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<div class="subTitle"><span class="packageLabelInType">Package</span>&nbsp;<a href="package-summary.html">org.apache.calcite.adapter.druid</a></div>
<h2 title="Class DruidExpressions" class="title">Class DruidExpressions</h2>
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<li>java.lang.Object</li>
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<li>org.apache.calcite.adapter.druid.DruidExpressions</li>
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<pre>public class <span class="typeNameLabel">DruidExpressions</span>
extends java.lang.Object</pre>
<div class="block">Expression utility class to transform Calcite expressions to Druid expressions when possible.</div>
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<td class="colFirst"><code>(package private) static java.util.Map&lt;<a href="../../sql/type/SqlTypeName.html" title="enum in org.apache.calcite.sql.type">SqlTypeName</a>,&#8203;<a href="DruidType.html" title="enum in org.apache.calcite.adapter.druid">DruidType</a>&gt;</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#EXPRESSION_TYPES">EXPRESSION_TYPES</a></span></code></th>
<td class="colLast">
<div class="block">Type mapping between Calcite SQL family types and native Druid expression types</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>private static char[]</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#SAFE_CHARS">SAFE_CHARS</a></span></code></th>
<td class="colLast">
<div class="block">Druid expression safe chars, must be sorted.</div>
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<td class="colFirst"><code>private </code></td>
<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E()">DruidExpressions</a></span>()</code></th>
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<td class="colFirst"><code>static java.lang.String</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#applyTimeExtract(java.lang.String,java.lang.String,java.util.TimeZone)">applyTimeExtract</a></span>&#8203;(java.lang.String&nbsp;timeExpression,
java.lang.String&nbsp;druidUnit,
java.util.TimeZone&nbsp;timeZone)</code></th>
<td class="colLast">&nbsp;</td>
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<tr id="i1" class="rowColor">
<td class="colFirst"><code>static java.lang.String</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#applyTimestampCeil(java.lang.String,java.lang.String,java.lang.String,java.util.TimeZone)">applyTimestampCeil</a></span>&#8203;(java.lang.String&nbsp;input,
java.lang.String&nbsp;granularity,
java.lang.String&nbsp;origin,
java.util.TimeZone&nbsp;timeZone)</code></th>
<td class="colLast">&nbsp;</td>
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<tr id="i2" class="altColor">
<td class="colFirst"><code>static java.lang.String</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#applyTimestampFloor(java.lang.String,java.lang.String,java.lang.String,java.util.TimeZone)">applyTimestampFloor</a></span>&#8203;(java.lang.String&nbsp;input,
java.lang.String&nbsp;granularity,
java.lang.String&nbsp;origin,
java.util.TimeZone&nbsp;timeZone)</code></th>
<td class="colLast">&nbsp;</td>
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<tr id="i3" class="rowColor">
<td class="colFirst"><code>private static java.lang.String</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#escape(java.lang.String)">escape</a></span>&#8203;(java.lang.String&nbsp;s)</code></th>
<td class="colLast">&nbsp;</td>
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<tr id="i4" class="altColor">
<td class="colFirst"><code>static java.lang.String</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#fromColumn(java.lang.String)">fromColumn</a></span>&#8203;(java.lang.String&nbsp;columnName)</code></th>
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<td class="colFirst"><code>static java.lang.String</code></td>
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java.util.List&lt;java.lang.String&gt;&nbsp;args)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code>static java.lang.String</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#nAryOperatorCall(java.lang.String,java.util.List)">nAryOperatorCall</a></span>&#8203;(java.lang.String&nbsp;druidOperator,
java.util.List&lt;java.lang.String&gt;&nbsp;args)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code>static java.lang.String</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#nullLiteral()">nullLiteral</a></span>()</code></th>
<td class="colLast">&nbsp;</td>
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<tr id="i8" class="altColor">
<td class="colFirst"><code>static java.lang.String</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#numberLiteral(java.lang.Number)">numberLiteral</a></span>&#8203;(java.lang.Number&nbsp;n)</code></th>
<td class="colLast">&nbsp;</td>
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<tr id="i9" class="rowColor">
<td class="colFirst"><code>static java.lang.String</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#stringLiteral(java.lang.String)">stringLiteral</a></span>&#8203;(java.lang.String&nbsp;s)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i10" class="altColor">
<td class="colFirst"><code>static java.lang.String</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#toDruidExpression(org.apache.calcite.rex.RexNode,org.apache.calcite.rel.type.RelDataType,org.apache.calcite.adapter.druid.DruidQuery)">toDruidExpression</a></span>&#8203;(<a href="../../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&nbsp;rexNode,
<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;inputRowType,
<a href="DruidQuery.html" title="class in org.apache.calcite.adapter.druid">DruidQuery</a>&nbsp;druidRel)</code></th>
<td class="colLast">
<div class="block">Translates Calcite rexNode to Druid Expression when possible</div>
</td>
</tr>
<tr id="i11" class="rowColor">
<td class="colFirst"><code>static java.util.List&lt;java.lang.String&gt;</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#toDruidExpressions(org.apache.calcite.adapter.druid.DruidQuery,org.apache.calcite.rel.type.RelDataType,java.util.List)">toDruidExpressions</a></span>&#8203;(<a href="DruidQuery.html" title="class in org.apache.calcite.adapter.druid">DruidQuery</a>&nbsp;druidRel,
<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;rowType,
java.util.List&lt;<a href="../../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&gt;&nbsp;rexNodes)</code></th>
<td class="colLast">
<div class="block">Translate a list of Calcite <code>RexNode</code> to Druid expressions.</div>
</td>
</tr>
</table>
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<h3>Methods inherited from class&nbsp;java.lang.Object</h3>
<code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li>
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<h4>EXPRESSION_TYPES</h4>
<pre>static final&nbsp;java.util.Map&lt;<a href="../../sql/type/SqlTypeName.html" title="enum in org.apache.calcite.sql.type">SqlTypeName</a>,&#8203;<a href="DruidType.html" title="enum in org.apache.calcite.adapter.druid">DruidType</a>&gt; EXPRESSION_TYPES</pre>
<div class="block">Type mapping between Calcite SQL family types and native Druid expression types</div>
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<h4>SAFE_CHARS</h4>
<pre>private static final&nbsp;char[] SAFE_CHARS</pre>
<div class="block">Druid expression safe chars, must be sorted.</div>
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<h4>DruidExpressions</h4>
<pre>private&nbsp;DruidExpressions()</pre>
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<h4>toDruidExpression</h4>
<pre class="methodSignature">@Nullable
public static&nbsp;java.lang.String&nbsp;toDruidExpression&#8203;(<a href="../../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&nbsp;rexNode,
<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;inputRowType,
<a href="DruidQuery.html" title="class in org.apache.calcite.adapter.druid">DruidQuery</a>&nbsp;druidRel)</pre>
<div class="block">Translates Calcite rexNode to Druid Expression when possible</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>rexNode</code> - rexNode to convert to a Druid Expression</dd>
<dd><code>inputRowType</code> - input row type of the rexNode to translate</dd>
<dd><code>druidRel</code> - Druid query</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Druid Expression or null when can not convert the RexNode</dd>
</dl>
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<h4>fromColumn</h4>
<pre class="methodSignature">public static&nbsp;java.lang.String&nbsp;fromColumn&#8203;(java.lang.String&nbsp;columnName)</pre>
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<pre class="methodSignature">public static&nbsp;java.lang.String&nbsp;nullLiteral()</pre>
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<pre class="methodSignature">public static&nbsp;java.lang.String&nbsp;numberLiteral&#8203;(java.lang.Number&nbsp;n)</pre>
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<pre class="methodSignature">public static&nbsp;java.lang.String&nbsp;stringLiteral&#8203;(java.lang.String&nbsp;s)</pre>
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<h4>escape</h4>
<pre class="methodSignature">private static&nbsp;java.lang.String&nbsp;escape&#8203;(java.lang.String&nbsp;s)</pre>
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<pre class="methodSignature">public static&nbsp;java.lang.String&nbsp;functionCall&#8203;(java.lang.String&nbsp;functionName,
java.util.List&lt;java.lang.String&gt;&nbsp;args)</pre>
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<pre class="methodSignature">public static&nbsp;java.lang.String&nbsp;nAryOperatorCall&#8203;(java.lang.String&nbsp;druidOperator,
java.util.List&lt;java.lang.String&gt;&nbsp;args)</pre>
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<a id="toDruidExpressions(org.apache.calcite.adapter.druid.DruidQuery,org.apache.calcite.rel.type.RelDataType,java.util.List)">
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<h4>toDruidExpressions</h4>
<pre class="methodSignature">@Nullable
public static&nbsp;java.util.List&lt;java.lang.String&gt;&nbsp;toDruidExpressions&#8203;(<a href="DruidQuery.html" title="class in org.apache.calcite.adapter.druid">DruidQuery</a>&nbsp;druidRel,
<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;rowType,
java.util.List&lt;<a href="../../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&gt;&nbsp;rexNodes)</pre>
<div class="block">Translate a list of Calcite <code>RexNode</code> to Druid expressions.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>rexNodes</code> - list of Calcite expressions meant to be applied on top of the rows</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>list of Druid expressions in the same order as rexNodes, or null if not possible.
If a non-null list is returned, all elements will be non-null.</dd>
</dl>
</li>
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<a id="applyTimestampFloor(java.lang.String,java.lang.String,java.lang.String,java.util.TimeZone)">
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<h4>applyTimestampFloor</h4>
<pre class="methodSignature">public static&nbsp;java.lang.String&nbsp;applyTimestampFloor&#8203;(java.lang.String&nbsp;input,
java.lang.String&nbsp;granularity,
java.lang.String&nbsp;origin,
java.util.TimeZone&nbsp;timeZone)</pre>
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<h4>applyTimestampCeil</h4>
<pre class="methodSignature">public static&nbsp;java.lang.String&nbsp;applyTimestampCeil&#8203;(java.lang.String&nbsp;input,
java.lang.String&nbsp;granularity,
java.lang.String&nbsp;origin,
java.util.TimeZone&nbsp;timeZone)</pre>
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<h4>applyTimeExtract</h4>
<pre class="methodSignature">public static&nbsp;java.lang.String&nbsp;applyTimeExtract&#8203;(java.lang.String&nbsp;timeExpression,
java.lang.String&nbsp;druidUnit,
java.util.TimeZone&nbsp;timeZone)</pre>
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