org.apache.hadoop.hive.ql.optimizer.ppr
Class OpProcFactory

java.lang.Object
  org.apache.hadoop.hive.ql.optimizer.PrunerOperatorFactory
      org.apache.hadoop.hive.ql.optimizer.ppr.OpProcFactory

public final class OpProcFactory
extends PrunerOperatorFactory

Operator factory for partition pruning processing of operator graph We find all the filter operators that appear just beneath the table scan operators. We then pass the filter to the partition pruner to construct a pruner for that table alias and store a mapping from the table scan operator to that pruner. We call that pruner later during plan generation. Refactor: Move main logic to PrunerOperatorFactory. OpProcFactory extends it to reuse logic. Any other pruner can reuse it by creating a class extending from PrunerOperatorFactory. Only specific logic is in generatePredicate(..) which is in its own class like OpProcFactory.

Nested Class Summary

static class

OpProcFactory.FilterPPR Determines the partition pruner for the filter.

Nested classes/interfaces inherited from class org.apache.hadoop.hive.ql.optimizer.PrunerOperatorFactory

PrunerOperatorFactory.DefaultPruner, PrunerOperatorFactory.FilterPruner

Method Summary

static NodeProcessor

getFilterProc()

Methods inherited from class org.apache.hadoop.hive.ql.optimizer.PrunerOperatorFactory

getDefaultProc

Methods inherited from class java.lang.Object

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

Method Detail

getFilterProc

public static NodeProcessor getFilterProc()