Package org.apache.calcite.interpreter

Class Bindables.BindableTableScan

java.lang.Object

org.apache.calcite.rel.AbstractRelNode

org.apache.calcite.rel.core.TableScan

org.apache.calcite.interpreter.Bindables.BindableTableScan

All Implemented Interfaces:

Cloneable, BindableRel, InterpretableRel, RelOptNode, Hintable, RelNode, ArrayBindable, Bindable<@Nullable Object[]>, Typed

Enclosing class:

Bindables

public static class Bindables.BindableTableScan
extends TableScan
implements BindableRel

Scan of a table that implements ScannableTable and therefore can be converted into an Enumerable.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.calcite.interpreter.InterpretableRel

InterpretableRel.InterpreterImplementor

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

RelNode.Context

Field Summary

Fields

Modifier and Type	Field	Description
final com.google.common.collect.ImmutableList<RexNode>	filters
final ImmutableIntList	projects

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

Method Summary

Modifier and Type	Method	Description
Enumerable<@Nullable Object[]>	bind(DataContext dataContext)	Executes this statement and returns an enumerable which will yield rows.
static boolean	canHandle(RelOptTable table)
@Nullable RelOptCost	computeSelfCost(RelOptPlanner planner, RelMetadataQuery mq)	Returns the cost of this plan (not including children).
static Bindables.BindableTableScan	create(RelOptCluster cluster, RelOptTable relOptTable)	Creates a BindableTableScan.
static Bindables.BindableTableScan	create(RelOptCluster cluster, RelOptTable relOptTable, List<RexNode> filters, List<Integer> projects)	Creates a BindableTableScan.
RelDataType	deriveRowType()
double	estimateRowCount(RelMetadataQuery mq)	Returns an estimate of the number of rows this relational expression will return.
RelWriter	explainTerms(RelWriter pw)	Describes the inputs and attributes of this relational expression.
Class<Object[]>	getElementType()	Gets the type of the element(s) that are returned in this collection.
Node	implement(InterpretableRel.InterpreterImplementor implementor)	Creates an interpreter node to implement this relational expression.

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

accept, getHints, getTable, identity, identity, project

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

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

attachHints, withHints

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

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

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

getCluster, getDescription, getId, getTraitSet

Field Details

filters

public final com.google.common.collect.ImmutableList<RexNode> filters

projects

public final ImmutableIntList projects

Method Details

create

public static Bindables.BindableTableScan create(RelOptCluster cluster,
 RelOptTable relOptTable)

Creates a BindableTableScan.

create

public static Bindables.BindableTableScan create(RelOptCluster cluster,
 RelOptTable relOptTable,
 List<RexNode> filters,
 List<Integer> projects)

Creates a BindableTableScan.

deriveRowType

public RelDataType deriveRowType()

Overrides:

deriveRowType in class TableScan

getElementType

public Class<Object[]> getElementType()

Description copied from interface: Typed

Gets the type of the element(s) that are returned in this collection.

Specified by:

getElementType in interface ArrayBindable

Specified by:

getElementType in interface Typed

explainTerms

public RelWriter explainTerms(RelWriter pw)

Description copied from class: AbstractRelNode

Describes the inputs and attributes of this relational expression. Each node should call super.explainTerms, then call the RelWriter.input(String, RelNode) and RelWriter.item(String, Object) methods for each input and attribute.

Overrides:

explainTerms in class TableScan

Parameters:

pw - Plan writer

Returns:

Plan writer for fluent-explain pattern

estimateRowCount

public double estimateRowCount(RelMetadataQuery mq)

Description copied from interface: RelNode

Returns an estimate of the number of rows this relational expression will return.

NOTE jvs 29-Mar-2006: Don't call this method directly. Instead, use RelMetadataQuery.getRowCount(org.apache.calcite.rel.RelNode), which gives plugins a chance to override the rel's default ideas about row count.

Specified by:

estimateRowCount in interface RelNode

Overrides:

estimateRowCount in class TableScan

Parameters:

mq - Metadata query

Returns:

Estimate of the number of rows this relational expression will return

computeSelfCost

public @Nullable 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 interface RelNode

Overrides:

computeSelfCost in class TableScan

Parameters:

planner - Planner for cost calculation

mq - Metadata query

Returns:

Cost of this plan (not including children)

canHandle

public static boolean canHandle(RelOptTable table)

bind

public Enumerable<@Nullable Object[]> bind(DataContext dataContext)

Description copied from interface: Bindable

Executes this statement and returns an enumerable which will yield rows. The environment parameter provides the values in the root of the environment (usually schemas).

Specified by:

bind in interface Bindable<@Nullable Object[]>

Parameters:

dataContext - Environment that provides tables

Returns:

Enumerable over rows

implement

public Node implement(InterpretableRel.InterpreterImplementor implementor)

Description copied from interface: InterpretableRel

Creates an interpreter node to implement this relational expression.

Specified by:

implement in interface InterpretableRel