apidocs/javadocAggregate/org/apache/calcite/sql/fun/SqlDatePartFunction.html - calcite-site - Git at Google

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 <div class="subTitle">org.apache.calcite.sql.fun</div>
 <h2 title="类 SqlDatePartFunction" class="title">类 SqlDatePartFunction</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>
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 <li><a href="../../../../../org/apache/calcite/sql/SqlFunction.html" title="org.apache.calcite.sql中的类">org.apache.calcite.sql.SqlFunction</a></li>
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 <li>org.apache.calcite.sql.fun.SqlDatePartFunction</li>
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 <pre>public class <span class="typeNameLabel">SqlDatePartFunction</span>
 extends <a href="../../../../../org/apache/calcite/sql/SqlFunction.html" title="org.apache.calcite.sql中的类">SqlFunction</a></pre>
 <div class="block">SqlDatePartFunction represents the SQL:1999 standard <code>YEAR</code>,
  <code>QUARTER</code>, <code>MONTH</code> and <code>DAY</code> functions.</div>
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 <h3>从类继承的字段&nbsp;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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 <th class="colOne" scope="col">构造器和说明</th>
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 <tr class="altColor">
 <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/sql/fun/SqlDatePartFunction.html#SqlDatePartFunction-java.lang.String-org.apache.calcite.avatica.util.TimeUnit-">SqlDatePartFunction</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="java.lang中的类或接口">String</a>&nbsp;name,
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 <caption><span id="t0" class="activeTableTab"><span>所有方法</span><span class="tabEnd">&nbsp;</span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">实例方法</a></span><span class="tabEnd">&nbsp;</span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">具体方法</a></span><span class="tabEnd">&nbsp;</span></span></caption>
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 <td class="colFirst"><code>boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/sql/fun/SqlDatePartFunction.html#checkOperandTypes-org.apache.calcite.sql.SqlCallBinding-boolean-">checkOperandTypes</a></span>(<a href="../../../../../org/apache/calcite/sql/SqlCallBinding.html" title="org.apache.calcite.sql中的类">SqlCallBinding</a>&nbsp;callBinding,
                  boolean&nbsp;throwOnFailure)</code>
 <div class="block">Checks that the operand values in a <a href="../../../../../org/apache/calcite/sql/SqlCall.html" title="org.apache.calcite.sql中的类"><code>SqlCall</code></a> to this operator are
  valid.</div>
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 <td class="colFirst"><code><a href="../../../../../org/apache/calcite/sql/SqlOperandCountRange.html" title="org.apache.calcite.sql中的接口">SqlOperandCountRange</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/sql/fun/SqlDatePartFunction.html#getOperandCountRange--">getOperandCountRange</a></span>()</code>
 <div class="block">Returns a constraint on the number of operands expected by this operator.</div>
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 <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="java.lang中的类或接口">String</a></code></td>
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 <div class="block">Returns a template describing how the operator signature is to be built.</div>
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 <td class="colFirst"><code><a href="../../../../../org/apache/calcite/sql/SqlNode.html" title="org.apache.calcite.sql中的类">SqlNode</a></code></td>
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 <h3>构造器详细资料</h3>
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 <h4>SqlDatePartFunction</h4>
 <pre>public&nbsp;SqlDatePartFunction(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="java.lang中的类或接口">String</a>&nbsp;name,
                            org.apache.calcite.avatica.util.TimeUnit&nbsp;timeUnit)</pre>
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 <h3>方法详细资料</h3>
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 <h4>rewriteCall</h4>
 <pre>public&nbsp;<a href="../../../../../org/apache/calcite/sql/SqlNode.html" title="org.apache.calcite.sql中的类">SqlNode</a>&nbsp;rewriteCall(<a href="../../../../../org/apache/calcite/sql/validate/SqlValidator.html" title="org.apache.calcite.sql.validate中的接口">SqlValidator</a>&nbsp;validator,
                            <a href="../../../../../org/apache/calcite/sql/SqlCall.html" title="org.apache.calcite.sql中的类">SqlCall</a>&nbsp;call)</pre>
 <div class="block"><span class="descfrmTypeLabel">从类复制的说明:&nbsp;<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>&nbsp;在类中&nbsp;<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>
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 <pre>public&nbsp;<a href="../../../../../org/apache/calcite/sql/SqlOperandCountRange.html" title="org.apache.calcite.sql中的接口">SqlOperandCountRange</a>&nbsp;getOperandCountRange()</pre>
 <div class="block"><span class="descfrmTypeLabel">从类复制的说明:&nbsp;<code><a href="../../../../../org/apache/calcite/sql/SqlOperator.html#getOperandCountRange--">SqlOperator</a></code></span></div>
 <div class="block">Returns a constraint on the number of operands expected by this operator.
  Subclasses may override this method; when they don't, the range is
  derived from the <a href="../../../../../org/apache/calcite/sql/type/SqlOperandTypeChecker.html" title="org.apache.calcite.sql.type中的接口"><code>SqlOperandTypeChecker</code></a> associated with this
  operator.</div>
 <dl>
 <dt><span class="overrideSpecifyLabel">覆盖:</span></dt>
 <dd><code><a href="../../../../../org/apache/calcite/sql/SqlOperator.html#getOperandCountRange--">getOperandCountRange</a></code>&nbsp;在类中&nbsp;<code><a href="../../../../../org/apache/calcite/sql/SqlOperator.html" title="org.apache.calcite.sql中的类">SqlOperator</a></code></dd>
 <dt><span class="returnLabel">返回:</span></dt>
 <dd>acceptable range</dd>
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 <pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="java.lang中的类或接口">String</a>&nbsp;getSignatureTemplate(int&nbsp;operandsCount)</pre>
 <div class="block"><span class="descfrmTypeLabel">从类复制的说明:&nbsp;<code><a href="../../../../../org/apache/calcite/sql/SqlOperator.html#getSignatureTemplate-int-">SqlOperator</a></code></span></div>
 <div class="block">Returns a template describing how the operator signature is to be built.
  E.g for the binary + operator the template looks like "{1} {0} {2}" {0}
  is the operator, subsequent numbers are operands.</div>
 <dl>
 <dt><span class="overrideSpecifyLabel">覆盖:</span></dt>
 <dd><code><a href="../../../../../org/apache/calcite/sql/SqlOperator.html#getSignatureTemplate-int-">getSignatureTemplate</a></code>&nbsp;在类中&nbsp;<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>operandsCount</code> - is used with functions that can take a variable
                       number of operands</dd>
 <dt><span class="returnLabel">返回:</span></dt>
 <dd>signature template, or null to indicate that a default template
  will suffice</dd>
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 <pre>public&nbsp;boolean&nbsp;checkOperandTypes(<a href="../../../../../org/apache/calcite/sql/SqlCallBinding.html" title="org.apache.calcite.sql中的类">SqlCallBinding</a>&nbsp;callBinding,
                                  boolean&nbsp;throwOnFailure)</pre>
 <div class="block"><span class="descfrmTypeLabel">从类复制的说明:&nbsp;<code><a href="../../../../../org/apache/calcite/sql/SqlOperator.html#checkOperandTypes-org.apache.calcite.sql.SqlCallBinding-boolean-">SqlOperator</a></code></span></div>
 <div class="block">Checks that the operand values in a <a href="../../../../../org/apache/calcite/sql/SqlCall.html" title="org.apache.calcite.sql中的类"><code>SqlCall</code></a> to this operator are
  valid. Subclasses must either override this method or supply an instance
  of <a href="../../../../../org/apache/calcite/sql/type/SqlOperandTypeChecker.html" title="org.apache.calcite.sql.type中的接口"><code>SqlOperandTypeChecker</code></a> to the constructor.</div>
 <dl>
 <dt><span class="overrideSpecifyLabel">覆盖:</span></dt>
 <dd><code><a href="../../../../../org/apache/calcite/sql/SqlOperator.html#checkOperandTypes-org.apache.calcite.sql.SqlCallBinding-boolean-">checkOperandTypes</a></code>&nbsp;在类中&nbsp;<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>callBinding</code> - description of call</dd>
 <dd><code>throwOnFailure</code> - whether to throw an exception if check fails
                        (otherwise returns false in that case)</dd>
 <dt><span class="returnLabel">返回:</span></dt>
 <dd>whether check succeeded</dd>
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