Package org.apache.calcite.rel.rules

Class JoinUnionTransposeRule

java.lang.Object

org.apache.calcite.plan.RelOptRule

org.apache.calcite.rel.rules.JoinUnionTransposeRule

public class JoinUnionTransposeRule
extends RelOptRule

Planner rule that pushes a Join past a non-distinct Union.

Field Summary

Fields

Modifier and Type	Field	Description
static JoinUnionTransposeRule	LEFT_UNION
static JoinUnionTransposeRule	RIGHT_UNION

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

description, operands, relBuilderFactory

Constructor Summary

Constructors

Constructor	Description
JoinUnionTransposeRule(RelOptRuleOperand operand, RelBuilderFactory relBuilderFactory, java.lang.String description)	Creates a JoinUnionTransposeRule.

Method Summary

Modifier and Type	Method	Description
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

LEFT_UNION

public static final JoinUnionTransposeRule LEFT_UNION

RIGHT_UNION

public static final JoinUnionTransposeRule RIGHT_UNION

Constructor Detail

JoinUnionTransposeRule

public JoinUnionTransposeRule(RelOptRuleOperand operand,
                              RelBuilderFactory relBuilderFactory,
                              java.lang.String description)

Creates a JoinUnionTransposeRule.

Parameters:

operand - root operand, must not be null

description - Description, or null to guess description

relBuilderFactory - Builder for relational expressions

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)