Package org.apache.calcite.rel.rules

Class MaterializedViewFilterScanRule

java.lang.Object

org.apache.calcite.plan.RelOptRule

org.apache.calcite.rel.rules.MaterializedViewFilterScanRule

public class MaterializedViewFilterScanRule
extends RelOptRule

Planner rule that converts a Filter on a TableScan to a Filter on Materialized View

Field Summary

Fields

Modifier and Type	Field	Description
static MaterializedViewFilterScanRule	INSTANCE
private HepProgram	program

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

description, operands, relBuilderFactory

Constructor Summary

Constructors

Constructor	Description
MaterializedViewFilterScanRule(RelBuilderFactory relBuilderFactory)	Creates a MaterializedViewFilterScanRule.

Method Summary

Modifier and Type	Method	Description
protected void	apply(RelOptRuleCall call, Filter filter, TableScan scan)
void	onMatch(RelOptRuleCall call)	Receives notification about a rule match.

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

any, 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 Detail

INSTANCE

public static final MaterializedViewFilterScanRule INSTANCE

program

private final HepProgram program

Constructor Detail

MaterializedViewFilterScanRule

public MaterializedViewFilterScanRule(RelBuilderFactory relBuilderFactory)

Creates a MaterializedViewFilterScanRule.

Method Detail

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>) 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,
                     Filter filter,
                     TableScan scan)