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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 PigToSqlAggregateRule" class="title">Class PigToSqlAggregateRule</h2> |
| </div> |
| <div class="contentContainer"> |
| <ul class="inheritance"> |
| <li>java.lang.Object</li> |
| <li> |
| <ul class="inheritance"> |
| <li><a href="../plan/RelOptRule.html" title="class in org.apache.calcite.plan">org.apache.calcite.plan.RelOptRule</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li>org.apache.calcite.piglet.PigToSqlAggregateRule</li> |
| </ul> |
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| <div class="description"> |
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| <pre>public class <span class="typeNameLabel">PigToSqlAggregateRule</span> |
| extends <a href="../plan/RelOptRule.html" title="class in org.apache.calcite.plan">RelOptRule</a></pre> |
| <div class="block">Planner rule that converts Pig aggregate UDF calls to built-in SQL |
| aggregates. |
| |
| <p>This rule is applied for logical relational algebra plan that is |
| the result of Pig translation. In Pig, aggregate calls are separate |
| from grouping where we create a bag of all tuples in each group |
| first then apply the Pig aggregate UDF later. It is inefficient to |
| do that in SQL.</div> |
| </li> |
| </ul> |
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| <caption><span>Nested Classes</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colSecond" scope="col">Class</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private class </code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="PigToSqlAggregateRule.PigAggUdfFinder.html" title="class in org.apache.calcite.piglet">PigToSqlAggregateRule.PigAggUdfFinder</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">Visitor that finds all Pig aggregate UDFs or multiset |
| projection called in an expression and also whether a column is |
| referred in that expression.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private class </code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="PigToSqlAggregateRule.RexCallReplacer.html" title="class in org.apache.calcite.piglet">PigToSqlAggregateRule.RexCallReplacer</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">Helper class to replace each <a href="../rex/RexCall.html" title="class in org.apache.calcite.rex"><code>RexCall</code></a> by a corresponding |
| <a href="../rex/RexNode.html" title="class in org.apache.calcite.rex"><code>RexNode</code></a>, defined in a given map, for an expression.</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| </section> |
| <!-- =========== FIELD SUMMARY =========== --> |
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| <caption><span>Fields</span><span class="tabEnd"> </span></caption> |
| <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>static <a href="PigToSqlAggregateRule.html" title="class in org.apache.calcite.piglet">PigToSqlAggregateRule</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#INSTANCE">INSTANCE</a></span></code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private static java.lang.String</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#MULTISET_PROJECTION">MULTISET_PROJECTION</a></span></code></th> |
| <td class="colLast"> </td> |
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| <h3>Fields inherited from class org.apache.calcite.plan.<a href="../plan/RelOptRule.html" title="class in org.apache.calcite.plan">RelOptRule</a></h3> |
| <code><a href="../plan/RelOptRule.html#description">description</a>, <a href="../plan/RelOptRule.html#operands">operands</a>, <a href="../plan/RelOptRule.html#relBuilderFactory">relBuilderFactory</a></code></li> |
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| <th class="colLast" scope="col">Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private </code></td> |
| <th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(org.apache.calcite.tools.RelBuilderFactory)">PigToSqlAggregateRule</a></span>​(<a href="../tools/RelBuilderFactory.html" title="interface in org.apache.calcite.tools">RelBuilderFactory</a> relBuilderFactory)</code></th> |
| <td class="colLast"> </td> |
| </tr> |
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| <tr> |
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| <tr id="i0" class="altColor"> |
| <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="#createRecordType(org.apache.calcite.tools.RelBuilder,java.util.List)">createRecordType</a></span>​(<a href="../tools/RelBuilder.html" title="class in org.apache.calcite.tools">RelBuilder</a> relBuilder, |
| java.util.List<java.lang.Integer> fields)</code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>private java.util.List<java.lang.Integer></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getAggColumns(org.apache.calcite.rex.RexCall)">getAggColumns</a></span>​(<a href="../rex/RexCall.html" title="class in org.apache.calcite.rex">RexCall</a> pigAggCall)</code></th> |
| <td class="colLast"> |
| <div class="block">Returns a list of columns accessed in a Pig aggregate UDF call.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>private java.util.List<java.lang.Integer></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getColsFromMultisetProjection(org.apache.calcite.rex.RexCall)">getColsFromMultisetProjection</a></span>​(<a href="../rex/RexCall.html" title="class in org.apache.calcite.rex">RexCall</a> multisetProjection)</code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>private int</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getGroupRefIndex(org.apache.calcite.rex.RexNode)">getGroupRefIndex</a></span>​(<a href="../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a> rex)</code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>private static boolean</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isMultisetProjection(org.apache.calcite.rex.RexCall)">isMultisetProjection</a></span>​(<a href="../rex/RexCall.html" title="class in org.apache.calcite.rex">RexCall</a> rexCall)</code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#onMatch(org.apache.calcite.plan.RelOptRuleCall)">onMatch</a></span>​(<a href="../plan/RelOptRuleCall.html" title="class in org.apache.calcite.plan">RelOptRuleCall</a> call)</code></th> |
| <td class="colLast"> |
| <div class="block">Receives notification about a rule match.</div> |
| </td> |
| </tr> |
| </table> |
| <ul class="blockList"> |
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| <!-- --> |
| </a> |
| <h3>Methods inherited from class org.apache.calcite.plan.<a href="../plan/RelOptRule.html" title="class in org.apache.calcite.plan">RelOptRule</a></h3> |
| <code><a href="../plan/RelOptRule.html#any()">any</a>, <a href="../plan/RelOptRule.html#convert(org.apache.calcite.rel.RelNode,org.apache.calcite.plan.RelTrait)">convert</a>, <a href="../plan/RelOptRule.html#convert(org.apache.calcite.rel.RelNode,org.apache.calcite.plan.RelTraitSet)">convert</a>, <a href="../plan/RelOptRule.html#convertList(java.util.List,org.apache.calcite.plan.RelTrait)">convertList</a>, <a href="../plan/RelOptRule.html#convertOperand(java.lang.Class,com.google.common.base.Predicate,org.apache.calcite.plan.RelTrait)">convertOperand</a>, <a href="../plan/RelOptRule.html#convertOperand(java.lang.Class,java.util.function.Predicate,org.apache.calcite.plan.RelTrait)">convertOperand</a>, <a href="../plan/RelOptRule.html#equals(java.lang.Object)">equals</a>, <a href="../plan/RelOptRule.html#equals(org.apache.calcite.plan.RelOptRule)">equals</a>, <a href="../plan/RelOptRule.html#getOperand()">getOperand</a>, <a href="../plan/RelOptRule.html#getOperands()">getOperands</a>, <a href="../plan/RelOptRule.html#getOutConvention()">getOutConvention</a>, <a href="../plan/RelOptRule.html#getOutTrait()">getOutTrait</a>, <a href="../plan/RelOptRule.html#hashCode()">hashCode</a>, <a href="../plan/RelOptRule.html#matches(org.apache.calcite.plan.RelOptRuleCall)">matches</a>, <a href="../plan/RelOptRule.html#none()">none</a>, <a href="../plan/RelOptRule.html#operand(java.lang.Class,org.apache.calcite.plan.RelOptRuleOperandChildren)">operand</a>, <a href="../plan/RelOptRule.html#operand(java.lang.Class,org.apache.calcite.plan.RelOptRuleOperand,org.apache.calcite.plan.RelOptRuleOperand...)">operand</a>, <a href="../plan/RelOptRule.html#operand(java.lang.Class,org.apache.calcite.plan.RelTrait,com.google.common.base.Predicate,org.apache.calcite.plan.RelOptRuleOperandChildren)">operand</a>, <a href="../plan/RelOptRule.html#operand(java.lang.Class,org.apache.calcite.plan.RelTrait,com.google.common.base.Predicate,org.apache.calcite.plan.RelOptRuleOperand,org.apache.calcite.plan.RelOptRuleOperand...)">operand</a>, <a href="../plan/RelOptRule.html#operand(java.lang.Class,org.apache.calcite.plan.RelTrait,org.apache.calcite.plan.RelOptRuleOperandChildren)">operand</a>, <a href="../plan/RelOptRule.html#operandJ(java.lang.Class,org.apache.calcite.plan.RelTrait,java.util.function.Predicate,org.apache.calcite.plan.RelOptRuleOperandChildren)">operandJ</a>, <a href="../plan/RelOptRule.html#operandJ(java.lang.Class,org.apache.calcite.plan.RelTrait,java.util.function.Predicate,org.apache.calcite.plan.RelOptRuleOperand,org.apache.calcite.plan.RelOptRuleOperand...)">operandJ</a>, <a href="../plan/RelOptRule.html#some(org.apache.calcite.plan.RelOptRuleOperand,org.apache.calcite.plan.RelOptRuleOperand...)">some</a>, <a href="../plan/RelOptRule.html#toString()">toString</a>, <a href="../plan/RelOptRule.html#unordered(org.apache.calcite.plan.RelOptRuleOperand,org.apache.calcite.plan.RelOptRuleOperand...)">unordered</a></code></li> |
| </ul> |
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| <!-- --> |
| </a> |
| <h3>Methods inherited from class java.lang.Object</h3> |
| <code>clone, finalize, getClass, notify, notifyAll, wait, wait, wait</code></li> |
| </ul> |
| </li> |
| </ul> |
| </section> |
| </li> |
| </ul> |
| </div> |
| <div class="details"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <!-- ============ FIELD DETAIL =========== --> |
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| </a> |
| <h3>Field Detail</h3> |
| <a id="MULTISET_PROJECTION"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>MULTISET_PROJECTION</h4> |
| <pre>private static final java.lang.String MULTISET_PROJECTION</pre> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../constant-values.html#org.apache.calcite.piglet.PigToSqlAggregateRule.MULTISET_PROJECTION">Constant Field Values</a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="INSTANCE"> |
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| </a> |
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| <li class="blockList"> |
| <h4>INSTANCE</h4> |
| <pre>public static final <a href="PigToSqlAggregateRule.html" title="class in org.apache.calcite.piglet">PigToSqlAggregateRule</a> INSTANCE</pre> |
| </li> |
| </ul> |
| </li> |
| </ul> |
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| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
| <section role="region"> |
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| </a> |
| <h3>Constructor Detail</h3> |
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| </a> |
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| <h4>PigToSqlAggregateRule</h4> |
| <pre>private PigToSqlAggregateRule​(<a href="../tools/RelBuilderFactory.html" title="interface in org.apache.calcite.tools">RelBuilderFactory</a> relBuilderFactory)</pre> |
| </li> |
| </ul> |
| </li> |
| </ul> |
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| <a id="onMatch(org.apache.calcite.plan.RelOptRuleCall)"> |
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| <h4>onMatch</h4> |
| <pre class="methodSignature">public void onMatch​(<a href="../plan/RelOptRuleCall.html" title="class in org.apache.calcite.plan">RelOptRuleCall</a> call)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from class: <code><a href="../plan/RelOptRule.html#onMatch(org.apache.calcite.plan.RelOptRuleCall)">RelOptRule</a></code></span></div> |
| <div class="block">Receives notification about a rule match. At the time that this method is |
| called, <a href="../plan/RelOptRuleCall.html#rels"><code>call.rels</code></a> holds the set of relational |
| expressions which match the operands to the rule; <code> |
| call.rels[0]</code> is the root expression. |
| |
| <p>Typically a rule would check that the nodes are valid matches, creates |
| a new expression, then calls back <a href="../plan/RelOptRuleCall.html#transformTo(org.apache.calcite.rel.RelNode,java.util.Map)"><code>RelOptRuleCall.transformTo(org.apache.calcite.rel.RelNode, java.util.Map<org.apache.calcite.rel.RelNode, org.apache.calcite.rel.RelNode>)</code></a> to |
| register the expression.</p></div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../plan/RelOptRule.html#onMatch(org.apache.calcite.plan.RelOptRuleCall)">onMatch</a></code> in class <code><a href="../plan/RelOptRule.html" title="class in org.apache.calcite.plan">RelOptRule</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>call</code> - Rule call</dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../plan/RelOptRule.html#matches(org.apache.calcite.plan.RelOptRuleCall)"><code>RelOptRule.matches(RelOptRuleCall)</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="createRecordType(org.apache.calcite.tools.RelBuilder,java.util.List)"> |
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| </a> |
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| <h4>createRecordType</h4> |
| <pre class="methodSignature">private static <a href="../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> createRecordType​(<a href="../tools/RelBuilder.html" title="class in org.apache.calcite.tools">RelBuilder</a> relBuilder, |
| java.util.List<java.lang.Integer> fields)</pre> |
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| <h4>getGroupRefIndex</h4> |
| <pre class="methodSignature">private int getGroupRefIndex​(<a href="../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a> rex)</pre> |
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| <h4>getAggColumns</h4> |
| <pre class="methodSignature">private java.util.List<java.lang.Integer> getAggColumns​(<a href="../rex/RexCall.html" title="class in org.apache.calcite.rex">RexCall</a> pigAggCall)</pre> |
| <div class="block">Returns a list of columns accessed in a Pig aggregate UDF call.</div> |
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| <pre class="methodSignature">private java.util.List<java.lang.Integer> getColsFromMultisetProjection​(<a href="../rex/RexCall.html" title="class in org.apache.calcite.rex">RexCall</a> multisetProjection)</pre> |
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| <pre class="methodSignature">private static boolean isMultisetProjection​(<a href="../rex/RexCall.html" title="class in org.apache.calcite.rex">RexCall</a> rexCall)</pre> |
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