Class CassandraProject
- 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.core.Project
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- org.apache.calcite.adapter.cassandra.CassandraProject
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- All Implemented Interfaces:
java.lang.Cloneable
,CassandraRel
,RelOptNode
,RelNode
public class CassandraProject extends Project implements CassandraRel
Implementation ofProject
relational expression in Cassandra.
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Nested Class Summary
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Nested classes/interfaces inherited from class org.apache.calcite.rel.core.Project
Project.Flags
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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
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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 Constructor Description CassandraProject(RelOptCluster cluster, RelTraitSet traitSet, RelNode input, java.util.List<? extends RexNode> projects, RelDataType rowType)
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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).Project
copy(RelTraitSet traitSet, RelNode input, java.util.List<RexNode> projects, RelDataType rowType)
Copies a project.void
implement(CassandraRel.Implementor implementor)
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Methods inherited from class org.apache.calcite.rel.core.Project
accept, copy, copy, explainTerms, getChildExps, getFlags, getMapping, getMapping, getNamedProjects, getPartialMapping, getPermutation, getPermutation, getProjects, isBoxed, isMapping, isValid
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Methods inherited from class org.apache.calcite.rel.SingleRel
childrenAccept, deriveRowType, estimateRowCount, getInput, getInputs, replaceInput
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Methods inherited from class org.apache.calcite.rel.AbstractRelNode
accept, collectVariablesSet, collectVariablesUsed, computeDigest, computeSelfCost, explain, getCluster, getCollationList, getConvention, getCorrelVariable, getDescription, getDigest, getExpectedInputRowType, getId, getInput, getQuery, getRelTypeName, getRows, getRowType, getTable, getTraitSet, getVariablesSet, getVariablesStopped, isDistinct, isKey, 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, copy, 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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CassandraProject
public CassandraProject(RelOptCluster cluster, RelTraitSet traitSet, RelNode input, java.util.List<? extends RexNode> projects, RelDataType rowType)
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Method Detail
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copy
public Project copy(RelTraitSet traitSet, RelNode input, java.util.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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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 classProject
- Parameters:
planner
- Planner for cost calculationmq
- Metadata query- Returns:
- Cost of this plan (not including children)
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implement
public void implement(CassandraRel.Implementor implementor)
- Specified by:
implement
in interfaceCassandraRel
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