Package org.apache.calcite.adapter.spark
Class SparkToEnumerableConverter
- java.lang.Object
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- org.apache.calcite.rel.AbstractRelNode
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- org.apache.calcite.rel.SingleRel
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- org.apache.calcite.rel.convert.ConverterImpl
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- org.apache.calcite.adapter.spark.SparkToEnumerableConverter
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- All Implemented Interfaces:
java.lang.Cloneable
,EnumerableRel
,RelOptNode
,Converter
,RelNode
public class SparkToEnumerableConverter extends ConverterImpl implements EnumerableRel
Relational expression that converts input ofSpark convention
intoEnumerableConvention
.Concretely, this means calling the
AbstractJavaRDDLike.collect()
method of an RDD and converting it to enumerable.
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Nested Class Summary
Nested Classes Modifier and Type Class Description private static class
SparkToEnumerableConverter.SparkImplementorImpl
Implementation ofSparkRel.Implementor
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Nested classes/interfaces inherited from interface org.apache.calcite.adapter.enumerable.EnumerableRel
EnumerableRel.Prefer, EnumerableRel.Result
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Nested classes/interfaces inherited from interface org.apache.calcite.rel.RelNode
RelNode.Context
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Field Summary
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Fields inherited from class org.apache.calcite.rel.convert.ConverterImpl
inTraits, traitDef
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Fields inherited from class org.apache.calcite.rel.AbstractRelNode
digest, id, rowType, traitSet
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Fields inherited from interface org.apache.calcite.adapter.enumerable.EnumerableRel
FILTER_FACTORY, PROJECT_FACTORY
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Constructor Summary
Constructors Modifier Constructor Description protected
SparkToEnumerableConverter(RelOptCluster cluster, RelTraitSet traits, RelNode input)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description RelOptCost
computeSelfCost(RelOptPlanner planner, RelMetadataQuery mq)
Returns the cost of this plan (not including children).RelNode
copy(RelTraitSet traitSet, java.util.List<RelNode> inputs)
Creates a copy of this relational expression, perhaps changing traits and inputs.EnumerableRel.Result
implement(EnumerableRelImplementor implementor, EnumerableRel.Prefer pref)
Creates a plan for this expression according to a calling convention.-
Methods inherited from class org.apache.calcite.rel.convert.ConverterImpl
cannotImplement, getInputTraits, getTraitDef
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Methods inherited from class org.apache.calcite.rel.SingleRel
childrenAccept, deriveRowType, estimateRowCount, explainTerms, getInput, getInputs, replaceInput
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Methods inherited from class org.apache.calcite.rel.AbstractRelNode
accept, accept, collectVariablesSet, collectVariablesUsed, computeDigest, computeSelfCost, explain, getChildExps, getCluster, getCollationList, getConvention, getCorrelVariable, getDescription, getDigest, getExpectedInputRowType, getId, getInput, getQuery, getRelTypeName, getRows, getRowType, getTable, getTraitSet, getVariablesSet, getVariablesStopped, isDistinct, isKey, isValid, isValid, metadata, onRegister, recomputeDigest, register, sole, toString
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Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
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Methods inherited from interface org.apache.calcite.rel.RelNode
accept, accept, childrenAccept, collectVariablesSet, collectVariablesUsed, computeSelfCost, estimateRowCount, explain, getChildExps, getCollationList, getConvention, getCorrelVariable, getExpectedInputRowType, getInput, getInputs, getQuery, getRelTypeName, getRows, getRowType, getTable, getVariablesSet, getVariablesStopped, isDistinct, isKey, isValid, isValid, metadata, onRegister, recomputeDigest, register, replaceInput
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Methods inherited from interface org.apache.calcite.plan.RelOptNode
getCluster, getDescription, getDigest, getId, getTraitSet
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Constructor Detail
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SparkToEnumerableConverter
protected SparkToEnumerableConverter(RelOptCluster cluster, RelTraitSet traits, RelNode input)
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Method Detail
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copy
public RelNode copy(RelTraitSet traitSet, java.util.List<RelNode> inputs)
Description copied from interface:RelNode
Creates a copy of this relational expression, perhaps changing traits and inputs.Sub-classes with other important attributes are encouraged to create variants of this method with more parameters.
- Specified by:
copy
in interfaceRelNode
- Overrides:
copy
in classAbstractRelNode
- Parameters:
traitSet
- Trait setinputs
- Inputs- Returns:
- Copy of this relational expression, substituting traits and inputs
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computeSelfCost
public RelOptCost computeSelfCost(RelOptPlanner planner, RelMetadataQuery mq)
Description copied from interface:RelNode
Returns the cost of this plan (not including children). The base implementation throws an error; derived classes should override.NOTE jvs 29-Mar-2006: Don't call this method directly. Instead, use
RelMetadataQuery.getNonCumulativeCost(org.apache.calcite.rel.RelNode)
, which gives plugins a chance to override the rel's default ideas about cost.- Specified by:
computeSelfCost
in interfaceRelNode
- Overrides:
computeSelfCost
in classConverterImpl
- Parameters:
planner
- Planner for cost calculationmq
- Metadata query- Returns:
- Cost of this plan (not including children)
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implement
public EnumerableRel.Result implement(EnumerableRelImplementor implementor, EnumerableRel.Prefer pref)
Description copied from interface:EnumerableRel
Creates a plan for this expression according to a calling convention.- Specified by:
implement
in interfaceEnumerableRel
- Parameters:
implementor
- Implementorpref
- Preferred representation for rows in result expression- Returns:
- Plan for this expression according to a calling convention
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