Package org.apache.druid.sql.calcite.rule

Class SortCollapseRule

java.lang.Object
org.apache.calcite.plan.RelOptRule
org.apache.druid.sql.calcite.rule.SortCollapseRule
public class SortCollapseRule extends org.apache.calcite.plan.RelOptRule
Collapses two adjacent Sort operations together. Useful for queries like SELECT * FROM (SELECT DISTINCT dim2 FROM druid.foo ORDER BY dim2) LIMIT 10.

  • Nested Class Summary

    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.RelOptRule

    description, operands, relBuilderFactory

  • Constructor Summary

    Constructors
    Constructor
    Description
    SortCollapseRule()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    static SortCollapseRule
    instance()
     
    void
    onMatch(org.apache.calcite.plan.RelOptRuleCall call)
     

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

    any, convert, convert, 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

  • Constructor Details

    • SortCollapseRule

      public SortCollapseRule()

  • Method Details

    • instance

      public static SortCollapseRule instance()

    • onMatch

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