Package org.apache.flink.table.planner.plan.rules.logical

Class RewriteMinusAllRule

java.lang.Object

org.apache.calcite.plan.RelOptRule

org.apache.calcite.plan.RelRule<RewriteMinusAllRule.RewriteMinusAllRuleConfig>

org.apache.flink.table.planner.plan.rules.logical.RewriteMinusAllRule

@Enclosing
public class RewriteMinusAllRule
extends org.apache.calcite.plan.RelRule<RewriteMinusAllRule.RewriteMinusAllRuleConfig>

Replaces logical Minus operator using a combination of union all, aggregate and table function.

Original Query : SELECT c1 FROM ut1 EXCEPT ALL SELECT c1 FROM ut2

Rewritten Query:
 SELECT c1 FROM ( SELECT c1, sum_val FROM ( SELECT c1, sum(vcol_marker)
 AS sum_val FROM ( SELECT c1, 1L as vcol_marker FROM ut1 UNION ALL SELECT c1, -1L as vcol_marker
 FROM ut2 ) AS union_all GROUP BY union_all.c1 ) WHERE sum_val > 0 )
 LATERAL TABLE(replicate_row(sum_val, c1)) AS T(c1) 
 

Only handle the case of input size 2.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	RewriteMinusAllRule.RewriteMinusAllRuleConfig	Rule configuration.

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

org.apache.calcite.plan.RelRule.Config, org.apache.calcite.plan.RelRule.Done, org.apache.calcite.plan.RelRule.MatchHandler<R extends org.apache.calcite.plan.RelOptRule>, org.apache.calcite.plan.RelRule.OperandBuilder, org.apache.calcite.plan.RelRule.OperandDetailBuilder<R extends org.apache.calcite.rel.RelNode>, org.apache.calcite.plan.RelRule.OperandTransform

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

org.apache.calcite.plan.RelOptRule.ConverterRelOptRuleOperand

Field Summary

Fields

Modifier and Type	Field	Description
static RewriteMinusAllRule	INSTANCE

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
protected	RewriteMinusAllRule(RewriteMinusAllRule.RewriteMinusAllRuleConfig config)

Method Summary

Modifier and Type	Method	Description
boolean	matches(org.apache.calcite.plan.RelOptRuleCall call)
void	onMatch(org.apache.calcite.plan.RelOptRuleCall call)

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

any, convert, convert, convertList, convertOperand, convertOperand, equals, equals, getOperand, getOperands, getOutConvention, getOutTrait, hashCode, 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 RewriteMinusAllRule INSTANCE

Constructor Detail

RewriteMinusAllRule

protected RewriteMinusAllRule(RewriteMinusAllRule.RewriteMinusAllRuleConfig config)

Method Detail

matches

public boolean matches(org.apache.calcite.plan.RelOptRuleCall call)

Overrides:

matches in class org.apache.calcite.plan.RelOptRule

onMatch

public void onMatch(org.apache.calcite.plan.RelOptRuleCall call)

Specified by:

onMatch in class org.apache.calcite.plan.RelOptRule