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<div class="subTitle">org.apache.calcite.adapter.druid</div>
<h2 title="类 ExtractOperatorConversion" class="title">类 ExtractOperatorConversion</h2>
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<li>org.apache.calcite.adapter.druid.ExtractOperatorConversion</li>
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<dt>所有已实现的接口:</dt>
<dd><a href="../../../../../org/apache/calcite/adapter/druid/DruidSqlOperatorConverter.html" title="org.apache.calcite.adapter.druid中的接口">DruidSqlOperatorConverter</a></dd>
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<pre>public class <span class="typeNameLabel">ExtractOperatorConversion</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>
implements <a href="../../../../../org/apache/calcite/adapter/druid/DruidSqlOperatorConverter.html" title="org.apache.calcite.adapter.druid中的接口">DruidSqlOperatorConverter</a></pre>
<div class="block">Time extract operator conversion for expressions like EXTRACT(timeUnit FROM arg)
Unit can be SECOND, MINUTE, HOUR, DAY (day of month),
DOW (day of week), DOY (day of year), WEEK (week of week year),
MONTH (1 through 12), QUARTER (1 through 4), or YEAR</div>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/adapter/druid/ExtractOperatorConversion.html#ExtractOperatorConversion--">ExtractOperatorConversion</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code><a href="../../../../../org/apache/calcite/sql/SqlOperator.html" title="org.apache.calcite.sql中的类">SqlOperator</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/adapter/druid/ExtractOperatorConversion.html#calciteOperator--">calciteOperator</a></span>()</code>
<div class="block">Returns the calcite SQL operator corresponding to Druid 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>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/adapter/druid/ExtractOperatorConversion.html#toDruidExpression-org.apache.calcite.rex.RexNode-org.apache.calcite.rel.type.RelDataType-org.apache.calcite.adapter.druid.DruidQuery-">toDruidExpression</a></span>(<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a>&nbsp;rexNode,
<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;rowType,
<a href="../../../../../org/apache/calcite/adapter/druid/DruidQuery.html" title="org.apache.calcite.adapter.druid中的类">DruidQuery</a>&nbsp;query)</code>
<div class="block">Translate rexNode to valid Druid expression.</div>
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<h4>ExtractOperatorConversion</h4>
<pre>public&nbsp;ExtractOperatorConversion()</pre>
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<h4>calciteOperator</h4>
<pre>public&nbsp;<a href="../../../../../org/apache/calcite/sql/SqlOperator.html" title="org.apache.calcite.sql中的类">SqlOperator</a>&nbsp;calciteOperator()</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../../org/apache/calcite/adapter/druid/DruidSqlOperatorConverter.html#calciteOperator--">DruidSqlOperatorConverter</a></code></span></div>
<div class="block">Returns the calcite SQL operator corresponding to Druid operator.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/adapter/druid/DruidSqlOperatorConverter.html#calciteOperator--">calciteOperator</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../../org/apache/calcite/adapter/druid/DruidSqlOperatorConverter.html" title="org.apache.calcite.adapter.druid中的接口">DruidSqlOperatorConverter</a></code></dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>operator</dd>
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<a name="toDruidExpression-org.apache.calcite.rex.RexNode-org.apache.calcite.rel.type.RelDataType-org.apache.calcite.adapter.druid.DruidQuery-">
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<h4>toDruidExpression</h4>
<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;toDruidExpression(<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a>&nbsp;rexNode,
<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;rowType,
<a href="../../../../../org/apache/calcite/adapter/druid/DruidQuery.html" title="org.apache.calcite.adapter.druid中的类">DruidQuery</a>&nbsp;query)</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../../org/apache/calcite/adapter/druid/DruidSqlOperatorConverter.html#toDruidExpression-org.apache.calcite.rex.RexNode-org.apache.calcite.rel.type.RelDataType-org.apache.calcite.adapter.druid.DruidQuery-">DruidSqlOperatorConverter</a></code></span></div>
<div class="block">Translate rexNode to valid Druid expression.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/adapter/druid/DruidSqlOperatorConverter.html#toDruidExpression-org.apache.calcite.rex.RexNode-org.apache.calcite.rel.type.RelDataType-org.apache.calcite.adapter.druid.DruidQuery-">toDruidExpression</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../../org/apache/calcite/adapter/druid/DruidSqlOperatorConverter.html" title="org.apache.calcite.adapter.druid中的接口">DruidSqlOperatorConverter</a></code></dd>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>rexNode</code> - rexNode to translate to Druid expression</dd>
<dd><code>rowType</code> - row type associated with rexNode</dd>
<dd><code>query</code> - druid query used to figure out configs/fields related like timeZone</dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>valid Druid expression or null if it can not convert the rexNode</dd>
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