org.apache.hadoop.hive.ql.exec
Class ExprNodeEvaluatorHead

java.lang.Object
  org.apache.hadoop.hive.ql.exec.ExprNodeEvaluator
      org.apache.hadoop.hive.ql.exec.ExprNodeEvaluatorHead

public class ExprNodeEvaluatorHead
extends ExprNodeEvaluator

Increases version number of each evaluations for correct caching

Constructor Summary

ExprNodeEvaluatorHead(ExprNodeEvaluator referencing)

Method Summary

ObjectInspector

initialize(ObjectInspector rowInspector) Initialize should be called once and only once.

Methods inherited from class org.apache.hadoop.hive.ql.exec.ExprNodeEvaluator

evaluate, getChildren, getExpr, getOutputOI, isDeterministic, isStateful

Methods inherited from class java.lang.Object

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

Constructor Detail

ExprNodeEvaluatorHead

public ExprNodeEvaluatorHead(ExprNodeEvaluator referencing)

Method Detail

initialize

public ObjectInspector initialize(ObjectInspector rowInspector)
                           throws HiveException

Description copied from class: ExprNodeEvaluator

Initialize should be called once and only once. Return the ObjectInspector for the return value, given the rowInspector.

Specified by:

initialize in class ExprNodeEvaluator

Throws:

HiveException