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| <div class="subTitle"><span class="packageLabelInType">Package</span> <a href="package-summary.html">org.apache.calcite.rel.rules</a></div> |
| <h2 title="Class ReduceExpressionsRule" class="title">Class ReduceExpressionsRule</h2> |
| </div> |
| <div class="contentContainer"> |
| <ul class="inheritance"> |
| <li>java.lang.Object</li> |
| <li> |
| <ul class="inheritance"> |
| <li><a href="../../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.ReduceExpressionsRule</li> |
| </ul> |
| </li> |
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| <div class="description"> |
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| <dl> |
| <dt>Direct Known Subclasses:</dt> |
| <dd><code><a href="ReduceExpressionsRule.CalcReduceExpressionsRule.html" title="class in org.apache.calcite.rel.rules">ReduceExpressionsRule.CalcReduceExpressionsRule</a></code>, <code><a href="ReduceExpressionsRule.FilterReduceExpressionsRule.html" title="class in org.apache.calcite.rel.rules">ReduceExpressionsRule.FilterReduceExpressionsRule</a></code>, <code><a href="ReduceExpressionsRule.JoinReduceExpressionsRule.html" title="class in org.apache.calcite.rel.rules">ReduceExpressionsRule.JoinReduceExpressionsRule</a></code>, <code><a href="ReduceExpressionsRule.ProjectReduceExpressionsRule.html" title="class in org.apache.calcite.rel.rules">ReduceExpressionsRule.ProjectReduceExpressionsRule</a></code>, <code><a href="ReduceExpressionsRule.WindowReduceExpressionsRule.html" title="class in org.apache.calcite.rel.rules">ReduceExpressionsRule.WindowReduceExpressionsRule</a></code></dd> |
| </dl> |
| <hr> |
| <pre>public abstract class <span class="typeNameLabel">ReduceExpressionsRule</span> |
| extends <a href="../../plan/RelOptRule.html" title="class in org.apache.calcite.plan">RelOptRule</a></pre> |
| <div class="block">Collection of planner rules that apply various simplifying transformations on |
| RexNode trees. Currently, there are two transformations: |
| |
| <ul> |
| <li>Constant reduction, which evaluates constant subtrees, replacing them |
| with a corresponding RexLiteral |
| <li>Removal of redundant casts, which occurs when the argument into the cast |
| is the same as the type of the resulting cast expression |
| </ul></div> |
| </li> |
| </ul> |
| </div> |
| <div class="summary"> |
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| <!-- ======== NESTED CLASS SUMMARY ======== --> |
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| </a> |
| <h3>Nested Class Summary</h3> |
| <table class="memberSummary"> |
| <caption><span>Nested Classes</span><span class="tabEnd"> </span></caption> |
| <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> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static class </code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="ReduceExpressionsRule.CalcReduceExpressionsRule.html" title="class in org.apache.calcite.rel.rules">ReduceExpressionsRule.CalcReduceExpressionsRule</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">Rule that reduces constants inside a <a href="../core/Calc.html" title="class in org.apache.calcite.rel.core"><code>Calc</code></a>.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>protected static class </code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="ReduceExpressionsRule.CaseShuttle.html" title="class in org.apache.calcite.rel.rules">ReduceExpressionsRule.CaseShuttle</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">Shuttle that pushes predicates into a CASE.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static class </code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="ReduceExpressionsRule.FilterReduceExpressionsRule.html" title="class in org.apache.calcite.rel.rules">ReduceExpressionsRule.FilterReduceExpressionsRule</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">Rule that reduces constants inside a <a href="../core/Filter.html" title="class in org.apache.calcite.rel.core"><code>Filter</code></a>.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static class </code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="ReduceExpressionsRule.JoinReduceExpressionsRule.html" title="class in org.apache.calcite.rel.rules">ReduceExpressionsRule.JoinReduceExpressionsRule</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">Rule that reduces constants inside a <a href="../core/Join.html" title="class in org.apache.calcite.rel.core"><code>Join</code></a>.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static class </code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="ReduceExpressionsRule.ProjectReduceExpressionsRule.html" title="class in org.apache.calcite.rel.rules">ReduceExpressionsRule.ProjectReduceExpressionsRule</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">Rule that reduces constants inside a <a href="../core/Project.html" title="class in org.apache.calcite.rel.core"><code>Project</code></a>.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>protected static class </code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="ReduceExpressionsRule.ReducibleExprLocator.html" title="class in org.apache.calcite.rel.rules">ReduceExpressionsRule.ReducibleExprLocator</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">Helper class used to locate expressions that either can be reduced to |
| literals or contain redundant casts.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>protected static class </code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="ReduceExpressionsRule.RexReplacer.html" title="class in org.apache.calcite.rel.rules">ReduceExpressionsRule.RexReplacer</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">Replaces expressions with their reductions.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static class </code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="ReduceExpressionsRule.WindowReduceExpressionsRule.html" title="class in org.apache.calcite.rel.rules">ReduceExpressionsRule.WindowReduceExpressionsRule</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">Rule that reduces constants inside a <a href="../core/Window.html" title="class in org.apache.calcite.rel.core"><code>Window</code></a>.</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| </section> |
| <!-- =========== FIELD SUMMARY =========== --> |
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| <!-- --> |
| </a> |
| <h3>Field Summary</h3> |
| <table class="memberSummary"> |
| <caption><span>Fields</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colSecond" scope="col">Field</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static <a href="ReduceExpressionsRule.html" title="class in org.apache.calcite.rel.rules">ReduceExpressionsRule</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#CALC_INSTANCE">CALC_INSTANCE</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">Singleton rule that reduces constants inside a |
| <a href="../logical/LogicalCalc.html" title="class in org.apache.calcite.rel.logical"><code>LogicalCalc</code></a>.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static java.util.regex.Pattern</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#EXCLUSION_PATTERN">EXCLUSION_PATTERN</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">Regular expression that matches the description of all instances of this |
| rule and <a href="ValuesReduceRule.html" title="class in org.apache.calcite.rel.rules"><code>ValuesReduceRule</code></a> also.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static <a href="ReduceExpressionsRule.html" title="class in org.apache.calcite.rel.rules">ReduceExpressionsRule</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#FILTER_INSTANCE">FILTER_INSTANCE</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">Singleton rule that reduces constants inside a |
| <a href="../logical/LogicalFilter.html" title="class in org.apache.calcite.rel.logical"><code>LogicalFilter</code></a>.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static <a href="ReduceExpressionsRule.html" title="class in org.apache.calcite.rel.rules">ReduceExpressionsRule</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#JOIN_INSTANCE">JOIN_INSTANCE</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">Singleton rule that reduces constants inside a |
| <a href="../core/Join.html" title="class in org.apache.calcite.rel.core"><code>Join</code></a>.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>protected boolean</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#matchNullability">matchNullability</a></span></code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static <a href="ReduceExpressionsRule.html" title="class in org.apache.calcite.rel.rules">ReduceExpressionsRule</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#PROJECT_INSTANCE">PROJECT_INSTANCE</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">Singleton rule that reduces constants inside a |
| <a href="../logical/LogicalProject.html" title="class in org.apache.calcite.rel.logical"><code>LogicalProject</code></a>.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static <a href="ReduceExpressionsRule.html" title="class in org.apache.calcite.rel.rules">ReduceExpressionsRule</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#WINDOW_INSTANCE">WINDOW_INSTANCE</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">Singleton rule that reduces constants inside a |
| <a href="../logical/LogicalWindow.html" title="class in org.apache.calcite.rel.logical"><code>LogicalWindow</code></a>.</div> |
| </td> |
| </tr> |
| </table> |
| <ul class="blockList"> |
| <li class="blockList"><a id="fields.inherited.from.class.org.apache.calcite.plan.RelOptRule"> |
| <!-- --> |
| </a> |
| <h3>Fields inherited from class org.apache.calcite.plan.<a href="../../plan/RelOptRule.html" title="class in org.apache.calcite.plan">RelOptRule</a></h3> |
| <code><a href="../../plan/RelOptRule.html#description">description</a>, <a href="../../plan/RelOptRule.html#operands">operands</a>, <a href="../../plan/RelOptRule.html#relBuilderFactory">relBuilderFactory</a></code></li> |
| </ul> |
| </li> |
| </ul> |
| </section> |
| <!-- ======== CONSTRUCTOR SUMMARY ======== --> |
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| <h3>Constructor Summary</h3> |
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| <caption><span>Constructors</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier</th> |
| <th class="colSecond" scope="col">Constructor</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>protected </code></td> |
| <th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(java.lang.Class,boolean,org.apache.calcite.tools.RelBuilderFactory,java.lang.String)">ReduceExpressionsRule</a></span>​(java.lang.Class<? extends <a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>> clazz, |
| boolean matchNullability, |
| <a href="../../tools/RelBuilderFactory.html" title="interface in org.apache.calcite.tools">RelBuilderFactory</a> relBuilderFactory, |
| java.lang.String description)</code></th> |
| <td class="colLast"> |
| <div class="block">Creates a ReduceExpressionsRule.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>protected </code></td> |
| <th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(java.lang.Class,org.apache.calcite.tools.RelBuilderFactory,java.lang.String)">ReduceExpressionsRule</a></span>​(java.lang.Class<? extends <a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>> clazz, |
| <a href="../../tools/RelBuilderFactory.html" title="interface in org.apache.calcite.tools">RelBuilderFactory</a> relBuilderFactory, |
| java.lang.String description)</code></th> |
| <td class="colLast"> |
| <div class="block"><span class="deprecatedLabel">Deprecated.</span></div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| </section> |
| <!-- ========== METHOD SUMMARY =========== --> |
| <section role="region"> |
| <ul class="blockList"> |
| <li class="blockList"><a id="method.summary"> |
| <!-- --> |
| </a> |
| <h3>Method Summary</h3> |
| <table class="memberSummary"> |
| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static 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><span id="t6" class="tableTab"><span><a href="javascript:show(32);">Deprecated Methods</a></span><span class="tabEnd"> </span></span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colSecond" scope="col">Method</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>protected static void</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#findReducibleExps(org.apache.calcite.rel.type.RelDataTypeFactory,java.util.List,com.google.common.collect.ImmutableMap,java.util.List,java.util.List,java.util.List)">findReducibleExps</a></span>​(<a href="../type/RelDataTypeFactory.html" title="interface in org.apache.calcite.rel.type">RelDataTypeFactory</a> typeFactory, |
| java.util.List<<a href="../../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> exps, |
| com.google.common.collect.ImmutableMap<<a href="../../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>,​<a href="../../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> constants, |
| java.util.List<<a href="../../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> constExps, |
| java.util.List<java.lang.Boolean> addCasts, |
| java.util.List<<a href="../../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> removableCasts)</code></th> |
| <td class="colLast"> |
| <div class="block">Locates expressions that can be reduced to literals or converted to |
| expressions with redundant casts removed.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>static <C extends <a href="../../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>><br>com.google.common.collect.ImmutableMap<<a href="../../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>,​C></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#predicateConstants(java.lang.Class,org.apache.calcite.rex.RexBuilder,org.apache.calcite.plan.RelOptPredicateList)">predicateConstants</a></span>​(java.lang.Class<C> clazz, |
| <a href="../../rex/RexBuilder.html" title="class in org.apache.calcite.rex">RexBuilder</a> rexBuilder, |
| <a href="../../plan/RelOptPredicateList.html" title="class in org.apache.calcite.plan">RelOptPredicateList</a> predicates)</code></th> |
| <td class="colLast"> |
| <div class="block"><span class="deprecatedLabel">Deprecated.</span> |
| <div class="deprecationComment">Use <a href="../../plan/RelOptPredicateList.html#constantMap"><code>RelOptPredicateList.constantMap</code></a></div> |
| </div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>static <a href="../../rex/RexCall.html" title="class in org.apache.calcite.rex">RexCall</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#pushPredicateIntoCase(org.apache.calcite.rex.RexCall)">pushPredicateIntoCase</a></span>​(<a href="../../rex/RexCall.html" title="class in org.apache.calcite.rex">RexCall</a> call)</code></th> |
| <td class="colLast"> |
| <div class="block">Pushes predicates into a CASE.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>protected static boolean</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#reduceExpressions(org.apache.calcite.rel.RelNode,java.util.List,org.apache.calcite.plan.RelOptPredicateList)">reduceExpressions</a></span>​(<a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a> rel, |
| java.util.List<<a href="../../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> expList, |
| <a href="../../plan/RelOptPredicateList.html" title="class in org.apache.calcite.plan">RelOptPredicateList</a> predicates)</code></th> |
| <td class="colLast"> |
| <div class="block">Reduces a list of expressions.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>protected static boolean</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#reduceExpressions(org.apache.calcite.rel.RelNode,java.util.List,org.apache.calcite.plan.RelOptPredicateList,boolean)">reduceExpressions</a></span>​(<a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a> rel, |
| java.util.List<<a href="../../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> expList, |
| <a href="../../plan/RelOptPredicateList.html" title="class in org.apache.calcite.plan">RelOptPredicateList</a> predicates, |
| boolean unknownAsFalse)</code></th> |
| <td class="colLast"> |
| <div class="block"><span class="deprecatedLabel">Deprecated.</span></div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>protected static boolean</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#reduceExpressions(org.apache.calcite.rel.RelNode,java.util.List,org.apache.calcite.plan.RelOptPredicateList,boolean,boolean)">reduceExpressions</a></span>​(<a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a> rel, |
| java.util.List<<a href="../../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> expList, |
| <a href="../../plan/RelOptPredicateList.html" title="class in org.apache.calcite.plan">RelOptPredicateList</a> predicates, |
| boolean unknownAsFalse, |
| boolean matchNullability)</code></th> |
| <td class="colLast"> |
| <div class="block">Reduces a list of expressions.</div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>protected static boolean</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#reduceExpressionsInternal(org.apache.calcite.rel.RelNode,org.apache.calcite.rex.RexSimplify,org.apache.calcite.rex.RexUnknownAs,java.util.List,org.apache.calcite.plan.RelOptPredicateList)">reduceExpressionsInternal</a></span>​(<a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a> rel, |
| <a href="../../rex/RexSimplify.html" title="class in org.apache.calcite.rex">RexSimplify</a> simplify, |
| <a href="../../rex/RexUnknownAs.html" title="enum in org.apache.calcite.rex">RexUnknownAs</a> unknownAs, |
| java.util.List<<a href="../../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> expList, |
| <a href="../../plan/RelOptPredicateList.html" title="class in org.apache.calcite.plan">RelOptPredicateList</a> predicates)</code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>protected static <a href="../../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#substitute(org.apache.calcite.rex.RexCall,int,org.apache.calcite.rex.RexNode)">substitute</a></span>​(<a href="../../rex/RexCall.html" title="class in org.apache.calcite.rex">RexCall</a> call, |
| int ordinal, |
| <a href="../../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a> node)</code></th> |
| <td class="colLast"> |
| <div class="block">Converts op(arg0, ..., argOrdinal, ..., argN) to op(arg0,..., node, ..., argN).</div> |
| </td> |
| </tr> |
| </table> |
| <ul class="blockList"> |
| <li class="blockList"><a id="methods.inherited.from.class.org.apache.calcite.plan.RelOptRule"> |
| <!-- --> |
| </a> |
| <h3>Methods inherited from class org.apache.calcite.plan.<a href="../../plan/RelOptRule.html" title="class in org.apache.calcite.plan">RelOptRule</a></h3> |
| <code><a href="../../plan/RelOptRule.html#any()">any</a>, <a href="../../plan/RelOptRule.html#convert(org.apache.calcite.rel.RelNode,org.apache.calcite.plan.RelTrait)">convert</a>, <a href="../../plan/RelOptRule.html#convert(org.apache.calcite.rel.RelNode,org.apache.calcite.plan.RelTraitSet)">convert</a>, <a href="../../plan/RelOptRule.html#convertList(java.util.List,org.apache.calcite.plan.RelTrait)">convertList</a>, <a href="../../plan/RelOptRule.html#convertOperand(java.lang.Class,com.google.common.base.Predicate,org.apache.calcite.plan.RelTrait)">convertOperand</a>, <a href="../../plan/RelOptRule.html#convertOperand(java.lang.Class,java.util.function.Predicate,org.apache.calcite.plan.RelTrait)">convertOperand</a>, <a href="../../plan/RelOptRule.html#equals(java.lang.Object)">equals</a>, <a href="../../plan/RelOptRule.html#equals(org.apache.calcite.plan.RelOptRule)">equals</a>, <a href="../../plan/RelOptRule.html#getOperand()">getOperand</a>, <a href="../../plan/RelOptRule.html#getOperands()">getOperands</a>, <a href="../../plan/RelOptRule.html#getOutConvention()">getOutConvention</a>, <a href="../../plan/RelOptRule.html#getOutTrait()">getOutTrait</a>, <a href="../../plan/RelOptRule.html#hashCode()">hashCode</a>, <a href="../../plan/RelOptRule.html#matches(org.apache.calcite.plan.RelOptRuleCall)">matches</a>, <a href="../../plan/RelOptRule.html#none()">none</a>, <a href="../../plan/RelOptRule.html#onMatch(org.apache.calcite.plan.RelOptRuleCall)">onMatch</a>, <a href="../../plan/RelOptRule.html#operand(java.lang.Class,org.apache.calcite.plan.RelOptRuleOperandChildren)">operand</a>, <a href="../../plan/RelOptRule.html#operand(java.lang.Class,org.apache.calcite.plan.RelOptRuleOperand,org.apache.calcite.plan.RelOptRuleOperand...)">operand</a>, <a href="../../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="../../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="../../plan/RelOptRule.html#operand(java.lang.Class,org.apache.calcite.plan.RelTrait,org.apache.calcite.plan.RelOptRuleOperandChildren)">operand</a>, <a href="../../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="../../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="../../plan/RelOptRule.html#some(org.apache.calcite.plan.RelOptRuleOperand,org.apache.calcite.plan.RelOptRuleOperand...)">some</a>, <a href="../../plan/RelOptRule.html#toString()">toString</a>, <a href="../../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 id="methods.inherited.from.class.java.lang.Object"> |
| <!-- --> |
| </a> |
| <h3>Methods inherited from class java.lang.Object</h3> |
| <code>clone, finalize, getClass, notify, notifyAll, wait, wait, wait</code></li> |
| </ul> |
| </li> |
| </ul> |
| </section> |
| </li> |
| </ul> |
| </div> |
| <div class="details"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <!-- ============ FIELD DETAIL =========== --> |
| <section role="region"> |
| <ul class="blockList"> |
| <li class="blockList"><a id="field.detail"> |
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| </a> |
| <h3>Field Detail</h3> |
| <a id="EXCLUSION_PATTERN"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>EXCLUSION_PATTERN</h4> |
| <pre>public static final java.util.regex.Pattern EXCLUSION_PATTERN</pre> |
| <div class="block">Regular expression that matches the description of all instances of this |
| rule and <a href="ValuesReduceRule.html" title="class in org.apache.calcite.rel.rules"><code>ValuesReduceRule</code></a> also. Use |
| it to prevent the planner from invoking these rules.</div> |
| </li> |
| </ul> |
| <a id="FILTER_INSTANCE"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>FILTER_INSTANCE</h4> |
| <pre>public static final <a href="ReduceExpressionsRule.html" title="class in org.apache.calcite.rel.rules">ReduceExpressionsRule</a> FILTER_INSTANCE</pre> |
| <div class="block">Singleton rule that reduces constants inside a |
| <a href="../logical/LogicalFilter.html" title="class in org.apache.calcite.rel.logical"><code>LogicalFilter</code></a>.</div> |
| </li> |
| </ul> |
| <a id="PROJECT_INSTANCE"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>PROJECT_INSTANCE</h4> |
| <pre>public static final <a href="ReduceExpressionsRule.html" title="class in org.apache.calcite.rel.rules">ReduceExpressionsRule</a> PROJECT_INSTANCE</pre> |
| <div class="block">Singleton rule that reduces constants inside a |
| <a href="../logical/LogicalProject.html" title="class in org.apache.calcite.rel.logical"><code>LogicalProject</code></a>.</div> |
| </li> |
| </ul> |
| <a id="JOIN_INSTANCE"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>JOIN_INSTANCE</h4> |
| <pre>public static final <a href="ReduceExpressionsRule.html" title="class in org.apache.calcite.rel.rules">ReduceExpressionsRule</a> JOIN_INSTANCE</pre> |
| <div class="block">Singleton rule that reduces constants inside a |
| <a href="../core/Join.html" title="class in org.apache.calcite.rel.core"><code>Join</code></a>.</div> |
| </li> |
| </ul> |
| <a id="CALC_INSTANCE"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>CALC_INSTANCE</h4> |
| <pre>public static final <a href="ReduceExpressionsRule.html" title="class in org.apache.calcite.rel.rules">ReduceExpressionsRule</a> CALC_INSTANCE</pre> |
| <div class="block">Singleton rule that reduces constants inside a |
| <a href="../logical/LogicalCalc.html" title="class in org.apache.calcite.rel.logical"><code>LogicalCalc</code></a>.</div> |
| </li> |
| </ul> |
| <a id="WINDOW_INSTANCE"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>WINDOW_INSTANCE</h4> |
| <pre>public static final <a href="ReduceExpressionsRule.html" title="class in org.apache.calcite.rel.rules">ReduceExpressionsRule</a> WINDOW_INSTANCE</pre> |
| <div class="block">Singleton rule that reduces constants inside a |
| <a href="../logical/LogicalWindow.html" title="class in org.apache.calcite.rel.logical"><code>LogicalWindow</code></a>.</div> |
| </li> |
| </ul> |
| <a id="matchNullability"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>matchNullability</h4> |
| <pre>protected final boolean matchNullability</pre> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </section> |
| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
| <section role="region"> |
| <ul class="blockList"> |
| <li class="blockList"><a id="constructor.detail"> |
| <!-- --> |
| </a> |
| <h3>Constructor Detail</h3> |
| <a id="<init>(java.lang.Class,boolean,org.apache.calcite.tools.RelBuilderFactory,java.lang.String)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>ReduceExpressionsRule</h4> |
| <pre>protected ReduceExpressionsRule​(java.lang.Class<? extends <a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>> clazz, |
| boolean matchNullability, |
| <a href="../../tools/RelBuilderFactory.html" title="interface in org.apache.calcite.tools">RelBuilderFactory</a> relBuilderFactory, |
| java.lang.String description)</pre> |
| <div class="block">Creates a ReduceExpressionsRule.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>clazz</code> - class of rels to which this rule should apply</dd> |
| <dd><code>matchNullability</code> - Whether to add a CAST when a nullable expression |
| reduces to a NOT NULL literal</dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="<init>(java.lang.Class,org.apache.calcite.tools.RelBuilderFactory,java.lang.String)"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>ReduceExpressionsRule</h4> |
| <pre>@Deprecated |
| protected ReduceExpressionsRule​(java.lang.Class<? extends <a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>> clazz, |
| <a href="../../tools/RelBuilderFactory.html" title="interface in org.apache.calcite.tools">RelBuilderFactory</a> relBuilderFactory, |
| java.lang.String description)</pre> |
| <div class="deprecationBlock"><span class="deprecatedLabel">Deprecated.</span></div> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </section> |
| <!-- ============ METHOD DETAIL ========== --> |
| <section role="region"> |
| <ul class="blockList"> |
| <li class="blockList"><a id="method.detail"> |
| <!-- --> |
| </a> |
| <h3>Method Detail</h3> |
| <a id="reduceExpressions(org.apache.calcite.rel.RelNode,java.util.List,org.apache.calcite.plan.RelOptPredicateList)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>reduceExpressions</h4> |
| <pre class="methodSignature">protected static boolean reduceExpressions​(<a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a> rel, |
| java.util.List<<a href="../../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> expList, |
| <a href="../../plan/RelOptPredicateList.html" title="class in org.apache.calcite.plan">RelOptPredicateList</a> predicates)</pre> |
| <div class="block">Reduces a list of expressions.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>rel</code> - Relational expression</dd> |
| <dd><code>expList</code> - List of expressions, modified in place</dd> |
| <dd><code>predicates</code> - Constraints known to hold on input expressions</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>whether reduction found something to change, and succeeded</dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="reduceExpressions(org.apache.calcite.rel.RelNode,java.util.List,org.apache.calcite.plan.RelOptPredicateList,boolean)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>reduceExpressions</h4> |
| <pre class="methodSignature">@Deprecated |
| protected static boolean reduceExpressions​(<a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a> rel, |
| java.util.List<<a href="../../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> expList, |
| <a href="../../plan/RelOptPredicateList.html" title="class in org.apache.calcite.plan">RelOptPredicateList</a> predicates, |
| boolean unknownAsFalse)</pre> |
| <div class="deprecationBlock"><span class="deprecatedLabel">Deprecated.</span></div> |
| </li> |
| </ul> |
| <a id="reduceExpressions(org.apache.calcite.rel.RelNode,java.util.List,org.apache.calcite.plan.RelOptPredicateList,boolean,boolean)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>reduceExpressions</h4> |
| <pre class="methodSignature">protected static boolean reduceExpressions​(<a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a> rel, |
| java.util.List<<a href="../../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> expList, |
| <a href="../../plan/RelOptPredicateList.html" title="class in org.apache.calcite.plan">RelOptPredicateList</a> predicates, |
| boolean unknownAsFalse, |
| boolean matchNullability)</pre> |
| <div class="block">Reduces a list of expressions. |
| |
| <p>The <code>matchNullability</code> flag comes into play when reducing a |
| expression whose type is nullable. Suppose we are reducing an expression |
| <code>CASE WHEN 'a' = 'a' THEN 1 ELSE NULL END</code>. Before reduction the |
| type is <code>INTEGER</code> (nullable), but after reduction the literal 1 has |
| type <code>INTEGER NOT NULL</code>. |
| |
| <p>In some situations it is more important to preserve types; in this |
| case you should use <code>matchNullability = true</code> (which used to be |
| the default behavior of this method), and it will cast the literal to |
| <code>INTEGER</code> (nullable). |
| |
| <p>In other situations, you would rather propagate the new stronger type, |
| because it may allow further optimizations later; pass |
| <code>matchNullability = false</code> and no cast will be added, but you may |
| need to adjust types elsewhere in the expression tree.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>rel</code> - Relational expression</dd> |
| <dd><code>expList</code> - List of expressions, modified in place</dd> |
| <dd><code>predicates</code> - Constraints known to hold on input expressions</dd> |
| <dd><code>unknownAsFalse</code> - Whether UNKNOWN will be treated as FALSE</dd> |
| <dd><code>matchNullability</code> - Whether Calcite should add a CAST to a literal |
| resulting from simplification and expression if the |
| expression had nullable type and the literal is |
| NOT NULL</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>whether reduction found something to change, and succeeded</dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="reduceExpressionsInternal(org.apache.calcite.rel.RelNode,org.apache.calcite.rex.RexSimplify,org.apache.calcite.rex.RexUnknownAs,java.util.List,org.apache.calcite.plan.RelOptPredicateList)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>reduceExpressionsInternal</h4> |
| <pre class="methodSignature">protected static boolean reduceExpressionsInternal​(<a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a> rel, |
| <a href="../../rex/RexSimplify.html" title="class in org.apache.calcite.rex">RexSimplify</a> simplify, |
| <a href="../../rex/RexUnknownAs.html" title="enum in org.apache.calcite.rex">RexUnknownAs</a> unknownAs, |
| java.util.List<<a href="../../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> expList, |
| <a href="../../plan/RelOptPredicateList.html" title="class in org.apache.calcite.plan">RelOptPredicateList</a> predicates)</pre> |
| </li> |
| </ul> |
| <a id="findReducibleExps(org.apache.calcite.rel.type.RelDataTypeFactory,java.util.List,com.google.common.collect.ImmutableMap,java.util.List,java.util.List,java.util.List)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>findReducibleExps</h4> |
| <pre class="methodSignature">protected static void findReducibleExps​(<a href="../type/RelDataTypeFactory.html" title="interface in org.apache.calcite.rel.type">RelDataTypeFactory</a> typeFactory, |
| java.util.List<<a href="../../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> exps, |
| com.google.common.collect.ImmutableMap<<a href="../../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>,​<a href="../../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> constants, |
| java.util.List<<a href="../../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> constExps, |
| java.util.List<java.lang.Boolean> addCasts, |
| java.util.List<<a href="../../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> removableCasts)</pre> |
| <div class="block">Locates expressions that can be reduced to literals or converted to |
| expressions with redundant casts removed.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>typeFactory</code> - Type factory</dd> |
| <dd><code>exps</code> - list of candidate expressions to be examined for |
| reduction</dd> |
| <dd><code>constants</code> - List of expressions known to be constant</dd> |
| <dd><code>constExps</code> - returns the list of expressions that can be constant |
| reduced</dd> |
| <dd><code>addCasts</code> - indicator for each expression that can be constant |
| reduced, whether a cast of the resulting reduced |
| expression is potentially necessary</dd> |
| <dd><code>removableCasts</code> - returns the list of cast expressions where the cast</dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="predicateConstants(java.lang.Class,org.apache.calcite.rex.RexBuilder,org.apache.calcite.plan.RelOptPredicateList)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>predicateConstants</h4> |
| <pre class="methodSignature">@Deprecated |
| public static <C extends <a href="../../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> com.google.common.collect.ImmutableMap<<a href="../../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>,​C> predicateConstants​(java.lang.Class<C> clazz, |
| <a href="../../rex/RexBuilder.html" title="class in org.apache.calcite.rex">RexBuilder</a> rexBuilder, |
| <a href="../../plan/RelOptPredicateList.html" title="class in org.apache.calcite.plan">RelOptPredicateList</a> predicates)</pre> |
| <div class="deprecationBlock"><span class="deprecatedLabel">Deprecated.</span> |
| <div class="deprecationComment">Use <a href="../../plan/RelOptPredicateList.html#constantMap"><code>RelOptPredicateList.constantMap</code></a></div> |
| </div> |
| <div class="block">Creates a map containing each (e, constant) pair that occurs within |
| a predicate list.</div> |
| <dl> |
| <dt><span class="paramLabel">Type Parameters:</span></dt> |
| <dd><code>C</code> - what to consider a constant: <a href="../../rex/RexLiteral.html" title="class in org.apache.calcite.rex"><code>RexLiteral</code></a> to use a narrow |
| definition of constant, or <a href="../../rex/RexNode.html" title="class in org.apache.calcite.rex"><code>RexNode</code></a> to use |
| <a href="../../rex/RexUtil.html#isConstant(org.apache.calcite.rex.RexNode)"><code>RexUtil.isConstant(RexNode)</code></a></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>clazz</code> - Class of expression that is considered constant</dd> |
| <dd><code>rexBuilder</code> - Rex builder</dd> |
| <dd><code>predicates</code> - Predicate list</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Map from values to constants</dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="pushPredicateIntoCase(org.apache.calcite.rex.RexCall)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
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| <h4>pushPredicateIntoCase</h4> |
| <pre class="methodSignature">public static <a href="../../rex/RexCall.html" title="class in org.apache.calcite.rex">RexCall</a> pushPredicateIntoCase​(<a href="../../rex/RexCall.html" title="class in org.apache.calcite.rex">RexCall</a> call)</pre> |
| <div class="block">Pushes predicates into a CASE. |
| |
| <p>We have a loose definition of 'predicate': any boolean expression will |
| do, except CASE. For example '(CASE ...) = 5' or '(CASE ...) IS NULL'.</div> |
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| <h4>substitute</h4> |
| <pre class="methodSignature">protected static <a href="../../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a> substitute​(<a href="../../rex/RexCall.html" title="class in org.apache.calcite.rex">RexCall</a> call, |
| int ordinal, |
| <a href="../../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a> node)</pre> |
| <div class="block">Converts op(arg0, ..., argOrdinal, ..., argN) to op(arg0,..., node, ..., argN).</div> |
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