Package org.apache.calcite.adapter.pig
Class PigProject
java.lang.Object
org.apache.calcite.rel.AbstractRelNode
org.apache.calcite.rel.SingleRel
org.apache.calcite.rel.core.Project
org.apache.calcite.adapter.pig.PigProject
- All Implemented Interfaces:
Cloneable
,PigRel
,RelOptNode
,Hintable
,RelNode
public class PigProject extends Project implements PigRel
Implementation of
Project
in
Pig calling convention
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Nested Class Summary
Nested classes/interfaces inherited from interface org.apache.calcite.adapter.pig.PigRel
PigRel.Implementor
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Field Summary
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Constructor Summary
Constructors Constructor Description PigProject(RelOptCluster cluster, RelTraitSet traitSet, RelNode input, List<? extends RexNode> projects, RelDataType rowType)
Creates a PigProject. -
Method Summary
Modifier and Type Method Description Project
copy(RelTraitSet traitSet, RelNode input, List<RexNode> projects, RelDataType rowType)
Copies a project.RelOptTable
getTable()
Override this method so it looks down the tree to find the table this node is acting on.void
implement(PigRel.Implementor implementor)
Converts this node to a Pig Latin statement.Methods inherited from class org.apache.calcite.rel.core.Project
accept, computeSelfCost, containsOver, copy, copy, deepEquals0, deepHashCode0, explainTerms, getFlags, getHints, getMapping, getMapping, getNamedProjects, getPartialMapping, getPermutation, getPermutation, getProjects, isBoxed, isMapping, isValid
Methods inherited from class org.apache.calcite.rel.SingleRel
childrenAccept, deriveRowType, estimateRowCount, getInput, getInputs, replaceInput
Methods inherited from class org.apache.calcite.rel.AbstractRelNode
accept, collectVariablesSet, collectVariablesUsed, deepEquals, deepHashCode, equals, explain, getCluster, getConvention, getCorrelVariable, getDescription, getDigest, getExpectedInputRowType, getId, getInput, getRelDigest, getRelTypeName, getRowType, getTraitSet, getVariablesSet, hashCode, isEnforcer, metadata, onRegister, recomputeDigest, register, sole, toString
Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
Methods inherited from interface org.apache.calcite.rel.RelNode
accept, accept, childrenAccept, collectVariablesSet, collectVariablesUsed, computeSelfCost, copy, deepEquals, deepHashCode, estimateRowCount, explain, explain, getConvention, getCorrelVariable, getDigest, getExpectedInputRowType, getInput, getInputs, getRelDigest, getRelTypeName, getRowType, getVariablesSet, isEnforcer, isValid, metadata, onRegister, recomputeDigest, register, replaceInput
Methods inherited from interface org.apache.calcite.plan.RelOptNode
getCluster, getDescription, getId, getTraitSet
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Constructor Details
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PigProject
public PigProject(RelOptCluster cluster, RelTraitSet traitSet, RelNode input, List<? extends RexNode> projects, RelDataType rowType)Creates a PigProject.
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Method Details
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copy
public Project copy(RelTraitSet traitSet, RelNode input, List<RexNode> projects, RelDataType rowType)Description copied from class:Project
Copies a project.- Specified by:
copy
in classProject
- Parameters:
traitSet
- Traitsinput
- Inputprojects
- Project expressionsrowType
- Output row type- Returns:
- New
Project
if any parameter differs from the value of thisProject
, or justthis
if all the parameters are the same - See Also:
Project.copy(RelTraitSet, List)
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implement
Description copied from interface:PigRel
Converts this node to a Pig Latin statement. -
getTable
Override this method so it looks down the tree to find the table this node is acting on.- Specified by:
getTable
in interfaceRelNode
- Overrides:
getTable
in classAbstractRelNode
- Returns:
- If this relational expression represents an access to a table, returns that table, otherwise returns null
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