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 final 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 Details

  • Constructor Details

  • Method Details

    • 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