org.apache.calcite.rel.rules

Class ProjectWindowTransposeRule

java.lang.Object

org.apache.calcite.plan.RelOptRule

org.apache.calcite.rel.rules.ProjectWindowTransposeRule

public class ProjectWindowTransposeRule
extends RelOptRule

Planner rule that pushes a LogicalProject past a LogicalWindow.

Field Summary

Fields

Modifier and Type	Field and Description
static ProjectWindowTransposeRule	INSTANCE The default instance of ProjectWindowTransposeRule.

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

description, operands, relBuilderFactory

Constructor Summary

Constructors

Constructor and Description
ProjectWindowTransposeRule(RelBuilderFactory relBuilderFactory) Creates ProjectWindowTransposeRule.

Method Summary

Modifier and Type	Method and Description
private ImmutableBitSet	findReference(LogicalProject project, LogicalWindow window)
private int	getAdjustedIndex(int initIndex, ImmutableBitSet beReferred, int windowInputColumn)
void	onMatch(RelOptRuleCall call) Receives notification about a rule match.

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

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

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static final ProjectWindowTransposeRule INSTANCE

The default instance of ProjectWindowTransposeRule.

Constructor Detail

ProjectWindowTransposeRule

public ProjectWindowTransposeRule(RelBuilderFactory relBuilderFactory)

Creates ProjectWindowTransposeRule.

Parameters:

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)

findReference

private ImmutableBitSet findReference(LogicalProject project,
                                      LogicalWindow window)

getAdjustedIndex

private int getAdjustedIndex(int initIndex,
                             ImmutableBitSet beReferred,
                             int windowInputColumn)