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| <h2 title="类 SqlNullifFunction" class="title">类 SqlNullifFunction</h2> |
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| <li><a href="../../../../../org/apache/calcite/sql/SqlOperator.html" title="org.apache.calcite.sql中的类">org.apache.calcite.sql.SqlOperator</a></li> |
| <li> |
| <ul class="inheritance"> |
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| <li>org.apache.calcite.sql.fun.SqlNullifFunction</li> |
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| <pre>public class <span class="typeNameLabel">SqlNullifFunction</span> |
| extends <a href="../../../../../org/apache/calcite/sql/SqlFunction.html" title="org.apache.calcite.sql中的类">SqlFunction</a></pre> |
| <div class="block">The <code>NULLIF</code> function.</div> |
| </li> |
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| <h3>字段概要</h3> |
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| </a> |
| <h3>从类继承的字段 org.apache.calcite.sql.<a href="../../../../../org/apache/calcite/sql/SqlOperator.html" title="org.apache.calcite.sql中的类">SqlOperator</a></h3> |
| <code><a href="../../../../../org/apache/calcite/sql/SqlOperator.html#kind">kind</a>, <a href="../../../../../org/apache/calcite/sql/SqlOperator.html#MDX_PRECEDENCE">MDX_PRECEDENCE</a>, <a href="../../../../../org/apache/calcite/sql/SqlOperator.html#NL">NL</a></code></li> |
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| <h3>构造器概要</h3> |
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| <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/sql/fun/SqlNullifFunction.html#SqlNullifFunction--">SqlNullifFunction</a></span>()</code> </td> |
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| <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></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/sql/SqlNode.html" title="org.apache.calcite.sql中的类">SqlNode</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/sql/fun/SqlNullifFunction.html#rewriteCall-org.apache.calcite.sql.validate.SqlValidator-org.apache.calcite.sql.SqlCall-">rewriteCall</a></span>(<a href="../../../../../org/apache/calcite/sql/validate/SqlValidator.html" title="org.apache.calcite.sql.validate中的接口">SqlValidator</a> validator, |
| <a href="../../../../../org/apache/calcite/sql/SqlCall.html" title="org.apache.calcite.sql中的类">SqlCall</a> call)</code> |
| <div class="block">Rewrites a call to this operator.</div> |
| </td> |
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| <h3>从类继承的方法 org.apache.calcite.sql.<a href="../../../../../org/apache/calcite/sql/SqlFunction.html" title="org.apache.calcite.sql中的类">SqlFunction</a></h3> |
| <code><a href="../../../../../org/apache/calcite/sql/SqlFunction.html#deriveType-org.apache.calcite.sql.validate.SqlValidator-org.apache.calcite.sql.validate.SqlValidatorScope-org.apache.calcite.sql.SqlCall-">deriveType</a>, <a href="../../../../../org/apache/calcite/sql/SqlFunction.html#getFunctionType--">getFunctionType</a>, <a href="../../../../../org/apache/calcite/sql/SqlFunction.html#getNameAsId--">getNameAsId</a>, <a href="../../../../../org/apache/calcite/sql/SqlFunction.html#getParamNames--">getParamNames</a>, <a href="../../../../../org/apache/calcite/sql/SqlFunction.html#getParamTypes--">getParamTypes</a>, <a href="../../../../../org/apache/calcite/sql/SqlFunction.html#getSqlIdentifier--">getSqlIdentifier</a>, <a href="../../../../../org/apache/calcite/sql/SqlFunction.html#getSyntax--">getSyntax</a>, <a href="../../../../../org/apache/calcite/sql/SqlFunction.html#isQuantifierAllowed--">isQuantifierAllowed</a>, <a href="../../../../../org/apache/calcite/sql/SqlFunction.html#unparse-org.apache.calcite.sql.SqlWriter-org.apache.calcite.sql.SqlCall-int-int-">unparse</a>, <a href="../../../../../org/apache/calcite/sql/SqlFunction.html#validateCall-org.apache.calcite.sql.SqlCall-org.apache.calcite.sql.validate.SqlValidator-org.apache.calcite.sql.validate.SqlValidatorScope-org.apache.calcite.sql.validate.SqlValidatorScope-">validateCall</a>, <a href="../../../../../org/apache/calcite/sql/SqlFunction.html#validateQuantifier-org.apache.calcite.sql.validate.SqlValidator-org.apache.calcite.sql.SqlCall-">validateQuantifier</a></code></li> |
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| <code><a href="../../../../../org/apache/calcite/sql/SqlOperator.html#acceptCall-org.apache.calcite.sql.util.SqlVisitor-org.apache.calcite.sql.SqlCall-">acceptCall</a>, <a href="../../../../../org/apache/calcite/sql/SqlOperator.html#acceptCall-org.apache.calcite.sql.util.SqlVisitor-org.apache.calcite.sql.SqlCall-boolean-org.apache.calcite.sql.util.SqlBasicVisitor.ArgHandler-">acceptCall</a>, <a href="../../../../../org/apache/calcite/sql/SqlOperator.html#adjustType-org.apache.calcite.sql.validate.SqlValidator-org.apache.calcite.sql.SqlCall-org.apache.calcite.rel.type.RelDataType-">adjustType</a>, <a href="../../../../../org/apache/calcite/sql/SqlOperator.html#allowsFraming--">allowsFraming</a>, <a href="../../../../../org/apache/calcite/sql/SqlOperator.html#argumentMustBeScalar-int-">argumentMustBeScalar</a>, <a 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href="../../../../../org/apache/calcite/sql/SqlOperator.html#validRexOperands-int-org.apache.calcite.util.Litmus-">validRexOperands</a></code></li> |
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| <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#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#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#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> |
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| </li> |
| </ul> |
| </div> |
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| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
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| <!-- --> |
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| <h3>构造器详细资料</h3> |
| <a name="SqlNullifFunction--"> |
| <!-- --> |
| </a> |
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| <li class="blockList"> |
| <h4>SqlNullifFunction</h4> |
| <pre>public SqlNullifFunction()</pre> |
| </li> |
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| </li> |
| </ul> |
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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="rewriteCall-org.apache.calcite.sql.validate.SqlValidator-org.apache.calcite.sql.SqlCall-"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>rewriteCall</h4> |
| <pre>public <a href="../../../../../org/apache/calcite/sql/SqlNode.html" title="org.apache.calcite.sql中的类">SqlNode</a> rewriteCall(<a href="../../../../../org/apache/calcite/sql/validate/SqlValidator.html" title="org.apache.calcite.sql.validate中的接口">SqlValidator</a> validator, |
| <a href="../../../../../org/apache/calcite/sql/SqlCall.html" title="org.apache.calcite.sql中的类">SqlCall</a> call)</pre> |
| <div class="block"><span class="descfrmTypeLabel">从类复制的说明: <code><a href="../../../../../org/apache/calcite/sql/SqlOperator.html#rewriteCall-org.apache.calcite.sql.validate.SqlValidator-org.apache.calcite.sql.SqlCall-">SqlOperator</a></code></span></div> |
| <div class="block">Rewrites a call to this operator. Some operators are implemented as |
| trivial rewrites (e.g. NULLIF becomes CASE). However, we don't do this at |
| createCall time because we want to preserve the original SQL syntax as |
| much as possible; instead, we do this before the call is validated (so |
| the trivial operator doesn't need its own implementation of type |
| derivation methods). The default implementation is to just return the |
| original call without any rewrite.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">覆盖:</span></dt> |
| <dd><code><a href="../../../../../org/apache/calcite/sql/SqlOperator.html#rewriteCall-org.apache.calcite.sql.validate.SqlValidator-org.apache.calcite.sql.SqlCall-">rewriteCall</a></code> 在类中 <code><a href="../../../../../org/apache/calcite/sql/SqlOperator.html" title="org.apache.calcite.sql中的类">SqlOperator</a></code></dd> |
| <dt><span class="paramLabel">参数:</span></dt> |
| <dd><code>validator</code> - Validator</dd> |
| <dd><code>call</code> - Call to be rewritten</dd> |
| <dt><span class="returnLabel">返回:</span></dt> |
| <dd>rewritten call</dd> |
| </dl> |
| </li> |
| </ul> |
| </li> |
| </ul> |
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