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

java.lang.Object
  org.apache.hadoop.hive.ql.exec.ExprNodeEvaluator<ExprNodeColumnDesc>
      org.apache.hadoop.hive.ql.exec.ExprNodeColumnEvaluator

public class ExprNodeColumnEvaluator
extends ExprNodeEvaluator<ExprNodeColumnDesc>

This evaluator gets the column from the row object.

Constructor Summary

ExprNodeColumnEvaluator(ExprNodeColumnDesc expr)

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

ExprNodeColumnEvaluator

public ExprNodeColumnEvaluator(ExprNodeColumnDesc expr)

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<ExprNodeColumnDesc>

Throws:

HiveException