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

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

All Implemented Interfaces:

NodeProcessor

Enclosing class:

StatsRulesProcFactory

public static class StatsRulesProcFactory.LimitStatsRule
extends StatsRulesProcFactory.DefaultStatsRule
implements NodeProcessor

LIMIT operator changes the number of rows and thereby the data size.

Constructor Summary

StatsRulesProcFactory.LimitStatsRule()

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.LimitStatsRule

public StatsRulesProcFactory.LimitStatsRule()

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

Overrides:

process in class StatsRulesProcFactory.DefaultStatsRule

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