org.apache.hadoop.hive.ql.optimizer.calcite.rules

Class HiveRewriteToDataSketchesRules.PercentileDiscRewrite

java.lang.Object

org.apache.calcite.plan.RelOptRule

org.apache.hadoop.hive.ql.optimizer.calcite.rules.HiveRewriteToDataSketchesRules.PercentileDiscRewrite

Enclosing class:

HiveRewriteToDataSketchesRules

public static class HiveRewriteToDataSketchesRules.PercentileDiscRewrite
extends org.apache.calcite.plan.RelOptRule

Rewrites percentile_disc(0.2) within group (order by id).

   SELECT PERCENTILE_DISC(0.2) WITHIN GROUP(ORDER BY ID) FROM sketch_input;
   ⇒ SELECT ds_kll_quantile(ds_kll_sketch(CAST(id AS FLOAT)), 0.2) FROM sketch_input;
 

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 and Description
PercentileDiscRewrite(String sketchType)

Method Summary

Modifier and Type	Method and Description
protected org.apache.hadoop.hive.ql.optimizer.calcite.rules.HiveRewriteToDataSketchesRules.PercentileDiscRewrite.VBuilderPAP	processCall(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

Constructor Detail

PercentileDiscRewrite

public PercentileDiscRewrite(String sketchType)

Method Detail

processCall

protected org.apache.hadoop.hive.ql.optimizer.calcite.rules.HiveRewriteToDataSketchesRules.PercentileDiscRewrite.VBuilderPAP processCall(org.apache.calcite.plan.RelOptRuleCall call)