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

Class HiveRewriteToDataSketchesRules.AbstractRankBasedRewriteRule.AbstractRankBasedRewriteBuilder

java.lang.Object

org.apache.hadoop.hive.ql.optimizer.calcite.rules.HiveRewriteToDataSketchesRules.WindowingToProjectAggregateJoinProject.VbuilderPAP

org.apache.hadoop.hive.ql.optimizer.calcite.rules.HiveRewriteToDataSketchesRules.AbstractRankBasedRewriteRule.AbstractRankBasedRewriteBuilder

Enclosing class:

HiveRewriteToDataSketchesRules.AbstractRankBasedRewriteRule

protected abstract static class HiveRewriteToDataSketchesRules.AbstractRankBasedRewriteRule.AbstractRankBasedRewriteBuilder
extends HiveRewriteToDataSketchesRules.WindowingToProjectAggregateJoinProject.VbuilderPAP

Field Summary

Fields inherited from class org.apache.hadoop.hive.ql.optimizer.calcite.rules.HiveRewriteToDataSketchesRules.WindowingToProjectAggregateJoinProject.VbuilderPAP

relBuilder, rexBuilder

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractRankBasedRewriteBuilder(String sketchClass, org.apache.calcite.tools.RelBuilder relBuilder)

Method Summary

Modifier and Type	Method and Description
protected abstract org.apache.calcite.rex.RexNode	evaluateRankValue(org.apache.calcite.rex.RexNode rank, org.apache.calcite.rex.RexOver over, org.apache.calcite.rex.RexInputRef sketchInputRef) The concreate rewrite should transform the rank value into the desired range/type/etc.
protected abstract boolean	isApplicable1(org.apache.calcite.rex.RexOver over) The concreate rewrite should filter supported expressions.

Methods inherited from class org.apache.hadoop.hive.ql.optimizer.calcite.rules.HiveRewriteToDataSketchesRules.WindowingToProjectAggregateJoinProject.VbuilderPAP

getFloatType, getSqlOperator, processProject

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AbstractRankBasedRewriteBuilder

protected AbstractRankBasedRewriteBuilder(String sketchClass,
                                          org.apache.calcite.tools.RelBuilder relBuilder)

Method Detail

isApplicable1

protected abstract boolean isApplicable1(org.apache.calcite.rex.RexOver over)

The concreate rewrite should filter supported expressions.

Parameters:

over - the windowing expression in question

Returns:

evaluateRankValue

protected abstract org.apache.calcite.rex.RexNode evaluateRankValue(org.apache.calcite.rex.RexNode rank,
                                                                    org.apache.calcite.rex.RexOver over,
                                                                    org.apache.calcite.rex.RexInputRef sketchInputRef)

The concreate rewrite should transform the rank value into the desired range/type/etc.

Parameters:

rank - the current rank value is in the range of [0,1]

over - the windowing expression

sketchInputRef - the sketch is accessible thru this fields if needed

Returns: