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| <h2 title="Class ReduceExpressionsRule.FilterReduceExpressionsRule" class="title">Class ReduceExpressionsRule.FilterReduceExpressionsRule</h2> |
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| <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> |
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| <li><a href="ReduceExpressionsRule.html" title="class in org.apache.calcite.rel.rules">org.apache.calcite.rel.rules.ReduceExpressionsRule</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li>org.apache.calcite.rel.rules.ReduceExpressionsRule.FilterReduceExpressionsRule</li> |
| </ul> |
| </li> |
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| <dd><a href="ReduceExpressionsRule.html" title="class in org.apache.calcite.rel.rules">ReduceExpressionsRule</a></dd> |
| </dl> |
| <hr> |
| <pre>public static class <span class="typeNameLabel">ReduceExpressionsRule.FilterReduceExpressionsRule</span> |
| extends <a href="ReduceExpressionsRule.html" title="class in org.apache.calcite.rel.rules">ReduceExpressionsRule</a></pre> |
| <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>. |
| If the condition is a constant, the filter is removed (if TRUE) or replaced with |
| an empty <a href="../core/Values.html" title="class in org.apache.calcite.rel.core"><code>Values</code></a> (if FALSE or NULL).</div> |
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| <h3>Nested classes/interfaces inherited from class org.apache.calcite.rel.rules.<a href="ReduceExpressionsRule.html" title="class in org.apache.calcite.rel.rules">ReduceExpressionsRule</a></h3> |
| <code><a href="ReduceExpressionsRule.CalcReduceExpressionsRule.html" title="class in org.apache.calcite.rel.rules">ReduceExpressionsRule.CalcReduceExpressionsRule</a>, <a href="ReduceExpressionsRule.CaseShuttle.html" title="class in org.apache.calcite.rel.rules">ReduceExpressionsRule.CaseShuttle</a>, <a href="ReduceExpressionsRule.FilterReduceExpressionsRule.html" title="class in org.apache.calcite.rel.rules">ReduceExpressionsRule.FilterReduceExpressionsRule</a>, <a href="ReduceExpressionsRule.JoinReduceExpressionsRule.html" title="class in org.apache.calcite.rel.rules">ReduceExpressionsRule.JoinReduceExpressionsRule</a>, <a href="ReduceExpressionsRule.ProjectReduceExpressionsRule.html" title="class in org.apache.calcite.rel.rules">ReduceExpressionsRule.ProjectReduceExpressionsRule</a>, <a href="ReduceExpressionsRule.ReducibleExprLocator.html" title="class in org.apache.calcite.rel.rules">ReduceExpressionsRule.ReducibleExprLocator</a>, <a href="ReduceExpressionsRule.RexReplacer.html" title="class in org.apache.calcite.rel.rules">ReduceExpressionsRule.RexReplacer</a>, <a href="ReduceExpressionsRule.WindowReduceExpressionsRule.html" title="class in org.apache.calcite.rel.rules">ReduceExpressionsRule.WindowReduceExpressionsRule</a></code></li> |
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| <h3>Fields inherited from class org.apache.calcite.rel.rules.<a href="ReduceExpressionsRule.html" title="class in org.apache.calcite.rel.rules">ReduceExpressionsRule</a></h3> |
| <code><a href="ReduceExpressionsRule.html#CALC_INSTANCE">CALC_INSTANCE</a>, <a href="ReduceExpressionsRule.html#EXCLUSION_PATTERN">EXCLUSION_PATTERN</a>, <a href="ReduceExpressionsRule.html#FILTER_INSTANCE">FILTER_INSTANCE</a>, <a href="ReduceExpressionsRule.html#JOIN_INSTANCE">JOIN_INSTANCE</a>, <a href="ReduceExpressionsRule.html#matchNullability">matchNullability</a>, <a href="ReduceExpressionsRule.html#PROJECT_INSTANCE">PROJECT_INSTANCE</a>, <a href="ReduceExpressionsRule.html#WINDOW_INSTANCE">WINDOW_INSTANCE</a></code></li> |
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| <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> |
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| <caption><span>Constructors</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Constructor</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| <tr class="altColor"> |
| <th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(java.lang.Class,boolean,org.apache.calcite.tools.RelBuilderFactory)">FilterReduceExpressionsRule</a></span>​(java.lang.Class<? extends <a href="../core/Filter.html" title="class in org.apache.calcite.rel.core">Filter</a>> filterClass, |
| boolean matchNullability, |
| <a href="../../tools/RelBuilderFactory.html" title="interface in org.apache.calcite.tools">RelBuilderFactory</a> relBuilderFactory)</code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="rowColor"> |
| <th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(java.lang.Class,org.apache.calcite.tools.RelBuilderFactory)">FilterReduceExpressionsRule</a></span>​(java.lang.Class<? extends <a href="../core/Filter.html" title="class in org.apache.calcite.rel.core">Filter</a>> filterClass, |
| <a href="../../tools/RelBuilderFactory.html" title="interface in org.apache.calcite.tools">RelBuilderFactory</a> relBuilderFactory)</code></th> |
| <td class="colLast"> |
| <div class="block"><span class="deprecatedLabel">Deprecated.</span></div> |
| </td> |
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| <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 <a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#createEmptyRelOrEquivalent(org.apache.calcite.plan.RelOptRuleCall,org.apache.calcite.rel.core.Filter)">createEmptyRelOrEquivalent</a></span>​(<a href="../../plan/RelOptRuleCall.html" title="class in org.apache.calcite.plan">RelOptRuleCall</a> call, |
| <a href="../core/Filter.html" title="class in org.apache.calcite.rel.core">Filter</a> input)</code></th> |
| <td class="colLast"> |
| <div class="block">For static schema systems, a filter that is always false or null can be |
| replaced by a values operator that produces no rows, as the schema |
| information can just be taken from the input Rel.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#onMatch(org.apache.calcite.plan.RelOptRuleCall)">onMatch</a></span>​(<a href="../../plan/RelOptRuleCall.html" title="class in org.apache.calcite.plan">RelOptRuleCall</a> call)</code></th> |
| <td class="colLast"> |
| <div class="block">Receives notification about a rule match.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>private void</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#reduceNotNullableFilter(org.apache.calcite.plan.RelOptRuleCall,org.apache.calcite.rel.core.Filter,org.apache.calcite.rex.RexNode,boolean)">reduceNotNullableFilter</a></span>​(<a href="../../plan/RelOptRuleCall.html" title="class in org.apache.calcite.plan">RelOptRuleCall</a> call, |
| <a href="../core/Filter.html" title="class in org.apache.calcite.rel.core">Filter</a> filter, |
| <a href="../../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a> rexNode, |
| boolean reverse)</code></th> |
| <td class="colLast"> </td> |
| </tr> |
| </table> |
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| <li class="blockList"><a id="methods.inherited.from.class.org.apache.calcite.rel.rules.ReduceExpressionsRule"> |
| <!-- --> |
| </a> |
| <h3>Methods inherited from class org.apache.calcite.rel.rules.<a href="ReduceExpressionsRule.html" title="class in org.apache.calcite.rel.rules">ReduceExpressionsRule</a></h3> |
| <code><a href="ReduceExpressionsRule.html#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>, <a href="ReduceExpressionsRule.html#predicateConstants(java.lang.Class,org.apache.calcite.rex.RexBuilder,org.apache.calcite.plan.RelOptPredicateList)">predicateConstants</a>, <a href="ReduceExpressionsRule.html#pushPredicateIntoCase(org.apache.calcite.rex.RexCall)">pushPredicateIntoCase</a>, <a href="ReduceExpressionsRule.html#reduceExpressions(org.apache.calcite.rel.RelNode,java.util.List,org.apache.calcite.plan.RelOptPredicateList)">reduceExpressions</a>, <a href="ReduceExpressionsRule.html#reduceExpressions(org.apache.calcite.rel.RelNode,java.util.List,org.apache.calcite.plan.RelOptPredicateList,boolean)">reduceExpressions</a>, <a href="ReduceExpressionsRule.html#reduceExpressions(org.apache.calcite.rel.RelNode,java.util.List,org.apache.calcite.plan.RelOptPredicateList,boolean,boolean)">reduceExpressions</a>, <a href="ReduceExpressionsRule.html#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>, <a href="ReduceExpressionsRule.html#substitute(org.apache.calcite.rex.RexCall,int,org.apache.calcite.rex.RexNode)">substitute</a></code></li> |
| </ul> |
| <ul class="blockList"> |
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| <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#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> |
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| <h3>Methods inherited from class java.lang.Object</h3> |
| <code>clone, finalize, getClass, notify, notifyAll, wait, wait, wait</code></li> |
| </ul> |
| </li> |
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| </section> |
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| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
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| <h3>Constructor Detail</h3> |
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| <h4>FilterReduceExpressionsRule</h4> |
| <pre>@Deprecated |
| public FilterReduceExpressionsRule​(java.lang.Class<? extends <a href="../core/Filter.html" title="class in org.apache.calcite.rel.core">Filter</a>> filterClass, |
| <a href="../../tools/RelBuilderFactory.html" title="interface in org.apache.calcite.tools">RelBuilderFactory</a> relBuilderFactory)</pre> |
| <div class="deprecationBlock"><span class="deprecatedLabel">Deprecated.</span></div> |
| </li> |
| </ul> |
| <a id="<init>(java.lang.Class,boolean,org.apache.calcite.tools.RelBuilderFactory)"> |
| <!-- --> |
| </a> |
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| <h4>FilterReduceExpressionsRule</h4> |
| <pre>public FilterReduceExpressionsRule​(java.lang.Class<? extends <a href="../core/Filter.html" title="class in org.apache.calcite.rel.core">Filter</a>> filterClass, |
| boolean matchNullability, |
| <a href="../../tools/RelBuilderFactory.html" title="interface in org.apache.calcite.tools">RelBuilderFactory</a> relBuilderFactory)</pre> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </section> |
| <!-- ============ METHOD DETAIL ========== --> |
| <section role="region"> |
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| <!-- --> |
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| <h3>Method Detail</h3> |
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| <h4>onMatch</h4> |
| <pre class="methodSignature">public void onMatch​(<a href="../../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="../../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="../../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="../../plan/RelOptRuleCall.html#transformTo(org.apache.calcite.rel.RelNode,java.util.Map)"><code>RelOptRuleCall.transformTo(org.apache.calcite.rel.RelNode, java.util.Map<org.apache.calcite.rel.RelNode, org.apache.calcite.rel.RelNode>)</code></a> to |
| register the expression.</p></div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../plan/RelOptRule.html#onMatch(org.apache.calcite.plan.RelOptRuleCall)">onMatch</a></code> in class <code><a href="../../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="../../plan/RelOptRule.html#matches(org.apache.calcite.plan.RelOptRuleCall)"><code>RelOptRule.matches(RelOptRuleCall)</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="createEmptyRelOrEquivalent(org.apache.calcite.plan.RelOptRuleCall,org.apache.calcite.rel.core.Filter)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>createEmptyRelOrEquivalent</h4> |
| <pre class="methodSignature">protected <a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a> createEmptyRelOrEquivalent​(<a href="../../plan/RelOptRuleCall.html" title="class in org.apache.calcite.plan">RelOptRuleCall</a> call, |
| <a href="../core/Filter.html" title="class in org.apache.calcite.rel.core">Filter</a> input)</pre> |
| <div class="block">For static schema systems, a filter that is always false or null can be |
| replaced by a values operator that produces no rows, as the schema |
| information can just be taken from the input Rel. In dynamic schema |
| environments, the filter might have an unknown input type, in these cases |
| they must define a system specific alternative to a Values operator, such |
| as inserting a limit 0 instead of a filter on top of the original input. |
| |
| <p>The default implementation of this method is to call |
| <a href="../../tools/RelBuilder.html#empty()"><code>RelBuilder.empty()</code></a>, which for the static schema will be optimized |
| to an empty |
| <a href="../core/Values.html" title="class in org.apache.calcite.rel.core"><code>Values</code></a>.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>input</code> - rel to replace, assumes caller has already determined |
| equivalence to Values operation for 0 records or a |
| false filter.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>equivalent but less expensive replacement rel</dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="reduceNotNullableFilter(org.apache.calcite.plan.RelOptRuleCall,org.apache.calcite.rel.core.Filter,org.apache.calcite.rex.RexNode,boolean)"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>reduceNotNullableFilter</h4> |
| <pre class="methodSignature">private void reduceNotNullableFilter​(<a href="../../plan/RelOptRuleCall.html" title="class in org.apache.calcite.plan">RelOptRuleCall</a> call, |
| <a href="../core/Filter.html" title="class in org.apache.calcite.rel.core">Filter</a> filter, |
| <a href="../../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a> rexNode, |
| boolean reverse)</pre> |
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