org.apache.hadoop.hive.ql.plan
Class ExprNodeDescUtils

java.lang.Object
  org.apache.hadoop.hive.ql.plan.ExprNodeDescUtils

public class ExprNodeDescUtils
extends Object

Constructor Summary

ExprNodeDescUtils()

Method Summary

static boolean	containsPredicate(ExprNodeDesc source, ExprNodeDesc predicate) return true if predicate is already included in source
static int	indexOf(ExprNodeDesc origin, List<ExprNodeDesc> sources)
static ExprNodeDesc	mergePredicates(ExprNodeDesc prev, ExprNodeDesc next) bind two predicates by AND op
static ExprNodeDesc	replace(ExprNodeDesc origin, List<ExprNodeDesc> sources, List<ExprNodeDesc> targets)

Methods inherited from class java.lang.Object

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

Constructor Detail

ExprNodeDescUtils

public ExprNodeDescUtils()

Method Detail

indexOf

public static int indexOf(ExprNodeDesc origin,
                          List<ExprNodeDesc> sources)

replace

public static ExprNodeDesc replace(ExprNodeDesc origin,
                                   List<ExprNodeDesc> sources,
                                   List<ExprNodeDesc> targets)

containsPredicate

public static boolean containsPredicate(ExprNodeDesc source,
                                        ExprNodeDesc predicate)

return true if predicate is already included in source

mergePredicates

public static ExprNodeDesc mergePredicates(ExprNodeDesc prev,
                                           ExprNodeDesc next)

bind two predicates by AND op