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| <li>概要: </li> |
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| <li><a href="#field.summary">字段</a> | </li> |
| <li><a href="#constructor.summary">构造器</a> | </li> |
| <li><a href="#method.summary">方法</a></li> |
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| <li><a href="#field.detail">字段</a> | </li> |
| <li><a href="#constructor.detail">构造器</a> | </li> |
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| <div class="subTitle">org.apache.calcite.rex</div> |
| <h2 title="类 RexSimplify" class="title">类 RexSimplify</h2> |
| </div> |
| <div class="contentContainer"> |
| <ul class="inheritance"> |
| <li><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="java.lang中的类或接口">java.lang.Object</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li>org.apache.calcite.rex.RexSimplify</li> |
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| <div class="description"> |
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| <br> |
| <pre>public class <span class="typeNameLabel">RexSimplify</span> |
| extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="java.lang中的类或接口">Object</a></pre> |
| <div class="block">Context required to simplify a row-expression.</div> |
| </li> |
| </ul> |
| </div> |
| <div class="summary"> |
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| <!-- =========== FIELD SUMMARY =========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="field.summary"> |
| <!-- --> |
| </a> |
| <h3>字段概要</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="字段概要表, 列表字段和解释"> |
| <caption><span>字段</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">限定符和类型</th> |
| <th class="colLast" scope="col">字段和说明</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/calcite/rex/RexBuilder.html" title="org.apache.calcite.rex中的类">RexBuilder</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexSimplify.html#rexBuilder">rexBuilder</a></span></code> </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| <!-- ======== CONSTRUCTOR SUMMARY ======== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="constructor.summary"> |
| <!-- --> |
| </a> |
| <h3>构造器概要</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="构造器概要表, 列表构造器和解释"> |
| <caption><span>构造器</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colOne" scope="col">构造器和说明</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexSimplify.html#RexSimplify-org.apache.calcite.rex.RexBuilder-boolean-org.apache.calcite.rex.RexExecutor-">RexSimplify</a></span>(<a href="../../../../org/apache/calcite/rex/RexBuilder.html" title="org.apache.calcite.rex中的类">RexBuilder</a> rexBuilder, |
| boolean unknownAsFalse, |
| <a href="../../../../org/apache/calcite/rex/RexExecutor.html" title="org.apache.calcite.rex中的接口">RexExecutor</a> executor)</code> |
| <div class="block"><span class="deprecatedLabel">已过时。</span> </div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexSimplify.html#RexSimplify-org.apache.calcite.rex.RexBuilder-org.apache.calcite.plan.RelOptPredicateList-boolean-org.apache.calcite.rex.RexExecutor-">RexSimplify</a></span>(<a href="../../../../org/apache/calcite/rex/RexBuilder.html" title="org.apache.calcite.rex中的类">RexBuilder</a> rexBuilder, |
| <a href="../../../../org/apache/calcite/plan/RelOptPredicateList.html" title="org.apache.calcite.plan中的类">RelOptPredicateList</a> predicates, |
| boolean unknownAsFalse, |
| <a href="../../../../org/apache/calcite/rex/RexExecutor.html" title="org.apache.calcite.rex中的接口">RexExecutor</a> executor)</code> |
| <div class="block"><span class="deprecatedLabel">已过时。</span> </div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexSimplify.html#RexSimplify-org.apache.calcite.rex.RexBuilder-org.apache.calcite.plan.RelOptPredicateList-org.apache.calcite.rex.RexExecutor-">RexSimplify</a></span>(<a href="../../../../org/apache/calcite/rex/RexBuilder.html" title="org.apache.calcite.rex中的类">RexBuilder</a> rexBuilder, |
| <a href="../../../../org/apache/calcite/plan/RelOptPredicateList.html" title="org.apache.calcite.plan中的类">RelOptPredicateList</a> predicates, |
| <a href="../../../../org/apache/calcite/rex/RexExecutor.html" title="org.apache.calcite.rex中的接口">RexExecutor</a> executor)</code> |
| <div class="block">Creates a RexSimplify.</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| <!-- ========== METHOD SUMMARY =========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="method.summary"> |
| <!-- --> |
| </a> |
| <h3>方法概要</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="方法概要表, 列表方法和解释"> |
| <caption><span id="t0" class="activeTableTab"><span>所有方法</span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">实例方法</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">具体方法</a></span><span class="tabEnd"> </span></span><span id="t6" class="tableTab"><span><a href="javascript:show(32);">已过时的方法</a></span><span class="tabEnd"> </span></span></caption> |
| <tr> |
| <th class="colFirst" scope="col">限定符和类型</th> |
| <th class="colLast" scope="col">方法和说明</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexSimplify.html#removeNullabilityCast-org.apache.calcite.rex.RexNode-">removeNullabilityCast</a></span>(<a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a> e)</code> |
| <div class="block">Removes any casts that change nullability but not type.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexSimplify.html#simplify-org.apache.calcite.rex.RexNode-">simplify</a></span>(<a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a> e)</code> |
| <div class="block">Simplifies a boolean expression.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexSimplify.html#simplifyAnd-org.apache.calcite.rex.RexCall-">simplifyAnd</a></span>(<a href="../../../../org/apache/calcite/rex/RexCall.html" title="org.apache.calcite.rex中的类">RexCall</a> e)</code> |
| <div class="block"><span class="deprecatedLabel">已过时。</span> </div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexSimplify.html#simplifyAnds-java.lang.Iterable-">simplifyAnds</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="java.lang中的类或接口">Iterable</a><? extends <a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a>> nodes)</code> |
| <div class="block"><span class="deprecatedLabel">已过时。</span> </div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexSimplify.html#simplifyFilterPredicates-java.lang.Iterable-">simplifyFilterPredicates</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="java.lang中的类或接口">Iterable</a><? extends <a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a>> predicates)</code> |
| <div class="block">Combines predicates AND, optimizes, and returns null if the result is |
| always false.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexSimplify.html#simplifyOr-org.apache.calcite.rex.RexCall-">simplifyOr</a></span>(<a href="../../../../org/apache/calcite/rex/RexCall.html" title="org.apache.calcite.rex中的类">RexCall</a> call)</code> |
| <div class="block"><span class="deprecatedLabel">已过时。</span> </div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexSimplify.html#simplifyOrs-java.util.List-">simplifyOrs</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="java.util中的类或接口">List</a><<a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a>> terms)</code> |
| <div class="block"><span class="deprecatedLabel">已过时。</span> </div> |
| </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexSimplify.html#simplifyPreservingType-org.apache.calcite.rex.RexNode-">simplifyPreservingType</a></span>(<a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a> e)</code> |
| <div class="block">Simplifies a boolean expression, always preserving its type and its |
| nullability.</div> |
| </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexSimplify.html#simplifyPreservingType-org.apache.calcite.rex.RexNode-org.apache.calcite.rex.RexUnknownAs-boolean-">simplifyPreservingType</a></span>(<a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a> e, |
| <a href="../../../../org/apache/calcite/rex/RexUnknownAs.html" title="org.apache.calcite.rex中的枚举">RexUnknownAs</a> unknownAs, |
| boolean matchNullability)</code> </td> |
| </tr> |
| <tr id="i9" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexSimplify.html#simplifyUnknownAs-org.apache.calcite.rex.RexNode-org.apache.calcite.rex.RexUnknownAs-">simplifyUnknownAs</a></span>(<a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a> e, |
| <a href="../../../../org/apache/calcite/rex/RexUnknownAs.html" title="org.apache.calcite.rex中的枚举">RexUnknownAs</a> unknownAs)</code> |
| <div class="block">As <a href="../../../../org/apache/calcite/rex/RexSimplify.html#simplify-org.apache.calcite.rex.RexNode-"><code>simplify(RexNode)</code></a>, but specifying how UNKNOWN values are to be |
| treated.</div> |
| </td> |
| </tr> |
| <tr id="i10" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexSimplify.html#simplifyUnknownAsFalse-org.apache.calcite.rex.RexNode-">simplifyUnknownAsFalse</a></span>(<a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a> e)</code> |
| <div class="block">As <a href="../../../../org/apache/calcite/rex/RexSimplify.html#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 id="i11" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/calcite/rex/RexSimplify.html" title="org.apache.calcite.rex中的类">RexSimplify</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexSimplify.html#withParanoid-boolean-">withParanoid</a></span>(boolean paranoid)</code> |
| <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 id="i12" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/calcite/rex/RexSimplify.html" title="org.apache.calcite.rex中的类">RexSimplify</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexSimplify.html#withPredicates-org.apache.calcite.plan.RelOptPredicateList-">withPredicates</a></span>(<a href="../../../../org/apache/calcite/plan/RelOptPredicateList.html" title="org.apache.calcite.plan中的类">RelOptPredicateList</a> predicates)</code> |
| <div class="block">Returns a RexSimplify the same as this but with a specified |
| <a href="../../../../org/apache/calcite/rex/RexSimplify.html#predicates"><code>predicates</code></a> value.</div> |
| </td> |
| </tr> |
| <tr id="i13" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/calcite/rex/RexSimplify.html" title="org.apache.calcite.rex中的类">RexSimplify</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rex/RexSimplify.html#withUnknownAsFalse-boolean-">withUnknownAsFalse</a></span>(boolean unknownAsFalse)</code> |
| <div class="block"><span class="deprecatedLabel">已过时。</span> |
| <div class="block"><span class="deprecationComment">Use methods with a <a href="../../../../org/apache/calcite/rex/RexUnknownAs.html" title="org.apache.calcite.rex中的枚举"><code>RexUnknownAs</code></a> argument, such as |
| <a href="../../../../org/apache/calcite/rex/RexSimplify.html#simplify-org.apache.calcite.rex.RexNode-org.apache.calcite.rex.RexUnknownAs-"><code>simplify(RexNode, RexUnknownAs)</code></a>.</span></div> |
| </div> |
| </td> |
| </tr> |
| </table> |
| <ul class="blockList"> |
| <li class="blockList"><a name="methods.inherited.from.class.java.lang.Object"> |
| <!-- --> |
| </a> |
| <h3>从类继承的方法 java.lang.<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="java.lang中的类或接口">Object</a></h3> |
| <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="java.lang中的类或接口">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="java.lang中的类或接口">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="java.lang中的类或接口">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="java.lang中的类或接口">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="java.lang中的类或接口">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="java.lang中的类或接口">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="java.lang中的类或接口">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="java.lang中的类或接口">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="java.lang中的类或接口">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="java.lang中的类或接口">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="java.lang中的类或接口">wait</a></code></li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
| <div class="details"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <!-- ============ FIELD DETAIL =========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="field.detail"> |
| <!-- --> |
| </a> |
| <h3>字段详细资料</h3> |
| <a name="rexBuilder"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>rexBuilder</h4> |
| <pre>public final <a href="../../../../org/apache/calcite/rex/RexBuilder.html" title="org.apache.calcite.rex中的类">RexBuilder</a> rexBuilder</pre> |
| </li> |
| </ul> |
| </li> |
| </ul> |
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| <li class="blockList"><a name="constructor.detail"> |
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| </a> |
| <h3>构造器详细资料</h3> |
| <a name="RexSimplify-org.apache.calcite.rex.RexBuilder-org.apache.calcite.plan.RelOptPredicateList-org.apache.calcite.rex.RexExecutor-"> |
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| <h4>RexSimplify</h4> |
| <pre>public RexSimplify(<a href="../../../../org/apache/calcite/rex/RexBuilder.html" title="org.apache.calcite.rex中的类">RexBuilder</a> rexBuilder, |
| <a href="../../../../org/apache/calcite/plan/RelOptPredicateList.html" title="org.apache.calcite.plan中的类">RelOptPredicateList</a> predicates, |
| <a href="../../../../org/apache/calcite/rex/RexExecutor.html" title="org.apache.calcite.rex中的接口">RexExecutor</a> executor)</pre> |
| <div class="block">Creates a RexSimplify.</div> |
| <dl> |
| <dt><span class="paramLabel">参数:</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> |
| </li> |
| </ul> |
| <a name="RexSimplify-org.apache.calcite.rex.RexBuilder-boolean-org.apache.calcite.rex.RexExecutor-"> |
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| <h4>RexSimplify</h4> |
| <pre><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Deprecated.html?is-external=true" title="java.lang中的类或接口">@Deprecated</a> |
| public RexSimplify(<a href="../../../../org/apache/calcite/rex/RexBuilder.html" title="org.apache.calcite.rex中的类">RexBuilder</a> rexBuilder, |
| boolean unknownAsFalse, |
| <a href="../../../../org/apache/calcite/rex/RexExecutor.html" title="org.apache.calcite.rex中的接口">RexExecutor</a> executor)</pre> |
| <div class="block"><span class="deprecatedLabel">已过时。</span> </div> |
| </li> |
| </ul> |
| <a name="RexSimplify-org.apache.calcite.rex.RexBuilder-org.apache.calcite.plan.RelOptPredicateList-boolean-org.apache.calcite.rex.RexExecutor-"> |
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| <h4>RexSimplify</h4> |
| <pre><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Deprecated.html?is-external=true" title="java.lang中的类或接口">@Deprecated</a> |
| public RexSimplify(<a href="../../../../org/apache/calcite/rex/RexBuilder.html" title="org.apache.calcite.rex中的类">RexBuilder</a> rexBuilder, |
| <a href="../../../../org/apache/calcite/plan/RelOptPredicateList.html" title="org.apache.calcite.plan中的类">RelOptPredicateList</a> predicates, |
| boolean unknownAsFalse, |
| <a href="../../../../org/apache/calcite/rex/RexExecutor.html" title="org.apache.calcite.rex中的接口">RexExecutor</a> executor)</pre> |
| <div class="block"><span class="deprecatedLabel">已过时。</span> </div> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| <!-- ============ METHOD DETAIL ========== --> |
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| <li class="blockList"><a name="method.detail"> |
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| </a> |
| <h3>方法详细资料</h3> |
| <a name="withUnknownAsFalse-boolean-"> |
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| <h4>withUnknownAsFalse</h4> |
| <pre><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Deprecated.html?is-external=true" title="java.lang中的类或接口">@Deprecated</a> |
| public <a href="../../../../org/apache/calcite/rex/RexSimplify.html" title="org.apache.calcite.rex中的类">RexSimplify</a> withUnknownAsFalse(boolean unknownAsFalse)</pre> |
| <div class="block"><span class="deprecatedLabel">已过时。</span> <span class="deprecationComment">Use methods with a <a href="../../../../org/apache/calcite/rex/RexUnknownAs.html" title="org.apache.calcite.rex中的枚举"><code>RexUnknownAs</code></a> argument, such as |
| <a href="../../../../org/apache/calcite/rex/RexSimplify.html#simplify-org.apache.calcite.rex.RexNode-org.apache.calcite.rex.RexUnknownAs-"><code>simplify(RexNode, RexUnknownAs)</code></a>.</span></div> |
| <div class="block">Returns a RexSimplify the same as this but with a specified |
| <a href="../../../../org/apache/calcite/rex/RexSimplify.html#defaultUnknownAs"><code>defaultUnknownAs</code></a> value.</div> |
| </li> |
| </ul> |
| <a name="withPredicates-org.apache.calcite.plan.RelOptPredicateList-"> |
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| </a> |
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| <h4>withPredicates</h4> |
| <pre>public <a href="../../../../org/apache/calcite/rex/RexSimplify.html" title="org.apache.calcite.rex中的类">RexSimplify</a> withPredicates(<a href="../../../../org/apache/calcite/plan/RelOptPredicateList.html" title="org.apache.calcite.plan中的类">RelOptPredicateList</a> predicates)</pre> |
| <div class="block">Returns a RexSimplify the same as this but with a specified |
| <a href="../../../../org/apache/calcite/rex/RexSimplify.html#predicates"><code>predicates</code></a> value.</div> |
| </li> |
| </ul> |
| <a name="withParanoid-boolean-"> |
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| </a> |
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| <h4>withParanoid</h4> |
| <pre>public <a href="../../../../org/apache/calcite/rex/RexSimplify.html" title="org.apache.calcite.rex中的类">RexSimplify</a> withParanoid(boolean paranoid)</pre> |
| <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">另请参阅:</span></dt> |
| <dd><a href="../../../../org/apache/calcite/rex/RexSimplify.html#verify-org.apache.calcite.rex.RexNode-org.apache.calcite.rex.RexNode-org.apache.calcite.rex.RexUnknownAs-"><code>verify(org.apache.calcite.rex.RexNode, org.apache.calcite.rex.RexNode, org.apache.calcite.rex.RexUnknownAs)</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="simplifyPreservingType-org.apache.calcite.rex.RexNode-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>simplifyPreservingType</h4> |
| <pre>public <a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a> simplifyPreservingType(<a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a> e)</pre> |
| <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="../../../../org/apache/calcite/rel/core/Project.html" title="org.apache.calcite.rel.core中的类"><code>Project</code></a>.</div> |
| </li> |
| </ul> |
| <a name="simplifyPreservingType-org.apache.calcite.rex.RexNode-org.apache.calcite.rex.RexUnknownAs-boolean-"> |
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| </a> |
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| <h4>simplifyPreservingType</h4> |
| <pre>public <a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a> simplifyPreservingType(<a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a> e, |
| <a href="../../../../org/apache/calcite/rex/RexUnknownAs.html" title="org.apache.calcite.rex中的枚举">RexUnknownAs</a> unknownAs, |
| boolean matchNullability)</pre> |
| </li> |
| </ul> |
| <a name="simplify-org.apache.calcite.rex.RexNode-"> |
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| </a> |
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| <h4>simplify</h4> |
| <pre>public <a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a> simplify(<a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a> e)</pre> |
| <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="../../../../org/apache/calcite/rex/RexUnknownAs.html#UNKNOWN"><code>RexUnknownAs.UNKNOWN</code></a>. |
| |
| <p>If the expression is a predicate in a WHERE clause, consider instead |
| using <a href="../../../../org/apache/calcite/rex/RexSimplify.html#simplifyUnknownAsFalse-org.apache.calcite.rex.RexNode-"><code>simplifyUnknownAsFalse(RexNode)</code></a>.</div> |
| <dl> |
| <dt><span class="paramLabel">参数:</span></dt> |
| <dd><code>e</code> - Expression to simplify</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="simplifyUnknownAsFalse-org.apache.calcite.rex.RexNode-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>simplifyUnknownAsFalse</h4> |
| <pre>public final <a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a> simplifyUnknownAsFalse(<a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a> e)</pre> |
| <div class="block">As <a href="../../../../org/apache/calcite/rex/RexSimplify.html#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> |
| </li> |
| </ul> |
| <a name="simplifyUnknownAs-org.apache.calcite.rex.RexNode-org.apache.calcite.rex.RexUnknownAs-"> |
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| </a> |
| <ul class="blockList"> |
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| <h4>simplifyUnknownAs</h4> |
| <pre>public <a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a> simplifyUnknownAs(<a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a> e, |
| <a href="../../../../org/apache/calcite/rex/RexUnknownAs.html" title="org.apache.calcite.rex中的枚举">RexUnknownAs</a> unknownAs)</pre> |
| <div class="block">As <a href="../../../../org/apache/calcite/rex/RexSimplify.html#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> |
| </li> |
| </ul> |
| <a name="simplifyAnds-java.lang.Iterable-"> |
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| </a> |
| <ul class="blockList"> |
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| <h4>simplifyAnds</h4> |
| <pre><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Deprecated.html?is-external=true" title="java.lang中的类或接口">@Deprecated</a> |
| public <a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a> simplifyAnds(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="java.lang中的类或接口">Iterable</a><? extends <a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a>> nodes)</pre> |
| <div class="block"><span class="deprecatedLabel">已过时。</span> </div> |
| <div class="block">Simplifies a conjunction of boolean expressions.</div> |
| </li> |
| </ul> |
| <a name="simplifyAnd-org.apache.calcite.rex.RexCall-"> |
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| <h4>simplifyAnd</h4> |
| <pre><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Deprecated.html?is-external=true" title="java.lang中的类或接口">@Deprecated</a> |
| public <a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a> simplifyAnd(<a href="../../../../org/apache/calcite/rex/RexCall.html" title="org.apache.calcite.rex中的类">RexCall</a> e)</pre> |
| <div class="block"><span class="deprecatedLabel">已过时。</span> </div> |
| </li> |
| </ul> |
| <a name="simplifyOr-org.apache.calcite.rex.RexCall-"> |
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| <h4>simplifyOr</h4> |
| <pre><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Deprecated.html?is-external=true" title="java.lang中的类或接口">@Deprecated</a> |
| public <a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a> simplifyOr(<a href="../../../../org/apache/calcite/rex/RexCall.html" title="org.apache.calcite.rex中的类">RexCall</a> call)</pre> |
| <div class="block"><span class="deprecatedLabel">已过时。</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> |
| </li> |
| </ul> |
| <a name="simplifyOrs-java.util.List-"> |
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| <ul class="blockList"> |
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| <h4>simplifyOrs</h4> |
| <pre><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Deprecated.html?is-external=true" title="java.lang中的类或接口">@Deprecated</a> |
| public <a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a> simplifyOrs(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="java.util中的类或接口">List</a><<a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a>> terms)</pre> |
| <div class="block"><span class="deprecatedLabel">已过时。</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> |
| </li> |
| </ul> |
| <a name="removeNullabilityCast-org.apache.calcite.rex.RexNode-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>removeNullabilityCast</h4> |
| <pre>public <a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a> removeNullabilityCast(<a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a> e)</pre> |
| <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> |
| </li> |
| </ul> |
| <a name="simplifyFilterPredicates-java.lang.Iterable-"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>simplifyFilterPredicates</h4> |
| <pre>public <a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a> simplifyFilterPredicates(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="java.lang中的类或接口">Iterable</a><? extends <a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a>> predicates)</pre> |
| <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">参数:</span></dt> |
| <dd><code>predicates</code> - Filter condition predicates</dd> |
| <dt><span class="returnLabel">返回:</span></dt> |
| <dd>simplified conjunction of predicates for the filter, null if always false</dd> |
| </dl> |
| </li> |
| </ul> |
| </li> |
| </ul> |
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