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

Class HiveSortPullUpConstantsRule

java.lang.Object

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

public final class HiveSortPullUpConstantsRule
extends Object

Planner rule that pulls up constant keys through a SortLimit or SortExchange operator.

This rule is only applied on SortLimit operators that are not the root of the plan tree. This is done because the interaction of this rule with the AST conversion may cause some optimizations to not kick in e.g. SimpleFetchOptimizer. Nevertheless, this will not have any performance impact in the resulting plans.

Field Summary

Fields

Modifier and Type	Field and Description
static org.apache.hadoop.hive.ql.optimizer.calcite.rules.HiveSortPullUpConstantsRule.HiveSortExchangePullUpConstantsRule	SORT_EXCHANGE_INSTANCE
static org.apache.hadoop.hive.ql.optimizer.calcite.rules.HiveSortPullUpConstantsRule.HiveSortPullUpConstantsRuleBase<HiveSortLimit>	SORT_LIMIT_INSTANCE

Method Summary

Methods inherited from class java.lang.Object

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

Field Detail

SORT_LIMIT_INSTANCE

public static final org.apache.hadoop.hive.ql.optimizer.calcite.rules.HiveSortPullUpConstantsRule.HiveSortPullUpConstantsRuleBase<HiveSortLimit> SORT_LIMIT_INSTANCE

SORT_EXCHANGE_INSTANCE

public static final org.apache.hadoop.hive.ql.optimizer.calcite.rules.HiveSortPullUpConstantsRule.HiveSortExchangePullUpConstantsRule SORT_EXCHANGE_INSTANCE