Package org.apache.calcite.rel.rules

Class ProjectTableScanRule

java.lang.Object

org.apache.calcite.plan.RelOptRule

org.apache.calcite.plan.RelRule<ProjectTableScanRule.Config>

org.apache.calcite.rel.rules.ProjectTableScanRule

@Enclosing
public class ProjectTableScanRule
extends RelRule<ProjectTableScanRule.Config>

Planner rule that converts a Project on a TableScan of a ProjectableFilterableTable to a Bindables.BindableTableScan.

The CoreRules.PROJECT_INTERPRETER_TABLE_SCAN variant allows an intervening EnumerableInterpreter.

See Also:

• FilterTableScanRule

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	ProjectTableScanRule.Config	Rule configuration.

Nested classes/interfaces inherited from class org.apache.calcite.plan.RelRule

RelRule.Done, RelRule.MatchHandler<R extends RelOptRule>, RelRule.OperandBuilder, RelRule.OperandDetailBuilder<R extends RelNode>, RelRule.OperandTransform

Nested classes/interfaces inherited from class org.apache.calcite.plan.RelOptRule

RelOptRule.ConverterRelOptRuleOperand

Field Summary

Fields

Modifier and Type	Field	Description
static final com.google.common.base.Predicate<TableScan>	PREDICATE	Deprecated.

Fields inherited from class org.apache.calcite.plan.RelRule

config

Fields inherited from class org.apache.calcite.plan.RelOptRule

description, operands, relBuilderFactory

Constructor Summary

Constructors

Modifier	Constructor	Description
	ProjectTableScanRule(RelOptRuleOperand operand, RelBuilderFactory relBuilderFactory, String description)	Deprecated.
protected	ProjectTableScanRule(ProjectTableScanRule.Config config)	Creates a ProjectTableScanRule.

Method Summary

Modifier and Type	Method	Description
protected void	apply(RelOptRuleCall call, Project project, TableScan scan)
void	onMatch(RelOptRuleCall call)	Receives notification about a rule match.
protected static boolean	test(TableScan scan)

Methods inherited from class org.apache.calcite.plan.RelOptRule

any, convert, convert, convert, convert, convertList, convertOperand, convertOperand, equals, equals, getOperand, getOperands, getOutConvention, getOutTrait, hashCode, matches, none, operand, operand, operand, operand, operand, operandJ, operandJ, some, toString, unordered

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Details

PREDICATE

@Deprecated
public static final com.google.common.base.Predicate<TableScan> PREDICATE

Deprecated.

Constructor Details

ProjectTableScanRule

protected ProjectTableScanRule(ProjectTableScanRule.Config config)

Creates a ProjectTableScanRule.

ProjectTableScanRule

@Deprecated
public ProjectTableScanRule(RelOptRuleOperand operand,
 RelBuilderFactory relBuilderFactory,
 String description)

Deprecated.

Method Details

test

protected static boolean test(TableScan scan)

onMatch

public void onMatch(RelOptRuleCall call)

Description copied from class: RelOptRule

Receives notification about a rule match. At the time that this method is called, call.rels holds the set of relational expressions which match the operands to the rule; call.rels[0] is the root expression.

Typically a rule would check that the nodes are valid matches, creates a new expression, then calls back RelOptRuleCall.transformTo(org.apache.calcite.rel.RelNode, java.util.Map<org.apache.calcite.rel.RelNode, org.apache.calcite.rel.RelNode>, org.apache.calcite.plan.RelHintsPropagator) to register the expression.

Specified by:

onMatch in class RelOptRule

Parameters:

call - Rule call

See Also:

• RelOptRule.matches(RelOptRuleCall)

apply

protected void apply(RelOptRuleCall call,
 Project project,
 TableScan scan)