org.apache.hadoop.hive.ql.optimizer.stats.annotation
Class StatsRulesProcFactory.DefaultStatsRule

java.lang.Object
  org.apache.hadoop.hive.ql.optimizer.stats.annotation.StatsRulesProcFactory.DefaultStatsRule

All Implemented Interfaces:

NodeProcessor

Direct Known Subclasses:

StatsRulesProcFactory.FilterStatsRule, StatsRulesProcFactory.GroupByStatsRule, StatsRulesProcFactory.JoinStatsRule, StatsRulesProcFactory.LimitStatsRule, StatsRulesProcFactory.SelectStatsRule, StatsRulesProcFactory.TableScanStatsRule

Enclosing class:

StatsRulesProcFactory

public static class StatsRulesProcFactory.DefaultStatsRule
extends Object
implements NodeProcessor

Default rule is to aggregate the statistics from all its parent operators.

Constructor Summary

StatsRulesProcFactory.DefaultStatsRule()

Method Summary

Object

process(Node nd, Stack<Node> stack, NodeProcessorCtx procCtx, Object... nodeOutputs) Generic process for all ops that don't have specific implementations.

Methods inherited from class java.lang.Object

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

Constructor Detail

StatsRulesProcFactory.DefaultStatsRule

public StatsRulesProcFactory.DefaultStatsRule()

Method Detail

process

public Object process(Node nd,
                      Stack<Node> stack,
                      NodeProcessorCtx procCtx,
                      Object... nodeOutputs)
               throws SemanticException

Description copied from interface: NodeProcessor

Generic process for all ops that don't have specific implementations.

Specified by:

process in interface NodeProcessor

Parameters:

nd - operator to process

procCtx - operator processor context

nodeOutputs - A variable argument list of outputs from other nodes in the walk

Returns:

Object to be returned by the process call

Throws:

SemanticException