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| <h1 title="程序包" class="title">程序包 org.apache.calcite.rel</h1> |
| <div class="docSummary"> |
| <div class="block">Defines relational expressions.</div> |
| </div> |
| <p>请参阅: <a href="#package.description">说明</a></p> |
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| <table class="typeSummary" border="0" cellpadding="3" cellspacing="0" summary="接口概要表, 列表接口和解释"> |
| <caption><span>接口概要</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">接口</th> |
| <th class="colLast" scope="col">说明</th> |
| </tr> |
| <tbody> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../org/apache/calcite/rel/RelCollation.html" title="org.apache.calcite.rel中的接口">RelCollation</a></td> |
| <td class="colLast"> |
| <div class="block">Description of the physical ordering of a relational expression.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><a href="../../../../org/apache/calcite/rel/RelDistribution.html" title="org.apache.calcite.rel中的接口">RelDistribution</a></td> |
| <td class="colLast"> |
| <div class="block">Description of the physical distribution of a relational expression.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../org/apache/calcite/rel/RelInput.html" title="org.apache.calcite.rel中的接口">RelInput</a></td> |
| <td class="colLast"> |
| <div class="block">Context from which a relational expression can initialize itself, |
| reading from a serialized form of the relational expression.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><a href="../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a></td> |
| <td class="colLast"> |
| <div class="block">A <code>RelNode</code> is a relational expression.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../org/apache/calcite/rel/RelNode.Context.html" title="org.apache.calcite.rel中的接口">RelNode.Context</a></td> |
| <td class="colLast"> |
| <div class="block">Context of a relational expression, for purposes of checking validity.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><a href="../../../../org/apache/calcite/rel/RelReferentialConstraint.html" title="org.apache.calcite.rel中的接口">RelReferentialConstraint</a></td> |
| <td class="colLast"> |
| <div class="block">Interface for a referential constraint, i.e., Foreign-Key - Unique-Key relationship, |
| between two tables.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../org/apache/calcite/rel/RelShuttle.html" title="org.apache.calcite.rel中的接口">RelShuttle</a></td> |
| <td class="colLast"> |
| <div class="block">Visitor that has methods for the common logical relational expressions.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><a href="../../../../org/apache/calcite/rel/RelWriter.html" title="org.apache.calcite.rel中的接口">RelWriter</a></td> |
| <td class="colLast"> |
| <div class="block">Callback for an expression to dump itself to.</div> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
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| <table class="typeSummary" border="0" cellpadding="3" cellspacing="0" summary="类概要表, 列表类和解释"> |
| <caption><span>类概要</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">类</th> |
| <th class="colLast" scope="col">说明</th> |
| </tr> |
| <tbody> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../org/apache/calcite/rel/AbstractRelNode.html" title="org.apache.calcite.rel中的类">AbstractRelNode</a></td> |
| <td class="colLast"> |
| <div class="block">Base class for every relational expression (<a href="../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口"><code>RelNode</code></a>).</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><a href="../../../../org/apache/calcite/rel/BiRel.html" title="org.apache.calcite.rel中的类">BiRel</a></td> |
| <td class="colLast"> |
| <div class="block">Abstract base class for relational expressions with a two inputs.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../org/apache/calcite/rel/RelCollationImpl.html" title="org.apache.calcite.rel中的类">RelCollationImpl</a></td> |
| <td class="colLast"> |
| <div class="block">Simple implementation of <a href="../../../../org/apache/calcite/rel/RelCollation.html" title="org.apache.calcite.rel中的接口"><code>RelCollation</code></a>.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><a href="../../../../org/apache/calcite/rel/RelCollations.html" title="org.apache.calcite.rel中的类">RelCollations</a></td> |
| <td class="colLast"> |
| <div class="block">Utilities concerning <a href="../../../../org/apache/calcite/rel/RelCollation.html" title="org.apache.calcite.rel中的接口"><code>RelCollation</code></a> |
| and <a href="../../../../org/apache/calcite/rel/RelFieldCollation.html" title="org.apache.calcite.rel中的类"><code>RelFieldCollation</code></a>.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../org/apache/calcite/rel/RelCollationTraitDef.html" title="org.apache.calcite.rel中的类">RelCollationTraitDef</a></td> |
| <td class="colLast"> |
| <div class="block">Definition of the ordering trait.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><a href="../../../../org/apache/calcite/rel/RelDistributions.html" title="org.apache.calcite.rel中的类">RelDistributions</a></td> |
| <td class="colLast"> |
| <div class="block">Utilities concerning <a href="../../../../org/apache/calcite/rel/RelDistribution.html" title="org.apache.calcite.rel中的接口"><code>RelDistribution</code></a>.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../org/apache/calcite/rel/RelDistributionTraitDef.html" title="org.apache.calcite.rel中的类">RelDistributionTraitDef</a></td> |
| <td class="colLast"> |
| <div class="block">Definition of the distribution trait.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><a href="../../../../org/apache/calcite/rel/RelFieldCollation.html" title="org.apache.calcite.rel中的类">RelFieldCollation</a></td> |
| <td class="colLast"> |
| <div class="block">Definition of the ordering of one field of a <a href="../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口"><code>RelNode</code></a> whose |
| output is to be sorted.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../org/apache/calcite/rel/RelHomogeneousShuttle.html" title="org.apache.calcite.rel中的类">RelHomogeneousShuttle</a></td> |
| <td class="colLast"> |
| <div class="block">Visits all the relations in a homogeneous way: always redirects calls to |
| <code>accept(RelNode)</code>.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><a href="../../../../org/apache/calcite/rel/RelNodes.html" title="org.apache.calcite.rel中的类">RelNodes</a></td> |
| <td class="colLast"> |
| <div class="block">Utilities concerning relational expressions.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../org/apache/calcite/rel/RelReferentialConstraintImpl.html" title="org.apache.calcite.rel中的类">RelReferentialConstraintImpl</a></td> |
| <td class="colLast"> |
| <div class="block">RelOptReferentialConstraint base implementation.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><a href="../../../../org/apache/calcite/rel/RelRoot.html" title="org.apache.calcite.rel中的类">RelRoot</a></td> |
| <td class="colLast"> |
| <div class="block">Root of a tree of <a href="../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口"><code>RelNode</code></a>.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../org/apache/calcite/rel/RelShuttleImpl.html" title="org.apache.calcite.rel中的类">RelShuttleImpl</a></td> |
| <td class="colLast"> |
| <div class="block">Basic implementation of <a href="../../../../org/apache/calcite/rel/RelShuttle.html" title="org.apache.calcite.rel中的接口"><code>RelShuttle</code></a> that calls |
| <a href="../../../../org/apache/calcite/rel/RelNode.html#accept-org.apache.calcite.rel.RelShuttle-"><code>RelNode.accept(RelShuttle)</code></a> on each child, and |
| <a href="../../../../org/apache/calcite/rel/RelNode.html#copy-org.apache.calcite.plan.RelTraitSet-java.util.List-"><code>RelNode.copy(org.apache.calcite.plan.RelTraitSet, java.util.List)</code></a> if |
| any children change.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><a href="../../../../org/apache/calcite/rel/RelVisitor.html" title="org.apache.calcite.rel中的类">RelVisitor</a></td> |
| <td class="colLast"> |
| <div class="block">A <code>RelVisitor</code> is a Visitor role in the |
| <a href="../../../../org/apache/calcite/util/Glossary.html#VISITOR_PATTERN"><code>visitor pattern</code></a> and |
| visits <a href="../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口"><code>RelNode</code></a> objects as the role of Element.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../org/apache/calcite/rel/SingleRel.html" title="org.apache.calcite.rel中的类">SingleRel</a></td> |
| <td class="colLast"> |
| <div class="block">Abstract base class for relational expressions with a single input.</div> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </li> |
| <li class="blockList"> |
| <table class="typeSummary" border="0" cellpadding="3" cellspacing="0" summary="枚举概要表, 列表枚举和解释"> |
| <caption><span>枚举概要</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">枚举</th> |
| <th class="colLast" scope="col">说明</th> |
| </tr> |
| <tbody> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../org/apache/calcite/rel/RelDistribution.Type.html" title="org.apache.calcite.rel中的枚举">RelDistribution.Type</a></td> |
| <td class="colLast"> |
| <div class="block">Type of distribution.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><a href="../../../../org/apache/calcite/rel/RelFieldCollation.Direction.html" title="org.apache.calcite.rel中的枚举">RelFieldCollation.Direction</a></td> |
| <td class="colLast"> |
| <div class="block">Direction that a field is ordered in.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../org/apache/calcite/rel/RelFieldCollation.NullDirection.html" title="org.apache.calcite.rel中的枚举">RelFieldCollation.NullDirection</a></td> |
| <td class="colLast"> |
| <div class="block">Ordering of nulls.</div> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </li> |
| <li class="blockList"> |
| <table class="typeSummary" border="0" cellpadding="3" cellspacing="0" summary="异常错误概要表, 列表异常错误和解释"> |
| <caption><span>异常错误概要</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">异常错误</th> |
| <th class="colLast" scope="col">说明</th> |
| </tr> |
| <tbody> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../org/apache/calcite/rel/InvalidRelException.html" title="org.apache.calcite.rel中的类">InvalidRelException</a></td> |
| <td class="colLast"> |
| <div class="block">Exception that indicates that a relational expression would be invalid |
| with given parameters.</div> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </li> |
| </ul> |
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| <h2 title="程序包org.apache.calcite.rel的说明">程序包org.apache.calcite.rel的说明</h2> |
| <div class="block">Defines relational expressions. |
| |
| <h2>Related packages and classes</h2> |
| <ul> |
| |
| <li>Package <code> |
| <a href="../sql/package-summary.html">org.apache.calcite.sql</a></code> |
| is an object model for SQL expressions |
| |
| <li>Package <code> |
| <a href="../sql/package-summary.html">org.apache.calcite.rex</a></code> |
| is an object model for relational row expressions |
| |
| <li>Package <code> |
| <a href="../plan/package-summary.html">org.apache.calcite.plan</a></code> |
| provides an optimizer interface. |
| |
| </ul></div> |
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