Package org.apache.calcite.rel.rules

Class FilterMergeRule

java.lang.Object

org.apache.calcite.plan.RelOptRule

org.apache.calcite.rel.rules.FilterMergeRule

public class FilterMergeRule
extends RelOptRule

Planner rule that combines two LogicalFilters.

Field Summary

Fields

Modifier and Type	Field	Description
static FilterMergeRule	INSTANCE

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

description, operands, relBuilderFactory

Constructor Summary

Constructors

Constructor	Description
FilterMergeRule(RelFactories.FilterFactory filterFactory)	Deprecated.
FilterMergeRule(RelBuilderFactory relBuilderFactory)	Creates a FilterMergeRule.

Method Summary

Modifier and Type	Method	Description
private RexProgram	createProgram(Filter filterRel)	Creates a RexProgram corresponding to a LogicalFilter
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 FilterMergeRule INSTANCE

Constructor Detail

FilterMergeRule

public FilterMergeRule(RelBuilderFactory relBuilderFactory)

Creates a FilterMergeRule.

FilterMergeRule

@Deprecated
public FilterMergeRule(RelFactories.FilterFactory filterFactory)

Deprecated.

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)

createProgram

private RexProgram createProgram(Filter filterRel)

Creates a RexProgram corresponding to a LogicalFilter

Parameters:

filterRel - the LogicalFilter

Returns:

created RexProgram