Package org.apache.calcite.adapter.enumerable

Class EnumerableTableScan

java.lang.Object

org.apache.calcite.rel.AbstractRelNode

org.apache.calcite.rel.core.TableScan

org.apache.calcite.adapter.enumerable.EnumerableTableScan

All Implemented Interfaces:

java.lang.Cloneable, EnumerableRel, RelOptNode, RelNode

public class EnumerableTableScan
extends TableScan
implements EnumerableRel

Implementation of TableScan in enumerable calling convention.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.calcite.adapter.enumerable.EnumerableRel

EnumerableRel.Prefer, EnumerableRel.Result

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

RelNode.Context

Field Summary

Fields

Modifier and Type	Field	Description
private java.lang.Class	elementType

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

table

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

digest, id, rowType, traitSet

Fields inherited from interface org.apache.calcite.adapter.enumerable.EnumerableRel

FILTER_FACTORY, PROJECT_FACTORY

Constructor Summary

Constructors

Constructor	Description
EnumerableTableScan(RelOptCluster cluster, RelTraitSet traitSet, RelOptTable table, java.lang.Class elementType)	Creates an EnumerableTableScan.

Method Summary

Modifier and Type	Method	Description
static boolean	canHandle(Table table)	Returns whether EnumerableTableScan can generate code to handle a particular variant of the Table SPI.
RelNode	copy(RelTraitSet traitSet, java.util.List<RelNode> inputs)	Creates a copy of this relational expression, perhaps changing traits and inputs.
static EnumerableTableScan	create(RelOptCluster cluster, RelOptTable relOptTable)	Creates an EnumerableTableScan.
static java.lang.Class	deduceElementType(Table table)
static JavaRowFormat	deduceFormat(RelOptTable table)
boolean	equals(java.lang.Object obj)
private Expression	fieldExpression(ParameterExpression row_, int i, PhysType physType, JavaRowFormat format)
private JavaRowFormat	format()
private Expression	getExpression(PhysType physType)
private boolean	hasCollectionField(RelDataType rowType)
int	hashCode()
EnumerableRel.Result	implement(EnumerableRelImplementor implementor, EnumerableRel.Prefer pref)	Creates a plan for this expression according to a calling convention.
private Expression	toEnumerable(Expression expression)
private Expression	toRows(PhysType physType, Expression expression)

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

accept, computeSelfCost, deriveRowType, estimateRowCount, explainTerms, getCollationList, getTable, identity, identity, project

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, register, 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.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, register, replaceInput

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

getCluster, getDescription, getDigest, getId, getTraitSet

Field Detail

elementType

private final java.lang.Class elementType

Constructor Detail

EnumerableTableScan

public EnumerableTableScan(RelOptCluster cluster,
                           RelTraitSet traitSet,
                           RelOptTable table,
                           java.lang.Class elementType)

Creates an EnumerableTableScan.

Use create(org.apache.calcite.plan.RelOptCluster, org.apache.calcite.plan.RelOptTable) unless you know what you are doing.

Method Detail

create

public static EnumerableTableScan create(RelOptCluster cluster,
                                         RelOptTable relOptTable)

Creates an EnumerableTableScan.

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

canHandle

public static boolean canHandle(Table table)

Returns whether EnumerableTableScan can generate code to handle a particular variant of the Table SPI.

deduceElementType

public static java.lang.Class deduceElementType(Table table)

deduceFormat

public static JavaRowFormat deduceFormat(RelOptTable table)

getExpression

private Expression getExpression(PhysType physType)

toEnumerable

private Expression toEnumerable(Expression expression)

toRows

private Expression toRows(PhysType physType,
                          Expression expression)

fieldExpression

private Expression fieldExpression(ParameterExpression row_,
                                   int i,
                                   PhysType physType,
                                   JavaRowFormat format)

format

private JavaRowFormat format()

hasCollectionField

private boolean hasCollectionField(RelDataType rowType)

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 interface RelNode

Overrides:

copy in class AbstractRelNode

Parameters:

traitSet - Trait set

inputs - Inputs

Returns:

Copy of this relational expression, substituting traits and inputs

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 interface EnumerableRel

Parameters:

implementor - Implementor

pref - Preferred representation for rows in result expression

Returns:

Plan for this expression according to a calling convention