org.apache.hadoop.hive.ql.optimizer.pcr
Class PcrOpProcFactory

java.lang.Object
  org.apache.hadoop.hive.ql.optimizer.pcr.PcrOpProcFactory

public final class PcrOpProcFactory
extends Object

PcrOpProcFactory contains processors that process expression tree of filter operators following table scan operators. It walks the expression tree of the filter operator to remove partition predicates when possible. If the filter operator can be removed, the whole operator is marked to be removed later on, otherwise the predicate is changed

Nested Class Summary

static class	PcrOpProcFactory.DefaultPCR Default processor which does nothing
static class	PcrOpProcFactory.FilterPCR Remove partition condition in a filter operator when possible.

Method Summary

static NodeProcessor	getDefaultProc()
static NodeProcessor	getFilterProc()

Methods inherited from class java.lang.Object

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

Method Detail

getFilterProc

public static NodeProcessor getFilterProc()

getDefaultProc

public static NodeProcessor getDefaultProc()