>​(<span class="arguments"><a href="../util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a> fieldsUsed, |
| int fieldCount)</span></div> |
| </section> |
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| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="trimFields(org.apache.calcite.rel.core.TableScan,org.apache.calcite.util.ImmutableBitSet,java.util.Set)">trimFields</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="returnType"><a href="RelFieldTrimmer.TrimResult.html" title="class in org.apache.calcite.sql2rel">RelFieldTrimmer.TrimResult</a></span> <span class="memberName">trimFields</span>​(<span class="arguments"><a href="../rel/core/TableScan.html" title="class in org.apache.calcite.rel.core">TableScan</a> tableAccessRel, |
| <a href="../util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a> fieldsUsed, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util" class="externalLink">Set</a><<a href="../rel/type/RelDataTypeField.html" title="interface in org.apache.calcite.rel.type">RelDataTypeField</a>> extraFields)</span></div> |
| <div class="block">Variant of <a href="#trimFields(org.apache.calcite.rel.RelNode,org.apache.calcite.util.ImmutableBitSet,java.util.Set)"><code>trimFields(RelNode, ImmutableBitSet, Set)</code></a> for |
| <a href="../rel/logical/LogicalTableScan.html" title="class in org.apache.calcite.rel.logical"><code>LogicalTableScan</code></a>.</div> |
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