Package org.apache.calcite.sql2rel

Class RelDecorrelator.RemoveSingleAggregateRule

java.lang.Object
org.apache.calcite.plan.RelOptRule
org.apache.calcite.plan.RelRule<RelDecorrelator.RemoveSingleAggregateRule.RemoveSingleAggregateRuleConfig>
org.apache.calcite.sql2rel.RelDecorrelator.RemoveSingleAggregateRule
Enclosing class:
RelDecorrelator
public static final class RelDecorrelator.RemoveSingleAggregateRule extends org.apache.calcite.plan.RelRule<RelDecorrelator.RemoveSingleAggregateRule.RemoveSingleAggregateRuleConfig>
Rule to remove an Aggregate with SINGLE_VALUE. For cases like:

Aggregate(SINGLE_VALUE) Project(single expression) Aggregate

For instance (subtree taken from TPCH query 17):

LogicalAggregate(group=[{}], agg#0=[SINGLE_VALUE($0)]) LogicalProject(EXPR$0=[*(0.2:DECIMAL(2, 1), $0)]) LogicalAggregate(group=[{}], agg#0=[AVG($0)]) LogicalProject(L_QUANTITY=[$4]) LogicalFilter(condition=[=($1, $cor0.P_PARTKEY)]) LogicalTableScan(table=[[TPCH_01, LINEITEM]])

Will be converted into:

LogicalProject($f0=[*(0.2:DECIMAL(2, 1), $0)]) LogicalAggregate(group=[{}], agg#0=[AVG($0)]) LogicalProject(L_QUANTITY=[$4]) LogicalFilter(condition=[=($1, $cor0.P_PARTKEY)]) LogicalTableScan(table=[[TPCH_01, LINEITEM]])

  • Nested Class Summary

    Nested Classes
    Modifier and Type
    Class
    Description
    static interface 
    RelDecorrelator.RemoveSingleAggregateRule.RemoveSingleAggregateRuleConfig
    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 inherited from class org.apache.calcite.plan.RelRule

    config

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

    description, operands, relBuilderFactory

  • Method Summary

    Modifier and Type
    Method
    Description
    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, 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

  • Method Details

    • onMatch

      public void onMatch(org.apache.calcite.plan.RelOptRuleCall call)
      Specified by:
      onMatch in class org.apache.calcite.plan.RelOptRule