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| <li>Summary: </li> |
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| <div class="subTitle"><span class="packageLabelInType">Package</span> <a href="package-summary.html">org.apache.calcite.rex</a></div> |
| <h1 title="Class RexSimplify" class="title">Class RexSimplify</h1> |
| </div> |
| <div class="contentContainer"> |
| <div class="inheritance" title="Inheritance Tree"><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">java.lang.Object</a> |
| <div class="inheritance">org.apache.calcite.rex.RexSimplify</div> |
| </div> |
| <section class="description"> |
| <hr> |
| <pre>public class <span class="typeNameLabel">RexSimplify</span> |
| extends <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a></pre> |
| <div class="block">Context required to simplify a row-expression.</div> |
| </section> |
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| <h2>Field Summary</h2> |
| <div class="memberSummary"> |
| <table> |
| <caption><span>Fields</span><span class="tabEnd"> </span></caption> |
| <thead> |
| <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> |
| </thead> |
| <tbody> |
| <tr class="altColor"> |
| <td class="colFirst"><code><a href="RexBuilder.html" title="class in org.apache.calcite.rex">RexBuilder</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#rexBuilder">rexBuilder</a></span></code></th> |
| <td class="colLast"> </td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| </section> |
| </li> |
| <!-- ======== CONSTRUCTOR SUMMARY ======== --> |
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| <section class="constructorSummary"><a id="constructor.summary"> |
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| <h2>Constructor Summary</h2> |
| <div class="memberSummary"> |
| <table> |
| <caption><span>Constructors</span><span class="tabEnd"> </span></caption> |
| <thead> |
| <tr> |
| <th class="colFirst" scope="col">Constructor</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr class="altColor"> |
| <th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(org.apache.calcite.rex.RexBuilder,boolean,org.apache.calcite.rex.RexExecutor)">RexSimplify</a></span>​(<a href="RexBuilder.html" title="class in org.apache.calcite.rex">RexBuilder</a> rexBuilder, |
| boolean unknownAsFalse, |
| <a href="RexExecutor.html" title="interface in org.apache.calcite.rex">RexExecutor</a> executor)</code></th> |
| <td class="colLast"> |
| <div class="block"><span class="deprecatedLabel">Deprecated.</span></div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(org.apache.calcite.rex.RexBuilder,org.apache.calcite.plan.RelOptPredicateList,boolean,org.apache.calcite.rex.RexExecutor)">RexSimplify</a></span>​(<a href="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, |
| boolean unknownAsFalse, |
| <a href="RexExecutor.html" title="interface in org.apache.calcite.rex">RexExecutor</a> executor)</code></th> |
| <td class="colLast"> |
| <div class="block"><span class="deprecatedLabel">Deprecated.</span></div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(org.apache.calcite.rex.RexBuilder,org.apache.calcite.plan.RelOptPredicateList,org.apache.calcite.rex.RexExecutor)">RexSimplify</a></span>​(<a href="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, |
| <a href="RexExecutor.html" title="interface in org.apache.calcite.rex">RexExecutor</a> executor)</code></th> |
| <td class="colLast"> |
| <div class="block">Creates a RexSimplify.</div> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| </section> |
| </li> |
| <!-- ========== METHOD SUMMARY =========== --> |
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| <!-- --> |
| </a> |
| <h2>Method Summary</h2> |
| <div class="memberSummary"> |
| <div role="tablist" aria-orientation="horizontal"><button role="tab" aria-selected="true" aria-controls="memberSummary_tabpanel" tabindex="0" onkeydown="switchTab(event)" id="t0" class="activeTableTab">All Methods</button><button role="tab" aria-selected="false" aria-controls="memberSummary_tabpanel" tabindex="-1" onkeydown="switchTab(event)" id="t2" class="tableTab" onclick="show(2);">Instance Methods</button><button role="tab" aria-selected="false" aria-controls="memberSummary_tabpanel" tabindex="-1" onkeydown="switchTab(event)" id="t4" class="tableTab" onclick="show(8);">Concrete Methods</button><button role="tab" aria-selected="false" aria-controls="memberSummary_tabpanel" tabindex="-1" onkeydown="switchTab(event)" id="t6" class="tableTab" onclick="show(32);">Deprecated Methods</button></div> |
| <div id="memberSummary_tabpanel" role="tabpanel"> |
| <table aria-labelledby="t0"> |
| <thead> |
| <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> |
| </thead> |
| <tbody> |
| <tr class="altColor" id="i0"> |
| <td class="colFirst"><code><a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#removeNullabilityCast(org.apache.calcite.rex.RexNode)">removeNullabilityCast</a></span>​(<a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a> e)</code></th> |
| <td class="colLast"> |
| <div class="block">Removes any casts that change nullability but not type.</div> |
| </td> |
| </tr> |
| <tr class="rowColor" id="i1"> |
| <td class="colFirst"><code><a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#simplify(org.apache.calcite.rex.RexNode)">simplify</a></span>​(<a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a> e)</code></th> |
| <td class="colLast"> |
| <div class="block">Simplifies a boolean expression.</div> |
| </td> |
| </tr> |
| <tr class="altColor" id="i2"> |
| <td class="colFirst"><code><a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#simplifyAnd(org.apache.calcite.rex.RexCall)">simplifyAnd</a></span>​(<a href="RexCall.html" title="class in org.apache.calcite.rex">RexCall</a> e)</code></th> |
| <td class="colLast"> |
| <div class="block"><span class="deprecatedLabel">Deprecated.</span></div> |
| </td> |
| </tr> |
| <tr class="rowColor" id="i3"> |
| <td class="colFirst"><code><a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#simplifyAnds(java.lang.Iterable)">simplifyAnds</a></span>​(<a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang" class="externalLink">Iterable</a><? extends <a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> nodes)</code></th> |
| <td class="colLast"> |
| <div class="block"><span class="deprecatedLabel">Deprecated.</span></div> |
| </td> |
| </tr> |
| <tr class="altColor" id="i4"> |
| <td class="colFirst"><code>@Nullable <a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#simplifyFilterPredicates(java.lang.Iterable)">simplifyFilterPredicates</a></span>​(<a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang" class="externalLink">Iterable</a><? extends <a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> predicates)</code></th> |
| <td class="colLast"> |
| <div class="block">Combines predicates AND, optimizes, and returns null if the result is |
| always false.</div> |
| </td> |
| </tr> |
| <tr class="rowColor" id="i5"> |
| <td class="colFirst"><code><a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#simplifyOr(org.apache.calcite.rex.RexCall)">simplifyOr</a></span>​(<a href="RexCall.html" title="class in org.apache.calcite.rex">RexCall</a> call)</code></th> |
| <td class="colLast"> |
| <div class="block"><span class="deprecatedLabel">Deprecated.</span></div> |
| </td> |
| </tr> |
| <tr class="altColor" id="i6"> |
| <td class="colFirst"><code><a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#simplifyOrs(java.util.List)">simplifyOrs</a></span>​(<a href="https://docs.oracle.com/javase/9/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util" class="externalLink">List</a><<a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> terms)</code></th> |
| <td class="colLast"> |
| <div class="block"><span class="deprecatedLabel">Deprecated.</span></div> |
| </td> |
| </tr> |
| <tr class="rowColor" id="i7"> |
| <td class="colFirst"><code><a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#simplifyPreservingType(org.apache.calcite.rex.RexNode)">simplifyPreservingType</a></span>​(<a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a> e)</code></th> |
| <td class="colLast"> |
| <div class="block">Simplifies a boolean expression, always preserving its type and its |
| nullability.</div> |
| </td> |
| </tr> |
| <tr class="altColor" id="i8"> |
| <td class="colFirst"><code><a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#simplifyPreservingType(org.apache.calcite.rex.RexNode,org.apache.calcite.rex.RexUnknownAs,boolean)">simplifyPreservingType</a></span>​(<a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a> e, |
| <a href="RexUnknownAs.html" title="enum in org.apache.calcite.rex">RexUnknownAs</a> unknownAs, |
| boolean matchNullability)</code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="rowColor" id="i9"> |
| <td class="colFirst"><code><a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#simplifyUnknownAs(org.apache.calcite.rex.RexNode,org.apache.calcite.rex.RexUnknownAs)">simplifyUnknownAs</a></span>​(<a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a> e, |
| <a href="RexUnknownAs.html" title="enum in org.apache.calcite.rex">RexUnknownAs</a> unknownAs)</code></th> |
| <td class="colLast"> |
| <div class="block">As <a href="#simplify(org.apache.calcite.rex.RexNode)"><code>simplify(RexNode)</code></a>, but specifying how UNKNOWN values are to be |
| treated.</div> |
| </td> |
| </tr> |
| <tr class="altColor" id="i10"> |
| <td class="colFirst"><code><a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#simplifyUnknownAsFalse(org.apache.calcite.rex.RexNode)">simplifyUnknownAsFalse</a></span>​(<a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a> e)</code></th> |
| <td class="colLast"> |
| <div class="block">As <a href="#simplify(org.apache.calcite.rex.RexNode)"><code>simplify(RexNode)</code></a>, but for a boolean expression |
| for which a result of UNKNOWN will be treated as FALSE.</div> |
| </td> |
| </tr> |
| <tr class="rowColor" id="i11"> |
| <td class="colFirst"><code><a href="RexSimplify.html" title="class in org.apache.calcite.rex">RexSimplify</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#withParanoid(boolean)">withParanoid</a></span>​(boolean paranoid)</code></th> |
| <td class="colLast"> |
| <div class="block">Returns a RexSimplify the same as this but which verifies that |
| the expression before and after simplification are equivalent.</div> |
| </td> |
| </tr> |
| <tr class="altColor" id="i12"> |
| <td class="colFirst"><code><a href="RexSimplify.html" title="class in org.apache.calcite.rex">RexSimplify</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#withPredicates(org.apache.calcite.plan.RelOptPredicateList)">withPredicates</a></span>​(<a href="../plan/RelOptPredicateList.html" title="class in org.apache.calcite.plan">RelOptPredicateList</a> predicates)</code></th> |
| <td class="colLast"> |
| <div class="block">Returns a RexSimplify the same as this but with a specified |
| <code>predicates</code> value.</div> |
| </td> |
| </tr> |
| <tr class="rowColor" id="i13"> |
| <td class="colFirst"><code><a href="RexSimplify.html" title="class in org.apache.calcite.rex">RexSimplify</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#withUnknownAsFalse(boolean)">withUnknownAsFalse</a></span>​(boolean unknownAsFalse)</code></th> |
| <td class="colLast"> |
| <div class="block"><span class="deprecatedLabel">Deprecated.</span> |
| <div class="deprecationComment">Use methods with a <a href="RexUnknownAs.html" title="enum in org.apache.calcite.rex"><code>RexUnknownAs</code></a> argument, such as |
| <code>simplify(RexNode, RexUnknownAs)</code>.</div> |
| </div> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| </div> |
| <div class="inheritedList"> |
| <h3>Methods inherited from class java.lang.<a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a></h3> |
| <a id="methods.inherited.from.class.java.lang.Object"> |
| <!-- --> |
| </a><code><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang" class="externalLink">clone</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang" class="externalLink">equals</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang" class="externalLink">finalize</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang" class="externalLink">getClass</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang" class="externalLink">hashCode</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang" class="externalLink">notify</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang" class="externalLink">notifyAll</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang" class="externalLink">toString</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang" class="externalLink">wait</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang" class="externalLink">wait</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#wait(long,int)" title="class or interface in java.lang" class="externalLink">wait</a></code></div> |
| </section> |
| </li> |
| </ul> |
| </section> |
| <section class="details"> |
| <ul class="blockList"> |
| <!-- ============ FIELD DETAIL =========== --> |
| <li class="blockList"> |
| <section class="fieldDetails"><a id="field.detail"> |
| <!-- --> |
| </a> |
| <h2>Field Details</h2> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="rexBuilder">rexBuilder</a></h3> |
| <div class="memberSignature"><span class="modifiers">public final</span> <span class="returnType"><a href="RexBuilder.html" title="class in org.apache.calcite.rex">RexBuilder</a></span> <span class="memberName">rexBuilder</span></div> |
| </section> |
| </li> |
| </ul> |
| </section> |
| </li> |
| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
| <li class="blockList"> |
| <section class="constructorDetails"><a id="constructor.detail"> |
| <!-- --> |
| </a> |
| <h2>Constructor Details</h2> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="<init>(org.apache.calcite.rex.RexBuilder,org.apache.calcite.plan.RelOptPredicateList,org.apache.calcite.rex.RexExecutor)">RexSimplify</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="memberName">RexSimplify</span>​(<span class="arguments"><a href="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, |
| <a href="RexExecutor.html" title="interface in org.apache.calcite.rex">RexExecutor</a> executor)</span></div> |
| <div class="block">Creates a RexSimplify.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>rexBuilder</code> - Rex builder</dd> |
| <dd><code>predicates</code> - Predicates known to hold on input fields</dd> |
| <dd><code>executor</code> - Executor for constant reduction, not null</dd> |
| </dl> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="<init>(org.apache.calcite.rex.RexBuilder,boolean,org.apache.calcite.rex.RexExecutor)">RexSimplify</a></h3> |
| <div class="memberSignature"><span class="annotations"><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang" class="externalLink">@Deprecated</a> |
| </span><span class="modifiers">public</span> <span class="memberName">RexSimplify</span>​(<span class="arguments"><a href="RexBuilder.html" title="class in org.apache.calcite.rex">RexBuilder</a> rexBuilder, |
| boolean unknownAsFalse, |
| <a href="RexExecutor.html" title="interface in org.apache.calcite.rex">RexExecutor</a> executor)</span></div> |
| <div class="deprecationBlock"><span class="deprecatedLabel">Deprecated.</span></div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="<init>(org.apache.calcite.rex.RexBuilder,org.apache.calcite.plan.RelOptPredicateList,boolean,org.apache.calcite.rex.RexExecutor)">RexSimplify</a></h3> |
| <div class="memberSignature"><span class="annotations"><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang" class="externalLink">@Deprecated</a> |
| </span><span class="modifiers">public</span> <span class="memberName">RexSimplify</span>​(<span class="arguments"><a href="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, |
| boolean unknownAsFalse, |
| <a href="RexExecutor.html" title="interface in org.apache.calcite.rex">RexExecutor</a> executor)</span></div> |
| <div class="deprecationBlock"><span class="deprecatedLabel">Deprecated.</span></div> |
| </section> |
| </li> |
| </ul> |
| </section> |
| </li> |
| <!-- ============ METHOD DETAIL ========== --> |
| <li class="blockList"> |
| <section class="methodDetails"><a id="method.detail"> |
| <!-- --> |
| </a> |
| <h2>Method Details</h2> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="withUnknownAsFalse(boolean)">withUnknownAsFalse</a></h3> |
| <div class="memberSignature"><span class="annotations"><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang" class="externalLink">@Deprecated</a> |
| </span><span class="modifiers">public</span> <span class="returnType"><a href="RexSimplify.html" title="class in org.apache.calcite.rex">RexSimplify</a></span> <span class="memberName">withUnknownAsFalse</span>​(<span class="arguments">boolean unknownAsFalse)</span></div> |
| <div class="deprecationBlock"><span class="deprecatedLabel">Deprecated.</span> |
| <div class="deprecationComment">Use methods with a <a href="RexUnknownAs.html" title="enum in org.apache.calcite.rex"><code>RexUnknownAs</code></a> argument, such as |
| <code>simplify(RexNode, RexUnknownAs)</code>.</div> |
| </div> |
| <div class="block">Returns a RexSimplify the same as this but with a specified |
| <code>defaultUnknownAs</code> value.</div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="withPredicates(org.apache.calcite.plan.RelOptPredicateList)">withPredicates</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="returnType"><a href="RexSimplify.html" title="class in org.apache.calcite.rex">RexSimplify</a></span> <span class="memberName">withPredicates</span>​(<span class="arguments"><a href="../plan/RelOptPredicateList.html" title="class in org.apache.calcite.plan">RelOptPredicateList</a> predicates)</span></div> |
| <div class="block">Returns a RexSimplify the same as this but with a specified |
| <code>predicates</code> value.</div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="withParanoid(boolean)">withParanoid</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="returnType"><a href="RexSimplify.html" title="class in org.apache.calcite.rex">RexSimplify</a></span> <span class="memberName">withParanoid</span>​(<span class="arguments">boolean paranoid)</span></div> |
| <div class="block">Returns a RexSimplify the same as this but which verifies that |
| the expression before and after simplification are equivalent.</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><code>verify(org.apache.calcite.rex.RexNode, org.apache.calcite.rex.RexNode, org.apache.calcite.rex.RexUnknownAs)</code></dd> |
| </dl> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="simplifyPreservingType(org.apache.calcite.rex.RexNode)">simplifyPreservingType</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="returnType"><a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></span> <span class="memberName">simplifyPreservingType</span>​(<span class="arguments"><a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a> e)</span></div> |
| <div class="block">Simplifies a boolean expression, always preserving its type and its |
| nullability. |
| |
| <p>This is useful if you are simplifying expressions in a |
| <a href="../rel/core/Project.html" title="class in org.apache.calcite.rel.core"><code>Project</code></a>.</div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="simplifyPreservingType(org.apache.calcite.rex.RexNode,org.apache.calcite.rex.RexUnknownAs,boolean)">simplifyPreservingType</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="returnType"><a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></span> <span class="memberName">simplifyPreservingType</span>​(<span class="arguments"><a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a> e, |
| <a href="RexUnknownAs.html" title="enum in org.apache.calcite.rex">RexUnknownAs</a> unknownAs, |
| boolean matchNullability)</span></div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="simplify(org.apache.calcite.rex.RexNode)">simplify</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="returnType"><a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></span> <span class="memberName">simplify</span>​(<span class="arguments"><a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a> e)</span></div> |
| <div class="block">Simplifies a boolean expression. |
| |
| <p>In particular:</p> |
| <ul> |
| <li><code>simplify(x = 1 AND y = 2 AND NOT x = 1)</code> |
| returns <code>y = 2</code></li> |
| <li><code>simplify(x = 1 AND FALSE)</code> |
| returns <code>FALSE</code></li> |
| </ul> |
| |
| <p>Handles UNKNOWN values using the policy specified when you created this |
| <code>RexSimplify</code>. Unless you used a deprecated constructor, that policy |
| is <a href="RexUnknownAs.html#UNKNOWN"><code>RexUnknownAs.UNKNOWN</code></a>. |
| |
| <p>If the expression is a predicate in a WHERE clause, consider instead |
| using <a href="#simplifyUnknownAsFalse(org.apache.calcite.rex.RexNode)"><code>simplifyUnknownAsFalse(RexNode)</code></a>.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>e</code> - Expression to simplify</dd> |
| </dl> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="simplifyUnknownAsFalse(org.apache.calcite.rex.RexNode)">simplifyUnknownAsFalse</a></h3> |
| <div class="memberSignature"><span class="modifiers">public final</span> <span class="returnType"><a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></span> <span class="memberName">simplifyUnknownAsFalse</span>​(<span class="arguments"><a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a> e)</span></div> |
| <div class="block">As <a href="#simplify(org.apache.calcite.rex.RexNode)"><code>simplify(RexNode)</code></a>, but for a boolean expression |
| for which a result of UNKNOWN will be treated as FALSE. |
| |
| <p>Use this form for expressions on a WHERE, ON, HAVING or FILTER(WHERE) |
| clause. |
| |
| <p>This may allow certain additional simplifications. A result of UNKNOWN |
| may yield FALSE, however it may still yield UNKNOWN. (If the simplified |
| expression has type BOOLEAN NOT NULL, then of course it can only return |
| FALSE.)</div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="simplifyUnknownAs(org.apache.calcite.rex.RexNode,org.apache.calcite.rex.RexUnknownAs)">simplifyUnknownAs</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="returnType"><a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></span> <span class="memberName">simplifyUnknownAs</span>​(<span class="arguments"><a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a> e, |
| <a href="RexUnknownAs.html" title="enum in org.apache.calcite.rex">RexUnknownAs</a> unknownAs)</span></div> |
| <div class="block">As <a href="#simplify(org.apache.calcite.rex.RexNode)"><code>simplify(RexNode)</code></a>, but specifying how UNKNOWN values are to be |
| treated. |
| |
| <p>If UNKNOWN is treated as FALSE, this may allow certain additional |
| simplifications. A result of UNKNOWN may yield FALSE, however it may still |
| yield UNKNOWN. (If the simplified expression has type BOOLEAN NOT NULL, |
| then of course it can only return FALSE.)</div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="simplifyAnds(java.lang.Iterable)">simplifyAnds</a></h3> |
| <div class="memberSignature"><span class="annotations"><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang" class="externalLink">@Deprecated</a> |
| </span><span class="modifiers">public</span> <span class="returnType"><a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></span> <span class="memberName">simplifyAnds</span>​(<span class="arguments"><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang" class="externalLink">Iterable</a><? extends <a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> nodes)</span></div> |
| <div class="deprecationBlock"><span class="deprecatedLabel">Deprecated.</span></div> |
| <div class="block">Simplifies a conjunction of boolean expressions.</div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="simplifyAnd(org.apache.calcite.rex.RexCall)">simplifyAnd</a></h3> |
| <div class="memberSignature"><span class="annotations"><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang" class="externalLink">@Deprecated</a> |
| </span><span class="modifiers">public</span> <span class="returnType"><a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></span> <span class="memberName">simplifyAnd</span>​(<span class="arguments"><a href="RexCall.html" title="class in org.apache.calcite.rex">RexCall</a> e)</span></div> |
| <div class="deprecationBlock"><span class="deprecatedLabel">Deprecated.</span></div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="simplifyOr(org.apache.calcite.rex.RexCall)">simplifyOr</a></h3> |
| <div class="memberSignature"><span class="annotations"><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang" class="externalLink">@Deprecated</a> |
| </span><span class="modifiers">public</span> <span class="returnType"><a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></span> <span class="memberName">simplifyOr</span>​(<span class="arguments"><a href="RexCall.html" title="class in org.apache.calcite.rex">RexCall</a> call)</span></div> |
| <div class="deprecationBlock"><span class="deprecatedLabel">Deprecated.</span></div> |
| <div class="block">Simplifies OR(x, x) into x, and similar. |
| The simplified expression returns UNKNOWN values as is (not as FALSE).</div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="simplifyOrs(java.util.List)">simplifyOrs</a></h3> |
| <div class="memberSignature"><span class="annotations"><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang" class="externalLink">@Deprecated</a> |
| </span><span class="modifiers">public</span> <span class="returnType"><a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></span> <span class="memberName">simplifyOrs</span>​(<span class="arguments"><a href="https://docs.oracle.com/javase/9/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util" class="externalLink">List</a><<a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> terms)</span></div> |
| <div class="deprecationBlock"><span class="deprecatedLabel">Deprecated.</span></div> |
| <div class="block">Simplifies a list of terms and combines them into an OR. |
| Modifies the list in place. |
| The simplified expression returns UNKNOWN values as is (not as FALSE).</div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="removeNullabilityCast(org.apache.calcite.rex.RexNode)">removeNullabilityCast</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="returnType"><a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></span> <span class="memberName">removeNullabilityCast</span>​(<span class="arguments"><a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a> e)</span></div> |
| <div class="block">Removes any casts that change nullability but not type. |
| |
| <p>For example, <code>CAST(1 = 0 AS BOOLEAN)</code> becomes <code>1 = 0</code>.</div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="simplifyFilterPredicates(java.lang.Iterable)">simplifyFilterPredicates</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="returnType">@Nullable <a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></span> <span class="memberName">simplifyFilterPredicates</span>​(<span class="arguments"><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang" class="externalLink">Iterable</a><? extends <a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> predicates)</span></div> |
| <div class="block">Combines predicates AND, optimizes, and returns null if the result is |
| always false. |
| |
| <p>The expression is simplified on the assumption that an UNKNOWN value |
| is always treated as FALSE. Therefore the simplified expression may |
| sometimes evaluate to FALSE where the original expression would evaluate to |
| UNKNOWN.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>predicates</code> - Filter condition predicates</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>simplified conjunction of predicates for the filter, null if always false</dd> |
| </dl> |
| </section> |
| </li> |
| </ul> |
| </section> |
| </li> |
| </ul> |
| </section> |
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