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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 PigRelSqlUdfs" class="title">Class PigRelSqlUdfs</h2> |
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| <li>java.lang.Object</li> |
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| <li>org.apache.calcite.piglet.PigRelSqlUdfs</li> |
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| <pre>public class <span class="typeNameLabel">PigRelSqlUdfs</span> |
| extends java.lang.Object</pre> |
| <div class="block">User-defined functions (<a href="../sql/validate/SqlUserDefinedFunction.html" title="class in org.apache.calcite.sql.validate"><code>UDFs</code></a>) |
| needed for Pig-to-<a href="../rel/RelNode.html" title="interface in org.apache.calcite.rel"><code>RelNode</code></a> translation.</div> |
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| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colSecond" scope="col">Field</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>(package private) static <a href="../sql/validate/SqlUserDefinedFunction.html" title="class in org.apache.calcite.sql.validate">SqlUserDefinedFunction</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#MULTISET_PROJECTION">MULTISET_PROJECTION</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">Multiset projection projects a subset of columns from the component type |
| of a multiset type.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private static <a href="../schema/ScalarFunction.html" title="interface in org.apache.calcite.schema">ScalarFunction</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#MULTISET_PROJECTION_FUNC">MULTISET_PROJECTION_FUNC</a></span></code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private static <a href="../schema/ScalarFunction.html" title="interface in org.apache.calcite.schema">ScalarFunction</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#PIG_BAG_FUNC">PIG_BAG_FUNC</a></span></code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private static <a href="../schema/ScalarFunction.html" title="interface in org.apache.calcite.schema">ScalarFunction</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#PIG_TUPLE_FUNC">PIG_TUPLE_FUNC</a></span></code></th> |
| <td class="colLast"> </td> |
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| <td class="colFirst"><code>private </code></td> |
| <th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E()">PigRelSqlUdfs</a></span>()</code></th> |
| <td class="colLast"> </td> |
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| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
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| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>static org.apache.pig.data.Tuple</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#buildBag(java.lang.Object...)">buildBag</a></span>​(java.lang.Object... elements)</code></th> |
| <td class="colLast"> |
| <div class="block">Implementation for PIG_BAG functions.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>static org.apache.pig.data.Tuple</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#buildTuple(java.lang.Object...)">buildTuple</a></span>​(java.lang.Object... elements)</code></th> |
| <td class="colLast"> |
| <div class="block">Implementation for PIG_TUPLE functions.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>(package private) static <a href="../sql/validate/SqlUserDefinedFunction.html" title="class in org.apache.calcite.sql.validate">SqlUserDefinedFunction</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#createGeneralPigUdf(java.lang.String,java.lang.reflect.Method,org.apache.pig.FuncSpec,org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.type.RelDataType)">createGeneralPigUdf</a></span>​(java.lang.String udfName, |
| java.lang.reflect.Method method, |
| org.apache.pig.FuncSpec funcSpec, |
| <a href="../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> inputType, |
| <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">Creates a generic SqlUDF operator from a Pig UDF.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>(package private) static <a href="../sql/validate/SqlUserDefinedFunction.html" title="class in org.apache.calcite.sql.validate">SqlUserDefinedFunction</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#createPigBagUDF(com.google.common.collect.ImmutableList)">createPigBagUDF</a></span>​(com.google.common.collect.ImmutableList<<a href="../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> operands)</code></th> |
| <td class="colLast"> |
| <div class="block">Creates a Pig DataBag from a list of relational operands.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>(package private) static <a href="../sql/validate/SqlUserDefinedFunction.html" title="class in org.apache.calcite.sql.validate">SqlUserDefinedFunction</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#createPigTupleUDF(com.google.common.collect.ImmutableList)">createPigTupleUDF</a></span>​(com.google.common.collect.ImmutableList<<a href="../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> operands)</code></th> |
| <td class="colLast"> |
| <div class="block">Creates a Pig Tuple from a list of relational operands.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>private static <a href="../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getRelDataType(org.apache.calcite.schema.ScalarFunction)">getRelDataType</a></span>​(<a href="../schema/ScalarFunction.html" title="interface in org.apache.calcite.schema">ScalarFunction</a> function)</code></th> |
| <td class="colLast"> |
| <div class="block">Gets the return data type for a given function.</div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>private static java.util.List<<a href="../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getRelDataTypes(com.google.common.collect.ImmutableList)">getRelDataTypes</a></span>​(com.google.common.collect.ImmutableList<<a href="../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> operands)</code></th> |
| <td class="colLast"> |
| <div class="block">Helper method to return a list of RelDataType for a given list of relational operands</div> |
| </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>private static java.util.List<<a href="../sql/type/SqlTypeFamily.html" title="enum in org.apache.calcite.sql.type">SqlTypeFamily</a>></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getTypeFamilies(com.google.common.collect.ImmutableList)">getTypeFamilies</a></span>​(com.google.common.collect.ImmutableList<<a href="../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> operands)</code></th> |
| <td class="colLast"> |
| <div class="block">Helper method to return a list of SqlTypeFamily for a given list of relational operands</div> |
| </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code>private static <a href="../sql/type/SqlReturnTypeInference.html" title="interface in org.apache.calcite.sql.type">SqlReturnTypeInference</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#infer(org.apache.calcite.schema.ScalarFunction)">infer</a></span>​(<a href="../schema/ScalarFunction.html" title="interface in org.apache.calcite.schema">ScalarFunction</a> function)</code></th> |
| <td class="colLast"> |
| <div class="block">Gets the SqlReturnTypeInference that can infer the return type from a |
| function.</div> |
| </td> |
| </tr> |
| <tr id="i9" class="rowColor"> |
| <td class="colFirst"><code>private static <a href="../sql/type/SqlOperandTypeChecker.html" title="interface in org.apache.calcite.sql.type">SqlOperandTypeChecker</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#multisetProjectionCheck()">multisetProjectionCheck</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">Returns a <a href="../sql/type/SqlOperandTypeChecker.html" title="interface in org.apache.calcite.sql.type"><code>SqlOperandTypeChecker</code></a> for multiset projection operator.</div> |
| </td> |
| </tr> |
| <tr id="i10" class="altColor"> |
| <td class="colFirst"><code>private static <a href="../sql/type/SqlReturnTypeInference.html" title="interface in org.apache.calcite.sql.type">SqlReturnTypeInference</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#multisetProjectionInfer()">multisetProjectionInfer</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">Returns a <a href="../sql/type/SqlReturnTypeInference.html" title="interface in org.apache.calcite.sql.type"><code>SqlReturnTypeInference</code></a> for multiset projection operator.</div> |
| </td> |
| </tr> |
| <tr id="i11" class="rowColor"> |
| <td class="colFirst"><code>static java.util.List</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#projectMultiset(java.lang.Object...)">projectMultiset</a></span>​(java.lang.Object... objects)</code></th> |
| <td class="colLast"> |
| <div class="block">Implementation for BAG_PROJECTION functions.</div> |
| </td> |
| </tr> |
| </table> |
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| </a> |
| <h3>Methods inherited from class java.lang.Object</h3> |
| <code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li> |
| </ul> |
| </li> |
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| </section> |
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| <h4>PIG_TUPLE_FUNC</h4> |
| <pre>private static final <a href="../schema/ScalarFunction.html" title="interface in org.apache.calcite.schema">ScalarFunction</a> PIG_TUPLE_FUNC</pre> |
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| <h4>PIG_BAG_FUNC</h4> |
| <pre>private static final <a href="../schema/ScalarFunction.html" title="interface in org.apache.calcite.schema">ScalarFunction</a> PIG_BAG_FUNC</pre> |
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| <h4>MULTISET_PROJECTION_FUNC</h4> |
| <pre>private static final <a href="../schema/ScalarFunction.html" title="interface in org.apache.calcite.schema">ScalarFunction</a> MULTISET_PROJECTION_FUNC</pre> |
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| <h4>MULTISET_PROJECTION</h4> |
| <pre>static final <a href="../sql/validate/SqlUserDefinedFunction.html" title="class in org.apache.calcite.sql.validate">SqlUserDefinedFunction</a> MULTISET_PROJECTION</pre> |
| <div class="block">Multiset projection projects a subset of columns from the component type |
| of a multiset type. The result is still a multiset but the component |
| type only has a subset of columns of the original component type |
| |
| <p>For example, given a multiset type |
| <code>M = [(A: int, B: double, C: varchar)]</code>, |
| a projection |
| <code>MULTISET_PROJECTION(M, A, C)</code> |
| gives a new multiset |
| <code>N = [(A: int, C: varchar)]</code>.</div> |
| </li> |
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| <pre>private PigRelSqlUdfs()</pre> |
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| <a id="createPigTupleUDF(com.google.common.collect.ImmutableList)"> |
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| <h4>createPigTupleUDF</h4> |
| <pre class="methodSignature">static <a href="../sql/validate/SqlUserDefinedFunction.html" title="class in org.apache.calcite.sql.validate">SqlUserDefinedFunction</a> createPigTupleUDF​(com.google.common.collect.ImmutableList<<a href="../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> operands)</pre> |
| <div class="block">Creates a Pig Tuple from a list of relational operands.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>operands</code> - Relational operands</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Pig Tuple SqlUDF</dd> |
| </dl> |
| </li> |
| </ul> |
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| <h4>createPigBagUDF</h4> |
| <pre class="methodSignature">static <a href="../sql/validate/SqlUserDefinedFunction.html" title="class in org.apache.calcite.sql.validate">SqlUserDefinedFunction</a> createPigBagUDF​(com.google.common.collect.ImmutableList<<a href="../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> operands)</pre> |
| <div class="block">Creates a Pig DataBag from a list of relational operands.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>operands</code> - Relational operands</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Pig DataBag SqlUDF</dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="createGeneralPigUdf(java.lang.String,java.lang.reflect.Method,org.apache.pig.FuncSpec,org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.type.RelDataType)"> |
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| <h4>createGeneralPigUdf</h4> |
| <pre class="methodSignature">static <a href="../sql/validate/SqlUserDefinedFunction.html" title="class in org.apache.calcite.sql.validate">SqlUserDefinedFunction</a> createGeneralPigUdf​(java.lang.String udfName, |
| java.lang.reflect.Method method, |
| org.apache.pig.FuncSpec funcSpec, |
| <a href="../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> inputType, |
| <a href="../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> returnType)</pre> |
| <div class="block">Creates a generic SqlUDF operator from a Pig UDF.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>udfName</code> - Name of the UDF</dd> |
| <dd><code>method</code> - Method "exec" for implementing the UDF</dd> |
| <dd><code>funcSpec</code> - Pig Funcspec</dd> |
| <dd><code>inputType</code> - Argument type for the input</dd> |
| <dd><code>returnType</code> - Function return data type</dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="multisetProjectionInfer()"> |
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| </a> |
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| <h4>multisetProjectionInfer</h4> |
| <pre class="methodSignature">private static <a href="../sql/type/SqlReturnTypeInference.html" title="interface in org.apache.calcite.sql.type">SqlReturnTypeInference</a> multisetProjectionInfer()</pre> |
| <div class="block">Returns a <a href="../sql/type/SqlReturnTypeInference.html" title="interface in org.apache.calcite.sql.type"><code>SqlReturnTypeInference</code></a> for multiset projection operator.</div> |
| </li> |
| </ul> |
| <a id="multisetProjectionCheck()"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>multisetProjectionCheck</h4> |
| <pre class="methodSignature">private static <a href="../sql/type/SqlOperandTypeChecker.html" title="interface in org.apache.calcite.sql.type">SqlOperandTypeChecker</a> multisetProjectionCheck()</pre> |
| <div class="block">Returns a <a href="../sql/type/SqlOperandTypeChecker.html" title="interface in org.apache.calcite.sql.type"><code>SqlOperandTypeChecker</code></a> for multiset projection operator.</div> |
| </li> |
| </ul> |
| <a id="getTypeFamilies(com.google.common.collect.ImmutableList)"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getTypeFamilies</h4> |
| <pre class="methodSignature">private static java.util.List<<a href="../sql/type/SqlTypeFamily.html" title="enum in org.apache.calcite.sql.type">SqlTypeFamily</a>> getTypeFamilies​(com.google.common.collect.ImmutableList<<a href="../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> operands)</pre> |
| <div class="block">Helper method to return a list of SqlTypeFamily for a given list of relational operands</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>operands</code> - List of relational operands</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>List of SqlTypeFamilies</dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="getRelDataTypes(com.google.common.collect.ImmutableList)"> |
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| </a> |
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| <h4>getRelDataTypes</h4> |
| <pre class="methodSignature">private static java.util.List<<a href="../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>> getRelDataTypes​(com.google.common.collect.ImmutableList<<a href="../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> operands)</pre> |
| <div class="block">Helper method to return a list of RelDataType for a given list of relational operands</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>operands</code> - List of relational operands</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>List of RelDataTypes</dd> |
| </dl> |
| </li> |
| </ul> |
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| <h4>infer</h4> |
| <pre class="methodSignature">private static <a href="../sql/type/SqlReturnTypeInference.html" title="interface in org.apache.calcite.sql.type">SqlReturnTypeInference</a> infer​(<a href="../schema/ScalarFunction.html" title="interface in org.apache.calcite.schema">ScalarFunction</a> function)</pre> |
| <div class="block">Gets the SqlReturnTypeInference that can infer the return type from a |
| function.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>function</code> - ScalarFunction</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>SqlReturnTypeInference</dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="getRelDataType(org.apache.calcite.schema.ScalarFunction)"> |
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| <h4>getRelDataType</h4> |
| <pre class="methodSignature">private static <a href="../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> getRelDataType​(<a href="../schema/ScalarFunction.html" title="interface in org.apache.calcite.schema">ScalarFunction</a> function)</pre> |
| <div class="block">Gets the return data type for a given function.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>function</code> - ScalarFunction</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>returned data type</dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="buildTuple(java.lang.Object...)"> |
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| <h4>buildTuple</h4> |
| <pre class="methodSignature">public static org.apache.pig.data.Tuple buildTuple​(java.lang.Object... elements)</pre> |
| <div class="block">Implementation for PIG_TUPLE functions. Builds a Pig Tuple from |
| an array of objects</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>elements</code> - Array of element objects</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Pig Tuple</dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="buildBag(java.lang.Object...)"> |
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| </a> |
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| <h4>buildBag</h4> |
| <pre class="methodSignature">public static org.apache.pig.data.Tuple buildBag​(java.lang.Object... elements)</pre> |
| <div class="block">Implementation for PIG_BAG functions. Builds a Pig DataBag from |
| the corresponding input</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>elements</code> - Input that contains a bag</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Pig Tuple</dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="projectMultiset(java.lang.Object...)"> |
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| </a> |
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| <h4>projectMultiset</h4> |
| <pre class="methodSignature">public static java.util.List projectMultiset​(java.lang.Object... objects)</pre> |
| <div class="block">Implementation for BAG_PROJECTION functions. Builds a new multiset by |
| projecting certain columns from another multiset.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>objects</code> - Input argument, the first one is a multiset, the remaining |
| are indexes of column to project.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>The projected multiset</dd> |
| </dl> |
| </li> |
| </ul> |
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