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| <div class="subTitle"><span class="packageLabelInType">Package</span> <a href="package-summary.html">org.apache.calcite.piglet</a></div> |
| <h2 title="Class PigRelUdfConverter" class="title">Class PigRelUdfConverter</h2> |
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| <ul class="inheritance"> |
| <li>java.lang.Object</li> |
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| <li>org.apache.calcite.piglet.PigRelUdfConverter</li> |
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| <pre>class <span class="typeNameLabel">PigRelUdfConverter</span> |
| extends java.lang.Object</pre> |
| <div class="block">This class maps a Pig UDF to a corresponding SQL built-in function/operator. |
| If such mapping is not available, it creates a wrapper to allow SQL engines |
| call Pig UDFs directly.</div> |
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| <td class="colFirst"><code>private static java.util.Map<java.lang.String,​<a href="../sql/SqlAggFunction.html" title="class in org.apache.calcite.sql">SqlAggFunction</a>></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#BUILTIN_AGG_FUNC">BUILTIN_AGG_FUNC</a></span></code></th> |
| <td class="colLast"> </td> |
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| <tr class="rowColor"> |
| <td class="colFirst"><code>private static java.util.Map<java.lang.String,​<a href="../sql/SqlOperator.html" title="class in org.apache.calcite.sql">SqlOperator</a>></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#BUILTIN_FUNC">BUILTIN_FUNC</a></span></code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private static <a href="PigUdfFinder.html" title="class in org.apache.calcite.piglet">PigUdfFinder</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#PIG_UDF_FINDER">PIG_UDF_FINDER</a></span></code></th> |
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| <td class="colFirst"><code>private </code></td> |
| <th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E()">PigRelUdfConverter</a></span>()</code></th> |
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| <td class="colFirst"><code>(package private) static <a href="../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#convertPigFunction(org.apache.calcite.piglet.PigRelBuilder,org.apache.pig.FuncSpec,com.google.common.collect.ImmutableList,org.apache.calcite.rel.type.RelDataType)">convertPigFunction</a></span>​(<a href="PigRelBuilder.html" title="class in org.apache.calcite.piglet">PigRelBuilder</a> builder, |
| org.apache.pig.FuncSpec pigFunc, |
| com.google.common.collect.ImmutableList<<a href="../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> operands, |
| <a href="../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> returnType)</code></th> |
| <td class="colLast"> |
| <div class="block">Converts a Pig UDF, given its <code>FuncSpec</code> and a list of relational |
| operands (function arguments).</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>(package private) static <a href="../sql/SqlAggFunction.html" title="class in org.apache.calcite.sql">SqlAggFunction</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getSqlAggFuncForPigUdf(org.apache.calcite.rex.RexCall)">getSqlAggFuncForPigUdf</a></span>​(<a href="../rex/RexCall.html" title="class in org.apache.calcite.rex">RexCall</a> call)</code></th> |
| <td class="colLast"> |
| <div class="block">Gets the <a href="../sql/SqlAggFunction.html" title="class in org.apache.calcite.sql"><code>SqlAggFunction</code></a> for the corresponding Pig aggregate |
| UDF call; returns null for invalid rex call.</div> |
| </td> |
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| <code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li> |
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| <h4>PIG_UDF_FINDER</h4> |
| <pre>private static final <a href="PigUdfFinder.html" title="class in org.apache.calcite.piglet">PigUdfFinder</a> PIG_UDF_FINDER</pre> |
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| <pre>private static final java.util.Map<java.lang.String,​<a href="../sql/SqlOperator.html" title="class in org.apache.calcite.sql">SqlOperator</a>> BUILTIN_FUNC</pre> |
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| <h4>BUILTIN_AGG_FUNC</h4> |
| <pre>private static final java.util.Map<java.lang.String,​<a href="../sql/SqlAggFunction.html" title="class in org.apache.calcite.sql">SqlAggFunction</a>> BUILTIN_AGG_FUNC</pre> |
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| <h4>PigRelUdfConverter</h4> |
| <pre>private PigRelUdfConverter()</pre> |
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| <a id="convertPigFunction(org.apache.calcite.piglet.PigRelBuilder,org.apache.pig.FuncSpec,com.google.common.collect.ImmutableList,org.apache.calcite.rel.type.RelDataType)"> |
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| <h4>convertPigFunction</h4> |
| <pre class="methodSignature">static <a href="../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a> convertPigFunction​(<a href="PigRelBuilder.html" title="class in org.apache.calcite.piglet">PigRelBuilder</a> builder, |
| org.apache.pig.FuncSpec pigFunc, |
| com.google.common.collect.ImmutableList<<a href="../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> operands, |
| <a href="../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> returnType) |
| throws org.apache.pig.impl.logicalLayer.FrontendException</pre> |
| <div class="block">Converts a Pig UDF, given its <code>FuncSpec</code> and a list of relational |
| operands (function arguments). To call this function, the arguments of |
| Pig functions need to be converted into the relational types before.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>builder</code> - The relational builder</dd> |
| <dd><code>pigFunc</code> - Pig function description</dd> |
| <dd><code>operands</code> - Relational operands for the function</dd> |
| <dd><code>returnType</code> - Function return data type</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>The SQL calls equivalent to the Pig function</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code>org.apache.pig.impl.logicalLayer.FrontendException</code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="getSqlAggFuncForPigUdf(org.apache.calcite.rex.RexCall)"> |
| <!-- --> |
| </a> |
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| <h4>getSqlAggFuncForPigUdf</h4> |
| <pre class="methodSignature">static <a href="../sql/SqlAggFunction.html" title="class in org.apache.calcite.sql">SqlAggFunction</a> getSqlAggFuncForPigUdf​(<a href="../rex/RexCall.html" title="class in org.apache.calcite.rex">RexCall</a> call)</pre> |
| <div class="block">Gets the <a href="../sql/SqlAggFunction.html" title="class in org.apache.calcite.sql"><code>SqlAggFunction</code></a> for the corresponding Pig aggregate |
| UDF call; returns null for invalid rex call.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>call</code> - Pig aggregate UDF call</dd> |
| </dl> |
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