Class CassandraTableScan
- java.lang.Object
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- org.apache.calcite.rel.AbstractRelNode
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- org.apache.calcite.rel.core.TableScan
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- org.apache.calcite.adapter.cassandra.CassandraTableScan
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- All Implemented Interfaces:
java.lang.Cloneable
,CassandraRel
,RelOptNode
,RelNode
public class CassandraTableScan extends TableScan implements CassandraRel
Relational expression representing a scan of a Cassandra collection.
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Nested Class Summary
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Nested classes/interfaces inherited from interface org.apache.calcite.adapter.cassandra.CassandraRel
CassandraRel.Implementor
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Nested classes/interfaces inherited from interface org.apache.calcite.rel.RelNode
RelNode.Context
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Field Summary
Fields Modifier and Type Field Description (package private) CassandraTable
cassandraTable
(package private) RelDataType
projectRowType
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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.cassandra.CassandraRel
CONVENTION
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Constructor Summary
Constructors Modifier Constructor Description protected
CassandraTableScan(RelOptCluster cluster, RelTraitSet traitSet, RelOptTable table, CassandraTable cassandraTable, RelDataType projectRowType)
Creates a CassandraTableScan.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description RelNode
copy(RelTraitSet traitSet, java.util.List<RelNode> inputs)
Creates a copy of this relational expression, perhaps changing traits and inputs.RelDataType
deriveRowType()
void
implement(CassandraRel.Implementor implementor)
void
register(RelOptPlanner planner)
Registers any special rules specific to this kind of relational expression.-
Methods inherited from class org.apache.calcite.rel.core.TableScan
accept, computeSelfCost, estimateRowCount, explainTerms, getCollationList, getTable, identity, identity, project
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Methods inherited from class org.apache.calcite.rel.AbstractRelNode
accept, childrenAccept, collectVariablesSet, collectVariablesUsed, computeDigest, computeSelfCost, explain, getChildExps, getCluster, getConvention, getCorrelVariable, getDescription, getDigest, getExpectedInputRowType, getId, getInput, getInputs, getQuery, getRelTypeName, getRows, getRowType, getTraitSet, getVariablesSet, getVariablesStopped, isDistinct, isKey, isValid, isValid, metadata, onRegister, recomputeDigest, replaceInput, 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, computeSelfCost, estimateRowCount, explain, getChildExps, getCollationList, getConvention, getCorrelVariable, getExpectedInputRowType, getInput, getInputs, getQuery, getRelTypeName, getRows, getRowType, getTable, getVariablesSet, getVariablesStopped, isDistinct, isKey, isValid, isValid, metadata, onRegister, recomputeDigest, replaceInput
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Methods inherited from interface org.apache.calcite.plan.RelOptNode
getCluster, getDescription, getDigest, getId, getTraitSet
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Field Detail
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cassandraTable
final CassandraTable cassandraTable
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projectRowType
final RelDataType projectRowType
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Constructor Detail
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CassandraTableScan
protected CassandraTableScan(RelOptCluster cluster, RelTraitSet traitSet, RelOptTable table, CassandraTable cassandraTable, RelDataType projectRowType)
Creates a CassandraTableScan.- Parameters:
cluster
- ClustertraitSet
- Traitstable
- TablecassandraTable
- Cassandra tableprojectRowType
- Fields and types to project; null to project raw row
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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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deriveRowType
public RelDataType deriveRowType()
- Overrides:
deriveRowType
in classTableScan
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register
public void register(RelOptPlanner planner)
Description copied from interface:RelNode
Registers any special rules specific to this kind of relational expression.The planner calls this method this first time that it sees a relational expression of this class. The derived class should call
RelOptPlanner.addRule(org.apache.calcite.plan.RelOptRule)
for each rule, and then callsuper.register
.- Specified by:
register
in interfaceRelNode
- Overrides:
register
in classAbstractRelNode
- Parameters:
planner
- Planner to be used to register additional relational expressions
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implement
public void implement(CassandraRel.Implementor implementor)
- Specified by:
implement
in interfaceCassandraRel
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