Package org.apache.calcite.adapter.cassandra

Class CassandraTableScan

java.lang.Object

org.apache.calcite.rel.AbstractRelNode

org.apache.calcite.rel.core.TableScan

org.apache.calcite.adapter.cassandra.CassandraTableScan

All Implemented Interfaces:

Cloneable, CassandraRel, RelOptNode, Hintable, RelNode

public class CassandraTableScan
extends TableScan
implements CassandraRel

Relational expression representing a scan of a Cassandra collection.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.calcite.adapter.cassandra.CassandraRel

CassandraRel.Implementor

Nested classes/interfaces inherited from interface org.apache.calcite.rel.RelNode

RelNode.Context

Field Summary

Fields inherited from class org.apache.calcite.rel.core.TableScan

hints, table

Fields inherited from class org.apache.calcite.rel.AbstractRelNode

digest, id, rowType, traitSet

Fields inherited from interface org.apache.calcite.adapter.cassandra.CassandraRel

CONVENTION

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	CassandraTableScan(RelOptCluster cluster, RelTraitSet traitSet, RelOptTable table, CassandraTable cassandraTable, @Nullable RelDataType projectRowType)	Creates a CassandraTableScan.

Method Summary

Modifier and Type	Method	Description
RelNode	copy(RelTraitSet traitSet, 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, getHints, getTable, identity, identity, project

Methods inherited from class org.apache.calcite.rel.AbstractRelNode

accept, childrenAccept, collectVariablesSet, collectVariablesUsed, deepEquals, deepHashCode, equals, explain, getCluster, getConvention, getCorrelVariable, getDescription, getDigest, getExpectedInputRowType, getId, getInput, getInputs, getRelDigest, getRelTypeName, getRowType, getTraitSet, getVariablesSet, hashCode, isEnforcer, isValid, metadata, onRegister, recomputeDigest, replaceInput, 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.hint.Hintable

attachHints, withHints

Methods inherited from interface org.apache.calcite.rel.RelNode

accept, accept, childrenAccept, collectVariablesSet, collectVariablesUsed, computeSelfCost, deepEquals, deepHashCode, estimateRowCount, explain, explain, fieldIsNullable, getConvention, getCorrelVariable, getDigest, getExpectedInputRowType, getInput, getInputs, getRelDigest, getRelTypeName, getRowType, getTable, getVariablesSet, isEnforcer, isValid, metadata, onRegister, recomputeDigest, replaceInput, stripped

Methods inherited from interface org.apache.calcite.plan.RelOptNode

getCluster, getDescription, getId, getTraitSet

Constructor Details

CassandraTableScan

protected CassandraTableScan(RelOptCluster cluster,
 RelTraitSet traitSet,
 RelOptTable table,
 CassandraTable cassandraTable,
 @Nullable RelDataType projectRowType)

Creates a CassandraTableScan.

Parameters:

cluster - Cluster

traitSet - Traits

table - Table

cassandraTable - Cassandra table

projectRowType - Fields and types to project; null to project raw row

Method Details

copy

public RelNode copy(RelTraitSet traitSet,
 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 interface RelNode

Overrides:

copy in class AbstractRelNode

Parameters:

traitSet - Trait set

inputs - Inputs

Returns:

Copy of this relational expression, substituting traits and inputs

deriveRowType

public RelDataType deriveRowType()

Overrides:

deriveRowType in class TableScan

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 call super.register.

Specified by:

register in interface RelNode

Overrides:

register in class AbstractRelNode

Parameters:

planner - Planner to be used to register additional relational expressions

implement

public void implement(CassandraRel.Implementor implementor)

Specified by:

implement in interface CassandraRel