| <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> |
| <!-- NewPage --> |
| <html lang="en"> |
| <head> |
| <!-- Generated by javadoc --> |
| <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> |
| <title>ReduceDecimalsRule (Apache Calcite calcite API)</title> |
| <link rel="stylesheet" type="text/css" href="../../../../../stylesheet.css" title="Style"> |
| <script type="text/javascript" src="../../../../../script.js"></script> |
| </head> |
| <body> |
| <script type="text/javascript"><!-- |
| try { |
| if (location.href.indexOf('is-external=true') == -1) { |
| parent.document.title="ReduceDecimalsRule (Apache Calcite calcite API)"; |
| } |
| } |
| catch(err) { |
| } |
| //--> |
| var methods = {"i0":10,"i1":10}; |
| var tabs = {65535:["t0","All Methods"],2:["t2","Instance Methods"],8:["t4","Concrete Methods"]}; |
| var altColor = "altColor"; |
| var rowColor = "rowColor"; |
| var tableTab = "tableTab"; |
| var activeTableTab = "activeTableTab"; |
| </script> |
| <noscript> |
| <div>JavaScript is disabled on your browser.</div> |
| </noscript> |
| <!-- ========= START OF TOP NAVBAR ======= --> |
| <div class="topNav"><a name="navbar.top"> |
| <!-- --> |
| </a> |
| <div class="skipNav"><a href="#skip.navbar.top" title="Skip navigation links">Skip navigation links</a></div> |
| <a name="navbar.top.firstrow"> |
| <!-- --> |
| </a> |
| <ul class="navList" title="Navigation"> |
| <li><a href="../../../../../overview-summary.html">Overview</a></li> |
| <li><a href="package-summary.html">Package</a></li> |
| <li class="navBarCell1Rev">Class</li> |
| <li><a href="package-tree.html">Tree</a></li> |
| <li><a href="../../../../../deprecated-list.html">Deprecated</a></li> |
| <li><a href="../../../../../index-all.html">Index</a></li> |
| <li><a href="../../../../../help-doc.html">Help</a></li> |
| </ul> |
| <div class="aboutLanguage"><b>Apache Calcite</b></div> |
| </div> |
| <div class="subNav"> |
| <ul class="navList"> |
| <li><a href="../../../../../org/apache/calcite/rel/rules/PushProjector.ExprCondition.html" title="interface in org.apache.calcite.rel.rules"><span class="typeNameLink">Prev Class</span></a></li> |
| <li><a href="../../../../../org/apache/calcite/rel/rules/ReduceDecimalsRule.DecimalShuttle.html" title="class in org.apache.calcite.rel.rules"><span class="typeNameLink">Next Class</span></a></li> |
| </ul> |
| <ul class="navList"> |
| <li><a href="../../../../../index.html?org/apache/calcite/rel/rules/ReduceDecimalsRule.html" target="_top">Frames</a></li> |
| <li><a href="ReduceDecimalsRule.html" target="_top">No Frames</a></li> |
| </ul> |
| <ul class="navList" id="allclasses_navbar_top"> |
| <li><a href="../../../../../allclasses-noframe.html">All Classes</a></li> |
| </ul> |
| <div> |
| <script type="text/javascript"><!-- |
| allClassesLink = document.getElementById("allclasses_navbar_top"); |
| if(window==top) { |
| allClassesLink.style.display = "block"; |
| } |
| else { |
| allClassesLink.style.display = "none"; |
| } |
| //--> |
| </script> |
| </div> |
| <div> |
| <ul class="subNavList"> |
| <li>Summary: </li> |
| <li><a href="#nested.class.summary">Nested</a> | </li> |
| <li><a href="#field.summary">Field</a> | </li> |
| <li><a href="#constructor.summary">Constr</a> | </li> |
| <li><a href="#method.summary">Method</a></li> |
| </ul> |
| <ul class="subNavList"> |
| <li>Detail: </li> |
| <li><a href="#field.detail">Field</a> | </li> |
| <li><a href="#constructor.detail">Constr</a> | </li> |
| <li><a href="#method.detail">Method</a></li> |
| </ul> |
| </div> |
| <a name="skip.navbar.top"> |
| <!-- --> |
| </a></div> |
| <!-- ========= END OF TOP NAVBAR ========= --> |
| <!-- ======== START OF CLASS DATA ======== --> |
| <div class="header"> |
| <div class="subTitle">org.apache.calcite.rel.rules</div> |
| <h2 title="Class ReduceDecimalsRule" class="title">Class ReduceDecimalsRule</h2> |
| </div> |
| <div class="contentContainer"> |
| <ul class="inheritance"> |
| <li><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li><a href="../../../../../org/apache/calcite/plan/RelOptRule.html" title="class in org.apache.calcite.plan">org.apache.calcite.plan.RelOptRule</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li>org.apache.calcite.rel.rules.ReduceDecimalsRule</li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| <div class="description"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <dl> |
| <dt>All Implemented Interfaces:</dt> |
| <dd><a href="../../../../../org/apache/calcite/rel/rules/TransformationRule.html" title="interface in org.apache.calcite.rel.rules">TransformationRule</a></dd> |
| </dl> |
| <hr> |
| <br> |
| <pre>public class <span class="typeNameLabel">ReduceDecimalsRule</span> |
| extends <a href="../../../../../org/apache/calcite/plan/RelOptRule.html" title="class in org.apache.calcite.plan">RelOptRule</a> |
| implements <a href="../../../../../org/apache/calcite/rel/rules/TransformationRule.html" title="interface in org.apache.calcite.rel.rules">TransformationRule</a></pre> |
| <div class="block">ReduceDecimalsRule is a rule which reduces decimal operations (such as casts |
| or arithmetic) into operations involving more primitive types (such as longs |
| and doubles). The rule allows Calcite implementations to deal with decimals |
| in a consistent manner, while saving the effort of implementing them. |
| |
| <p>The rule can be applied to a |
| <a href="../../../../../org/apache/calcite/rel/logical/LogicalCalc.html" title="class in org.apache.calcite.rel.logical"><code>LogicalCalc</code></a> with a program for which |
| <a href="../../../../../org/apache/calcite/rex/RexUtil.html#requiresDecimalExpansion-org.apache.calcite.rex.RexNode-boolean-"><code>RexUtil.requiresDecimalExpansion(org.apache.calcite.rex.RexNode, boolean)</code></a> returns true. The rule relies on a |
| <a href="../../../../../org/apache/calcite/rex/RexShuttle.html" title="class in org.apache.calcite.rex"><code>RexShuttle</code></a> to walk over relational expressions and replace them. |
| |
| <p>While decimals are generally not implemented by the Calcite runtime, the |
| rule is optionally applied, in order to support the situation in which we |
| would like to push down decimal operations to an external database.</div> |
| </li> |
| </ul> |
| </div> |
| <div class="summary"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <!-- ======== NESTED CLASS SUMMARY ======== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="nested.class.summary"> |
| <!-- --> |
| </a> |
| <h3>Nested Class Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Nested Class Summary table, listing nested classes, and an explanation"> |
| <caption><span>Nested Classes</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Class and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/rules/ReduceDecimalsRule.DecimalShuttle.html" title="class in org.apache.calcite.rel.rules">ReduceDecimalsRule.DecimalShuttle</a></span></code> |
| <div class="block">A shuttle which converts decimal expressions to expressions based on |
| longs.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/rules/ReduceDecimalsRule.RexExpander.html" title="class in org.apache.calcite.rel.rules">ReduceDecimalsRule.RexExpander</a></span></code> |
| <div class="block">Rewrites a decimal expression for a specific set of SqlOperator's.</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| <!-- =========== FIELD SUMMARY =========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="field.summary"> |
| <!-- --> |
| </a> |
| <h3>Field Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Field Summary table, listing fields, and an explanation"> |
| <caption><span>Fields</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Field and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static <a href="../../../../../org/apache/calcite/rel/rules/ReduceDecimalsRule.html" title="class in org.apache.calcite.rel.rules">ReduceDecimalsRule</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/rules/ReduceDecimalsRule.html#INSTANCE">INSTANCE</a></span></code> |
| <div class="block"><span class="deprecatedLabel">Deprecated.</span> |
| <div class="block"><span class="deprecationComment">Use <a href="../../../../../org/apache/calcite/rel/rules/CoreRules.html#CALC_REDUCE_DECIMALS"><code>CoreRules.CALC_REDUCE_DECIMALS</code></a>.</span></div> |
| </div> |
| </td> |
| </tr> |
| </table> |
| <ul class="blockList"> |
| <li class="blockList"><a name="fields.inherited.from.class.org.apache.calcite.plan.RelOptRule"> |
| <!-- --> |
| </a> |
| <h3>Fields inherited from class org.apache.calcite.plan.<a href="../../../../../org/apache/calcite/plan/RelOptRule.html" title="class in org.apache.calcite.plan">RelOptRule</a></h3> |
| <code><a href="../../../../../org/apache/calcite/plan/RelOptRule.html#description">description</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#operands">operands</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#relBuilderFactory">relBuilderFactory</a></code></li> |
| </ul> |
| </li> |
| </ul> |
| <!-- ======== CONSTRUCTOR SUMMARY ======== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="constructor.summary"> |
| <!-- --> |
| </a> |
| <h3>Constructor Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Constructor Summary table, listing constructors, and an explanation"> |
| <caption><span>Constructors</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colOne" scope="col">Constructor and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/rules/ReduceDecimalsRule.html#ReduceDecimalsRule-org.apache.calcite.tools.RelBuilderFactory-">ReduceDecimalsRule</a></span>(<a href="../../../../../org/apache/calcite/tools/RelBuilderFactory.html" title="interface in org.apache.calcite.tools">RelBuilderFactory</a> relBuilderFactory)</code> |
| <div class="block">Creates a ReduceDecimalsRule.</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| <!-- ========== METHOD SUMMARY =========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="method.summary"> |
| <!-- --> |
| </a> |
| <h3>Method Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation"> |
| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Method and Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/calcite/plan/Convention.html" title="interface in org.apache.calcite.plan">Convention</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/rules/ReduceDecimalsRule.html#getOutConvention--">getOutConvention</a></span>()</code> |
| <div class="block">Returns the convention of the result of firing this rule, null if |
| not known.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/rules/ReduceDecimalsRule.html#onMatch-org.apache.calcite.plan.RelOptRuleCall-">onMatch</a></span>(<a href="../../../../../org/apache/calcite/plan/RelOptRuleCall.html" title="class in org.apache.calcite.plan">RelOptRuleCall</a> call)</code> |
| <div class="block">Receives notification about a rule match.</div> |
| </td> |
| </tr> |
| </table> |
| <ul class="blockList"> |
| <li class="blockList"><a name="methods.inherited.from.class.org.apache.calcite.plan.RelOptRule"> |
| <!-- --> |
| </a> |
| <h3>Methods inherited from class org.apache.calcite.plan.<a href="../../../../../org/apache/calcite/plan/RelOptRule.html" title="class in org.apache.calcite.plan">RelOptRule</a></h3> |
| <code><a href="../../../../../org/apache/calcite/plan/RelOptRule.html#any--">any</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#convert-org.apache.calcite.rel.RelNode-org.apache.calcite.plan.RelTrait-">convert</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#convert-org.apache.calcite.rel.RelNode-org.apache.calcite.plan.RelTraitSet-">convert</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#convertList-java.util.List-org.apache.calcite.plan.RelTrait-">convertList</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#convertOperand-java.lang.Class-java.util.function.Predicate-org.apache.calcite.plan.RelTrait-">convertOperand</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#convertOperand-java.lang.Class-com.google.common.base.Predicate-org.apache.calcite.plan.RelTrait-">convertOperand</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#equals-java.lang.Object-">equals</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#equals-org.apache.calcite.plan.RelOptRule-">equals</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#getOperand--">getOperand</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#getOperands--">getOperands</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#getOutTrait--">getOutTrait</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#hashCode--">hashCode</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#matches-org.apache.calcite.plan.RelOptRuleCall-">matches</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#none--">none</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#operand-java.lang.Class-org.apache.calcite.plan.RelOptRuleOperandChildren-">operand</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#operand-java.lang.Class-org.apache.calcite.plan.RelOptRuleOperand-org.apache.calcite.plan.RelOptRuleOperand...-">operand</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#operand-java.lang.Class-org.apache.calcite.plan.RelTrait-com.google.common.base.Predicate-org.apache.calcite.plan.RelOptRuleOperandChildren-">operand</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#operand-java.lang.Class-org.apache.calcite.plan.RelTrait-com.google.common.base.Predicate-org.apache.calcite.plan.RelOptRuleOperand-org.apache.calcite.plan.RelOptRuleOperand...-">operand</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#operand-java.lang.Class-org.apache.calcite.plan.RelTrait-org.apache.calcite.plan.RelOptRuleOperandChildren-">operand</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#operandJ-java.lang.Class-org.apache.calcite.plan.RelTrait-java.util.function.Predicate-org.apache.calcite.plan.RelOptRuleOperandChildren-">operandJ</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#operandJ-java.lang.Class-org.apache.calcite.plan.RelTrait-java.util.function.Predicate-org.apache.calcite.plan.RelOptRuleOperand-org.apache.calcite.plan.RelOptRuleOperand...-">operandJ</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#some-org.apache.calcite.plan.RelOptRuleOperand-org.apache.calcite.plan.RelOptRuleOperand...-">some</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#toString--">toString</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#unordered-org.apache.calcite.plan.RelOptRuleOperand-org.apache.calcite.plan.RelOptRuleOperand...-">unordered</a></code></li> |
| </ul> |
| <ul class="blockList"> |
| <li class="blockList"><a name="methods.inherited.from.class.java.lang.Object"> |
| <!-- --> |
| </a> |
| <h3>Methods inherited from class java.lang.<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></h3> |
| <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
| <div class="details"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <!-- ============ FIELD DETAIL =========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="field.detail"> |
| <!-- --> |
| </a> |
| <h3>Field Detail</h3> |
| <a name="INSTANCE"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>INSTANCE</h4> |
| <pre><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang">@Deprecated</a> |
| public static final <a href="../../../../../org/apache/calcite/rel/rules/ReduceDecimalsRule.html" title="class in org.apache.calcite.rel.rules">ReduceDecimalsRule</a> INSTANCE</pre> |
| <div class="block"><span class="deprecatedLabel">Deprecated.</span> <span class="deprecationComment">Use <a href="../../../../../org/apache/calcite/rel/rules/CoreRules.html#CALC_REDUCE_DECIMALS"><code>CoreRules.CALC_REDUCE_DECIMALS</code></a>.</span></div> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="constructor.detail"> |
| <!-- --> |
| </a> |
| <h3>Constructor Detail</h3> |
| <a name="ReduceDecimalsRule-org.apache.calcite.tools.RelBuilderFactory-"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>ReduceDecimalsRule</h4> |
| <pre>public ReduceDecimalsRule(<a href="../../../../../org/apache/calcite/tools/RelBuilderFactory.html" title="interface in org.apache.calcite.tools">RelBuilderFactory</a> relBuilderFactory)</pre> |
| <div class="block">Creates a ReduceDecimalsRule.</div> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| <!-- ============ METHOD DETAIL ========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="method.detail"> |
| <!-- --> |
| </a> |
| <h3>Method Detail</h3> |
| <a name="getOutConvention--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getOutConvention</h4> |
| <pre>public <a href="../../../../../org/apache/calcite/plan/Convention.html" title="interface in org.apache.calcite.plan">Convention</a> getOutConvention()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from class: <code><a href="../../../../../org/apache/calcite/plan/RelOptRule.html#getOutConvention--">RelOptRule</a></code></span></div> |
| <div class="block">Returns the convention of the result of firing this rule, null if |
| not known.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="../../../../../org/apache/calcite/plan/RelOptRule.html#getOutConvention--">getOutConvention</a></code> in class <code><a href="../../../../../org/apache/calcite/plan/RelOptRule.html" title="class in org.apache.calcite.plan">RelOptRule</a></code></dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Convention of the result of firing this rule, null if |
| not known</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="onMatch-org.apache.calcite.plan.RelOptRuleCall-"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>onMatch</h4> |
| <pre>public void onMatch(<a href="../../../../../org/apache/calcite/plan/RelOptRuleCall.html" title="class in org.apache.calcite.plan">RelOptRuleCall</a> call)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from class: <code><a href="../../../../../org/apache/calcite/plan/RelOptRule.html#onMatch-org.apache.calcite.plan.RelOptRuleCall-">RelOptRule</a></code></span></div> |
| <div class="block">Receives notification about a rule match. At the time that this method is |
| called, <a href="../../../../../org/apache/calcite/plan/RelOptRuleCall.html#rels"><code>call.rels</code></a> holds the set of relational |
| expressions which match the operands to the rule; <code> |
| call.rels[0]</code> is the root expression. |
| |
| <p>Typically a rule would check that the nodes are valid matches, creates |
| a new expression, then calls back <a href="../../../../../org/apache/calcite/plan/RelOptRuleCall.html#transformTo-org.apache.calcite.rel.RelNode-java.util.Map-org.apache.calcite.plan.RelHintsPropagator-"><code>RelOptRuleCall.transformTo(org.apache.calcite.rel.RelNode, java.util.Map<org.apache.calcite.rel.RelNode, org.apache.calcite.rel.RelNode>, org.apache.calcite.plan.RelHintsPropagator)</code></a> to |
| register the expression.</p></div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../org/apache/calcite/plan/RelOptRule.html#onMatch-org.apache.calcite.plan.RelOptRuleCall-">onMatch</a></code> in class <code><a href="../../../../../org/apache/calcite/plan/RelOptRule.html" title="class in org.apache.calcite.plan">RelOptRule</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>call</code> - Rule call</dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../org/apache/calcite/plan/RelOptRule.html#matches-org.apache.calcite.plan.RelOptRuleCall-"><code>RelOptRule.matches(RelOptRuleCall)</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
| </div> |
| <!-- ========= END OF CLASS DATA ========= --> |
| <!-- ======= START OF BOTTOM NAVBAR ====== --> |
| <div class="bottomNav"><a name="navbar.bottom"> |
| <!-- --> |
| </a> |
| <div class="skipNav"><a href="#skip.navbar.bottom" title="Skip navigation links">Skip navigation links</a></div> |
| <a name="navbar.bottom.firstrow"> |
| <!-- --> |
| </a> |
| <ul class="navList" title="Navigation"> |
| <li><a href="../../../../../overview-summary.html">Overview</a></li> |
| <li><a href="package-summary.html">Package</a></li> |
| <li class="navBarCell1Rev">Class</li> |
| <li><a href="package-tree.html">Tree</a></li> |
| <li><a href="../../../../../deprecated-list.html">Deprecated</a></li> |
| <li><a href="../../../../../index-all.html">Index</a></li> |
| <li><a href="../../../../../help-doc.html">Help</a></li> |
| </ul> |
| <div class="aboutLanguage"><b>Apache Calcite</b></div> |
| </div> |
| <div class="subNav"> |
| <ul class="navList"> |
| <li><a href="../../../../../org/apache/calcite/rel/rules/PushProjector.ExprCondition.html" title="interface in org.apache.calcite.rel.rules"><span class="typeNameLink">Prev Class</span></a></li> |
| <li><a href="../../../../../org/apache/calcite/rel/rules/ReduceDecimalsRule.DecimalShuttle.html" title="class in org.apache.calcite.rel.rules"><span class="typeNameLink">Next Class</span></a></li> |
| </ul> |
| <ul class="navList"> |
| <li><a href="../../../../../index.html?org/apache/calcite/rel/rules/ReduceDecimalsRule.html" target="_top">Frames</a></li> |
| <li><a href="ReduceDecimalsRule.html" target="_top">No Frames</a></li> |
| </ul> |
| <ul class="navList" id="allclasses_navbar_bottom"> |
| <li><a href="../../../../../allclasses-noframe.html">All Classes</a></li> |
| </ul> |
| <div> |
| <script type="text/javascript"><!-- |
| allClassesLink = document.getElementById("allclasses_navbar_bottom"); |
| if(window==top) { |
| allClassesLink.style.display = "block"; |
| } |
| else { |
| allClassesLink.style.display = "none"; |
| } |
| //--> |
| </script> |
| </div> |
| <div> |
| <ul class="subNavList"> |
| <li>Summary: </li> |
| <li><a href="#nested.class.summary">Nested</a> | </li> |
| <li><a href="#field.summary">Field</a> | </li> |
| <li><a href="#constructor.summary">Constr</a> | </li> |
| <li><a href="#method.summary">Method</a></li> |
| </ul> |
| <ul class="subNavList"> |
| <li>Detail: </li> |
| <li><a href="#field.detail">Field</a> | </li> |
| <li><a href="#constructor.detail">Constr</a> | </li> |
| <li><a href="#method.detail">Method</a></li> |
| </ul> |
| </div> |
| <a name="skip.navbar.bottom"> |
| <!-- --> |
| </a></div> |
| <!-- ======== END OF BOTTOM NAVBAR ======= --> |
| <p class="legalCopy"><small>Copyright © 2012-2020 Apache Software Foundation. All Rights Reserved.</small></p> |
| </body> |
| </html> |
